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/*
 * Copyright Camunda Services GmbH and/or licensed to Camunda Services GmbH
 * under one or more contributor license agreements. See the NOTICE file
 * distributed with this work for additional information regarding copyright
 * ownership. Camunda licenses this file to you under the Apache License,
 * Version 2.0; 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.cmd;

import static org.camunda.bpm.engine.impl.util.EnsureUtil.ensureNotNull;

import java.io.Serializable;

import org.camunda.bpm.engine.ProcessEngineException;
import org.camunda.bpm.engine.history.UserOperationLogEntry;
import org.camunda.bpm.engine.impl.cfg.CommandChecker;
import org.camunda.bpm.engine.impl.interceptor.Command;
import org.camunda.bpm.engine.impl.interceptor.CommandContext;
import org.camunda.bpm.engine.impl.persistence.entity.JobEntity;
import org.camunda.bpm.engine.impl.persistence.entity.PropertyChange;

/**
 * @author Saeid Mirzaei
 * @author Joram Barrez
 */

public class DeleteJobCmd implements Command, Serializable {

  private static final long serialVersionUID = 1L;

  protected String jobId;

  public DeleteJobCmd(String jobId) {
    this.jobId = jobId;
  }

  public Object execute(CommandContext commandContext) {
    ensureNotNull("jobId", jobId);

    JobEntity job = commandContext.getJobManager().findJobById(jobId);
    ensureNotNull("No job found with id '" + jobId + "'", "job", job);

    for(CommandChecker checker : commandContext.getProcessEngineConfiguration().getCommandCheckers()) {
      checker.checkUpdateJob(job);
    }
    // We need to check if the job was locked, ie acquired by the job acquisition thread
    // This happens if the the job was already acquired, but not yet executed.
    // In that case, we can't allow to delete the job.
    if (job.getLockOwner() != null || job.getLockExpirationTime() != null) {
      throw new ProcessEngineException("Cannot delete job when the job is being executed. Try again later.");
    }

    commandContext.getOperationLogManager().logJobOperation(UserOperationLogEntry.OPERATION_TYPE_DELETE, jobId, 
        job.getJobDefinitionId(), job.getProcessInstanceId(), job.getProcessDefinitionId(), 
        job.getProcessDefinitionKey(), PropertyChange.EMPTY_CHANGE);
    
    job.delete();
    return null;
  }

}
 















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