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 }