content: /*
   * Copyright 2010-2025 Hyland Software, Inc. and its affiliates.
   *
   * 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 java.io.Serializable;
  import org.activiti.engine.ActivitiIllegalArgumentException;
  import org.activiti.engine.delegate.event.ActivitiEventType;
  import org.activiti.engine.delegate.event.impl.ActivitiEventBuilder;
  import org.activiti.engine.impl.interceptor.Command;
  import org.activiti.engine.impl.interceptor.CommandContext;
  import org.activiti.engine.runtime.Job;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  /**
  
  
   */
  public class ExecuteAsyncJobCmd implements Command<Object>, Serializable {
  
      private static final long serialVersionUID = 1L;
  
      private static Logger log = LoggerFactory.getLogger(ExecuteAsyncJobCmd.class);
  
      protected String jobId;
  
      public ExecuteAsyncJobCmd(String jobId) {
          this.jobId = jobId;
      }
  
      public Object execute(CommandContext commandContext) {
          if (jobId == null) {
              throw new ActivitiIllegalArgumentException("jobId is null");
          }
  
          // We need to refetch the job, as it could have been deleted by another concurrent job
          // For exampel: an embedded subprocess with a couple of async tasks and a timer on the boundary of the subprocess
          // when the timer fires, all executions and thus also the jobs inside of the embedded subprocess are destroyed.
          // However, the async task jobs could already have been fetched and put in the queue.... while in reality they have been deleted.
          // A refetch is thus needed here to be sure that it exists for this transaction.
  
          Job job = commandContext.getJobEntityManager().findById(jobId);
          if (job == null) {
              log.debug(
                  "Job does not exist anymore and will not be executed. It has most likely been deleted " +
                  "as part of another concurrent part of the process instance."
              );
              return null;
          }
  
          if (log.isDebugEnabled()) {
              log.debug("Executing async job {}", job.getId());
          }
  
          executeInternal(commandContext, job);
          return null;
      }
  
      protected void executeInternal(CommandContext commandContext, Job job) {
          commandContext.getJobManager().execute(job);
  
          if (commandContext.getEventDispatcher().isEnabled()) {
              commandContext
                  .getEventDispatcher()
                  .dispatchEvent(ActivitiEventBuilder.createEntityEvent(ActivitiEventType.JOB_EXECUTION_SUCCESS, job));
          }
      }
  }
  