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 */
018
019package org.apache.hadoop.hbase.client;
020
021import java.io.Closeable;
022import java.io.IOException;
023
024import org.apache.hadoop.hbase.shaded.protobuf.ProtobufUtil;
025
026/**
027 * A RetryingCallable for RPC connection operations.
028 * @param <V> return type
029 */
030abstract class RpcRetryingCallable<V> implements RetryingCallable<V>, Closeable {
031  @Override
032  public void prepare(boolean reload) throws IOException {
033  }
034
035  @Override
036  public void close() throws IOException {
037  }
038
039  @Override
040  public void throwable(Throwable t, boolean retrying) {
041  }
042
043  @Override
044  public String getExceptionMessageAdditionalDetail() {
045    return "";
046  }
047
048  @Override
049  public long sleep(long pause, int tries) {
050    return ConnectionUtils.getPauseTime(pause, tries);
051  }
052
053  @Override
054  // Same trick as in RegionServerCallable so users don't have to copy/paste so much boilerplate
055  // and so we contain references to protobuf.
056  public V call(int callTimeout) throws IOException {
057    try {
058      return rpcCall(callTimeout);
059    } catch (Exception e) {
060      throw ProtobufUtil.handleRemoteException(e);
061    }
062  }
063
064  protected abstract V rpcCall(int callTimeout) throws Exception;
065}