View Javadoc

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  
19  package org.apache.hadoop.hbase.chaos.factories;
20  
21  import org.apache.hadoop.hbase.chaos.actions.UnbalanceKillAndRebalanceAction;
22  import org.apache.hadoop.hbase.chaos.monkies.ChaosMonkey;
23  import org.apache.hadoop.hbase.chaos.monkies.PolicyBasedChaosMonkey;
24  import org.apache.hadoop.hbase.chaos.policies.PeriodicRandomActionPolicy;
25  import org.apache.hadoop.hbase.chaos.policies.Policy;
26  
27  public class UnbalanceMonkeyFactory extends MonkeyFactory {
28    /** How often to introduce the chaos. If too frequent, sequence of kills on minicluster
29     * can cause test to fail when Put runs out of retries. */
30    private long chaosEveryMilliSec;
31    private long waitForUnbalanceMilliSec;
32    private long waitForKillMilliSec;
33    private long waitAfterBalanceMilliSec;
34  
35    @Override
36    public ChaosMonkey build() {
37      loadProperties();
38      Policy chaosPolicy = new PeriodicRandomActionPolicy(chaosEveryMilliSec,
39          new UnbalanceKillAndRebalanceAction(waitForUnbalanceMilliSec, waitForKillMilliSec,
40              waitAfterBalanceMilliSec));
41  
42      return new PolicyBasedChaosMonkey(util, chaosPolicy);
43    }
44  
45    private void loadProperties() {
46      chaosEveryMilliSec = Long.parseLong(this.properties.getProperty(
47        MonkeyConstants.UNBALANCE_CHAOS_EVERY_MS,
48        MonkeyConstants.DEFAULT_UNBALANCE_CHAOS_EVERY_MS + ""));
49      waitForUnbalanceMilliSec = Long.parseLong(this.properties.getProperty(
50        MonkeyConstants.UNBALANCE_WAIT_FOR_UNBALANCE_MS,
51        MonkeyConstants.DEFAULT_UNBALANCE_WAIT_FOR_UNBALANCE_MS + ""));
52      waitForKillMilliSec = Long.parseLong(this.properties.getProperty(
53        MonkeyConstants.UNBALANCE_WAIT_FOR_KILLS_MS,
54        MonkeyConstants.DEFAULT_UNBALANCE_WAIT_FOR_KILLS_MS + ""));
55      waitAfterBalanceMilliSec = Long.parseLong(this.properties.getProperty(
56        MonkeyConstants.UNBALANCE_WAIT_AFTER_BALANCE_MS,
57        MonkeyConstants.DEFAULT_UNBALANCE_WAIT_AFTER_BALANCE_MS + ""));
58    }
59  }