Adding plugins-event module to apex-pdp

Adding plugins-event module to apex-pdp
Fix a minor bug in TextFileUtils

Change-Id: I393c5f5809d078850d6669d22759ba9fa1b4f0e6
Issue-ID: POLICY-862
Signed-off-by: ramverma <ram.krishna.verma@ericsson.com>

6 files changed, 471 insertions, 0 deletions

diff --git a/plugins/plugins-executor/plugins-executor-mvel/pom.xml b/plugins/plugins-executor/plugins-executor-mvel/pom.xml
new file mode 100644
index 000000000..a8b2c7db9
--- /dev/null
+++ b/plugins/plugins-executor/plugins-executor-mvel/pom.xml
@@ -0,0 +1,44 @@
+<!--
+  ============LICENSE_START=======================================================
+   Copyright (C) 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=========================================================
+-->
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+    xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+    <parent>
+        <groupId>org.onap.policy.apex-pdp.plugins.plugins-executor</groupId>
+        <artifactId>plugins-executor</artifactId>
+        <version>2.0.0-SNAPSHOT</version>
+    </parent>
+
+    <artifactId>plugins-executor-mvel</artifactId>
+    <name>${project.artifactId}</name>
+    <description>[${project.parent.artifactId}] Plugin for execution of Mvel logic in Apex</description>
+
+    <properties>
+        <apex-plugins-executor-mvel-dir>${project.basedir}/src</apex-plugins-executor-mvel-dir>
+    </properties>
+
+    <dependencies>
+        <dependency>
+            <groupId>org.mvel</groupId>
+            <artifactId>mvel2</artifactId>
+            <version>2.3.1.Final</version>
+        </dependency>
+    </dependencies>
+</project>
\ No newline at end of file
diff --git a/plugins/plugins-executor/plugins-executor-mvel/src/main/java/org/onap/policy/apex/plugins/executor/mvel/MVELExecutorParameters.java b/plugins/plugins-executor/plugins-executor-mvel/src/main/java/org/onap/policy/apex/plugins/executor/mvel/MVELExecutorParameters.java
new file mode 100644
index 000000000..21d124212
--- /dev/null
+++ b/plugins/plugins-executor/plugins-executor-mvel/src/main/java/org/onap/policy/apex/plugins/executor/mvel/MVELExecutorParameters.java
@@ -0,0 +1,42 @@
+/*-
+ * ============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.executor.mvel;
+
+import org.onap.policy.apex.core.engine.ExecutorParameters;
+
+/**
+ * This class provides executor parameters for the MVEL Executor plugin. It specifies the classes that provide the MVEL
+ * implementations of the abstract classes {@link org.onap.policy.apex.core.engine.executor.TaskExecutor},
+ * {@link org.onap.policy.apex.core.engine.executor.TaskSelectExecutor}, and
+ * {@link org.onap.policy.apex.core.engine.executor.StateFinalizerExecutor}.
+ *
+ * @author Liam Fallon (liam.fallon@ericsson.com)
+ */
+public class MVELExecutorParameters extends ExecutorParameters {
+    /**
+     * Constructor that sets the abstract implementation classes.
+     */
+    public MVELExecutorParameters() {
+        this.setTaskExecutorPluginClass(MvelTaskExecutor.class.getCanonicalName());
+        this.setTaskSelectionExecutorPluginClass(MvelTaskSelectExecutor.class.getCanonicalName());
+        this.setStateFinalizerExecutorPluginClass(MvelStateFinalizerExecutor.class.getCanonicalName());
+    }
+}
diff --git a/plugins/plugins-executor/plugins-executor-mvel/src/main/java/org/onap/policy/apex/plugins/executor/mvel/MvelStateFinalizerExecutor.java b/plugins/plugins-executor/plugins-executor-mvel/src/main/java/org/onap/policy/apex/plugins/executor/mvel/MvelStateFinalizerExecutor.java
new file mode 100644
index 000000000..8cd76a94d
--- /dev/null
+++ b/plugins/plugins-executor/plugins-executor-mvel/src/main/java/org/onap/policy/apex/plugins/executor/mvel/MvelStateFinalizerExecutor.java
@@ -0,0 +1,118 @@
+/*-
+ * ============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.executor.mvel;
+
+import static org.onap.policy.apex.model.utilities.Assertions.argumentNotNull;
+
+import java.io.Serializable;
+import java.util.HashMap;
+import java.util.Map;
+
+import org.mvel2.MVEL;
+import org.onap.policy.apex.context.ContextException;
+import org.onap.policy.apex.core.engine.executor.StateFinalizerExecutor;
+import org.onap.policy.apex.core.engine.executor.exception.StateMachineException;
+import org.slf4j.ext.XLogger;
+import org.slf4j.ext.XLoggerFactory;
+
+/**
+ * The Class MvelStateFinalizerExecutor is the state finalizer executor for state finalizer logic written in MVEL.
