/* 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.history.parser;
import org.camunda.bpm.engine.delegate.DelegateTask;
import org.camunda.bpm.engine.delegate.TaskListener;
import org.camunda.bpm.engine.impl.context.Context;
import org.camunda.bpm.engine.impl.history.HistoryLevel;
import org.camunda.bpm.engine.impl.history.event.HistoryEvent;
import org.camunda.bpm.engine.impl.history.handler.HistoryEventHandler;
import org.camunda.bpm.engine.impl.history.producer.HistoryEventProducer;
import org.camunda.bpm.engine.impl.persistence.entity.ExecutionEntity;
import org.camunda.bpm.engine.impl.persistence.entity.TaskEntity;
/**
* <p>A {@link TaskListener} implementation that delegates to a
* {@link HistoryEventProducer}.
*
* @author Daniel Meyer
*
*/
public abstract class HistoryTaskListener implements TaskListener {
protected final HistoryEventProducer eventProducer;
protected HistoryLevel historyLevel;
public HistoryTaskListener(HistoryEventProducer historyEventProducer, HistoryLevel historyLevel) {
this.eventProducer = historyEventProducer;
this.historyLevel = historyLevel;
}
public void notify(DelegateTask task) {
// get the event handler
final HistoryEventHandler historyEventHandler = Context.getProcessEngineConfiguration()
.getHistoryEventHandler();
ExecutionEntity execution = ((TaskEntity) task).getExecution();
if (execution != null) {
// delegate creation of the history event to the producer
HistoryEvent historyEvent = createHistoryEvent(task, execution);
if(historyEvent != null) {
// pass the event to the handler
historyEventHandler.handleEvent(historyEvent);
}
}
}
protected abstract HistoryEvent createHistoryEvent(DelegateTask task, ExecutionEntity execution);
}