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