Moving IAAS Adaptor from APPC to CCSDK SLI

Issue-ID: CCSDK-3198
Signed-off-by: Singal, Kapil (ks220y) <ks220y@att.com>
Change-Id: I24c21a9bebe87bb87eb14bd903ee558c20b45277

20 files changed, 2485 insertions, 3 deletions

diff --git a/core/utils/provider/src/main/java/org/onap/ccsdk/sli/core/utils/StructuredPropertyHelper.java b/core/utils/provider/src/main/java/org/onap/ccsdk/sli/core/utils/StructuredPropertyHelper.java
new file mode 100644
index 000000000..c9fc56c34
--- /dev/null
+++ b/core/utils/provider/src/main/java/org/onap/ccsdk/sli/core/utils/StructuredPropertyHelper.java
@@ -0,0 +1,257 @@
+/*-
+ * ============LICENSE_START=======================================================
+ * ONAP : APPC
+ * ================================================================================
+ * Copyright (C) 2017-2018 AT&T Intellectual Property. All rights reserved.
+ * ================================================================================
+ * Copyright (C) 2017 Amdocs
+ * =============================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * ============LICENSE_END=========================================================
+ */
+
+package org.onap.ccsdk.sli.core.utils;
+
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Properties;
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+
+/**
+ * This class is used to assemble properties that are defined using a structured name into groups, and allow them to be
+ * processed as sets of definitions.
+ * <p>
+ * For example, a structured name uses a dotted-notation, like "provider.name". Further, the nodes of the structured
+ * name may be serialized using a suffix ordinal number (e.g., "provider1.name"). These structured properties form a
+ * hierarchical name space where the names are grouped together and can be retrieved as a set.
+ * </p>
+ *
+ */
+
+public class StructuredPropertyHelper {
+
+    /**
+     * This method scans the properties object for all properties that match the root name and constructs a list of
+     * structured property node graphs that represents the namespaces of the properties.
+     * <p>
+     * For example, assume that there are structured properties of the form "provider1.name", "provider2.name",
+     * "provider3.name", and so forth. There may also be other subordinate properties as well (e.g., "provider1.type").
+     * This method would construct a list of graphs of nodes, where each node represents one value of the structured
+     * name. The roots would be the values "provider1", "provider2", "provider3", and so forth. The values of the
+     * subordinate nodes would be the second, third, and so forth name nodes of the compound name. The value of the
+     * property is associated with nodes that are representative of the leaf of the name space.
+     * </p>
+     *
+     * @param properties
+     *            The properties to be processed
+     * @param prefix
+     *            The prefix of the root structured property name
+     * @return The node graph of the properties
+     */
+    public static List<Node> getStructuredProperties(Properties properties, String prefix) {
+        List<Node> roots = new ArrayList<>();
+
+        for (String name : properties.stringPropertyNames()) {
+            if (name.startsWith(prefix)) {
+                String value = properties.getProperty(name);
+                processNamespace(roots, name, value);
+            }
+        }
+
+        return roots;
+    }
+
+    /**
+     * This method recursively walks the name space of the structured property and constructs the node graph to
+     * represent the property
+     *
+     * @param nodes
+     *            The collection of nodes for the current level of the name space
+     * @param propertyName
+     *            The name of the node
+     * @param value
+     *            The value, if any
+     * @return The node for this level in the namespace
+     */
+    @SuppressWarnings("nls")
+    private static Node processNamespace(List<Node> nodes, String propertyName, String value) {
+        String[] tokens = propertyName.split("\\.", 2);
+        String nodeName = normalizeNodeName(tokens[0]);
+
+        Node namespaceNode = null;
+        for (Node node : nodes) {
+            if (node.getName().equals(nodeName)) {
+                namespaceNode = node;
+                break;
+            }
+        }
+        if (namespaceNode == null) {
+            namespaceNode = new Node();
+            namespaceNode.setName(nodeName);
+            nodes.add(namespaceNode);
+        }
+
+        if (tokens.length == 1 || tokens[1] == null || tokens[1].length() == 0) {
+            namespaceNode.setValue(value);
+        } else {
+            processNamespace(namespaceNode.getChildren(), tokens[1], value);
+        }
+
+        return namespaceNode;
+    }
+
+    /**
+     * This method normalizes a node name of the structured property name by removing leading and trailing whitespace,
+     * and by converting any ordinal position to a simple expression without leading zeroes.
+     *
+     * @param token
+     *            The token to be normalized
+     * @return The normalized name, or null if the token was null;
+     */
+    @SuppressWarnings("nls")
+    private static String normalizeNodeName(String token) {
+        if (token == null) {
+            return null;
+        }
+
+        StringBuilder builder = new StringBuilder(token.trim());
+        Pattern pattern = Pattern.compile("([^0-9]+)([0-9]*)");
+        Matcher matcher = pattern.matcher(builder);
+        if (matcher.matches()) {
+            String nameRoot = matcher.group(1);
+            String ordinal = matcher.group(2);
+            if (ordinal != null && ordinal.length() > 0) {
+                int i = Integer.parseInt(ordinal);
+                builder.setLength(0);
+                builder.append(nameRoot);
+                builder.append(Integer.toString(i));
+            }
+        }
+        return builder.toString();
+    }
+
+    /**
+     * This class represents a node in the structured property name space
+     *
+     */
+    public static class Node implements Comparable<Node> {
+
+        /**
+         * The name of the structured property node
+         */
+        private String name;
+
+        /**
+         * If the node is a leaf, then the value of the property
+         */
+        private String value;
+
+        /**
+         * If the node is not a leaf, then the sub-nodes of the property
+         */
+        private List<Node> children;
+
+        /**
+         * @return the value of name
+         */
+        public String getName() {
+            return name;
+        }
+
+        /**
+         * @param name
+         *            the value for name
+         */
+        public void setName(String name) {
+            this.name = name;
+        }
+
+        /**
+         * @return the value of value
+         */
+        public String getValue() {
+            return value;
+        }
+
+        /**
+         * @param value
+         *            the value for value
+         */
+        public void setValue(String value) {
+            this.value = value;
+        }
+
+        /**
+         * @return the value of children
+         */
+        public List<Node> getChildren() {
+            if (children == null) {
+                children = new ArrayList<>();
+            }
+            return children;
+        }
+
+        /**
+         * @see Object#hashCode()
+         */
+        @Override
+        public int hashCode() {
+            return name.hashCode() + (value != null ? value.hashCode() : children.hashCode());
+        }
+
+        /**
+         * @see Object#equals(Object)
+         */
+        @Override
+        public boolean equals(Object obj) {
+            if (obj == null)
+                return false;
+            if (this.getClass() != obj.getClass())
+                return false;
+
+            Node other = (Node) obj;
+            boolean result = name.equals(other.name);
+
+            if (value == null) {
+                result &= other.value == null;
+            } else {
+                result &= value.equals(other.value);
+            }
+            if (children == null) {
+                result &= other.children == null;
+            } else {
+                result &= children.equals(other.children);
+            }
+            return result;
+        }
+
+        /**
+         * @see Object#toString()
+         */
+        @SuppressWarnings("nls")
+        @Override
+        public String toString() {
+            if (value != null) {
+                return String.format("%s = %s", name, value);
+            }
+            return String.format("%s.%s", name, children.toString());
+        }
+
+        @Override
+        public int compareTo(Node o) {
+            return name.compareTo(o.name);
+        }
+    }
+}
diff --git a/core/utils/provider/src/main/java/org/onap/ccsdk/sli/core/utils/configuration/ConfigurationFactory.java b/core/utils/provider/src/main/java/org/onap/ccsdk/sli/core/utils/configuration/ConfigurationFactory.java
index 05c132d0f..9f0289458 100644
--- a/core/utils/provider/src/main/java/org/onap/ccsdk/sli/core/utils/configuration/ConfigurationFactory.java
+++ b/core/utils/provider/src/main/java/org/onap/ccsdk/sli/core/utils/configuration/ConfigurationFactory.java
@@ -124,7 +124,7 @@ public final class ConfigurationFactory {
     /**
      * The default properties resource to be loaded
      */
-    private static final String DEFAULT_PROPERTIES = "org/onap/appc/default.properties";
+    private static final String DEFAULT_PROPERTIES = "default.properties";
 
