content: package act.job;
  
  /*-
   * #%L
   * ACT Framework
   * %%
   * Copyright (C) 2014 - 2017 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 java.lang.annotation.ElementType;
  import java.lang.annotation.Retention;
  import java.lang.annotation.RetentionPolicy;
  import java.lang.annotation.Target;
  
  /**
   * Mark a method to be a cron job. The method must be public and has no parameters. If
   * the method is virtual then the class declared the method must have a public constructor
   * without parameter
   */
  @Retention(RetentionPolicy.CLASS)
  @Target(ElementType.METHOD)
  public @interface Cron {
      /**
       * Specifies cron expression or a configuration key starts with {@code "cron."}
       */
      String value();
  
      /**
       * Specify the ID of the scheduled job. Default value: empty string
       * @return the job id
       */
      String id() default "";
  
      String CRON_12AM = "0 0 0 * * *";
      String CRON_MIDNIGHT = CRON_12AM;
      String CRON_2AM = "0 0 2 * * *";
      String CRON_8AM = "0 0 8 * * *";
      String CRON_MORNING = CRON_8AM;
      String CRON_12PM = "0 0 12 * * *";
      String CRON_NOON = CRON_12PM;
      String CRON_6PM = "0 0 18 * * *";
      String CRON_10PM = "0 0 22 * * *";
  }
  