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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.client.HBaseAdmin;
27 import org.apache.hadoop.hbase.io.encoding.DataBlockEncoding;
28 import org.apache.hadoop.hbase.util.Bytes;
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33 public class ChangeEncodingAction extends Action {
34 private final byte[] tableName;
35
36 private HBaseAdmin admin;
37 private Random random;
38
39 public ChangeEncodingAction(String tableName) {
40 this.tableName = Bytes.toBytes(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.getHaseIntegrationTestingUtility().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
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60 int[] possibleIds = {0, 2, 3, 4, 6};
61 for (HColumnDescriptor descriptor : columnDescriptors) {
62 short id = (short) possibleIds[random.nextInt(possibleIds.length)];
63 descriptor.setDataBlockEncoding(DataBlockEncoding.getEncodingById(id));
64 }
65
66 admin.modifyTable(tableName, tableDescriptor);
67 }
68 }