     /**
      * This collection allows for special configurations to be created and maintained, organized by
@@ -301,8 +301,7 @@ public final class ConfigurationFactory {
         /*
          * Load the defaults (if any are present)
          */
-        InputStream in = Thread.currentThread().getContextClassLoader()
-                .getResourceAsStream(DEFAULT_PROPERTIES);
+        InputStream in = Thread.currentThread().getContextClassLoader().getResourceAsStream(DEFAULT_PROPERTIES);
         if (in != null) {
             logger.info(Msg.LOADING_DEFAULTS, DEFAULT_PROPERTIES);
             try {
diff --git a/core/utils/provider/src/main/java/org/onap/ccsdk/sli/core/utils/pool/Allocator.java b/core/utils/provider/src/main/java/org/onap/ccsdk/sli/core/utils/pool/Allocator.java
new file mode 100644
index 000000000..a9c781f65
--- /dev/null
+++ b/core/utils/provider/src/main/java/org/onap/ccsdk/sli/core/utils/pool/Allocator.java
@@ -0,0 +1,45 @@
+/*-
+ * ============LICENSE_START=======================================================
+ * ONAP : APPC
+ * ================================================================================
+ * Copyright (C) 2017-2018 AT&T Intellectual Property. All rights reserved.
+ * ================================================================================
+ * Copyright (C) 2017 Amdocs
+ * =============================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * ============LICENSE_END=========================================================
+ */
+
+package org.onap.ccsdk.sli.core.utils.pool;
+
+import java.io.Closeable;
+
+/**
+ * This interface is used to supply an object that will be called by the pool manager whenever a new widget must be
+ * allocated.
+ * @param <T>
+ *            The generic type that we are caching.
+ */
+
+public interface Allocator<T extends Closeable> {
+
+    /**
+     * Allocate an object of type <T> and return it to the pool
+     *
+     * @param pool
+     *            The pool that the object is to be allocated to
+     * @return An object of type T
+     */
+    T allocate(org.onap.ccsdk.sli.core.utils.pool.Pool<T> pool);
+}
diff --git a/core/utils/provider/src/main/java/org/onap/ccsdk/sli/core/utils/pool/CacheManagement.java b/core/utils/provider/src/main/java/org/onap/ccsdk/sli/core/utils/pool/CacheManagement.java
new file mode 100644
index 000000000..d3d47e759
--- /dev/null
+++ b/core/utils/provider/src/main/java/org/onap/ccsdk/sli/core/utils/pool/CacheManagement.java
@@ -0,0 +1,33 @@
+/*-
+ * ============LICENSE_START=======================================================
+ * ONAP : APPC
+ * ================================================================================
+ * Copyright (C) 2017-2018 AT&T Intellectual Property. All rights reserved.
+ * ================================================================================
+ * Copyright (C) 2017 Amdocs
+ * =============================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * ============LICENSE_END=========================================================
+ */
+
+package org.onap.ccsdk.sli.core.utils.pool;
+
+public interface CacheManagement {
+
+    /**
+     * @return The object that is actually being wrapped and cached
+     */
+    Object getWrappedObject();
+
+}
diff --git a/core/utils/provider/src/main/java/org/onap/ccsdk/sli/core/utils/pool/CachedElement.java b/core/utils/provider/src/main/java/org/onap/ccsdk/sli/core/utils/pool/CachedElement.java
new file mode 100644
index 000000000..2816edd20
--- /dev/null
+++ b/core/utils/provider/src/main/java/org/onap/ccsdk/sli/core/utils/pool/CachedElement.java
@@ -0,0 +1,217 @@
+/*-
+ * ============LICENSE_START=======================================================
+ * ONAP : APPC
+ * ================================================================================
+ * Copyright (C) 2017-2018 AT&T Intellectual Property. All rights reserved.
+ * ================================================================================
+ * Copyright (C) 2017 Amdocs
+ * =============================================================================
+ * Modifications Copyright (C) 2019 IBM
+ * =============================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * ============LICENSE_END=========================================================
+ */
+
+package org.onap.ccsdk.sli.core.utils.pool;
+
+import com.att.eelf.configuration.EELFLogger;
+import com.att.eelf.configuration.EELFManager;
+import java.io.Closeable;
+import java.io.IOException;
+import java.lang.reflect.InvocationHandler;
+import java.lang.reflect.Method;
+import java.lang.reflect.Proxy;
+import java.util.concurrent.atomic.AtomicBoolean;
+
+/**
+ * This class is used as a "wrapper" for any closeable elements that are cached in a pool. It is
+ * implemented as a dynamic proxy, so that it appears to be the same class of object to the client
+ * as the interface being cached. The generic type being cached MUST be an interface.
+ *
+ * @param <T> The generic type that we create a cached element for. This type is used to wrap
+ *        instances of this type and expose access to the {@link Closeable} interface by
+ *        using a dynamic proxy.
+ */
+
+public class CachedElement<T extends Closeable>
+        implements Closeable, InvocationHandler, CacheManagement {
+        private static final EELFLogger LOG = EELFManager.getInstance().getLogger(CachedElement.class);
+
+    /**
+     * The pool that is managing this cached element
+     */
+    private Pool<T> pool;
+
+    /**
+     * The element that we are caching in the pool
+     */
+    private T element;
+
+    /**
+     * A thread-safe atomic indicator that tells us that the wrapped element has been released to
+     * the pool already, and not to do it again.
+     */
+    private AtomicBoolean released = new AtomicBoolean(false);
+
+    /**
+     * Create a new instance of a cached element dynamic proxy for use in the pool.
+     * <p>
+     * This returns an instance of the proxy to the caller that appears to be the same interface(s)
+     * as the object being cached. The dynamic proxy then intercepts all open and close semantics
+     * and directs that element to the pool.
+     * </p>
+     * <p>
+     * If the object being proxied does not implement the {@link CacheManagement} interface, then
+     * that interface is added to the dynamic proxy being created. This interface is actually
+     * implemented by the invocation handler (this object) for the proxy and allows direct access to
+     * the wrapped object inside the proxy.
+     * </p>
+     *
+     * @param pool The pool that we are caching these elements within
+     * @param element The element actually being cached
+     * @param interfaces The interface list of interfaces the element must implement (usually one)
+     * @return The dynamic proxy
+     */
+    @SuppressWarnings("unchecked")
+    public static <T extends Closeable> T newInstance(Pool<T> pool, T element,
+            Class<?>[] interfaces) {
+        ClassLoader cl = element.getClass().getClassLoader();
+        CachedElement<T> ce = new CachedElement<>(pool, element);
+        boolean found = false;
+        for (Class<?> intf : interfaces) {
+            if (intf.isAssignableFrom(CacheManagement.class)) {
+                found = true;
+                break;
+            }
+        }
+
+        int length = found ? interfaces.length : interfaces.length + 1;
+        Class<?>[] proxyInterfaces = new Class[length];
+        System.arraycopy(interfaces, 0, proxyInterfaces, 0, interfaces.length);
+
+        if (!found) {
+            proxyInterfaces[interfaces.length] = CacheManagement.class;
+        }
+
+        return (T) Proxy.newProxyInstance(cl, proxyInterfaces, ce);
+    }
+
+    /**
+     * Construct a cached element and assign it to the pool as a free element
+     *
+     * @param pool The pool that the element will be managed within
+     * @param element The element we are caching
+     */
+    @SuppressWarnings("unchecked")
+    public CachedElement(Pool<T> pool, T element) {
+        this.pool = pool;
+        this.element = element;
+
+        try {
+            pool.release((T) this);
+        } catch (PoolDrainedException e) {
+            LOG.error("Pool is empty", e);
+        }
+    }
+
+    /**
+     * This method delegates the close call to the actual wrapped element.
+     * <p>
+     * NOTE: This is not the same method that is called by the dynamic proxy. This method is in
+     * place to satisfy the signature of the {@link Closeable} interface. If it were to be
+     * called directly, then we will delegate the close to the underlying context. However, when the
+     * cached element is called as a synamic proxy, entry is in the
+     * {@link #invoke(Object, Method, Object[])} method.
+     * </p>
+     *
+     * @see Closeable#close()
+     */
+    @Override
+    public void close() throws IOException {
+        element.close();
+    }
+
+    /**
+     * This method is the magic part of dynamic proxies. When the caller makes a method call based
+     * on the interface being proxied, this method is given control. This informs us of the method
+     * and arguments of the call. The object reference is that of the dynamic proxy itself, which is
+     * us.
+     * <p>
+     * Here we will check to see if the user is trying to close the "element" (the dynamic proxy
+     * acts like the wrapped element). If he is, then we don't really close it, but instead release
+     * the element that we are wrapping back to the free pool. Once this has happened, we mark the
+     * element as "closed" (from the perspective of this dynamic proxy) so that we wont try to
+     * release it again.
+     * </p>
+     * <p>
+     * If the method is the <code>equals</code> method then we assume that we are comparing the
+     * cached element in one dynamic proxy to the cached element in another. We execute the
+     * comparison between the cached elements, and not the dynamic proxies themselves. This
+     * preserves the allusion to the caller that the dynamic proxy is the object being wrapped.
+     * </p>
+     * <p>
+     * For convenience, we also implement the <code>getWrappedObject</code> method so that the
+     * dynamic proxy can be called to obtain the actual wrapped object if desired. Note, to use this
+     * method, the caller would have to invoke it through reflection.
+     * </p>
+     * <p>
+     * If the method being invoked is not one that we intercept, then we simply delegate that method
+     * onto the wrapped object.
+     * </p>
+     *
+     * @see InvocationHandler#invoke(Object, Method,
+     *      Object[])
+     */
+    @SuppressWarnings({"unchecked", "nls"})
+    @Override
+    public Object invoke(Object proxy, Method method, Object[] args) throws Exception {
+        Object result = null;
+
+        switch (method.getName()) {
+            case "close":
+                if (released.compareAndSet(false, true) && !pool.isDrained()) {
+                    pool.release((T) proxy);
+                }
+                break;
+            case "equals":
+                CacheManagement cm = (CacheManagement) proxy;
+                T other = (T) cm.getWrappedObject();
+                result = element.equals(other);
+                break;
+            case "getWrappedObject":
+                return element;
+            default:
+                result = method.invoke(element, args);
+                break;
+        }
+
+        return result;
+    }
+
+    /**
+     * This method is used to be able to access the wrapped object underneath the dynamic proxy
+     *
+     * @see org.onap.ccsdk.sli.core.utils.pool.CacheManagement#getWrappedObject()
+     */
+    @Override
+    public T getWrappedObject() {
+        return element;
+    }
+
+    @SuppressWarnings("nls")
+    @Override
+    public String toString() {
+        return element == null ? "null" : element.toString();
+    }
+}
diff --git a/core/utils/provider/src/main/java/org/onap/ccsdk/sli/core/utils/pool/Destructor.java b/core/utils/provider/src/main/java/org/onap/ccsdk/sli/core/utils/pool/Destructor.java
new file mode 100644
index 000000000..10d94e13d
--- /dev/null
+++ b/core/utils/provider/src/main/java/org/onap/ccsdk/sli/core/utils/pool/Destructor.java
@@ -0,0 +1,44 @@
+/*-
+ * ============LICENSE_START=======================================================
+ * ONAP : APPC
+ * ================================================================================
+ * Copyright (C) 2017-2018 AT&T Intellectual Property. All rights reserved.
+ * ================================================================================
+ * Copyright (C) 2017 Amdocs
+ * =============================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * ============LICENSE_END=========================================================
