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