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;
24 import javax.script.Compilable;
25 import javax.script.CompiledScript;
26 import javax.script.ScriptEngine;
27 import javax.script.ScriptEngineManager;
28 import javax.script.ScriptException;
29 import org.onap.policy.apex.context.ContextException;
30 import org.onap.policy.apex.core.engine.executor.StateFinalizerExecutor;
31 import org.onap.policy.apex.core.engine.executor.exception.StateMachineException;
32 import org.slf4j.ext.XLogger;
33 import org.slf4j.ext.XLoggerFactory;
36 * The Class JavascriptStateFinalizerExecutor is the state finalizer executor for state finalizer
37 * logic written in Javascript It is unlikely that this is thread safe.
39 * @author Liam Fallon (liam.fallon@ericsson.com)
41 public class JavascriptStateFinalizerExecutor extends StateFinalizerExecutor {
42 // Logger for this class
43 private static final XLogger LOGGER = XLoggerFactory.getXLogger(JavascriptStateFinalizerExecutor.class);
46 private ScriptEngine engine = new ScriptEngineManager().getEngineByName("JavaScript");
47 private CompiledScript compiled = null;
50 * Prepares the state finalizer for processing.
52 * @throws StateMachineException thrown when a state machine execution error occurs
55 public void prepare() throws StateMachineException {
56 // Call generic prepare logic
59 compiled = ((Compilable) engine).compile(getSubject().getLogic());
60 } catch (final ScriptException e) {
61 LOGGER.error("execute: state finalizer logic failed to compile for state finalizer \""
62 + getSubject().getKey().getId() + "\"");
63 throw new StateMachineException("state finalizer logic failed to compile for state finalizer \""
64 + getSubject().getKey().getId() + "\"", e);
69 * Executes the executor for the state finalizer logic in a sequential manner.
71 * @param executionId the execution ID for the current APEX policy execution
72 * @param incomingFields the incoming fields for finalisation
73 * @return The state output for the state
74 * @throws StateMachineException on an execution error
75 * @throws ContextException on context errors
78 public String execute(final long executionId, final Map<String, Object> incomingFields)
79 throws StateMachineException, ContextException {
80 // Do execution pre work
81 executePre(executionId, incomingFields);
83 // Set up the Javascript engine
84 engine.put("executor", getExecutionContext());
86 // Check and execute the Javascript logic
87 boolean returnValue = false;
89 if (compiled == null) {
90 engine.eval(getSubject().getLogic());
92 compiled.eval(engine.getContext());
94 } catch (final ScriptException e) {
95 LOGGER.error("execute: state finalizer logic failed to run for state finalizer \""
96 + getSubject().getKey().getId() + "\"");
97 throw new StateMachineException("state finalizer logic failed to run for state finalizer \""
98 + getSubject().getKey().getId() + "\"", e);
101 // Do the execution post work
102 executePost((boolean) engine.get("returnValue"));
104 return getOutgoing();
108 * Cleans up the state finalizer after processing.
110 * @throws StateMachineException thrown when a state machine execution error occurs
113 public void cleanUp() throws StateMachineException {
114 LOGGER.debug("cleanUp:" + getSubject().getKey().getId() + "," + getSubject().getLogicFlavour() + ","
115 + getSubject().getLogic());