Adding apex plugins/plugins-context modules

Change-Id: I36fc295ffbd22661bf8bd091bfb20ebf6dcc7f5e
Issue-ID: POLICY-862
Signed-off-by: waqas.ikram <waqas.ikram@ericsson.com>

3 files changed, 188 insertions, 0 deletions

diff --git a/plugins/plugins-context/context-distribution/context-distribution-hazelcast/src/main/java/org/onap/policy/apex/plugins/context/distribution/hazelcast/HazelcastContextDistributor.java b/plugins/plugins-context/context-distribution/context-distribution-hazelcast/src/main/java/org/onap/policy/apex/plugins/context/distribution/hazelcast/HazelcastContextDistributor.java
new file mode 100644
index 000000000..2b17b17cf
--- /dev/null
+++ b/plugins/plugins-context/context-distribution/context-distribution-hazelcast/src/main/java/org/onap/policy/apex/plugins/context/distribution/hazelcast/HazelcastContextDistributor.java
@@ -0,0 +1,106 @@
+/*-
+ * ============LICENSE_START=======================================================
+ *  Copyright (C) 2016-2018 Ericsson. 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.
+ * 
+ * SPDX-License-Identifier: Apache-2.0
+ * ============LICENSE_END=========================================================
+ */
+
+package org.onap.policy.apex.plugins.context.distribution.hazelcast;
+
+import java.util.Map;
+
+import org.onap.policy.apex.context.ContextException;
+import org.onap.policy.apex.context.impl.distribution.AbstractDistributor;
+import org.onap.policy.apex.model.basicmodel.concepts.AxArtifactKey;
+import org.slf4j.ext.XLogger;
+import org.slf4j.ext.XLoggerFactory;
+
+import com.hazelcast.core.Hazelcast;
+import com.hazelcast.core.HazelcastInstance;
+
+/**
+ * This context distributor distributes context across threads in multiple JVMs on multiple hosts.
+ * It uses hazelcast to distribute maps.
+ *
+ * @author Liam Fallon (liam.fallon@ericsson.com)
+ */
+public class HazelcastContextDistributor extends AbstractDistributor {
+    // Logger for this class
+    private static final XLogger LOGGER = XLoggerFactory.getXLogger(HazelcastContextDistributor.class);
+
+    // The hazelcast instance for distributing context for this JVM
+    private static HazelcastInstance hazelcastInstance = null;
+
+    /**
+     * Create an instance of a Hazelcast Context Distributor.
+     *
+     * @throws ContextException On errors creating the context distributor
+     */
+    public HazelcastContextDistributor() throws ContextException {
+        super();
+        LOGGER.entry("HazelcastContextDistributor()");
+
+        LOGGER.exit("HazelcastContextDistributor()");
+    }
+
+    /*
+     * (non-Javadoc)
+     *
+     * @see org.onap.policy.apex.context.impl.distribution.AbstractContextDistributor#init(org.onap.
+     * policy.apex.model.basicmodel.concepts.AxArtifactKey)
+     */
+    @Override
+    public void init(final AxArtifactKey key) throws ContextException {
+        LOGGER.entry("init(" + key + ")");
+
+        super.init(key);
+
+        // Create the hazelcast instance if it does not already exist
+        if (hazelcastInstance == null) {
+            hazelcastInstance = Hazelcast.newHazelcastInstance();
+        }
+
+        LOGGER.exit("init(" + key + ")");
+    }
+
+    /*
+     * (non-Javadoc)
+     *
+     * @see org.onap.policy.apex.core.context.impl.distribution.AbstractContextDistributor#
+     * getContextAlbumMap(org.onap.policy.apex.core.model.concepts.AxArtifactKey)
+     */
+    @Override
+    public Map<String, Object> getContextAlbumMap(final AxArtifactKey contextAlbumKey) {
+        // Get the map from Hazelcast
+        LOGGER.info("HazelcastContextDistributor: create album: " + contextAlbumKey.getID());
+        return hazelcastInstance.getMap(contextAlbumKey.getID());
+    }
+
+    /*
+     * (non-Javadoc)
