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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.commons.lang.RandomStringUtils;
25 import org.apache.hadoop.hbase.HColumnDescriptor;
26 import org.apache.hadoop.hbase.HTableDescriptor;
27 import org.apache.hadoop.hbase.client.HBaseAdmin;
28 import org.apache.hadoop.hbase.util.Bytes;
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33 public class AddColumnAction extends Action {
34 private final Random random;
35 private final byte[] tableName;
36 private HBaseAdmin admin;
37
38 public AddColumnAction(String tableName) {
39 this.tableName = Bytes.toBytes(tableName);
40 this.random = new Random();
41 }
42
43 @Override
44 public void init(ActionContext context) throws IOException {
45 super.init(context);
46 this.admin = context.getHaseIntegrationTestingUtility().getHBaseAdmin();
47 }
48
49 @Override
50 public void perform() throws Exception {
51 HTableDescriptor tableDescriptor = admin.getTableDescriptor(tableName);
52 HColumnDescriptor columnDescriptor = null;
53
54 while(columnDescriptor == null ||
55 tableDescriptor.getFamily(columnDescriptor.getName()) != null) {
56 columnDescriptor = new HColumnDescriptor(RandomStringUtils.randomAlphabetic(5));
57 }
58
59 tableDescriptor.addFamily(columnDescriptor);
60 admin.modifyTable(tableName, tableDescriptor);
61 }
62 }