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.storage;
  
  import com.alibaba.wasp.plan.action.DeleteAction;
  import com.alibaba.wasp.plan.action.InsertAction;
  import com.alibaba.wasp.plan.action.UpdateAction;
  import org.apache.hadoop.hbase.client.Delete;
  import org.apache.hadoop.hbase.client.Get;
  import org.apache.hadoop.hbase.client.Put;
  import org.apache.hadoop.hbase.client.Result;
  
  import java.io.IOException;
  
  /**
   * Storage Services
   * 
   */
  public interface StorageServices {
  
    public Result getRow(String entityTableName, Get get) throws IOException,
        StorageTableNotFoundException;
  
    public Result getRowBeforeDelete(DeleteAction delete, String entityTableName,
                                     Get get) throws IOException, StorageTableNotFoundException;
  
    public void putRow(String entityTableName, Put put) throws IOException,
        StorageTableNotFoundException;
  
    public void deleteRow(String entityTableName, Delete delete)
        throws IOException, StorageTableNotFoundException;
  
    // Before insert, check if the row exists
    public void checkRowExistsBeforeInsert(InsertAction insert,
                                           String entityTableName, Put entityPut) throws IOException,
        StorageTableNotFoundException;
  
    // Before update, get the row
    public Result getRowBeforeUpdate(UpdateAction update, String entityTableName,
                                     Get get) throws IOException, StorageTableNotFoundException;
  
  }