content: package act.job;
  
  /*-
   * #%L
   * ACT Framework
   * %%
   * Copyright (C) 2014 - 2019 ActFramework
   * %%
   * 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.
   * #L%
   */
  
  import act.util.AdaptiveBean;
  import act.util.LogSupport;
  
  /**
   * App developer can define `JobExceptionListener` to
   * process the case when an exception is raised during
   * a {@link Job} running.
   */
  public interface JobExceptionListener {
  
      /**
       * A special ID list indicates all Jobs.
       */
      String[] ALL_JOB = {};
  
      /**
       * Returns the id list of jobs that this listener
       * is interested.
       *
       * Only exception happening on the job with id
       * included in the returning list will be routed
       * to the listener.
       *
       * If the listener would like to listen to
       * exception of all jobs, then return an empty
       * array or a `null` array.
       *
       * @return a set of job ids.
       */
      String[] listenTo();
  
      /**
       * Handle exception `e`
       * @param jobId the id of the job that triggered the exception
       * @param e the exception raised in Job execution
       * @return `true` if the exception is handled and framework shall not
       *         proceed with next job exception listener; `false` otherwise.
       */
      boolean handleJobException(String jobId, Exception e);
  
      abstract class Adaptor extends LogSupport implements JobExceptionListener {
      }
  
      abstract class GlobalAdaptor extends Adaptor {
          @Override
          public String[] listenTo() {
              return ALL_JOB;
          }
      }
  }
  