2 * ============LICENSE_START=======================================================
3 * Copyright (C) 2016-2018 Ericsson. All rights reserved.
4 * Modifications Copyright (C) 2019 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.javascript;
25 import java.util.Properties;
27 import javax.script.Compilable;
28 import javax.script.CompiledScript;
29 import javax.script.ScriptEngine;
30 import javax.script.ScriptEngineManager;
31 import javax.script.ScriptException;
32 import org.onap.policy.apex.context.ContextException;
33 import org.onap.policy.apex.core.engine.executor.TaskExecutor;
34 import org.onap.policy.apex.core.engine.executor.exception.StateMachineException;
35 import org.slf4j.ext.XLogger;
36 import org.slf4j.ext.XLoggerFactory;
39 * The Class JavascriptTaskExecutor is the task executor for task logic written in Javascript It is unlikely that this
42 * @author Liam Fallon (liam.fallon@ericsson.com)
44 public class JavascriptTaskExecutor extends TaskExecutor {
45 // Logger for this class
46 private static final XLogger LOGGER = XLoggerFactory.getXLogger(JavascriptTaskExecutor.class);
49 private ScriptEngine engine = new ScriptEngineManager().getEngineByName("JavaScript");
50 private CompiledScript compiled = null;
53 * Prepares the task for processing.
55 * @throws StateMachineException thrown when a state machine execution error occurs
58 public void prepare() throws StateMachineException {
59 // Call generic prepare logic
62 compiled = ((Compilable) engine).compile(getSubject().getTaskLogic().getLogic());
63 } catch (final ScriptException e) {
64 LOGGER.error("execute: task logic failed to compile for task \"" + getSubject().getKey().getId() + "\"");
65 throw new StateMachineException(
66 "task logic failed to compile for task \"" + getSubject().getKey().getId() + "\"", e);
71 * Executes the executor for the task in a sequential manner.
73 * @param executionId the execution ID for the current APEX policy execution
74 * @param executionProperties properties for the current APEX policy execution
75 * @param incomingFields the incoming fields
76 * @return The outgoing fields
77 * @throws StateMachineException on an execution error
78 * @throws ContextException on context errors
81 public Map<String, Object> execute(final long executionId, final Properties executionProperties,
82 final Map<String, Object> incomingFields) throws StateMachineException, ContextException {
83 // Do execution pre work
84 executePre(executionId, executionProperties, incomingFields);
86 // Set up the Javascript engine
87 engine.put("executor", getExecutionContext());
89 // Check and execute the Javascript logic
91 if (compiled == null) {
92 engine.eval(getSubject().getTaskLogic().getLogic());
94 compiled.eval(engine.getContext());
96 } catch (final ScriptException e) {
97 LOGGER.error("execute: task logic failed to run for task \"" + getSubject().getKey().getId() + "\"");
98 throw new StateMachineException(
99 "task logic failed to run for task \"" + getSubject().getKey().getId() + "\"", e);
102 final Object ret = engine.get("returnValue");
104 LOGGER.error("execute: task logic failed to set a return value for task \"" + getSubject().getKey().getId()
106 throw new StateMachineException("execute: task logic failed to set a return value for task \""
107 + getSubject().getKey().getId() + "\"");
110 // Do the execution post work
111 executePost((Boolean) ret);
113 return getOutgoing();
117 * Cleans up the task 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().getTaskLogic().getLogicFlavour()
124 + "," + getSubject().getTaskLogic().getLogic());