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/*-
* ============LICENSE_START=======================================================
* Copyright (C) 2016-2018 Ericsson. All rights reserved.
* ================================================================================
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
* SPDX-License-Identifier: Apache-2.0
* ============LICENSE_END=========================================================
*/
package org.onap.policy.apex.plugins.executor.jruby;
import java.util.Set;
import java.util.TreeSet;
import org.jruby.embed.EmbedEvalUnit;
import org.jruby.embed.LocalContextScope;
import org.jruby.embed.LocalVariableBehavior;
import org.jruby.embed.ScriptingContainer;
import org.jruby.runtime.builtin.IRubyObject;
import org.onap.policy.apex.context.ContextException;
import org.onap.policy.apex.core.engine.event.EnEvent;
import org.onap.policy.apex.core.engine.executor.TaskSelectExecutor;
import org.onap.policy.apex.core.engine.executor.exception.StateMachineException;
import org.onap.policy.apex.model.basicmodel.concepts.AxArtifactKey;
import org.slf4j.ext.XLogger;
import org.slf4j.ext.XLoggerFactory;
/**
* The Class JrubyTaskSelectExecutor is the task selection executor for task selection logic written in JRuby.
*
* @author Liam Fallon (liam.fallon@ericsson.com)
*/
public class JrubyTaskSelectExecutor extends TaskSelectExecutor {
// Logger for this class
private static final XLogger LOGGER = XLoggerFactory.getXLogger(JrubyTaskSelectExecutor.class);
// Jruby container
private ScriptingContainer container =
new ScriptingContainer(LocalContextScope.CONCURRENT, LocalVariableBehavior.TRANSIENT, true);
private EmbedEvalUnit parsedjruby = null;
/**
* Prepares the task for processing.
*
* @throws StateMachineException thrown when a state machine execution error occurs
*/
@Override
public void prepare() throws StateMachineException {
// Call generic prepare logic
super.prepare();
// Set up the JRuby engine
container = (container == null)
? new ScriptingContainer(LocalContextScope.CONCURRENT, LocalVariableBehavior.TRANSIENT, true)
: container;
container.put("executor", getExecutionContext()); // needed for compile as a placeholder
parsedjruby = container.parse(getSubject().getTaskSelectionLogic().getLogic());
}
/**
* Executes the executor for the task in a sequential manner.
*
* @param executionId the execution ID for the current APEX policy execution
* @param incomingEvent the incoming event
* @return The outgoing event
* @throws StateMachineException on an execution error
* @throws ContextException on context errors
*/
@Override
public AxArtifactKey execute(final long executionId, final EnEvent incomingEvent)
throws StateMachineException, ContextException {
// Do execution pre work
executePre(executionId, incomingEvent);
// Check and execute the JRuby logic
container.put("executor", getExecutionContext());
/* Precompiled version */
boolean returnValue = false;
final IRubyObject ret = parsedjruby.run();
if (ret != null) {
final Boolean retbool = ret.toJava(java.lang.Boolean.class);
if (retbool != null) {
returnValue = true;
}
}
// Do the execution post work
executePost(returnValue);
// Send back the return event
return getOutgoing();
}
/**
* Cleans up the task after processing.
*
* @throws StateMachineException thrown when a state machine execution error occurs
*/
@Override
public void cleanUp() throws StateMachineException {
LOGGER.debug("cleanUp:" + getSubject().getKey().getId() + ","
+ getSubject().getTaskSelectionLogic().getLogicFlavour() + ","
+ getSubject().getTaskSelectionLogic().getLogic());
container.terminate();
container = null;
}
/**
* Gets the output event set.
*
* @return the output event set
*/
public Set<AxArtifactKey> getOutputEventSet() {
return new TreeSet<>();
}
}
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