001/**
002 * Licensed to the Apache Software Foundation (ASF) under one
003 * or more contributor license agreements.  See the NOTICE file
004 * distributed with this work for additional information
005 * regarding copyright ownership.  The ASF licenses this file
006 * to you under the Apache License, Version 2.0 (the
007 * "License"); you may not use this file except in compliance
008 * with the License.  You may obtain a copy of the License at
009 *
010 *     http://www.apache.org/licenses/LICENSE-2.0
011 *
012 * Unless required by applicable law or agreed to in writing, software
013 * distributed under the License is distributed on an "AS IS" BASIS,
014 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
015 * See the License for the specific language governing permissions and
016 * limitations under the License.
017 */
018package org.apache.hadoop.hbase.client;
019
020
021import org.apache.yetus.audience.InterfaceAudience;
022
023import org.apache.hbase.thirdparty.com.google.protobuf.RpcCallback;
024import org.apache.hbase.thirdparty.com.google.protobuf.RpcController;
025
026/**
027 * Client side rpc controller for coprocessor implementation. It is only used to pass error.
028 */
029@InterfaceAudience.Private
030public class ClientCoprocessorRpcController implements RpcController {
031
032  private Throwable error;
033
034  @Override
035  public void reset() {
036  }
037
038  @Override
039  public boolean failed() {
040    return error != null;
041  }
042
043  @Override
044  public String errorText() {
045    return error != null ? error.getMessage() : null;
046  }
047
048  @Override
049  public void startCancel() {
050    throw new UnsupportedOperationException();
051  }
052
053  @Override
054  public void setFailed(String reason) {
055    throw new UnsupportedOperationException();
056  }
057
058  @Override
059  public boolean isCanceled() {
060    return false;
061  }
062
063  @Override
064  public void notifyOnCancel(RpcCallback<Object> callback) {
065    throw new UnsupportedOperationException();
066  }
067
068  public void setFailed(Throwable error) {
069    this.error = error;
070  }
071
072  public Throwable getFailed() {
073    return error;
074  }
075}