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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    private boolean killMetaRs;
35  
36    @Override
37    public ChaosMonkey build() {
38      loadProperties();
39      Policy chaosPolicy = new PeriodicRandomActionPolicy(chaosEveryMilliSec,
40          new UnbalanceKillAndRebalanceAction(waitForUnbalanceMilliSec, waitForKillMilliSec,
41              waitAfterBalanceMilliSec, killMetaRs));
42  
43      return new PolicyBasedChaosMonkey(util, chaosPolicy);
44    }
45  
46    private void loadProperties() {
47      chaosEveryMilliSec = Long.parseLong(this.properties.getProperty(
48        MonkeyConstants.UNBALANCE_CHAOS_EVERY_MS,
49        MonkeyConstants.DEFAULT_UNBALANCE_CHAOS_EVERY_MS + ""));
50      waitForUnbalanceMilliSec = Long.parseLong(this.properties.getProperty(
51        MonkeyConstants.UNBALANCE_WAIT_FOR_UNBALANCE_MS,
52        MonkeyConstants.DEFAULT_UNBALANCE_WAIT_FOR_UNBALANCE_MS + ""));
53      waitForKillMilliSec = Long.parseLong(this.properties.getProperty(
54        MonkeyConstants.UNBALANCE_WAIT_FOR_KILLS_MS,
55        MonkeyConstants.DEFAULT_UNBALANCE_WAIT_FOR_KILLS_MS + ""));
56      waitAfterBalanceMilliSec = Long.parseLong(this.properties.getProperty(
57        MonkeyConstants.UNBALANCE_WAIT_AFTER_BALANCE_MS,
58        MonkeyConstants.DEFAULT_UNBALANCE_WAIT_AFTER_BALANCE_MS + ""));
59      killMetaRs = Boolean.parseBoolean(this.properties.getProperty(
60        MonkeyConstants.UNBALANCE_KILL_META_RS,
61        MonkeyConstants.DEFAULT_UNBALANCE_KILL_META_RS + ""));
62    }
63  }