/* 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.cdi.impl.event;
import java.io.Serializable;
import java.lang.annotation.Annotation;
import java.util.Date;
import javax.enterprise.inject.spi.BeanManager;
import org.activiti.cdi.BusinessProcessEvent;
import org.activiti.cdi.BusinessProcessEventType;
import org.activiti.cdi.annotation.event.AssignTaskLiteral;
import org.activiti.cdi.annotation.event.BusinessProcessLiteral;
import org.activiti.cdi.annotation.event.CompleteTaskLiteral;
import org.activiti.cdi.annotation.event.CreateTaskLiteral;
import org.activiti.cdi.annotation.event.DeleteTaskLiteral;
import org.activiti.cdi.impl.util.BeanManagerLookup;
import org.activiti.cdi.impl.util.ProgrammaticBeanLookup;
import org.activiti.engine.ActivitiException;
import org.activiti.engine.ProcessEngine;
import org.activiti.engine.delegate.DelegateTask;
import org.activiti.engine.delegate.TaskListener;
import org.activiti.engine.impl.context.Context;
import org.activiti.engine.repository.ProcessDefinition;
/**
* Generic {@link TaskListener} publishing events using the cdi event
* infrastructure.
*
* @author Dimitris Mandalidis
*/
public class CdiTaskListener implements TaskListener, Serializable {
private static final long serialVersionUID = 1L;
protected final BusinessProcessEventType type;
protected final String transitionName;
protected final String activityId;
public CdiTaskListener(String transitionName) {
this.type = BusinessProcessEventType.TAKE;
this.transitionName = transitionName;
this.activityId = null;
}
public CdiTaskListener(String activityId, BusinessProcessEventType type) {
this.type = type;
this.transitionName = null;
this.activityId = activityId;
}
@Override
public void notify(DelegateTask task) {
// test whether cdi is setup correclty. (if not, just do not deliver the event)
try {
ProgrammaticBeanLookup.lookup(ProcessEngine.class);
}catch (Exception e) {
return;
}
BusinessProcessEvent event = createEvent(task);
Annotation[] qualifiers = getQualifiers(event);
getBeanManager().fireEvent(event, qualifiers);
}
protected BusinessProcessEvent createEvent(DelegateTask task) {
ProcessDefinition processDefinition = Context.getProcessEngineConfiguration().getProcessDefinitionCache().get(task.getExecution().getProcessDefinitionId());
return new CdiBusinessProcessEvent(activityId, transitionName, processDefinition, task, type, task.getExecution().getProcessInstanceId(), task.getExecutionId(), new Date());
}
protected BeanManager getBeanManager() {
BeanManager bm = BeanManagerLookup.getBeanManager();
if (bm == null) {
throw new ActivitiException("No cdi bean manager avaiable, cannot publish event.");
}
return bm;
}
protected Annotation[] getQualifiers(BusinessProcessEvent event) {
Annotation businessProcessQualifier = new BusinessProcessLiteral(event.getProcessDefinition().getKey());
if (type == BusinessProcessEventType.CREATE_TASK) {
return new Annotation[] {businessProcessQualifier, new CreateTaskLiteral(activityId) };
}
if (type == BusinessProcessEventType.ASSIGN_TASK) {
return new Annotation[] {businessProcessQualifier, new AssignTaskLiteral(activityId) };
}
if (type == BusinessProcessEventType.COMPLETE_TASK) {
return new Annotation[] {businessProcessQualifier, new CompleteTaskLiteral(activityId) };
}
if (type == BusinessProcessEventType.DELETE_TASK) {
return new Annotation[] {businessProcessQualifier, new DeleteTaskLiteral(activityId) };
}
return new Annotation[] {};
}
}