+ */
+
+package org.onap.ccsdk.sli.core.utils.pool;
+
+import java.io.Closeable;
+
+/**
+ * @param <T>
+ *            The generic type we are caching
+ */
+
+public interface Destructor<T extends Closeable> {
+
+    /**
+     * Called to destroy the object when it is no longer being used by the pool
+     *
+     * @param obj
+     *            The object to be destroyed
+     * @param pool
+     *            The pool that the object is being removed from
+     */
+    void destroy(T obj, Pool<T> pool);
+}
diff --git a/core/utils/provider/src/main/java/org/onap/ccsdk/sli/core/utils/pool/Pool.java b/core/utils/provider/src/main/java/org/onap/ccsdk/sli/core/utils/pool/Pool.java
new file mode 100644
index 000000000..8ebdc8575
--- /dev/null
+++ b/core/utils/provider/src/main/java/org/onap/ccsdk/sli/core/utils/pool/Pool.java
@@ -0,0 +1,368 @@
+/*-
+ * ============LICENSE_START=======================================================
+ * ONAP : APPC
+ * ================================================================================
+ * Copyright (C) 2017-2018 AT&T Intellectual Property. All rights reserved.
+ * ================================================================================
+ * Copyright (C) 2017 Amdocs
+ * =============================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * ============LICENSE_END=========================================================
+ */
+
+package org.onap.ccsdk.sli.core.utils.pool;
+
+import java.io.Closeable;
+import java.util.ArrayDeque;
+import java.util.ArrayList;
+import java.util.Deque;
+import java.util.List;
+import java.util.ListIterator;
+import java.util.Properties;
+import java.util.concurrent.atomic.AtomicBoolean;
+import java.util.concurrent.locks.Lock;
+import java.util.concurrent.locks.ReadWriteLock;
+import java.util.concurrent.locks.ReentrantReadWriteLock;
+
+/**
+ * This class is used to manage a pool of things.
+ * <p>
+ * The class is parameterized so that the type of objects maintained in the pool is definable by some provided type.
+ * This type must implement the <code>Comparable</code> interface so that it can be managed in the pool.
+ * </p>
+ *
+ * @param <T>
+ *            The type of element being pooled
+ */
+
+public class Pool<T extends Closeable> {
+    private Deque<T> free;
+    private List<T> allocated;
+    private int minPool;
+    private int maxPool;
+    private Allocator<T> allocator;
+    private org.onap.ccsdk.sli.core.utils.pool.Destructor<T> destructor;
+    private ReadWriteLock lock;
+    private AtomicBoolean drained;
+    private Properties properties;
+
+    /**
+     * Create the pool
+     *
+     * @param minPool
+     *            The minimum size of the pool
+     * @param maxPool
+     *            The maximum size of the pool, set to zero (0) for unbounded
+     * @throws PoolSpecificationException
+     *             If the minimum size is less than 0, or if the max size is non-zero and less than the min size.
+     */
+    public Pool(int minPool, int maxPool) throws PoolSpecificationException {
+
+        if (minPool < 0) {
+            throw new PoolSpecificationException(String.format("The minimum pool size must be a "
+                + "positive value or zero, %d is not valid.", minPool));
+        }
+        if (maxPool != 0 && maxPool < minPool) {
+            throw new PoolSpecificationException(String.format("The maximum pool size must be a "
+                + "positive value greater than the minimum size, or zero. %d is not valid.", maxPool));
+        }
+
+        this.minPool = minPool;
+        this.maxPool = maxPool;
+
+        properties = new Properties();
+        free = new ArrayDeque<T>();
+        allocated = new ArrayList<T>();
+        lock = new ReentrantReadWriteLock();
+        drained = new AtomicBoolean(false);
+    }
+
+    /**
+     * Returns the amount of objects on the free collection
+     *
+     * @return The number of objects on the free collection
+     */
+    public int getFreeSize() {
+        Lock readLock = lock.readLock();
+        readLock.lock();
+        try {
+            return free.size();
+        } finally {
+            readLock.unlock();
+        }
+    }
+
+    /**
+     * Returns the value for a specified property of this pool, if defined.
+     *
+     * @param key
+     *            The key of the desired property
+     * @return The value of the property, or null if not defined
+     */
+    public String getProperty(String key) {
+        return properties.getProperty(key);
+    }
+
+    /**
+     * Sets the value of the specified property or replaces it if it already exists
+     *
+     * @param key
+     *            The key of the property to be set
+     * @param value
+     *            The value to set the property to
+     */
+    public void setProperty(String key, String value) {
+        properties.setProperty(key, value);
+    }
+
+    /**
+     * @return The properties object for the pool
+     */
+    public Properties getProperties() {
+        return properties;
+    }
+
+    /**
+     * Returns the number of objects that are currently allocated
+     *
+     * @return The allocate collection size
+     */
+    public int getAllocatedSize() {
+        Lock readLock = lock.readLock();
+        readLock.lock();
+        try {
+            return allocated.size();
+        } finally {
+            readLock.unlock();
+        }
+    }
+
+    /**
+     * @return the value of allocator
+     */
+    public Allocator<T> getAllocator() {
+        return allocator;
+    }
+
+    /**
+     * @param allocator
+     *            the value for allocator
+     */
+    public void setAllocator(Allocator<T> allocator) {
+        this.allocator = allocator;
+    }
+
+    /**
+     * @return the value of destructor
+     */
+    public org.onap.ccsdk.sli.core.utils.pool.Destructor<T> getDestructor() {
+        return destructor;
+    }
+
+    /**
+     * @return the value of minPool
+     */
+    public int getMinPool() {
+        return minPool;
+    }
+
+    /**
+     * @return the value of maxPool
+     */
+    public int getMaxPool() {
+        return maxPool;
+    }
+
+    /**
+     * @param destructor
+     *            the value for destructor
+     */
+    public void setDestructor(org.onap.ccsdk.sli.core.utils.pool.Destructor<T> destructor) {
+        this.destructor = destructor;
+    }
+
+    /**
+     * Drains the pool, releasing and destroying all pooled objects, even if they are currently allocated.
+     */
+    public void drain() {
+        if (drained.compareAndSet(false, true)) {
+            Lock writeLock = lock.writeLock();
+            writeLock.lock();
+            try {
+                int size = getAllocatedSize();
+                /*
+                 * We can't use the "release" method call here because we are modifying the list we are iterating
+                 */
+                ListIterator<T> it = allocated.listIterator();
+                while (it.hasNext()) {
+                    T obj = it.next();
+                    it.remove();
+                    free.addFirst(obj);
+                }
+                size = getFreeSize();
+                trim(size);
+            } finally {
+                writeLock.unlock();
+            }
+        }
+    }
+
+    /**
+     * Returns an indication if the pool has been drained
+     *
+     * @return True indicates that the pool has been drained. Once a pool has been drained, it can no longer be used.
+     */
+    public boolean isDrained() {
+        return drained.get();
+    }
+
+    /**
+     * Reserves an object of type T from the pool for the caller and returns it
+     *
+     * @return The object of type T to be used by the caller
+     * @throws org.onap.ccsdk.sli.core.utils.pool.PoolExtensionException
+     *             If the pool cannot be extended
+     * @throws org.onap.ccsdk.sli.core.utils.pool.PoolDrainedException
+     *             If the caller is trying to reserve an element from a drained pool
+     */
+    @SuppressWarnings("unchecked")
+    public T reserve() throws org.onap.ccsdk.sli.core.utils.pool.PoolExtensionException, org.onap.ccsdk.sli.core.utils.pool.PoolDrainedException {
+        if (isDrained()) {
+            throw new org.onap.ccsdk.sli.core.utils.pool.PoolDrainedException("The pool has been drained and cannot be used.");
+        }
+
+        T obj = null;
+        Lock writeLock = lock.writeLock();
+        writeLock.lock();
+        try {
+            int freeSize = getFreeSize();
+            int allocatedSize = getAllocatedSize();
+
+            if (freeSize == 0) {
+                if (allocatedSize == 0) {
+                    extend(minPool == 0 ? 1 : minPool);
+                } else if (allocatedSize >= maxPool && maxPool > 0) {
+                    throw new org.onap.ccsdk.sli.core.utils.pool.PoolExtensionException(String.format("Unable to add "
+                                                                                      + "more elements, pool is at maximum size of %d", maxPool));
+                } else {
+                    extend(1);
+                }
+            }
+
+            obj = free.removeFirst();
+            allocated.add(obj);
+        } finally {
+            writeLock.unlock();
+        }
+
+        /*
+         * Now that we have the real object, lets wrap it in a dynamic proxy so that we can intercept the close call and
+         * just return the context to the free pool. obj.getClass().getInterfaces(). We need to find ALL interfaces that
+         * the object (and all superclasses) implement and have the proxy implement them too
+         */
+        Class<?> cls = obj.getClass();
+        Class<?>[] array;
+        List<Class<?>> interfaces = new ArrayList<Class<?>>();
+        while (!cls.equals(Object.class)) {
+            array = cls.getInterfaces();
+            for (Class<?> item : array) {
+                if (!interfaces.contains(item)) {
+                    interfaces.add(item);
+                }
+            }
+            cls = cls.getSuperclass();
+        }
+        array = new Class<?>[interfaces.size()];
+        array = interfaces.toArray(array);
+        return org.onap.ccsdk.sli.core.utils.pool.CachedElement.newInstance(this, obj, array);
+    }
+
+    /**
+     * releases the allocated object back to the free pool to be used by another request.
+     *
+     * @param obj
+     *            The object to be returned to the pool
+     * @throws org.onap.ccsdk.sli.core.utils.pool.PoolDrainedException
+     *             If the caller is trying to release an element to a drained pool
+     */
+    public void release(T obj) throws org.onap.ccsdk.sli.core.utils.pool.PoolDrainedException {
+        if (isDrained()) {
+            throw new org.onap.ccsdk.sli.core.utils.pool.PoolDrainedException("The pool has been drained and cannot be used.");
+        }
+        Lock writeLock = lock.writeLock();
+        writeLock.lock();
+        try {
+            if (allocated.remove(obj)) {
+                free.addFirst(obj);
+            }
+        } finally {
+            writeLock.unlock();
+        }
+    }
+
+    /**
+     * Extend the free pool by some number of elements
+     *
+     * @param count
+     *            The number of elements to add to the pool
+     * @throws org.onap.ccsdk.sli.core.utils.pool.PoolExtensionException
+     *             if the pool cannot be extended because no allocator has been specified.
+     */
+    private void extend(int count) throws org.onap.ccsdk.sli.core.utils.pool.PoolExtensionException {
+        if (allocator == null) {
+            throw new org.onap.ccsdk.sli.core.utils.pool.PoolExtensionException(String.format("Unable to extend pool "
+                                                                              + "because no allocator has been specified"));
+        }
+        Lock writeLock = lock.writeLock();
+        writeLock.lock();
+        try {
+            for (int index = 0; index < count; index++) {
+                T obj = allocator.allocate(this);
+                if (obj == null) {
+                    throw new org.onap.ccsdk.sli.core.utils.pool.PoolExtensionException(
+                        "The allocator failed to allocate a new context to extend the pool.");
+                }
+                free.push(obj);
+            }
+        } finally {
+            writeLock.unlock();
+        }
+    }
+
+    /**
+     * Used to trim the free collection by some specified number of elements, or the free element count, whichever is
+     * less. The elements are removed from the end of the free element deque, thus trimming the oldest elements first.
+     *
+     * @param count
+     *            The number of elements to trim
+     */
+    private void trim(int count) {
+        Lock writeLock = lock.writeLock();
+        writeLock.lock();
+        try {
