code: /*
   * Copyright © 2014-2017 EntIT Software LLC, a Micro Focus company (L.P.)
   *
   * 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 io.cloudslang.orchestrator.entities;
  
  import java.io.Serializable;
  import java.util.List;
  
  /**
   * Date: 12/3/13
   *
   *
   * An in interface for messages in the execution buffers
   */
  public interface Message extends Serializable{
      /**
       *
       * return the id of the message
       *
       * @return the id of the message
       */
  	String getId();
  
      /**
       *
       * return the weight of the message
       * used for thresholds in the buffers
       *
       * @return the weight of the message
       */
  	int getWeight();
  
      /**
       *
       * shrinks a list of {@link Message} if possible
       *
       * @param messages list of {@link Message} to shrink
       * @return list of {@link Message} after shrinking
       */
  	List<Message> shrink(List<Message> messages);
  }
  