/* 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.camunda.bpm.engine.impl.event;
import java.util.List;
import org.camunda.bpm.engine.ProcessEngineException;
import org.camunda.bpm.engine.impl.bpmn.helper.ScopeUtil;
import org.camunda.bpm.engine.impl.bpmn.parser.BpmnParse;
import org.camunda.bpm.engine.impl.interceptor.CommandContext;
import org.camunda.bpm.engine.impl.persistence.entity.CompensateEventSubscriptionEntity;
import org.camunda.bpm.engine.impl.persistence.entity.EventSubscriptionEntity;
import org.camunda.bpm.engine.impl.persistence.entity.ExecutionEntity;
import org.camunda.bpm.engine.impl.pvm.process.ActivityImpl;
import org.camunda.bpm.engine.impl.pvm.runtime.AtomicOperation;
import static org.camunda.bpm.engine.impl.util.EnsureUtil.ensureNotNull;
/**
* @author Daniel Meyer
*/
public class CompensationEventHandler implements EventHandler {
public final static String EVENT_HANDLER_TYPE = "compensate";
public String getEventHandlerType() {
return EVENT_HANDLER_TYPE;
}
public void handleEvent(EventSubscriptionEntity eventSubscription, Object payload, CommandContext commandContext) {
String configuration = eventSubscription.getConfiguration();
ensureNotNull("Compensating execution not set for compensate event subscription with id " + eventSubscription.getId(), "configuration", configuration);
ExecutionEntity compensatingExecution = commandContext.getExecutionManager()
.findExecutionById(configuration);
ActivityImpl compensationHandler = eventSubscription.getActivity();
if ((compensationHandler.getProperty(BpmnParse.PROPERTYNAME_IS_FOR_COMPENSATION) == null
|| !(Boolean) compensationHandler.getProperty(BpmnParse.PROPERTYNAME_IS_FOR_COMPENSATION))
&& compensationHandler.isScope()) {
// activate execution
compensatingExecution.setActive(true);
// descend into scope:
List<CompensateEventSubscriptionEntity> eventsForThisScope = compensatingExecution.getCompensateEventSubscriptions();
ScopeUtil.throwCompensationEvent(eventsForThisScope, compensatingExecution, false);
} else {
try {
compensatingExecution.setActivity(compensationHandler);
// executing the atomic operation makes sure activity start events are fired
compensatingExecution.performOperation(AtomicOperation.ACTIVITY_START);
} catch (Exception e) {
throw new ProcessEngineException("Error while handling compensation event " + eventSubscription, e);
}
}
}
}