1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19 package org.apache.hadoop.hbase.chaos.actions;
20
21 import java.io.IOException;
22 import java.util.Random;
23
24 import org.apache.hadoop.hbase.HColumnDescriptor;
25 import org.apache.hadoop.hbase.HTableDescriptor;
26 import org.apache.hadoop.hbase.TableName;
27 import org.apache.hadoop.hbase.client.Admin;
28 import org.apache.hadoop.hbase.io.encoding.DataBlockEncoding;
29
30
31
32
33 public class ChangeEncodingAction extends Action {
34 private final TableName tableName;
35
36 private Admin admin;
37 private Random random;
38
39 public ChangeEncodingAction(TableName tableName) {
40 this.tableName = tableName;
41 this.random = new Random();
42 }
43
44 @Override
45 public void init(ActionContext context) throws IOException {
46 super.init(context);
47 this.admin = context.getHBaseIntegrationTestingUtility().getHBaseAdmin();
48 }
49
50 @Override
51 public void perform() throws Exception {
52 HTableDescriptor tableDescriptor = admin.getTableDescriptor(tableName);
53 HColumnDescriptor[] columnDescriptors = tableDescriptor.getColumnFamilies();
54
55 if (columnDescriptors == null || columnDescriptors.length == 0) {
56 return;
57 }
58
59 LOG.debug("Performing action: Changing encodings on " + tableName);
60
61 int[] possibleIds = {0, 2, 3, 4, 6};
62 for (HColumnDescriptor descriptor : columnDescriptors) {
63 short id = (short) possibleIds[random.nextInt(possibleIds.length)];
64 descriptor.setDataBlockEncoding(DataBlockEncoding.getEncodingById(id));
65 LOG.debug("Set encoding of column family " + descriptor.getNameAsString()
66 + " to: " + descriptor.getDataBlockEncoding());
67 }
68
69 admin.modifyTable(tableName, tableDescriptor);
70 }
71 }