/*
    * 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 org.apache.hadoop.hbase.client;
  
  import org.apache.hadoop.hbase.HConstants;
  import org.apache.hadoop.hbase.TableName;
  import org.apache.hadoop.hbase.classification.InterfaceAudience;
  import org.apache.hadoop.hbase.ipc.HBaseRpcController;
  import org.apache.hadoop.hbase.ipc.RpcControllerFactory;
  
  /**
   * This class is used to unify HTable calls with AsyncProcess Framework.
   * HTable can use AsyncProcess directly though this class.
   */
  @InterfaceAudience.Private
  public abstract class PayloadCarryingServerCallable<T>
      extends RegionServerCallable<T> implements Cancellable {
    protected HBaseRpcController controller;
  
    public PayloadCarryingServerCallable(Connection connection, TableName tableName, byte[] row,
        RpcControllerFactory rpcControllerFactory) {
      this(connection, tableName, row, rpcControllerFactory, HConstants.NORMAL_QOS);
    }
  
    public PayloadCarryingServerCallable(Connection connection, TableName tableName, byte[] row,
      RpcControllerFactory rpcControllerFactory, int priority) {
      super(connection, tableName, row, priority);
      this.controller = rpcControllerFactory.newController();
    }
  
    @Override
    public void cancel() {
      controller.startCancel();
    }
  
    @Override
    public boolean isCancelled() {
      return controller.isCanceled();
    }
  }