View Javadoc

1   /*
2    * Licensed to the Apache Software Foundation (ASF) under one or more
3    * contributor license agreements.  See the NOTICE file distributed with
4    * this work for additional information regarding copyright ownership.
5    * The ASF licenses this file to you under the Apache License, Version 2.0
6    * (the "License"); you may not use this file except in compliance with
7    * the License.  You may obtain a copy of the License at
8    *
9    * http://www.apache.org/licenses/LICENSE-2.0
10   *
11   * Unless required by applicable law or agreed to in writing, software
12   * distributed under the License is distributed on an "AS IS" BASIS,
13   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14   * See the License for the specific language governing permissions and
15   * limitations under the License.
16   */
17  package org.apache.hadoop.hbase.client;
18  
19  import org.apache.hadoop.hbase.TableName;
20  import org.apache.hadoop.hbase.classification.InterfaceAudience;
21  import org.apache.hadoop.hbase.ipc.PayloadCarryingRpcController;
22  import org.apache.hadoop.hbase.ipc.RpcControllerFactory;
23  
24  import java.io.IOException;
25  
26  /**
27   * This class is used to unify HTable calls with AsyncProcess Framework.
28   * HTable can use AsyncProcess directly though this class.
29   */
30  @InterfaceAudience.Private
31  public abstract class PayloadCarryingServerCallable<T>
32      extends RegionServerCallable<T> {
33    protected PayloadCarryingRpcController controller;
34  
35    public PayloadCarryingServerCallable(HConnection connection, TableName tableName, byte[] row,
36      RpcControllerFactory rpcControllerFactory) {
37      super(connection, tableName, row);
38      this.controller = rpcControllerFactory.newController();
39    }
40  
41    public void cancel() {
42      controller.startCancel();
43    }
44  
45    public boolean isCancelled() {
46      return controller.isCanceled();
47    }
48  }