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
020import com.google.protobuf.RpcCallback;
021import com.google.protobuf.RpcController;
022
023import org.apache.yetus.audience.InterfaceAudience;
024
025/**
026 * Client side rpc controller for coprocessor implementation. It is only used to pass error.
027 */
028@InterfaceAudience.Private
029public class ClientCoprocessorRpcController implements RpcController {
030
031  private Throwable error;
032
033  @Override
034  public void reset() {
035  }
036
037  @Override
038  public boolean failed() {
039    return error != null;
040  }
041
042  @Override
043  public String errorText() {
044    return error != null ? error.getMessage() : null;
045  }
046
047  @Override
048  public void startCancel() {
049    throw new UnsupportedOperationException();
050  }
051
052  @Override
053  public void setFailed(String reason) {
054    throw new UnsupportedOperationException();
055  }
056
057  @Override
058  public boolean isCanceled() {
059    return false;
060  }
061
062  @Override
063  public void notifyOnCancel(RpcCallback<Object> callback) {
064    throw new UnsupportedOperationException();
065  }
066
067  public void setFailed(Throwable error) {
068    this.error = error;
069  }
070
071  public Throwable getFailed() {
072    return error;
073  }
074}