hbase-server/src/test/java/org/apache/hadoop/hbase/client/SleepAtFirstRpcCall.java

   1 /**
   2  * Licensed to the Apache Software Foundation (ASF) under one
   3  * or more contributor license agreements.  See the NOTICE file
   4  * distributed with this work for additional information
   5  * regarding copyright ownership.  The ASF licenses this file
   6  * to you under the Apache License, Version 2.0 (the
   7  * "License"); you may not use this file except in compliance
   8  * with the License.  You may obtain a copy of the License at
   9  *
  10  *     http://www.apache.org/licenses/LICENSE-2.0
  11  *
  12  * Unless required by applicable law or agreed to in writing, software
  13  * distributed under the License is distributed on an "AS IS" BASIS,
  14  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  15  * See the License for the specific language governing permissions and
  16  * limitations under the License.
  17  */
  18 package org.apache.hadoop.hbase.client;
  19
  20 import java.io.IOException;
  21 import java.util.Optional;
  22 import java.util.concurrent.atomic.AtomicLong;
  23 import org.apache.hadoop.conf.Configuration;
  24 import org.apache.hadoop.hbase.coprocessor.ObserverContext;
  25 import org.apache.hadoop.hbase.coprocessor.RegionCoprocessor;
  26 import org.apache.hadoop.hbase.coprocessor.RegionCoprocessorEnvironment;
  27 import org.apache.hadoop.hbase.coprocessor.RegionObserver;
  28 import org.apache.hadoop.hbase.util.Threads;
  29
  30 /**
  31  * This coproceesor sleep 2s at first increment/append rpc call.
  32  */
  33 public class SleepAtFirstRpcCall implements RegionCoprocessor, RegionObserver {
  34   static final AtomicLong ct = new AtomicLong(0);
  35   static final String SLEEP_TIME_CONF_KEY = "hbase.coprocessor.SleepAtFirstRpcCall.sleepTime";
  36   static final long DEFAULT_SLEEP_TIME = 2000;
  37   static final AtomicLong sleepTime = new AtomicLong(DEFAULT_SLEEP_TIME);
  38
  39   @Override
  40   public Optional<RegionObserver> getRegionObserver() {
  41     return Optional.of(this);
  42   }
  43
  44   public SleepAtFirstRpcCall() {
  45   }
  46
  47   @Override
  48   public void postOpen(ObserverContext<RegionCoprocessorEnvironment> c) {
  49     RegionCoprocessorEnvironment env = c.getEnvironment();
  50     Configuration conf = env.getConfiguration();
  51     sleepTime.set(conf.getLong(SLEEP_TIME_CONF_KEY, DEFAULT_SLEEP_TIME));
  52   }
  53
  54   @Override
  55   public Result postIncrement(final ObserverContext<RegionCoprocessorEnvironment> e,
  56       final Increment increment, final Result result) throws IOException {
  57     if (ct.incrementAndGet() == 1) {
  58       Threads.sleep(sleepTime.get());
  59     }
  60     return result;
  61   }
  62
  63   @Override
  64   public Result postAppend(final ObserverContext<RegionCoprocessorEnvironment> e,
  65       final Append append, final Result result) throws IOException {
  66     if (ct.incrementAndGet() == 1) {
  67       Threads.sleep(sleepTime.get());
  68     }
  69     return result;
  70   }
  71 }