+            int trimCount = count;
+            if (getFreeSize() < count) {
+                trimCount = getFreeSize();
+            }
+            for (int i = 0; i < trimCount; i++) {
+                T obj = free.removeLast();
+                if (destructor != null) {
+                    destructor.destroy(obj, this);
+                }
+            }
+        } finally {
+            writeLock.unlock();
+        }
+    }
+}
diff --git a/core/utils/provider/src/main/java/org/onap/ccsdk/sli/core/utils/pool/PoolDrainedException.java b/core/utils/provider/src/main/java/org/onap/ccsdk/sli/core/utils/pool/PoolDrainedException.java
new file mode 100644
index 000000000..163298e49
--- /dev/null
+++ b/core/utils/provider/src/main/java/org/onap/ccsdk/sli/core/utils/pool/PoolDrainedException.java
@@ -0,0 +1,48 @@
+/*-
+ * ============LICENSE_START=======================================================
+ * ONAP : APPC
+ * ================================================================================
+ * Copyright (C) 2017-2018 AT&T Intellectual Property. All rights reserved.
+ * ================================================================================
+ * Copyright (C) 2017 Amdocs
+ * =============================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * ============LICENSE_END=========================================================
+ */
+
+package org.onap.ccsdk.sli.core.utils.pool;
+
+/**
+ * This exception is thrown whenever an attempt is made to access a pool of resources where the pool has been drained.
+ * Once drained, the pool is no longer usable.
+ *
+ */
+public class PoolDrainedException extends PoolException {
+
+    /**
+     *
+     */
+    private static final long serialVersionUID = 1L;
+
+    /**
+     * PoolDrainedException constructor
+     *
+     * @param msg
+     *            The error message
+     */
+    public PoolDrainedException(String msg) {
+        super(msg);
+    }
+
+}
diff --git a/core/utils/provider/src/main/java/org/onap/ccsdk/sli/core/utils/pool/PoolException.java b/core/utils/provider/src/main/java/org/onap/ccsdk/sli/core/utils/pool/PoolException.java
new file mode 100644
index 000000000..110d08bba
--- /dev/null
+++ b/core/utils/provider/src/main/java/org/onap/ccsdk/sli/core/utils/pool/PoolException.java
@@ -0,0 +1,89 @@
+/*-
+ * ============LICENSE_START=======================================================
+ * ONAP : APPC
+ * ================================================================================
+ * Copyright (C) 2017-2018 AT&T Intellectual Property. All rights reserved.
+ * ================================================================================
+ * Copyright (C) 2017 Amdocs
+ * =============================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * ============LICENSE_END=========================================================
+ */
+
+package org.onap.ccsdk.sli.core.utils.pool;
+
+/**
+ * A pool exception is a specialization of checked exceptions that define various pool abnormal states or requests.
+ *
+ */
+public class PoolException extends Exception {
+    /**
+     *
+     */
+    private static final long serialVersionUID = 1L;
+
+    /**
+     * PoolException constructor
+     */
+    public PoolException() {
+    }
+
+    /**
+     * PoolException constructor
+     *
+     * @param message
+     *            The error message
+     */
+    public PoolException(String message) {
+        super(message);
+    }
+
+    /**
+     * PoolException constructor
+     *
+     * @param cause
+     *            The cause of the exception
+     */
+    public PoolException(Throwable cause) {
+        super(cause);
+    }
+
+    /**
+     * PoolException constructor
+     *
+     * @param message
+     *            The error message
+     * @param cause
+     *            The cause of the exception
+     */
+    public PoolException(String message, Throwable cause) {
+        super(message, cause);
+    }
+
+    /**
+     * PoolException constructor
+     *
+     * @param message
+     *            The error message
+     * @param cause
+     *            The cause of the exception
+     * @param enableSuppression
+     *            whether or not suppression is enabled or disabled
+     * @param writableStackTrace
+     *            whether or not the stack trace should be writable
+     */
+    public PoolException(String message, Throwable cause, boolean enableSuppression, boolean writableStackTrace) {
+        super(message, cause, enableSuppression, writableStackTrace);
+    }
+}
diff --git a/core/utils/provider/src/main/java/org/onap/ccsdk/sli/core/utils/pool/PoolExtensionException.java b/core/utils/provider/src/main/java/org/onap/ccsdk/sli/core/utils/pool/PoolExtensionException.java
new file mode 100644
index 000000000..c326197fb
--- /dev/null
+++ b/core/utils/provider/src/main/java/org/onap/ccsdk/sli/core/utils/pool/PoolExtensionException.java
@@ -0,0 +1,46 @@
+/*-
+ * ============LICENSE_START=======================================================
+ * ONAP : APPC
+ * ================================================================================
+ * Copyright (C) 2017-2018 AT&T Intellectual Property. All rights reserved.
+ * ================================================================================
+ * Copyright (C) 2017 Amdocs
+ * =============================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * ============LICENSE_END=========================================================
+ */
+
+package org.onap.ccsdk.sli.core.utils.pool;
+
+/**
+ * An error occurred trying to extend the pool
+ *
+ */
+public class PoolExtensionException extends org.onap.ccsdk.sli.core.utils.pool.PoolException {
+
+    /**
+     *
+     */
+    private static final long serialVersionUID = 1L;
+
+    /**
+     * PoolExtensionException constructor
+     *
+     * @param msg
+     *            The error message
+     */
+    public PoolExtensionException(String msg) {
+        super(msg);
+    }
+}
diff --git a/core/utils/provider/src/main/java/org/onap/ccsdk/sli/core/utils/pool/PoolSpecificationException.java b/core/utils/provider/src/main/java/org/onap/ccsdk/sli/core/utils/pool/PoolSpecificationException.java
new file mode 100644
index 000000000..3bc5f51e6
--- /dev/null
+++ b/core/utils/provider/src/main/java/org/onap/ccsdk/sli/core/utils/pool/PoolSpecificationException.java
@@ -0,0 +1,47 @@
+/*-
+ * ============LICENSE_START=======================================================
+ * ONAP : APPC
+ * ================================================================================
+ * Copyright (C) 2017-2018 AT&T Intellectual Property. All rights reserved.
+ * ================================================================================
+ * Copyright (C) 2017 Amdocs
+ * =============================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * ============LICENSE_END=========================================================
+ */
+
+package org.onap.ccsdk.sli.core.utils.pool;
+
+/**
+ * This exception is thrown whenever the pool is not specified correctly
+ *
+ */
+public class PoolSpecificationException extends org.onap.ccsdk.sli.core.utils.pool.PoolException {
+
+    /**
+     *
+     */
+    private static final long serialVersionUID = 1L;
+
+    /**
+     * PoolSpecificationException constructor
+     *
+     * @param msg
+     *            The error message
+     */
+    public PoolSpecificationException(String msg) {
+        super(msg);
+    }
+
+}
diff --git a/core/utils/provider/src/test/java/org/onap/ccsdk/sli/core/utils/logging/LoggingConstantsTest.java b/core/utils/provider/src/test/java/org/onap/ccsdk/sli/core/utils/logging/LoggingConstantsTest.java
new file mode 100644
index 000000000..e8767a550
--- /dev/null
+++ b/core/utils/provider/src/test/java/org/onap/ccsdk/sli/core/utils/logging/LoggingConstantsTest.java
@@ -0,0 +1,59 @@
+/*-
+ * ============LICENSE_START=======================================================
+ * ONAP : APPC
+ * ================================================================================
+ * Copyright (C) 2017-2018 AT&T Intellectual Property. All rights reserved.
+ * ================================================================================
+ * Copyright (C) 2017 Amdocs
+ * =============================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * ============LICENSE_END=========================================================
+ */
+
+package org.onap.ccsdk.sli.core.utils.logging;
+
+import org.junit.Test;
+import org.powermock.reflect.Whitebox;
+
+public class LoggingConstantsTest {
+    @Test (expected = IllegalAccessError.class)
+    public void testConstructor() throws Exception {
+        Whitebox.invokeConstructor(LoggingConstants.class);
+    }
+
+    @Test (expected = IllegalAccessError.class)
+    public void testMdcKeysConstructor() throws Exception {
+        Whitebox.invokeConstructor(LoggingConstants.MDCKeys.class);
+    }
+
+    @Test (expected = IllegalAccessError.class)
+    public void testStatusCodesConstructor() throws Exception {
+        Whitebox.invokeConstructor(LoggingConstants.StatusCodes.class);
+    }
+
+    @Test (expected = IllegalAccessError.class)
+    public void testTargetNamesConstructor() throws Exception {
+        Whitebox.invokeConstructor(LoggingConstants.TargetNames.class);
+    }
+
+    @Test (expected = IllegalAccessError.class)
+    public void testTargetServiceNamesConstructor() throws Exception {
+        Whitebox.invokeConstructor(LoggingConstants.TargetServiceNames.class);
+    }
+
+    @Test (expected = IllegalAccessError.class)
+    public void testAAIServiceNamesConstructor() throws Exception {
+        Whitebox.invokeConstructor(LoggingConstants.TargetServiceNames.AAIServiceNames.class);
+    }
+}
diff --git a/core/utils/provider/src/test/java/org/onap/ccsdk/sli/core/utils/logging/LoggingUtilsTest.java b/core/utils/provider/src/test/java/org/onap/ccsdk/sli/core/utils/logging/LoggingUtilsTest.java
new file mode 100644
index 000000000..3c1708b42
--- /dev/null
+++ b/core/utils/provider/src/test/java/org/onap/ccsdk/sli/core/utils/logging/LoggingUtilsTest.java
@@ -0,0 +1,357 @@
+/*-
+ * ============LICENSE_START=======================================================
+ * ONAP : APPC
+ * ================================================================================
+ * Copyright (C) 2018 AT&T Intellectual Property. All rights reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * ============LICENSE_END=========================================================
+ */
+
+package org.onap.ccsdk.sli.core.utils.logging;
+
+import com.att.eelf.configuration.EELFLogger;
+import com.att.eelf.configuration.EELFManager;
+import java.lang.reflect.Method;
+import java.time.Instant;
+import org.junit.Test;
+import org.powermock.reflect.Whitebox;
+import org.slf4j.MDC;
+
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertNotNull;
+import static org.junit.Assert.assertNull;
+import static org.junit.Assert.fail;
+
+public class LoggingUtilsTest {
+    @Test(expected = IllegalAccessError.class)
+    public void testConstructor() throws Exception {
+        Whitebox.invokeConstructor(LoggingUtils.class);
+    }
+
+    @Test
+    public void testLogErrorMessageStringStringStringStringStringString() {
+        try {
+            LoggingUtils.logErrorMessage("ERROR_CODE", "ERROR_DESCRIPTION", "TARGET_ENTITY", "TARGET_SERVICE_NAME", "ADDITIONAL_MESSAGE", "CLASS_NAME");
+            assertNull(MDC.get(LoggingConstants.MDCKeys.CLASS_NAME));
+        } catch (Exception e) {
+            fail("Exception invoking logErrorMessage: " + e.toString());
+        }
+    }
+
+    @Test
+    public void testLogErrorMessageStringStringStringString() {
+        try {
+            LoggingUtils.logErrorMessage("TARGET_ENTITY", "TARGET_SERVICE_NAME", "ADDITIONAL_MESSAGE", "CLASS_NAME");
+            assertNull(MDC.get(LoggingConstants.MDCKeys.CLASS_NAME));
+        } catch (Exception e) {
+            fail("Exception invoking logErrorMessage: " + e.toString());
+        }
+        }
+
+    @Test
+    public void testLogErrorMessageStringStringString() {
+        try {
+            LoggingUtils.logErrorMessage("TARGET_SERVICE_NAME", "ADDITIONAL_MESSAGE", "CLASS_NAME");
+            assertNull(MDC.get(LoggingConstants.MDCKeys.CLASS_NAME));
+        } catch (Exception e) {
+            fail("Exception invoking logErrorMessage: " + e.toString());
+        }
+    }
+
+    @Test
+    public void testLogError() {
+        try {
+            Class<?>[] paramString = { String.class, String.class, String.class, String.class, String.class, String.class };
+            Method m = LoggingUtils.class.getDeclaredMethod("logError", paramString);
+            m.setAccessible(true);
+            m.invoke(null, "ERROR_CODE", "ERROR_DESCRIPTION", "TARGET_ENTITY", "TARGET_SERVICE_NAME", "ADDITIONAL_MESSAGE", "CLASS_NAME");