+ *
+ * @author Liam Fallon (liam.fallon@ericsson.com)
+ */
+public class MvelStateFinalizerExecutor extends StateFinalizerExecutor {
+    // Logger for this class
+    private static final XLogger LOGGER = XLoggerFactory.getXLogger(MvelStateFinalizerExecutor.class);
+
+    // The MVEL code
+    private Serializable compiled = null;
+
+    /**
+     * Prepares the state finalizer for processing.
+     *
+     * @throws StateMachineException thrown when a state machine execution error occurs
+     */
+    @Override
+    public void prepare() throws StateMachineException {
+        // Call generic prepare logic
+        super.prepare();
+
+        // Compile the MVEL code
+        try {
+            compiled = MVEL.compileExpression(getSubject().getLogic());
+        } catch (final Exception e) {
+            LOGGER.warn("failed to compile MVEL code for state " + getSubject().getKey().getID(), e);
+            throw new StateMachineException("failed to compile MVEL code for state " + getSubject().getKey().getID(),
+                    e);
+        }
+    }
+
+    /**
+     * Executes the executor for the state finalizer logic in a sequential manner.
+     *
+     * @param executionID the execution ID for the current APEX policy execution
+     * @param incomingFields the incoming fields for finalisation
+     * @return The state output for the state
+     * @throws StateMachineException on an execution error
+     * @throws ContextException on context errors
+     */
+    @Override
+    public String execute(final long executionID, final Map<String, Object> incomingFields)
+            throws StateMachineException, ContextException {
+        // Do execution pre work
+        executePre(executionID, incomingFields);
+
+        // Check and execute the MVEL logic
+        argumentNotNull(compiled, "MVEL state finalizer logic not compiled.");
+
+        boolean returnValue = false;
+        try {
+            // Execute the MVEL code
+            returnValue =
+                    (boolean) MVEL.executeExpression(compiled, getExecutionContext(), new HashMap<String, Object>());
+        } catch (final Exception e) {
+            LOGGER.warn("failed to execute MVEL code for state " + getSubject().getKey().getID(), e);
+            throw new StateMachineException("failed to execute MVEL code for state " + getSubject().getKey().getID(),
+                    e);
+        }
+
+        // Do the execution post work
+        executePost(returnValue);
+
+        // Send back the return event
+        if (returnValue) {
+            return getOutgoing();
+        } else {
+            return null;
+        }
+    }
+
+    /**
+     * Cleans up the state finalizer after processing.
+     *
+     * @throws StateMachineException thrown when a state machine execution error occurs
+     */
+    @Override
+    public void cleanUp() throws StateMachineException {
+        LOGGER.debug("cleanUp:" + getSubject().getKey().getID() + "," + getSubject().getLogicFlavour() + ","
+                + getSubject().getLogic());
+    }
+}
diff --git a/plugins/plugins-executor/plugins-executor-mvel/src/main/java/org/onap/policy/apex/plugins/executor/mvel/MvelTaskExecutor.java b/plugins/plugins-executor/plugins-executor-mvel/src/main/java/org/onap/policy/apex/plugins/executor/mvel/MvelTaskExecutor.java
new file mode 100644
index 000000000..8599eabac
--- /dev/null
+++ b/plugins/plugins-executor/plugins-executor-mvel/src/main/java/org/onap/policy/apex/plugins/executor/mvel/MvelTaskExecutor.java
@@ -0,0 +1,117 @@
+/*-
+ * ============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.executor.mvel;
+
+import static org.onap.policy.apex.model.utilities.Assertions.argumentNotNull;
+
+import java.io.Serializable;
+import java.util.HashMap;
+import java.util.Map;
+
+import org.mvel2.MVEL;
+import org.onap.policy.apex.context.ContextException;
+import org.onap.policy.apex.core.engine.executor.TaskExecutor;
+import org.onap.policy.apex.core.engine.executor.exception.StateMachineException;
+import org.slf4j.ext.XLogger;
+import org.slf4j.ext.XLoggerFactory;
+
+/**
+ * The Class MvelTaskExecutor is the task executor for task logic written in MVEL.
