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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 private final String tableNameString;
36
37 private HBaseAdmin admin;
38 private Random random;
39
40 public ChangeEncodingAction(String tableName) {
41 tableNameString = tableName;
42 this.tableName = Bytes.toBytes(tableName);
43 this.random = new Random();
44 }
45
46 @Override
47 public void init(ActionContext context) throws IOException {
48 super.init(context);
49 this.admin = context.getHBaseIntegrationTestingUtility().getHBaseAdmin();
50 }
51
52 @Override
53 public void perform() throws Exception {
54 HTableDescriptor tableDescriptor = admin.getTableDescriptor(tableName);
55 HColumnDescriptor[] columnDescriptors = tableDescriptor.getColumnFamilies();
56
57 if (columnDescriptors == null || columnDescriptors.length == 0) {
58 return;
59 }
60
61 LOG.debug("Performing action: Changing encodings on " + tableNameString);
62
63 int[] possibleIds = {0, 2, 3, 4, 6};
64 for (HColumnDescriptor descriptor : columnDescriptors) {
65 short id = (short) possibleIds[random.nextInt(possibleIds.length)];
66 descriptor.setDataBlockEncoding(DataBlockEncoding.getEncodingById(id));
67 LOG.debug("Set encoding of column family " + descriptor.getNameAsString()
68 + " to: " + descriptor.getDataBlockEncoding());
69 }
70
71 admin.modifyTable(tableName, tableDescriptor);
72 }
73 }