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.policies;
20
21 import org.apache.commons.logging.Log;
22 import org.apache.commons.logging.LogFactory;
23 import org.apache.hadoop.hbase.IntegrationTestingUtility;
24 import org.apache.hadoop.hbase.chaos.actions.Action;
25 import org.apache.hadoop.hbase.util.StoppableImplementation;
26
27 /**
28 * A policy to introduce chaos to the cluster
29 */
30 public abstract class Policy extends StoppableImplementation implements Runnable {
31
32 protected static final Log LOG = LogFactory.getLog(Policy.class);
33
34 protected PolicyContext context;
35
36 public void init(PolicyContext context) throws Exception {
37 this.context = context;
38
39 // Used to wire up stopping.
40 context.setPolicy(this);
41 }
42
43 /**
44 * A context for a Policy
45 */
46 public static class PolicyContext extends Action.ActionContext {
47
48 Policy policy = null;
49
50 public PolicyContext(IntegrationTestingUtility util) {
51 super(util);
52 }
53
54 @Override
55 public boolean isStopping() {
56 return policy.isStopped();
57 }
58
59 public void setPolicy(Policy policy) {
60 this.policy = policy;
61 }
62 }
63 }