+ *
+ * @author Liam Fallon (liam.fallon@ericsson.com)
+ */
+public class MvelTaskExecutor extends TaskExecutor {
+    // Logger for this class
+    private static final XLogger LOGGER = XLoggerFactory.getXLogger(MvelTaskExecutor.class);
+
+    // The MVEL code
+    private Serializable compiled = null;
+
+    /**
+     * Prepares the task for processing.
+     *
+     * @throws StateMachineException thrown when a state machine execution error occurs
+     */
+    @Override
+    public void prepare() throws StateMachineException {
+        // Call generic prepare logic
+        super.prepare();
+
+        // Compile the MVEL code
+        try {
+            compiled = MVEL.compileExpression(getSubject().getTaskLogic().getLogic());
+        } catch (final Exception e) {
+            LOGGER.warn("failed to compile MVEL code for task " + getSubject().getKey().getID(), e);
+            throw new StateMachineException("failed to compile MVEL code for task " + getSubject().getKey().getID(), e);
+        }
+        argumentNotNull(compiled, "MVEL task not compiled.");
+    }
+
+    /**
+     * Executes the executor for the task in a sequential manner.
+     *
+     * @param executionID the execution ID for the current APEX policy execution
+     * @param incomingFields the incoming fields
+     * @return The outgoing fields
+     * @throws StateMachineException on an execution error
+     * @throws ContextException on context errors
+     */
+    @Override
+    public Map<String, Object> execute(final long executionID, final Map<String, Object> incomingFields)
+            throws StateMachineException, ContextException {
+        // Do execution pre work
+        executePre(executionID, incomingFields);
+
+        // Check and execute the MVEL logic
+        argumentNotNull(compiled, "MVEL task not compiled.");
+        boolean returnValue = false;
+
+        try {
+            // Execute the MVEL code
+            returnValue =
+                    (boolean) MVEL.executeExpression(compiled, getExecutionContext(), new HashMap<String, Object>());
+        } catch (final Exception e) {
+            LOGGER.warn("failed to execute MVEL code for task " + getSubject().getKey().getID(), e);
+            throw new StateMachineException("failed to execute MVEL code for task " + getSubject().getKey().getID(), e);
+        }
+
+        // Do the execution post work
+        executePost(returnValue);
+
+        // Send back the return event
+        if (returnValue) {
+            return getOutgoing();
+        } else {
+            return null;
+        }
+    }
+
+    /**
+     * Cleans up the task after processing.
+     *
+     * @throws StateMachineException thrown when a state machine execution error occurs
+     */
+    @Override
+    public void cleanUp() throws StateMachineException {
+        LOGGER.debug("cleanUp:" + getSubject().getKey().getID() + "," + getSubject().getTaskLogic().getLogicFlavour()
+                + "," + getSubject().getTaskLogic().getLogic());
+    }
+}
diff --git a/plugins/plugins-executor/plugins-executor-mvel/src/main/java/org/onap/policy/apex/plugins/executor/mvel/MvelTaskSelectExecutor.java b/plugins/plugins-executor/plugins-executor-mvel/src/main/java/org/onap/policy/apex/plugins/executor/mvel/MvelTaskSelectExecutor.java
new file mode 100644
index 000000000..3cb5d9bf6
--- /dev/null
+++ b/plugins/plugins-executor/plugins-executor-mvel/src/main/java/org/onap/policy/apex/plugins/executor/mvel/MvelTaskSelectExecutor.java
@@ -0,0 +1,120 @@
+/*-
+ * ============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.executor.mvel;
+
+import static org.onap.policy.apex.model.utilities.Assertions.argumentNotNull;
+
+import java.io.Serializable;
+import java.util.HashMap;
+
+import org.mvel2.MVEL;
+import org.onap.policy.apex.context.ContextException;
+import org.onap.policy.apex.core.engine.event.EnEvent;
+import org.onap.policy.apex.core.engine.executor.TaskSelectExecutor;
+import org.onap.policy.apex.core.engine.executor.exception.StateMachineException;
+import org.onap.policy.apex.model.basicmodel.concepts.AxArtifactKey;
+import org.slf4j.ext.XLogger;
+import org.slf4j.ext.XLoggerFactory;
+
+/**
+ * The Class MvelTaskSelectExecutor is the task selection executor for task selection logic written in MVEL.
