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 javax.script.Compilable;
26 import javax.script.CompiledScript;
27 import javax.script.ScriptEngine;
28 import javax.script.ScriptEngineManager;
29 import javax.script.ScriptException;
30 import org.onap.policy.apex.context.ContextException;
31 import org.onap.policy.apex.core.engine.executor.StateFinalizerExecutor;
32 import org.onap.policy.apex.core.engine.executor.exception.StateMachineException;
33 import org.slf4j.ext.XLogger;
34 import org.slf4j.ext.XLoggerFactory;
37 * The Class JavascriptStateFinalizerExecutor is the state finalizer executor for state finalizer
38 * logic written in Javascript It is unlikely that this is thread safe.
40 * @author Liam Fallon (liam.fallon@ericsson.com)
42 public class JavascriptStateFinalizerExecutor extends StateFinalizerExecutor {
43 // Logger for this class
44 private static final XLogger LOGGER = XLoggerFactory.getXLogger(JavascriptStateFinalizerExecutor.class);
47 private ScriptEngine engine = new ScriptEngineManager().getEngineByName("JavaScript");
48 private CompiledScript compiled = null;
51 * Prepares the state finalizer for processing.
53 * @throws StateMachineException thrown when a state machine execution error occurs
56 public void prepare() throws StateMachineException {
57 // Call generic prepare logic
60 compiled = ((Compilable) engine).compile(getSubject().getLogic());
61 } catch (final ScriptException e) {
62 LOGGER.error("execute: state finalizer logic failed to compile for state finalizer \""
63 + getSubject().getKey().getId() + "\"");
64 throw new StateMachineException("state finalizer logic failed to compile for state finalizer \""
65 + getSubject().getKey().getId() + "\"", e);
70 * Executes the executor for the state finalizer logic in a sequential manner.
72 * @param executionId the execution ID for the current APEX policy execution
73 * @param incomingFields the incoming fields for finalisation
74 * @return The state output for the state
75 * @throws StateMachineException on an execution error
76 * @throws ContextException on context errors
79 public String execute(final long executionId, final Map<String, Object> incomingFields)
80 throws StateMachineException, ContextException {
81 // Do execution pre work
82 executePre(executionId, incomingFields);
84 // Set up the Javascript engine
85 engine.put("executor", getExecutionContext());
87 // Check and execute the Javascript logic
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());