+            assertNull(MDC.get(LoggingConstants.MDCKeys.CLASS_NAME));
+        } catch (Exception e) {
+            fail("Exception invoking logError: " + e.toString());
+        }
+    }
+
+    @Test
+    public void testLogAuditMessage() {
+        try {
+            Class<?>[] paramString = { Instant.class, Instant.class, String.class, String.class, String.class };
+            Method m = LoggingUtils.class.getDeclaredMethod("logAuditMessage", paramString);
+            m.setAccessible(true);
+            java.util.Date timestamp = new java.util.Date();
+            m.invoke(null, timestamp.toInstant(), timestamp.toInstant(), "CODE", "RESPONSE_DESCRIPTION", "CLASS_NAME");
+            assertNull(MDC.get(LoggingConstants.MDCKeys.CLASS_NAME));
+        } catch (Exception e) {
+            fail("Exception invoking logAuditMessage: " + e.toString());
+        }
+    }
+
+    @Test
+    public void testAuditInfo() {
+        try {
+            EELFLogger auditLogger = EELFManager.getInstance().getAuditLogger();
+            auditLogger.info("Audit logging test info");
+        } catch (Exception e) {
+            fail("Exception invoking testAuditInfo: " + e.toString());
+        }
+    }
+
+    @Test
+    public void testAuditWarn() {
+        try {
+            EELFLogger auditLogger = EELFManager.getInstance().getAuditLogger();
+            auditLogger.warn("Audit logging test warning");
+        } catch (Exception e) {
+            fail("Exception invoking testAuditWarn: " + e.toString());
+        }
+    }
+
+    @Test
+    public void testLogMetricsMessage() {
+        try {
+            java.util.Date timestamp = new java.util.Date();
+            LoggingUtils.logMetricsMessage(timestamp.toInstant(), timestamp.toInstant(), "TARGET_ENTITY", "TARGET_SERVICE_NAME", "STATUS_CODE", "RESPONSE_CODE", "RESPONSE_DESCRIPTION", "CLASS_NAME");
+            assertNull(MDC.get(LoggingConstants.MDCKeys.STATUS_CODE));
+
+        } catch (Exception e) {
+            fail("Exception invoking logMetricsMessage: " + e.toString());
+        }
+    }
+
+    @Test
+    public void testPopulateAuditLogContext() {
+        try {
+            Class<?>[] paramString = { Instant.class, Instant.class, String.class, String.class, String.class };
+            Method m = LoggingUtils.class.getDeclaredMethod("populateAuditLogContext", paramString);
+            m.setAccessible(true);
+            java.util.Date timestamp = new java.util.Date();
+            m.invoke(null, timestamp.toInstant(), timestamp.toInstant(), "100", "RESPONSE_DESCRIPTION", "CLASS_NAME");
+            assertEquals("COMPLETE", MDC.get(LoggingConstants.MDCKeys.STATUS_CODE));
+            assertEquals("100", MDC.get(LoggingConstants.MDCKeys.RESPONSE_CODE));
+            assertEquals("RESPONSE_DESCRIPTION", MDC.get(LoggingConstants.MDCKeys.RESPONSE_DESCRIPTION));
+        } catch (Exception e) {
+            fail("Exception invoking populateAuditLogContext: " + e.toString());
+        }
+    }
+
+    @Test
+    public void testCleanAuditErrorContext() {
+        try {
+            Method m = LoggingUtils.class.getDeclaredMethod("cleanAuditErrorContext");
+            m.setAccessible(true);
+            MDC.put(LoggingConstants.MDCKeys.STATUS_CODE, "STATUS_CODE");
+            MDC.put(LoggingConstants.MDCKeys.RESPONSE_CODE, "RESPONSE_CODE");
+            MDC.put(LoggingConstants.MDCKeys.RESPONSE_DESCRIPTION, "RESPONSE_DESCRIPTION");
+            MDC.put(LoggingConstants.MDCKeys.CLASS_NAME, "CLASS_NAME");
+            m.invoke(null);
+            assertNull(MDC.get(LoggingConstants.MDCKeys.STATUS_CODE));
+            assertNull(MDC.get(LoggingConstants.MDCKeys.RESPONSE_CODE));
+            assertNull(MDC.get(LoggingConstants.MDCKeys.RESPONSE_DESCRIPTION));
+            assertNull(MDC.get(LoggingConstants.MDCKeys.CLASS_NAME));
+        } catch (Exception e) {
+            fail("Exception invoking cleanAuditErrorLogContext: " + e.toString());
+        }
+    }
+
+    @Test
+    public void testPopulateErrorLogContext() {
+        try {
+            Class<?>[] paramString = { String.class, String.class, String.class, String.class, String.class };
+            Method m = LoggingUtils.class.getDeclaredMethod("populateErrorLogContext", paramString);
+            m.setAccessible(true);
+            m.invoke(null, "ERROR_CODE", "ERROR_DESCRIPTION", "TARGET_ENTITY", "TARGET_SERVICENAME", "CLASS_NAME");
+            assertEquals("CLASS_NAME", MDC.get(LoggingConstants.MDCKeys.CLASS_NAME));
+        } catch (Exception e) {
+            fail("Exception invoking populateErrorLogContext: " + e.toString());
+        }
+    }
+
+    @Test
+    public void testCleanErrorLogContext() {
+        try {
+            Method m = LoggingUtils.class.getDeclaredMethod("cleanErrorLogContext");
+            m.setAccessible(true);
+            MDC.put(LoggingConstants.MDCKeys.CLASS_NAME, "CLASS_NAME");
+            m.invoke(null);
+            assertNull(MDC.get(LoggingConstants.MDCKeys.CLASS_NAME));
+        } catch (Exception e) {
+            fail("Exception invoking cleanErrorLogContext: " + e.toString());
+        }
+    }
+
+    @Test
+    public void testPopulateMetricLogContext() {
+        try {
+            Class<?>[] paramString = { Instant.class, Instant.class, String.class, String.class, String.class,
+                    String.class, String.class, String.class };
+            Method m = LoggingUtils.class.getDeclaredMethod("populateMetricLogContext", paramString);
+            m.setAccessible(true);
+            java.util.Date timestamp = new java.util.Date();
+            m.invoke(null, timestamp.toInstant(), timestamp.toInstant(), "TARGET_ENTITY", "TARGET_SERVICE_NAME", "STATUS_CODE", "RESPONSE_CODE", "RESPONSE_DESCRIPTION", "CLASS_NAME");
+            assertEquals("STATUS_CODE", MDC.get(LoggingConstants.MDCKeys.STATUS_CODE));
+            assertEquals("RESPONSE_CODE", MDC.get(LoggingConstants.MDCKeys.RESPONSE_CODE));
+            assertEquals("RESPONSE_DESCRIPTION", MDC.get(LoggingConstants.MDCKeys.RESPONSE_DESCRIPTION));
+        } catch (Exception e) {
+            fail("Exception invoking populateMetricLogContext: " + e.toString());
+        }
+    }
+
+    @Test
+    public void testCleanMetricContext() {
+        try {
+            Method m = LoggingUtils.class.getDeclaredMethod("cleanMetricContext");
+            m.setAccessible(true);
+            MDC.put(LoggingConstants.MDCKeys.CLASS_NAME, "CLASS_NAME");
+            m.invoke(null);
+            assertNull(MDC.get(LoggingConstants.MDCKeys.CLASS_NAME));
+        } catch (Exception e) {
+            fail("Exception invoking cleanMetricContext: " + e.toString());
+        }
+    }
+
+    @Test
+    public void testPopulateTargetContext() {
+        try {
+            Class<?>[] paramString = { String.class, String.class };
+            Method m = LoggingUtils.class.getDeclaredMethod("populateTargetContext", paramString);
+            m.setAccessible(true);
+            m.invoke(null, "TARGET_ENTITY", "TARGET_SERVICE_NAME");
+            assertEquals("TARGET_ENTITY", MDC.get(LoggingConstants.MDCKeys.TARGET_ENTITY));
+            assertEquals("TARGET_SERVICE_NAME", MDC.get(LoggingConstants.MDCKeys.TARGET_SERVICE_NAME));
+        } catch (Exception e) {
+            fail("Exception invoking populateTargetContext: " + e.toString());
+        }
+    }
+
+    @Test
+    public void testCleanTargetContext() {
+        try {
+            Method m = LoggingUtils.class.getDeclaredMethod("cleanTargetContext");
+            m.setAccessible(true);
+            MDC.put(LoggingConstants.MDCKeys.TARGET_ENTITY, "TARGET_ENTITY");
+            MDC.put(LoggingConstants.MDCKeys.TARGET_SERVICE_NAME, "TARGET_SERVICE_NAME");
+            m.invoke(null);
+            assertNull(MDC.get(LoggingConstants.MDCKeys.TARGET_ENTITY));
+            assertNull(MDC.get(LoggingConstants.MDCKeys.TARGET_SERVICE_NAME));
+        } catch (Exception e) {
+            fail("Exception invoking cleanTargetContext: " + e.toString());
+        }
+    }
+
+    @Test
+    public void testPopulateTimeContext() {
+        try {
+            Class<?>[] paramString = { Instant.class, Instant.class };
+            Method m = LoggingUtils.class.getDeclaredMethod("populateTimeContext", paramString);
+            m.setAccessible(true);
+            java.util.Date timestamp = new java.util.Date();
+            m.invoke(null, timestamp.toInstant(), timestamp.toInstant());
+        } catch (Exception e) {
+            fail("Exception invoking populateTimeContext: " + e.toString());
+        }
+    }
+
+    @Test
+    public void testGenerateTimestampStr() {
+        try {
+            Class<?>[] paramString = { Instant.class };
+            Method m = LoggingUtils.class.getDeclaredMethod("generateTimestampStr", paramString);
+            m.setAccessible(true);
+            java.util.Date timestamp = new java.util.Date();
+            assertNotNull((String) m.invoke(null, timestamp.toInstant()));
+        } catch (Exception e) {
+            fail("Exception invoking testGenerateTimestampStr: " + e.toString());
+        }
+
+    }
+
+    @Test
+    public void testCleanTimeContext() {
+        try {
+            Method m = LoggingUtils.class.getDeclaredMethod("cleanTimeContext");
+            m.setAccessible(true);
+            MDC.put(LoggingConstants.MDCKeys.BEGIN_TIMESTAMP, "BEGIN_TIMESTAMP");
+            MDC.put(LoggingConstants.MDCKeys.END_TIMESTAMP, "END_TIMESTAMP");
+            MDC.put(LoggingConstants.MDCKeys.ELAPSED_TIME, "ELAPSED_TIME");
+            m.invoke(null);
+            assertNull(MDC.get(LoggingConstants.MDCKeys.BEGIN_TIMESTAMP));
+            assertNull(MDC.get(LoggingConstants.MDCKeys.END_TIMESTAMP));
+            assertNull(MDC.get(LoggingConstants.MDCKeys.ELAPSED_TIME));
+        } catch (Exception e) {
+            fail("Exception invoking cleanErrorContext: " + e.toString());
+        }
+    }
+
+    @Test
+    public void testPopulateResponseContext() {
+        try {
+            Class<?>[] paramString = { String.class, String.class, String.class };
+            Method m = LoggingUtils.class.getDeclaredMethod("populateResponseContext", paramString);
+            m.setAccessible(true);
+            m.invoke(null, "STATUS_CODE", "RESPONSE_CODE", "RESPONSE_DESCRIPTION");
+            assertEquals("STATUS_CODE", MDC.get(LoggingConstants.MDCKeys.STATUS_CODE));
+            assertEquals("RESPONSE_CODE", MDC.get(LoggingConstants.MDCKeys.RESPONSE_CODE));
+            assertEquals("RESPONSE_DESCRIPTION", MDC.get(LoggingConstants.MDCKeys.RESPONSE_DESCRIPTION));
+        } catch (Exception e) {
+            fail("Exception invoking populateResponseContext: " + e.toString());
+        }
+    }
+
+    @Test
+    public void testCleanResponseContext() {
+        try {
+            Method m = LoggingUtils.class.getDeclaredMethod("cleanResponseContext");
+            m.setAccessible(true);
+            MDC.put(LoggingConstants.MDCKeys.STATUS_CODE, "STATUS_CODE");
+            MDC.put(LoggingConstants.MDCKeys.RESPONSE_CODE, "RESPONSE_CODE");
+            MDC.put(LoggingConstants.MDCKeys.RESPONSE_DESCRIPTION, "RESPONSE_DESCRIPTION");
+            m.invoke(null);
+            assertNull(MDC.get(LoggingConstants.MDCKeys.STATUS_CODE));
+            assertNull(MDC.get(LoggingConstants.MDCKeys.RESPONSE_CODE));
+            assertNull(MDC.get(LoggingConstants.MDCKeys.RESPONSE_DESCRIPTION));
+        } catch (Exception e) {
+            fail("Exception invoking cleanErrorContext: " + e.toString());
+        }
+    }
+
+    @Test
+    public void testPopulateErrorContext() {
+        try {
+            Class<?>[] paramString = { String.class, String.class };
+            Method m = LoggingUtils.class.getDeclaredMethod("populateErrorContext", paramString);
+            m.setAccessible(true);
+            m.invoke(null, "ERROR_CODE", "ERROR_DESCRIPTION");
+            //assertEquals("900", MDC.get(LoggingConstants.MDCKeys.ERROR_CODE));
+            assertEquals("ERROR_DESCRIPTION", MDC.get(LoggingConstants.MDCKeys.ERROR_DESCRIPTION));
+        } catch (Exception e) {
+            fail("Exception invoking populateErrorContext: " + e.toString());
+        }
+    }
+
+    @Test
+    public void testCleanErrorContext() {
+        try {
+            Method m = LoggingUtils.class.getDeclaredMethod("cleanErrorContext");
+            m.setAccessible(true);
+            MDC.put(LoggingConstants.MDCKeys.ERROR_CODE, "ERROR_CODE");
+            MDC.put(LoggingConstants.MDCKeys.ERROR_DESCRIPTION, "ERROR_DESCRIPTION");
+            m.invoke(null);
+            assertNull(MDC.get(LoggingConstants.MDCKeys.ERROR_CODE));
+            assertNull(MDC.get(LoggingConstants.MDCKeys.ERROR_DESCRIPTION));
+        } catch (Exception e) {
+            fail("Exception invoking cleanErrorContext: " + e.toString());
+        }
+    }
+
+}
