2 * ============LICENSE_START=======================================================
3 * Copyright (C) 2016-2018 Ericsson. All rights reserved.
4 * ================================================================================
5 * Licensed under the Apache License, Version 2.0 (the "License");
6 * you may not use this file except in compliance with the License.
7 * You may obtain a copy of the License at
9 * http://www.apache.org/licenses/LICENSE-2.0
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
17 * SPDX-License-Identifier: Apache-2.0
18 * ============LICENSE_END=========================================================
21 package org.onap.policy.apex.plugins.executor.javascript;
25 import javax.script.Compilable;
26 import javax.script.CompiledScript;
27 import javax.script.ScriptEngine;
28 import javax.script.ScriptEngineManager;
29 import javax.script.ScriptException;
31 import org.onap.policy.apex.context.ContextException;
32 import org.onap.policy.apex.core.engine.executor.StateFinalizerExecutor;
33 import org.onap.policy.apex.core.engine.executor.exception.StateMachineException;
34 import org.slf4j.ext.XLogger;
35 import org.slf4j.ext.XLoggerFactory;
38 * The Class JavascriptStateFinalizerExecutor is the state finalizer executor for state finalizer logic written in
39 * Javascript It is unlikely that this is thread safe.
41 * @author Liam Fallon (liam.fallon@ericsson.com)
43 public class JavascriptStateFinalizerExecutor extends StateFinalizerExecutor {
44 // Logger for this class
45 private static final XLogger LOGGER = XLoggerFactory.getXLogger(JavascriptStateFinalizerExecutor.class);
48 private ScriptEngine engine = new ScriptEngineManager().getEngineByName("JavaScript");
49 private CompiledScript compiled = null;
52 * Prepares the state finalizer for processing.
54 * @throws StateMachineException thrown when a state machine execution error occurs
57 public void prepare() throws StateMachineException {
58 // Call generic prepare logic
61 compiled = ((Compilable) engine).compile(getSubject().getLogic());
62 } catch (final ScriptException e) {
63 LOGGER.error("execute: state finalizer logic failed to compile for state finalizer \""
64 + getSubject().getKey().getId() + "\"");
65 throw new StateMachineException("state finalizer logic failed to compile for state finalizer \""
66 + getSubject().getKey().getId() + "\"", e);
71 * Executes the executor for the state finalizer logic in a sequential manner.
73 * @param executionId the execution ID for the current APEX policy execution
74 * @param incomingFields the incoming fields for finalisation
75 * @return The state output for the state
76 * @throws StateMachineException on an execution error
77 * @throws ContextException on context errors
80 public String execute(final long executionId, final Map<String, Object> incomingFields)
81 throws StateMachineException, ContextException {
82 // Do execution pre work
83 executePre(executionId, incomingFields);
85 // Set up the Javascript engine
86 engine.put("executor", getExecutionContext());
88 // Check and execute the Javascript logic
89 boolean returnValue = false;
91 if (compiled == null) {
92 engine.eval(getSubject().getLogic());
94 compiled.eval(engine.getContext());
96 } catch (final ScriptException e) {
97 LOGGER.error("execute: state finalizer logic failed to run for state finalizer \""
98 + getSubject().getKey().getId() + "\"");
99 throw new StateMachineException("state finalizer logic failed to run for state finalizer \""
100 + getSubject().getKey().getId() + "\"", e);
103 returnValue = (boolean) engine.get("returnValue");
105 // Do the execution post work
106 executePost(returnValue);
108 // Send back the return event
110 return getOutgoing();
117 * Cleans up the state finalizer after processing.
119 * @throws StateMachineException thrown when a state machine execution error occurs
122 public void cleanUp() throws StateMachineException {
123 LOGGER.debug("cleanUp:" + getSubject().getKey().getId() + "," + getSubject().getLogicFlavour() + ","
124 + getSubject().getLogic());