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.jruby;
24 import java.util.Properties;
26 import java.util.TreeSet;
28 import org.jruby.embed.EmbedEvalUnit;
29 import org.jruby.embed.LocalContextScope;
30 import org.jruby.embed.LocalVariableBehavior;
31 import org.jruby.embed.ScriptingContainer;
32 import org.jruby.runtime.builtin.IRubyObject;
33 import org.onap.policy.apex.context.ContextException;
34 import org.onap.policy.apex.core.engine.event.EnEvent;
35 import org.onap.policy.apex.core.engine.executor.TaskSelectExecutor;
36 import org.onap.policy.apex.core.engine.executor.exception.StateMachineException;
37 import org.onap.policy.apex.model.basicmodel.concepts.AxArtifactKey;
38 import org.slf4j.ext.XLogger;
39 import org.slf4j.ext.XLoggerFactory;
42 * The Class JrubyTaskSelectExecutor is the task selection executor for task selection logic written in JRuby.
44 * @author Liam Fallon (liam.fallon@ericsson.com)
46 public class JrubyTaskSelectExecutor extends TaskSelectExecutor {
47 // Logger for this class
48 private static final XLogger LOGGER = XLoggerFactory.getXLogger(JrubyTaskSelectExecutor.class);
51 private ScriptingContainer container = new ScriptingContainer(LocalContextScope.CONCURRENT,
52 LocalVariableBehavior.TRANSIENT, true);
53 private EmbedEvalUnit parsedjruby = null;
56 * Prepares the task for processing.
58 * @throws StateMachineException thrown when a state machine execution error occurs
61 public void prepare() throws StateMachineException {
62 // Call generic prepare logic
65 // Set up the JRuby engine
66 container = (container == null)
67 ? new ScriptingContainer(LocalContextScope.CONCURRENT, LocalVariableBehavior.TRANSIENT, true)
70 // Use the container.setError(System.err) and container.setOutput(System.out) method calls to redirect output
71 // and error to standard output and error for debugging
73 container.put("executor", getExecutionContext()); // needed for compile as a placeholder
74 parsedjruby = container.parse(getSubject().getTaskSelectionLogic().getLogic());
78 * Executes the executor for the task in a sequential manner.
80 * @param executionId the execution ID for the current APEX policy execution
81 * @param executionProperties properties for the current APEX policy execution
82 * @param incomingEvent the incoming event
83 * @return The outgoing event
84 * @throws StateMachineException on an execution error
85 * @throws ContextException on context errors
88 public AxArtifactKey execute(final long executionId, final Properties executionProperties,
89 final EnEvent incomingEvent) throws StateMachineException, ContextException {
90 // Do execution pre work
91 executePre(executionId, executionProperties, incomingEvent);
93 // Check and execute the JRuby logic
94 container.put("executor", getExecutionContext());
96 /* Precompiled version */
97 boolean returnValue = false;
98 final IRubyObject ret = parsedjruby.run();
100 final Boolean retbool = ret.toJava(java.lang.Boolean.class);
101 if (retbool != null) {
106 // Do the execution post work
107 executePost(returnValue);
109 // Send back the return event
110 return getOutgoing();
114 * Cleans up the task after processing.
116 * @throws StateMachineException thrown when a state machine execution error occurs
119 public void cleanUp() throws StateMachineException {
120 LOGGER.debug("cleanUp:" + getSubject().getKey().getId() + ","
121 + getSubject().getTaskSelectionLogic().getLogicFlavour() + ","
122 + getSubject().getTaskSelectionLogic().getLogic());
123 container.terminate();
128 * Gets the output event set.
130 * @return the output event set
132 public Set<AxArtifactKey> getOutputEventSet() {
133 return new TreeSet<>();