diff --git a/core/utils/provider/src/test/java/org/onap/ccsdk/sli/core/utils/pool/CachedElementTest.java b/core/utils/provider/src/test/java/org/onap/ccsdk/sli/core/utils/pool/CachedElementTest.java
new file mode 100644
index 000000000..60fd6f570
--- /dev/null
+++ b/core/utils/provider/src/test/java/org/onap/ccsdk/sli/core/utils/pool/CachedElementTest.java
@@ -0,0 +1,285 @@
+/*-
+ * ============LICENSE_START=======================================================
+ * ONAP : APPC
+ * ================================================================================
+ * Copyright (C) 2017-2018 AT&T Intellectual Property. All rights reserved.
+ * ================================================================================
+ * Copyright (C) 2017 Amdocs
+ * =============================================================================
+ * Modifications Copyright (C) 2019 IBM
+ * =============================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * ============LICENSE_END=========================================================
+ */
+
+
+
+package org.onap.ccsdk.sli.core.utils.pool;
+
+import java.io.IOException;
+import java.lang.reflect.InvocationTargetException;
+import java.lang.reflect.Method;
+import org.junit.Before;
+import org.junit.Test;
+
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertFalse;
+import static org.junit.Assert.assertNotNull;
+import static org.junit.Assert.assertNull;
+import static org.junit.Assert.assertSame;
+import static org.junit.Assert.assertTrue;
+
+public class CachedElementTest implements Allocator<Testable>, Destructor<Testable> {
+    private static final int MIN = 10;
+    private static final int MAX = 100;
+    private Pool<Testable> pool;
+    private int index = 0;
+    private int destroyCount = 0;
+
+    /**
+     * setup
+     *
+     * @throws PoolSpecificationException
+     *             If the minimum size is less than 0, or if the max size is non-zero and less than the min size.
+     */
+    @Before
+    public void setup() throws PoolSpecificationException {
+        pool = new Pool<>(MIN, MAX);
+    }
+
+    /**
+     * Test state
+     */
+    @Test
+    public void testAllocator() {
+        assertNull(pool.getAllocator());
+        pool.setAllocator(this);
+        assertNotNull(pool.getAllocator());
+    }
+
+    /**
+     * Test state
+     */
+    @Test
+    public void testDestructor() {
+        assertNull(pool.getDestructor());
+        pool.setDestructor(this);
+        assertNotNull(pool.getDestructor());
+    }
+
+    /**
+     * Test that we can allocate and release elements and that the pool maintains them in MRU order
+     *
+     * @throws PoolExtensionException
+     *             If the pool cannot be extended
+     * @throws PoolDrainedException
+     *             If the caller is trying to reserve an element from a drained pool
+     */
+    @Test
+    public void testAllocateAndRelease() throws PoolExtensionException, PoolDrainedException {
+        pool.setAllocator(this);
+
+        assertFalse(pool.isDrained());
+
+        /*
+         * Allocate three elements
+         */
+        Testable value1 = pool.reserve();
+        assertNotNull(value1);
+        assertEquals(Integer.valueOf(MIN - 1), Integer.valueOf(value1.getId()));
+        assertEquals(1, pool.getAllocatedSize());
+        assertEquals(MIN - 1, pool.getFreeSize());
+        assertEquals(1, pool.getAllocatedSize());
+
+        Testable value2 = pool.reserve();
+        assertNotNull(value2);
+        assertEquals(Integer.valueOf(MIN - 2), Integer.valueOf(value2.getId()));
+        assertEquals(2, pool.getAllocatedSize());
+        assertEquals(MIN - 2, pool.getFreeSize());
+        assertEquals(2, pool.getAllocatedSize());
+
+        Testable value3 = pool.reserve();
+        assertNotNull(value3);
+        assertEquals(Integer.valueOf(MIN - 3), Integer.valueOf(value3.getId()));
+        assertEquals(3, pool.getAllocatedSize());
+        assertEquals(MIN - 3, pool.getFreeSize());
+        assertEquals(3, pool.getAllocatedSize());
+
+        /*
+         * Now, release them in the order obtained
+         */
+        pool.release(value1);
+        pool.release(value2);
+        pool.release(value3);
+
+        assertEquals(0, pool.getAllocatedSize());
+        assertEquals(MIN, pool.getFreeSize());
+
+        /*
+         * Now, allocate them again, but their values should be reversed (3, 2, 1) representing the most recently used
+         * to the least recently used.
+         */
+        value1 = pool.reserve();
+        assertNotNull(value1);
+        assertEquals(Integer.valueOf(MIN - 3), Integer.valueOf(value1.getId()));
+
+        value2 = pool.reserve();
+        assertNotNull(value2);
+        assertEquals(Integer.valueOf(MIN - 2), Integer.valueOf(value2.getId()));
+
+        value3 = pool.reserve();
+        assertNotNull(value3);
+        assertEquals(Integer.valueOf(MIN - 1), Integer.valueOf(value3.getId()));
+    }
+
+    /**
+     * Test that we can trim the pool to a desired size
+     *
+     * @throws PoolDrainedException
+     *             If the caller is trying to release or reserve an element from a drained pool
+     * @throws PoolExtensionException
+     *             If the pool cannot be extended
+     * @throws IllegalAccessException
+     *             if this Method object is enforcing Java language access control and the underlying method is
+     *             inaccessible.
+     * @throws IllegalArgumentException
+     *             if the method is an instance method and the specified object argument is not an instance of the class
+     *             or interface declaring the underlying method (or of a subclass or implementor thereof); if the number
+     *             of actual and formal parameters differ; if an unwrapping conversion for primitive arguments fails; or
+     *             if, after possible unwrapping, a parameter value cannot be converted to the corresponding formal
+     *             parameter type by a method invocation conversion.
+     * @throws InvocationTargetException
+     *             if the underlying method throws an exception.
+     * @throws SecurityException
+     *             If a security manager, s, is present and any of the following conditions is met:
+     *             <ul>
+     *             <li>invocation of s.checkMemberAccess(this, Member.DECLARED) denies access to the declared method</li>
+     *             <li>the caller's class loader is not the same as or an ancestor of the class loader for the current
+     *             class and invocation of s.checkPackageAccess() denies access to the package of this class</li>
+     *             </ul>
+     * @throws NoSuchMethodException
+     *             if a matching method is not found.
+     */
+    @SuppressWarnings("nls")
+    @Test
+    public void testTrim() throws IllegalAccessException, IllegalArgumentException, InvocationTargetException,
+        PoolDrainedException, PoolExtensionException, NoSuchMethodException, SecurityException {
+
+        pool.setAllocator(this);
+        int SIZE = 50;
+        Testable[] array = new Testable[SIZE];
+
+        assertEquals(0, pool.getAllocatedSize());
+        for (int i = 0; i < SIZE; i++) {
+            array[i] = pool.reserve();
+        }
+        assertEquals(SIZE, pool.getAllocatedSize());
+
+        for (int i = 0; i < SIZE; i++) {
+            pool.release(array[i]);
+        }
+        assertEquals(0, pool.getAllocatedSize());
+
+        assertEquals(SIZE, pool.getFreeSize());
+
+        Method trimMethod = Pool.class.getDeclaredMethod("trim", new Class[] {
+            Integer.TYPE
+        });
+        trimMethod.setAccessible(true);
+        trimMethod.invoke(pool, new Object[] {
+            SIZE - MIN
+        });
+
+        assertEquals(MIN, pool.getFreeSize());
+    }
+
+    /**
+     * Test that we can drain a pool containing a mix of free and allocated elements
+     *
+     * @throws PoolDrainedException
+     *             If the caller is trying to release or reserve an element from a drained pool
+     * @throws PoolExtensionException
+     *             If the pool cannot be extended
+     * @throws IOException
+     *             if an I/O error occurs
+     */
+    @Test
+    public void testDrain() throws PoolExtensionException, PoolDrainedException, IOException {
+        int SIZE = 50;
+        int FREE = 20;
+        int ALLOC = SIZE - FREE;
+
+        Testable[] array = new Testable[SIZE];
+        pool.setAllocator(this);
+        pool.setDestructor(this);
+
+        assertFalse(pool.isDrained());
+
+        assertEquals(0, pool.getAllocatedSize());
+        for (int i = 0; i < SIZE; i++) {
+            array[i] = pool.reserve();
+        }
+        assertEquals(SIZE, pool.getAllocatedSize());
+
+        for (int i = 0; i < FREE; i++) {
+            array[i].close();
+        }
+        assertEquals(ALLOC, pool.getAllocatedSize());
+        assertEquals(FREE, pool.getFreeSize());
+
+        pool.drain();
+        assertEquals(0, pool.getFreeSize());
+        assertEquals(0, pool.getAllocatedSize());
+        assertTrue(pool.isDrained());
+
+        assertEquals(SIZE, destroyCount);
+    }
+
+    /**
+     * @see org.onap.ccsdk.sli.core.utils.pool.Allocator#allocate(org.onap.ccsdk.sli.core.utils.pool.Pool)
+     */
+    @Override
+    public Testable allocate(Pool<Testable> pool) {
+        Testable element = new org.onap.ccsdk.sli.core.utils.pool.Element(index++);
+        Testable ce = CachedElement.newInstance(pool, element, new Class[] {
+            Testable.class
+        });
+        return ce;
+    }
+
+    /**
+     * @see org.onap.ccsdk.sli.core.utils.pool.Destructor#destroy(java.io.Closeable, org.onap.ccsdk.sli.core.utils.pool.Pool)
+     */
+    @Override
+    public void destroy(Testable obj, Pool<Testable> pool) {
+        destroyCount++;
+    }
+
+    @Test
+    public void testGetWrappedObject()
+    {
+        Testable element = new org.onap.ccsdk.sli.core.utils.pool.Element(index++);
+        CachedElement cachedElement = new CachedElement(pool, element);
+        assertNotNull(cachedElement.getWrappedObject());
+        assertSame(element, cachedElement.getWrappedObject());
+    }
+
+    @Test
+    public void testToString()
+    {
+        Testable element = new org.onap.ccsdk.sli.core.utils.pool.Element(index++);
+        CachedElement cachedElement = new CachedElement(pool, element);
+        assertTrue(cachedElement.toString() instanceof String);
+    }
+}
diff --git a/core/utils/provider/src/test/java/org/onap/ccsdk/sli/core/utils/pool/Element.java b/core/utils/provider/src/test/java/org/onap/ccsdk/sli/core/utils/pool/Element.java
new file mode 100644
index 000000000..288a5ffbd
--- /dev/null
+++ b/core/utils/provider/src/test/java/org/onap/ccsdk/sli/core/utils/pool/Element.java
@@ -0,0 +1,77 @@
+/*-
+ * ============LICENSE_START=======================================================
+ * ONAP : APPC
+ * ================================================================================
+ * Copyright (C) 2017-2018 AT&T Intellectual Property. All rights reserved.
+ * ================================================================================
+ * Copyright (C) 2017 Amdocs
+ * =============================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * ============LICENSE_END=========================================================
+ */
+
+
+
+package org.onap.ccsdk.sli.core.utils.pool;
+
+import java.io.IOException;
+
+public class Element implements Testable {
+    private boolean closed;
+    private Integer id;
+
+    public Element(int id) {
+        this.id = Integer.valueOf(id);
+        closed = false;
+    }
+
+    @Override
+    public boolean equals(Object obj) {
+        boolean result = false;
+        if (obj instanceof Element) {
+            Element other = (Element) obj;
+            result = this.id.equals(other.id);
+        }
+
+        return result;
+    }
+
+    @Override
+    public int hashCode() {
+        return id.hashCode();
+    }
+
+    /**
+     * @see java.io.Closeable#close()
+     */
+    @Override
+    public void close() throws IOException {
+        closed = true;
+    }
+
+    @Override
+    public Boolean isClosed() {
+        return Boolean.valueOf(closed);
+    }
+
+    @Override
+    public String toString() {
+        return Integer.toString(id);
+    }
+
+    @Override
+    public Integer getId() {
+        return id;
+    }
+}
diff --git a/core/utils/provider/src/test/java/org/onap/ccsdk/sli/core/utils/pool/PoolDrainedExceptionTest.java b/core/utils/provider/src/test/java/org/onap/ccsdk/sli/core/utils/pool/PoolDrainedExceptionTest.java
new file mode 100644
index 000000000..30907f995
--- /dev/null
+++ b/core/utils/provider/src/test/java/org/onap/ccsdk/sli/core/utils/pool/PoolDrainedExceptionTest.java
@@ -0,0 +1,35 @@
+/*-