+ *
+ * @author Liam Fallon (liam.fallon@ericsson.com)
+ */
+public class MvelTaskSelectExecutor extends TaskSelectExecutor {
+    // Logger for this class
+    private static final XLogger LOGGER = XLoggerFactory.getXLogger(MvelTaskSelectExecutor.class);
+
+    // The MVEL code
+    private Serializable compiled = null;
+
+    /**
+     * Prepares the task for processing.
+     *
+     * @throws StateMachineException thrown when a state machine execution error occurs
+     */
+    @Override
+    public void prepare() throws StateMachineException {
+        // Call generic prepare logic
+        super.prepare();
+
+        // Compile the MVEL code
+        try {
+            compiled = MVEL.compileExpression(getSubject().getTaskSelectionLogic().getLogic());
+        } catch (final Exception e) {
+            LOGGER.warn("failed to compile MVEL code for state " + getSubject().getKey().getID(), e);
+            throw new StateMachineException("failed to compile MVEL code for state " + getSubject().getKey().getID(),
+                    e);
+        }
+    }
+
+    /**
+     * Executes the executor for the task in a sequential manner.
+     *
+     * @param executionID the execution ID for the current APEX policy execution
+     * @param incomingEvent the incoming event
+     * @return The outgoing event
+     * @throws StateMachineException on an execution error
+     * @throws ContextException on context errors
+     */
+    @Override
+    public AxArtifactKey execute(final long executionID, final EnEvent incomingEvent)
+            throws StateMachineException, ContextException {
+        // Do execution pre work
+        executePre(executionID, incomingEvent);
+
+        // Check and execute the MVEL logic
+        argumentNotNull(compiled, "MVEL task not compiled.");
+
+        boolean returnValue = false;
+        try {
+            // Execute the MVEL code
+            returnValue =
+                    (boolean) MVEL.executeExpression(compiled, getExecutionContext(), new HashMap<String, Object>());
+        } catch (final Exception e) {
+            LOGGER.warn("failed to execute MVEL code for state " + getSubject().getKey().getID(), e);
+            throw new StateMachineException("failed to execute MVEL code for state " + getSubject().getKey().getID(),
+                    e);
+        }
+
+        // Do the execution post work
+        executePost(returnValue);
+
+        // Send back the return event
+        if (returnValue) {
+            return getOutgoing();
+        } else {
+            return null;
+        }
+    }
+
+    /**
+     * Cleans up the task after processing.
+     *
+     * @throws StateMachineException thrown when a state machine execution error occurs
+     */
+    @Override
+    public void cleanUp() throws StateMachineException {
+        LOGGER.debug("cleanUp:" + getSubject().getKey().getID() + ","
+                + getSubject().getTaskSelectionLogic().getLogicFlavour() + ","
+                + getSubject().getTaskSelectionLogic().getLogic());
+    }
+}
diff --git a/plugins/plugins-executor/plugins-executor-mvel/src/main/java/org/onap/policy/apex/plugins/executor/mvel/package-info.java b/plugins/plugins-executor/plugins-executor-mvel/src/main/java/org/onap/policy/apex/plugins/executor/mvel/package-info.java
new file mode 100644
index 000000000..8e8ab889b
--- /dev/null
+++ b/plugins/plugins-executor/plugins-executor-mvel/src/main/java/org/onap/policy/apex/plugins/executor/mvel/package-info.java
@@ -0,0 +1,30 @@
+/*-
+ * ============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 MVEL executor plugin for APEX, providing extensions of the abstract classes
+ * {@link com.ericsson.apex.core.engine.executor.TaskExecutor},
+ * {@link com.ericsson.apex.core.engine.executor.TaskSelectExecutor}, and
+ * {@link com.ericsson.apex.core.engine.executor.StateFinalizerExecutor}.
+ *
+ * @author Liam Fallon (liam.fallon@ericsson.com)
+ */
+
+package org.onap.policy.apex.plugins.executor.mvel;