/* | |
* Copyright 2012 International Business Machines Corp. | |
* | |
* See the NOTICE file distributed with this work for additional information | |
* regarding copyright ownership. 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. | |
*/ | |
package org.apache.batchee.container.impl.controller; | |
import org.apache.batchee.container.ExecutionElementController; | |
import org.apache.batchee.container.exception.BatchContainerRuntimeException; | |
import org.apache.batchee.container.impl.controller.chunk.ExceptionConfig; | |
import org.apache.batchee.container.impl.jobinstance.RuntimeJobExecution; | |
import org.apache.batchee.container.jsl.ExecutionElement; | |
import org.apache.batchee.container.proxy.InjectionReferences; | |
import org.apache.batchee.container.proxy.ProxyFactory; | |
import org.apache.batchee.container.services.ServicesManager; | |
import org.apache.batchee.container.status.ExecutionStatus; | |
import org.apache.batchee.container.status.ExtendedBatchStatus; | |
import org.apache.batchee.jaxb.Decision; | |
import org.apache.batchee.jaxb.Property; | |
import org.apache.batchee.spi.BatchArtifactFactory; | |
import org.apache.batchee.spi.PersistenceManagerService; | |
import javax.batch.api.Decider; | |
import javax.batch.runtime.StepExecution; | |
import java.util.List; | |
public class DecisionController implements ExecutionElementController { | |
private RuntimeJobExecution jobExecution; | |
private Decision decision; | |
private StepExecution[] previousStepExecutions = null; | |
private final PersistenceManagerService persistenceService; | |
private final BatchArtifactFactory factory; | |
public DecisionController(final RuntimeJobExecution jobExecution, final Decision decision, final ServicesManager manager) { | |
this.jobExecution = jobExecution; | |
this.decision = decision; | |
this.persistenceService = manager.service(PersistenceManagerService.class); | |
this.factory = manager.service(BatchArtifactFactory.class); | |
} | |
@Override | |
public ExecutionStatus execute() { | |
final String deciderId = decision.getRef(); | |
final List<Property> propList = (decision.getProperties() == null) ? null : decision.getProperties().getPropertyList(); | |
//Create a decider proxy and inject the associated properties | |
/* Set the contexts associated with this scope */ | |
//job context is always in scope | |
//the parent controller will only pass one valid context to a decision controller | |
//so two of these contexts will always be null | |
final InjectionReferences injectionRef = new InjectionReferences(jobExecution.getJobContext(), null, propList); | |
final Decider deciderProxy = ProxyFactory.createDeciderProxy(factory, deciderId, injectionRef, jobExecution); | |
String exitStatus = null; | |
try { | |
exitStatus = deciderProxy.decide(this.previousStepExecutions); | |
} catch (Exception e) { | |
ExceptionConfig.wrapBatchException(e); | |
} | |
//Set the value returned from the decider as the job context exit status. | |
this.jobExecution.getJobContext().setExitStatus(exitStatus); | |
return new ExecutionStatus(ExtendedBatchStatus.NORMAL_COMPLETION, exitStatus); | |
} | |
protected void setPreviousStepExecutions(ExecutionElement previousExecutionElement, ExecutionElementController previousElementController) { | |
if (previousExecutionElement == null) { | |
// only job context is available to the decider | |
} else if (previousExecutionElement instanceof Decision) { | |
throw new BatchContainerRuntimeException("A decision cannot precede another decision."); | |
} | |
List<Long> previousStepExecsIds = previousElementController.getLastRunStepExecutions(); | |
StepExecution[] stepExecArray = new StepExecution[previousStepExecsIds.size()]; | |
for (int i = 0; i < stepExecArray.length; i++) { | |
StepExecution stepExec = persistenceService.getStepExecutionByStepExecutionId(previousStepExecsIds.get(i)); | |
stepExecArray[i] = stepExec; | |
} | |
this.previousStepExecutions = stepExecArray; | |
} | |
@Override | |
public void stop() { | |
// no-op | |
} | |
@Override | |
public List<Long> getLastRunStepExecutions() { | |
// TODO Auto-generated method stub | |
return null; | |
} | |
} |