2 * ============LICENSE_START=======================================================
3 * Copyright (C) 2016-2018 Ericsson. All rights reserved.
4 * Modifications Copyright (C) 2020 Nordix Foundation.
5 * ================================================================================
6 * Licensed under the Apache License, Version 2.0 (the "License");
7 * you may not use this file except in compliance with the License.
8 * You may obtain a copy of the License at
10 * http://www.apache.org/licenses/LICENSE-2.0
12 * Unless required by applicable law or agreed to in writing, software
13 * distributed under the License is distributed on an "AS IS" BASIS,
14 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
15 * See the License for the specific language governing permissions and
16 * limitations under the License.
18 * SPDX-License-Identifier: Apache-2.0
19 * ============LICENSE_END=========================================================
22 package org.onap.policy.apex.plugins.executor.java;
24 import java.lang.reflect.Method;
26 import java.util.Properties;
27 import org.onap.policy.apex.context.ContextException;
28 import org.onap.policy.apex.core.engine.executor.StateFinalizerExecutor;
29 import org.onap.policy.apex.core.engine.executor.context.StateFinalizerExecutionContext;
30 import org.onap.policy.apex.core.engine.executor.exception.StateMachineException;
31 import org.slf4j.ext.XLogger;
32 import org.slf4j.ext.XLoggerFactory;
35 * The Class JavaStateFinalizerExecutor is the state finalizer executor for state finalizer logic written in Java.
37 * @author Liam Fallon (liam.fallon@ericsson.com)
39 public class JavaStateFinalizerExecutor extends StateFinalizerExecutor {
40 // Logger for this class
41 private static final XLogger LOGGER = XLoggerFactory.getXLogger(JavaStateFinalizerExecutor.class);
43 // The Java State Finalizer executor class
44 private Object stateFinalizerLogicObject = null;
47 * Prepares the state finalizer for processing.
49 * @throws StateMachineException thrown when a state machine execution error occurs
52 public void prepare() throws StateMachineException {
53 // Call generic prepare logic
56 // Get the class for state finalizer execution
58 // Create the state finalizer logic object from the byte code of the class
59 stateFinalizerLogicObject = Class.forName(getSubject().getLogic()).getDeclaredConstructor().newInstance();
60 } catch (final Exception e) {
61 LOGGER.error("instantiation error on Java class \"" + getSubject().getLogic() + "\"", e);
62 throw new StateMachineException("instantiation error on Java class \"" + getSubject().getLogic() + "\"", e);
67 * Executes the executor for the state finalizer logic in a sequential manner.
69 * @param executionId the execution ID for the current APEX policy execution
70 * @param executionProperties properties for the current APEX policy execution
71 * @param incomingFields the incoming fields for finalisation
72 * @return The state output for the state
73 * @throws StateMachineException on an execution error
74 * @throws ContextException on context errors
77 public String execute(final long executionId, final Properties executionProperties,
78 final Map<String, Object> incomingFields) throws StateMachineException, ContextException {
79 // Do execution pre work
80 executePre(executionId, executionProperties, incomingFields);
82 // Check and execute the Java logic
83 boolean returnValue = false;
85 // Find and call the method with the signature "public boolean getStateOutput(final
86 // StateFinalizerExecutionContext executor) throws ApexException"
88 // task logic in the Java class
89 final Method method = stateFinalizerLogicObject.getClass().getDeclaredMethod("getStateOutput",
90 new Class[] {StateFinalizerExecutionContext.class});
91 returnValue = (boolean) method.invoke(stateFinalizerLogicObject, getExecutionContext());
92 } catch (final Exception e) {
93 LOGGER.error("execute: state finalizer logic failed to run for state finalizer \"" + getSubject().getId()
95 throw new StateMachineException(
96 "state finalizer logic failed to run for state finalizer \"" + getSubject().getId() + "\"", e);
99 // Do the execution post work
100 executePost(returnValue);
102 // Send back the return event
103 return getOutgoing();
107 * Cleans up the state finalizer after processing.
109 * @throws StateMachineException thrown when a state machine execution error occurs
112 public void cleanUp() throws StateMachineException {
113 LOGGER.debug("cleanUp:" + getSubject().getId() + "," + getSubject().getLogicFlavour() + ","
114 + getSubject().getLogic());