+* ============LICENSE_START=======================================================

+* ONAP : APPC

+* ================================================================================

+* Copyright (C) 2018 AT&T Intellectual Property. All rights reserved.

+* =============================================================================

+* Licensed under the Apache License, Version 2.0 (the "License");

+* you may not use this file except in compliance with the License.

+* You may obtain a copy of the License at

+*

+*      http://www.apache.org/licenses/LICENSE-2.0

+*

+* Unless required by applicable law or agreed to in writing, software

+* distributed under the License is distributed on an "AS IS" BASIS,

+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

+* See the License for the specific language governing permissions and

+* limitations under the License.

+* ============LICENSE_END=========================================================

+*/

+package org.onap.ccsdk.sli.core.utils.pool;

+

+import org.junit.Assert;

+import org.junit.Test;

+

+public class PoolDrainedExceptionTest {

+

+    @Test

+    public void testPoolDrainedException() {

+        String message = "test message";

+        PoolDrainedException poolDrainedExp = new PoolDrainedException(message);

+        Assert.assertEquals(message, poolDrainedExp.getMessage());

+        Assert.assertEquals(message, poolDrainedExp.getLocalizedMessage());

+    }

+

+}

diff --git a/core/utils/provider/src/test/java/org/onap/ccsdk/sli/core/utils/pool/PoolExceptionTest.java b/core/utils/provider/src/test/java/org/onap/ccsdk/sli/core/utils/pool/PoolExceptionTest.java
new file mode 100644
index 000000000..9716d5813
--- /dev/null
+++ b/core/utils/provider/src/test/java/org/onap/ccsdk/sli/core/utils/pool/PoolExceptionTest.java
@@ -0,0 +1,72 @@
+/*-

+* ============LICENSE_START=======================================================

+* ONAP : APPC

+* ================================================================================

+* Copyright (C) 2018 AT&T Intellectual Property. All rights reserved.

+* =============================================================================

+* Licensed under the Apache License, Version 2.0 (the "License");

+* you may not use this file except in compliance with the License.

+* You may obtain a copy of the License at

+*

+*      http://www.apache.org/licenses/LICENSE-2.0

+*

+* Unless required by applicable law or agreed to in writing, software

+* distributed under the License is distributed on an "AS IS" BASIS,

+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

+* See the License for the specific language governing permissions and

+* limitations under the License.

+* ============LICENSE_END=========================================================

+*/

+package org.onap.ccsdk.sli.core.utils.pool;

+

+import org.junit.Assert;

+import org.junit.Test;

+

+public class PoolExceptionTest {

+

+    @Test

+    public void testPoolException() {

+        PoolException poolException = new PoolException();

+        Assert.assertTrue(poolException.getCause() == null);

+        Assert.assertTrue(poolException.getMessage() == null);

+    }

+

+    @Test

+    public void testPoolExceptionString() {

+        String message = "test message";

+        PoolException poolException = new PoolException(message);

+        Assert.assertEquals(message, poolException.getMessage());

+        Assert.assertEquals(message, poolException.getLocalizedMessage());

+    }

+

+    @Test

+    public void testPoolExceptionThrowable() {

+        String tMessage = "throwable message";

+        Throwable throwable = new Throwable(tMessage);

+        PoolException poolException = new PoolException(throwable);

+        Assert.assertEquals(throwable, poolException.getCause());

+    }

+

+    @Test

+    public void testPoolExceptionStringThrowable() {

+        String message = "my test message";

+        String tMessage = "throwable message";

+        Throwable throwable = new Throwable(tMessage);

+        PoolException poolException = new PoolException(message, throwable);

+        Assert.assertEquals(throwable, poolException.getCause());

+        Assert.assertTrue(poolException.getMessage().contains(message));

+        Assert.assertEquals(message, poolException.getLocalizedMessage());

+    }

+

+    @Test

+    public void testPoolExceptionStringThrowableBooleanBoolean() {

+        String message = "my test message";

+        String tMessage = "throwable message";

+        Throwable throwable = new Throwable(tMessage);

+        PoolException poolException = new PoolException(message, throwable, true, true);

+        Assert.assertEquals(throwable, poolException.getCause());

+        Assert.assertTrue(poolException.getMessage().contains(message));

+        Assert.assertEquals(message, poolException.getLocalizedMessage());

+    }

+

+}

diff --git a/core/utils/provider/src/test/java/org/onap/ccsdk/sli/core/utils/pool/PoolExtensionExceptionTest.java b/core/utils/provider/src/test/java/org/onap/ccsdk/sli/core/utils/pool/PoolExtensionExceptionTest.java
new file mode 100644
index 000000000..f972a7d4b
--- /dev/null
+++ b/core/utils/provider/src/test/java/org/onap/ccsdk/sli/core/utils/pool/PoolExtensionExceptionTest.java
@@ -0,0 +1,35 @@
+/*-

+* ============LICENSE_START=======================================================

+* ONAP : APPC

+* ================================================================================

+* Copyright (C) 2018 AT&T Intellectual Property. All rights reserved.

+* =============================================================================

+* Licensed under the Apache License, Version 2.0 (the "License");

+* you may not use this file except in compliance with the License.

+* You may obtain a copy of the License at

+*

+*      http://www.apache.org/licenses/LICENSE-2.0

+*

+* Unless required by applicable law or agreed to in writing, software

+* distributed under the License is distributed on an "AS IS" BASIS,

+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

+* See the License for the specific language governing permissions and

+* limitations under the License.

+* ============LICENSE_END=========================================================

+*/

+package org.onap.ccsdk.sli.core.utils.pool;

+

+import org.junit.Assert;

+import org.junit.Test;

+

+public class PoolExtensionExceptionTest {

+

+    @Test

+    public void testPoolExtensionException() {

+        String message = "test message";

+        PoolExtensionException poolExtExcpt = new PoolExtensionException(message);

+        Assert.assertEquals(message, poolExtExcpt.getMessage());

+        Assert.assertEquals(message, poolExtExcpt.getLocalizedMessage());

