/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.apache.hadoop.hbase.regionserver.wal;

import java.io.IOException;
import org.apache.hadoop.hbase.util.Bytes;
import org.apache.hadoop.hbase.wal.WAL.Entry;

public class InstrumentedLogWriter extends ProtobufLogWriter {

  public InstrumentedLogWriter() {
    super();
  }

  @Override
  protected String getWriterClassName() {
    return ProtobufLogWriter.class.getSimpleName();
  }

  public static boolean activateFailure = false;

  @Override
  public void append(Entry entry) throws IOException {
    super.append(entry);
    if (
      activateFailure && Bytes.equals(entry.getKey().getEncodedRegionName(), Bytes.toBytes("break"))
    ) {
      System.out.println(getClass().getName() + ": I will throw an exception now...");
      throw (new IOException(
        "This exception is instrumented and should only be thrown for testing"));
    }
  }
}
