content: /**
   * Licensed to the Apache Software Foundation (ASF) under one
   * or more contributor license agreements.  See the NOTICE file
   * distributed with this work for additional information
   * regarding copyright ownership.  The ASF licenses this file
   * to you 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 com.alibaba.wasp.master;
  
  import com.alibaba.wasp.EntityGroupInfo;
  import com.alibaba.wasp.ServerName;
  
  
  /**
   * Protocol that FServer/FClient communicate with the FMETA server(FMaster)
   */
  public interface FMetaServerProtocol {
    public static final long VERSION = 1L;
  
    /**
     * Adds a FMETA row for the specified new entityGroup.
     */
    public void addEntityGroupToMeta(EntityGroupInfo entityGroupInfo);
  
    /**
     * Updates the location of the specified entityGroup in FMETA to be the
     * specified server hostname and startcode.
     */
    public void updateEntityGroupLocation(ServerName serverName);
  
    /**
     * Deletes the specified entityGroup from FMETA.
     */
    public void deleteEntityGroup(EntityGroupInfo entityGroupInfo);
  
    /**
     * Offline parent and two daughters qualifier in FMETA. Used when splitting.
     */
    public void offlineParentInMeta(EntityGroupInfo parentEntityGroup);
  
    /**
     * Adds two daughters entityGroup with location in FMETA.
     */
    public void addDaughter(EntityGroupInfo daugherA, EntityGroupInfo daugherB);
  
  }
  