/* 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.cmd;
import org.activiti.engine.ActivitiTaskAlreadyClaimedException;
import org.activiti.engine.impl.interceptor.CommandContext;
import org.activiti.engine.impl.persistence.entity.TaskEntity;
/**
* @author Joram Barrez
*/
public class ClaimTaskCmd extends NeedsActiveTaskCmd<Void> {
private static final long serialVersionUID = 1L;
protected String userId;
public ClaimTaskCmd(String taskId, String userId) {
super(taskId);
this.userId = userId;
}
protected Void execute(CommandContext commandContext, TaskEntity task) {
if(userId != null) {
if (task.getAssignee() != null) {
if(!task.getAssignee().equals(userId)) {
// When the task is already claimed by another user, throw exception. Otherwise, ignore
// this, post-conditions of method already met.
throw new ActivitiTaskAlreadyClaimedException(task.getId(), task.getAssignee());
}
} else {
task.setAssignee(userId);
}
} else {
// Task should be assigned to no one
task.setAssignee(null);
}
return null;
}
@Override
protected String getSuspendedTaskException() {
return "Cannot claim a suspended task";
}
}