+    }

+

+}

diff --git a/core/utils/provider/src/test/java/org/onap/ccsdk/sli/core/utils/pool/PoolTest.java b/core/utils/provider/src/test/java/org/onap/ccsdk/sli/core/utils/pool/PoolTest.java
new file mode 100644
index 000000000..c1c7aa199
--- /dev/null
+++ b/core/utils/provider/src/test/java/org/onap/ccsdk/sli/core/utils/pool/PoolTest.java
@@ -0,0 +1,335 @@
+/*-
+ * ============LICENSE_START=======================================================
+ * ONAP : APPC
+ * ================================================================================
+ * Copyright (C) 2017-2018 AT&T Intellectual Property. All rights reserved.
+ * ================================================================================
+ * Copyright (C) 2017 Amdocs
+ * =============================================================================
+ * Modifications Copyright (C) 2018 IBM.
+ * =============================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * ============LICENSE_END=========================================================
+ */
+
+
+
+package org.onap.ccsdk.sli.core.utils.pool;
+
+import java.io.IOException;
+import java.lang.reflect.InvocationTargetException;
+import java.lang.reflect.Method;
+import java.lang.reflect.Proxy;
+import java.util.Properties;
+import org.junit.Before;
+import org.junit.Test;
+import org.onap.ccsdk.sli.core.utils.pool.*;
+import org.onap.ccsdk.sli.core.utils.pool.Allocator;
+import org.onap.ccsdk.sli.core.utils.pool.Destructor;
+import org.onap.ccsdk.sli.core.utils.pool.Pool;
+
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertFalse;
+import static org.junit.Assert.assertNotNull;
+import static org.junit.Assert.assertNull;
+import static org.junit.Assert.assertTrue;
+
+public class PoolTest implements Allocator<Testable>, Destructor<Testable> {
+
+    private Pool<Testable> pool;
+    private static final int MIN = 10;
+    private static final int MAX = 100;
+    private int index = 0;
+    private int destroyCount = 0;
+
+    /**
+     * Set up the test by allocating a pool with MIN-MAX size (bounded pool)
+     *
+     * @throws PoolSpecificationException
+     *             If the minimum size is less than 0, or if the max size is non-zero and less than the min size.
+     */
+    @Before
+    public void setup() throws PoolSpecificationException {
+        pool = new Pool<>(MIN, MAX);
+        index = 0;
+        destroyCount = 0;
+    }
+
+    /**
+     * Test that trying to construct a pool with a bad minimum throws an exception
+     *
+     * @throws PoolSpecificationException
+     *             If the minimum size is less than 0, or if the max size is non-zero and less than the min size.
+     */
+    @Test(expected = PoolSpecificationException.class)
+    public void testInvalidMinSize() throws PoolSpecificationException {
+        pool = new Pool<>(-1, MAX);
+    }
+
+    /**
+     * Test that trying to construct a pool with a bad maximum throws an exception
+     *
+     * @throws PoolSpecificationException
+     *             If the minimum size is less than 0, or if the max size is non-zero and less than the min size.
+     */
+    @Test(expected = PoolSpecificationException.class)
+    public void testInvalidMaxSize() throws PoolSpecificationException {
+        pool = new Pool<>(MIN, -1);
+    }
+
+    /**
+     * Test creation of a pool where max is less than min fails
+     *
+     * @throws PoolSpecificationException
+     *             If the minimum size is less than 0, or if the max size is non-zero and less than the min size.
+     */
+    @Test(expected = PoolSpecificationException.class)
+    public void testInvalidSizeRange() throws PoolSpecificationException {
+        pool = new Pool<>(MAX, MIN);
+    }
+
+    /**
+     * Test state
+     */
+    @Test
+    public void testMinPool() {
+        assertEquals(MIN, pool.getMinPool());
+    }
+
+    /**
+     * Test state
+     */
+    @Test
+    public void testMaxPool() {
+        assertEquals(MAX, pool.getMaxPool());
+    }
+
+    /**
+     * Test state
+     */
+    @Test
+    public void testAllocator() {
+        assertNull(pool.getAllocator());
+        pool.setAllocator(this);
+        assertNotNull(pool.getAllocator());
+    }
+
+    /**
+     * Test state
+     */
+    @Test
+    public void testDestructor() {
+        assertNull(pool.getDestructor());
+        pool.setDestructor(this);
+        assertNotNull(pool.getDestructor());
+    }
+
+    /**
+     * Test that we can allocate and release elements and that the pool maintains them in MRU order
+     *
+     * @throws PoolExtensionException
+     *             If the pool cannot be extended
+     * @throws PoolDrainedException
+     *             If the caller is trying to reserve an element from a drained pool
+     */
+    @Test
+    public void testAllocateAndRelease() throws PoolExtensionException, PoolDrainedException {
+        pool.setAllocator(this);
+
+        assertFalse(pool.isDrained());
+
+        /*
+         * Allocate three elements
+         */
+        Testable value1 = pool.reserve();
+        assertNotNull(value1);
+        assertEquals(Integer.valueOf(MIN - 1), value1.getId());
+        assertEquals(1, pool.getAllocatedSize());
+        assertEquals(MIN - 1, pool.getFreeSize());
+        assertEquals(1, pool.getAllocatedSize());
+
+        Testable value2 = pool.reserve();
+        assertNotNull(value2);
+        assertEquals(Integer.valueOf(MIN - 2), value2.getId());
+        assertEquals(2, pool.getAllocatedSize());
+        assertEquals(MIN - 2, pool.getFreeSize());
+        assertEquals(2, pool.getAllocatedSize());
+
+        Testable value3 = pool.reserve();
+        assertNotNull(value3);
+        assertEquals(Integer.valueOf(MIN - 3), value3.getId());
+        assertEquals(3, pool.getAllocatedSize());
+        assertEquals(MIN - 3, pool.getFreeSize());
+        assertEquals(3, pool.getAllocatedSize());
+
+        /*
+         * Now, release them in the order obtained
+         */
+        pool.release(value1);
+        pool.release(value2);
+        pool.release(value3);
+
+        assertEquals(0, pool.getAllocatedSize());
+        assertEquals(MIN, pool.getFreeSize());
+
+        /*
+         * Now, allocate them again, but their values should be reversed (3, 2, 1) representing the most recently used
+         * to the least recently used.
+         */
+        value1 = pool.reserve();
+        assertNotNull(value1);
+        assertEquals(Integer.valueOf(MIN - 3), value1.getId());
+
+        value2 = pool.reserve();
+        assertNotNull(value2);
+        assertEquals(Integer.valueOf(MIN - 2), value2.getId());
+
+        value3 = pool.reserve();
+        assertNotNull(value3);
+        assertEquals(Integer.valueOf(MIN - 1), value3.getId());
+    }
+
+    /**
+     * Test that we can trim the pool to a desired size
+     *
+     * @throws PoolExtensionException
+     *             If the pool cannot be extended
+     * @throws NoSuchMethodException
+     *             if a matching method is not found.
+     * @throws SecurityException
+     *             if the request is denied.
+     * @throws IllegalAccessException
+     *             if this Method object is enforcing Java language access control and the underlying method is
+     *             inaccessible.
+     * @throws IllegalArgumentException
+     *             if the method is an instance method and the specified object argument is not an instance of the class
+     *             or interface declaring the underlying method (or of a subclass or implementor thereof); if the number
+     *             of actual and formal parameters differ; if an unwrapping conversion for primitive arguments fails; or
+     *             if, after possible unwrapping, a parameter value cannot be converted to the corresponding formal
+     *             parameter type by a method invocation conversion.
+     * @throws InvocationTargetException
+     *             if the underlying method throws an exception.
+     * @throws PoolDrainedException
+     *             If the caller is trying to reserve an element from a drained pool
+     */
+    @SuppressWarnings("nls")
+    @Test
+    public void testTrim() throws PoolExtensionException, NoSuchMethodException, SecurityException,
+        IllegalAccessException, IllegalArgumentException, InvocationTargetException, PoolDrainedException {
+        pool.setAllocator(this);
+        int SIZE = 50;
+        Proxy[] array = new Proxy[SIZE];
+
+        assertEquals(0, pool.getAllocatedSize());
+        for (int i = 0; i < SIZE; i++) {
+            array[i] = (Proxy) pool.reserve();
+        }
+        assertEquals(SIZE, pool.getAllocatedSize());
+
+        for (int i = 0; i < SIZE; i++) {
+            pool.release((Testable) array[i]);
+        }
+        assertEquals(0, pool.getAllocatedSize());
+
+        assertEquals(SIZE, pool.getFreeSize());
+
+        Method trimMethod = Pool.class.getDeclaredMethod("trim", new Class[] {
+            Integer.TYPE
+        });
+        trimMethod.setAccessible(true);
+        trimMethod.invoke(pool, new Object[] {
+            SIZE - MIN
+        });
+
+        assertEquals(MIN, pool.getFreeSize());
+    }
+
+    /**
+     * Test that we can drain a pool containing a mix of free and allocated elements
+     *
+     * @throws PoolExtensionException
+     *             If the pool cannot be extended
+     * @throws PoolDrainedException
+     *             If the caller is trying to reserve an element from a drained pool
+     */
+    @Test
+    public void testDrain() throws PoolExtensionException, PoolDrainedException {
+        int SIZE = 50;
+        int FREE = 20;
+        int ALLOC = SIZE - FREE;
+
+        Proxy[] array = new Proxy[SIZE];
+        pool.setAllocator(this);
+        pool.setDestructor(this);
+
+        assertFalse(pool.isDrained());
+
+        assertEquals(0, pool.getAllocatedSize());
+        for (int i = 0; i < SIZE; i++) {
+            array[i] = (Proxy) pool.reserve();
+        }
+        assertEquals(SIZE, pool.getAllocatedSize());
+
+        for (int i = 0; i < FREE; i++) {
+            pool.release((Testable) array[i]);
+        }
+        assertEquals(ALLOC, pool.getAllocatedSize());
+        assertEquals(FREE, pool.getFreeSize());
+
+        pool.drain();
+        assertEquals(0, pool.getFreeSize());
+        assertEquals(0, pool.getAllocatedSize());
+        assertTrue(pool.isDrained());
+
+        assertEquals(SIZE, destroyCount);
+    }
+
+    /**
+     * @see org.onap.ccsdk.sli.core.utils.pool.Destructor#destroy(java.io.Closeable, org.onap.ccsdk.sli.core.utils.pool.Pool)
+     */
+    @Override
+    public void destroy(Testable obj, Pool<Testable> pool) {
+        destroyCount++;
+        try {
+            obj.close();
+        } catch (IOException e) {
+            e.printStackTrace();
+        }
+    }
+
+    /**
+     * @see org.onap.ccsdk.sli.core.utils.pool.Allocator#allocate(org.onap.ccsdk.sli.core.utils.pool.Pool)
+     */
+    @Override
+    public Testable allocate(Pool<Testable> pool) {
+        Testable e = new org.onap.ccsdk.sli.core.utils.pool.Element(index++);
+
+        return e;
+    }
+
+    @Test
+    public void testGetAndSetProperties() throws PoolSpecificationException
+    {
+        pool= new Pool<Testable>(3, 5);
+        pool.setProperty("key1", "value1");
+        assertEquals("value1", pool.getProperty("key1"));
+    }
+
+    @Test
+    public void testGetProperties() throws PoolSpecificationException
+    {
+        pool= new Pool<Testable>(3, 5);
+        assertTrue(pool.getProperties() instanceof Properties);
+    }
+}
diff --git a/core/utils/provider/src/test/java/org/onap/ccsdk/sli/core/utils/pool/Testable.java b/core/utils/provider/src/test/java/org/onap/ccsdk/sli/core/utils/pool/Testable.java
new file mode 100644
index 000000000..95da40409
--- /dev/null
+++ b/core/utils/provider/src/test/java/org/onap/ccsdk/sli/core/utils/pool/Testable.java
@@ -0,0 +1,34 @@
+/*-
+ * ============LICENSE_START=======================================================
+ * ONAP : APPC
+ * ================================================================================
+ * Copyright (C) 2017-2018 AT&T Intellectual Property. All rights reserved.
+ * ================================================================================
+ * Copyright (C) 2017 Amdocs
+ * =============================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * ============LICENSE_END=========================================================
+ */
+
+package org.onap.ccsdk.sli.core.utils.pool;
+
+import java.io.Closeable;
+
+public interface Testable extends Closeable {
+
+    Integer getId();
+
+    Boolean isClosed();
+}
+