1 /**
2 *
3 * Licensed to the Apache Software Foundation (ASF) under one
4 * or more contributor license agreements. See the NOTICE file
5 * distributed with this work for additional information
6 * regarding copyright ownership. The ASF licenses this file
7 * to you under the Apache License, Version 2.0 (the
8 * "License"); you may not use this file except in compliance
9 * with the License. You may obtain a copy of the License at
10 *
11 * http://www.apache.org/licenses/LICENSE-2.0
12 *
13 * Unless required by applicable law or agreed to in writing, software
14 * distributed under the License is distributed on an "AS IS" BASIS,
15 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
16 * See the License for the specific language governing permissions and
17 * limitations under the License.
18 */
19 package org.apache.hadoop.hbase.regionserver.wal;
20
21 import java.io.IOException;
22
23 import org.apache.hadoop.hbase.util.Bytes;
24 import org.apache.hadoop.hbase.wal.WAL.Entry;
25
26 public class InstrumentedLogWriter extends ProtobufLogWriter {
27
28 public InstrumentedLogWriter() {
29 super();
30 }
31
32 public static boolean activateFailure = false;
33 @Override
34 public void append(Entry entry) throws IOException {
35 super.append(entry);
36 if (activateFailure &&
37 Bytes.equals(entry.getKey().getEncodedRegionName(), "break".getBytes())) {
38 System.out.println(getClass().getName() + ": I will throw an exception now...");
39 throw(new IOException("This exception is instrumented and should only be thrown for testing"
40 ));
41 }
42 }
43 }