+     *
+     * @see
+     * org.onap.policy.apex.core.context.impl.distribution.AbstractContextDistributor#shutdown()
+     */
+    @Override
+    public void shutdown() {
+        // Shut down the hazelcast instance
+        if (hazelcastInstance != null) {
+            hazelcastInstance.shutdown();
+        }
+        hazelcastInstance = null;
+    }
+}
diff --git a/plugins/plugins-context/context-distribution/context-distribution-hazelcast/src/main/java/org/onap/policy/apex/plugins/context/distribution/hazelcast/package-info.java b/plugins/plugins-context/context-distribution/context-distribution-hazelcast/src/main/java/org/onap/policy/apex/plugins/context/distribution/hazelcast/package-info.java
new file mode 100644
index 000000000..027aeecde
--- /dev/null
+++ b/plugins/plugins-context/context-distribution/context-distribution-hazelcast/src/main/java/org/onap/policy/apex/plugins/context/distribution/hazelcast/package-info.java
@@ -0,0 +1,27 @@
+/*-
+ * ============LICENSE_START=======================================================
+ *  Copyright (C) 2016-2018 Ericsson. 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.
+ * 
+ * SPDX-License-Identifier: Apache-2.0
+ * ============LICENSE_END=========================================================
+ */
+
+/**
+ * Implements the <a href="http://hazelcast.org/">Hazelcast</a> context distributor for distribution
+ * of Apex context across JVMs.
+ *
+ * @author Liam Fallon (liam.fallon@ericsson.com)
+ */
+package org.onap.policy.apex.plugins.context.distribution.hazelcast;
diff --git a/plugins/plugins-context/context-distribution/context-distribution-hazelcast/src/main/resources/hazelcast/hazelcast.xml.sample b/plugins/plugins-context/context-distribution/context-distribution-hazelcast/src/main/resources/hazelcast/hazelcast.xml.sample
new file mode 100644
index 000000000..5f6c1b005
--- /dev/null
+++ b/plugins/plugins-context/context-distribution/context-distribution-hazelcast/src/main/resources/hazelcast/hazelcast.xml.sample
@@ -0,0 +1,55 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!--
+  ============LICENSE_START=======================================================
+   Copyright (C) 2016-2018 Ericsson. 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.
+  
+  SPDX-License-Identifier: Apache-2.0
+  ============LICENSE_END=========================================================
+-->
+
+<hazelcast xmlns="http://www.hazelcast.com/schema/config"
+    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
+    <group>
+        <name>ApexHazelcastGroup</name>
+        <password>ApexHazelcastGroupPassword</password>
+    </group>
+    <network>
+        <port auto-increment="true">5706</port>
+        <join>
+            <multicast enabled="false">
+                <multicast-group>224.2.2.10</multicast-group>
+                <multicast-port>54327</multicast-port>
+            </multicast>
+            <tcp-ip enabled="true">
+                <members>127.0.0.1</members>
+            </tcp-ip>
+        </join>
+        <interfaces enabled="false">
+            <!-- This value will allow hazelcast to run locally from the IDE -->
+            <interface>127.0.0.*</interface>
+        </interfaces>
+    </network>
+    <properties>
+        <property name="hazelcast.icmp.enabled">true</property>
+        <property name="hazelcast.logging.type">slf4j</property>
+        <!-- disable the hazelcast shutdown hook - prefer to control the shutdown 
+            in code -->
+        <property name="hazelcast.shutdownhook.enabled">false</property>
+        <property name="hazelcast.graceful.shutdown.max.wait">60</property>
+    </properties>
+    <executor-service>
+        <pool-size>16</pool-size>
+    </executor-service>
+</hazelcast>