/* 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.activiti.engine.impl.bpmn.helper;
import java.util.List;
import org.activiti.engine.ActivitiIllegalArgumentException;
import org.activiti.engine.delegate.event.ActivitiEvent;
import org.activiti.engine.delegate.event.ActivitiEventListener;
import org.activiti.engine.impl.context.Context;
import org.activiti.engine.impl.event.MessageEventHandler;
import org.activiti.engine.impl.interceptor.CommandContext;
import org.activiti.engine.impl.persistence.entity.EventSubscriptionEntity;
/**
* An {@link ActivitiEventListener} that throws a message event when an event is
* dispatched to it. Sends the message to the execution the event was fired from. If the execution
* is not subscribed to a message, the process-instance is checked.
*
* @author Frederik Heremans
*
*/
public class MessageThrowingEventListener extends BaseDelegateEventListener {
protected String messageName;
protected Class<?> entityClass;
@Override
public void onEvent(ActivitiEvent event) {
if(isValidEvent(event)) {
if (event.getProcessInstanceId() == null) {
throw new ActivitiIllegalArgumentException(
"Cannot throw process-instance scoped message, since the dispatched event is not part of an ongoing process instance");
}
CommandContext commandContext = Context.getCommandContext();
List<EventSubscriptionEntity> subscriptionEntities = commandContext.getEventSubscriptionEntityManager()
.findEventSubscriptionsByNameAndExecution(MessageEventHandler.EVENT_HANDLER_TYPE, messageName, event.getExecutionId());
// Revert to messaging the process instance
if(subscriptionEntities.isEmpty() && event.getProcessInstanceId() != null && !event.getExecutionId().equals(event.getProcessInstanceId())) {
subscriptionEntities = commandContext.getEventSubscriptionEntityManager()
.findEventSubscriptionsByNameAndExecution(MessageEventHandler.EVENT_HANDLER_TYPE, messageName, event.getProcessInstanceId());
}
for (EventSubscriptionEntity signalEventSubscriptionEntity : subscriptionEntities) {
signalEventSubscriptionEntity.eventReceived(null, false);
}
}
}
public void setMessageName(String messageName) {
this.messageName = messageName;
}
@Override
public boolean isFailOnException() {
return true;
}
}