1 /**
2 * Copyright 2010 The Apache Software Foundation
3 *
4 * Licensed to the Apache Software Foundation (ASF) under one
5 * or more contributor license agreements. See the NOTICE file
6 * distributed with this work for additional information
7 * regarding copyright ownership. The ASF licenses this file
8 * to you under the Apache License, Version 2.0 (the
9 * "License"); you may not use this file except in compliance
10 * with the License. You may obtain a copy of the License at
11 *
12 * http://www.apache.org/licenses/LICENSE-2.0
13 *
14 * Unless required by applicable law or agreed to in writing, software
15 * distributed under the License is distributed on an "AS IS" BASIS,
16 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
17 * See the License for the specific language governing permissions and
18 * limitations under the License.
19 */
20 package org.apache.hadoop.hbase.regionserver.wal;
21
22 import java.io.IOException;
23
24 import org.apache.hadoop.hbase.util.Bytes;
25
26 public class InstrumentedSequenceFileLogWriter extends SequenceFileLogWriter {
27
28 public InstrumentedSequenceFileLogWriter() {
29 super(HLogKey.class);
30 }
31
32 public static boolean activateFailure = false;
33 @Override
34 public void append(HLog.Entry entry) throws IOException {
35 super.append(entry);
36 if (activateFailure && Bytes.equals(entry.getKey().getEncodedRegionName(), "break".getBytes())) {
37 System.out.println(getClass().getName() + ": I will throw an exception now...");
38 throw(new IOException("This exception is instrumented and should only be thrown for testing"));
39 }
40 }
41 }