content: /**
   * Copyright The Apache Software Foundation
   *
   * 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.bookkeeper.bookie;
  
  import java.nio.ByteBuffer;
  
  /**
   * Journal stream position.
   */
  public class LogMark {
      long logFileId;
      long logFileOffset;
  
      public static final LogMark MAX_VALUE = new LogMark(Long.MAX_VALUE, Long.MAX_VALUE);
  
      public LogMark() {
          setLogMark(0, 0);
      }
  
      public LogMark(LogMark other) {
          setLogMark(other.getLogFileId(), other.getLogFileOffset());
      }
  
      public LogMark(long logFileId, long logFileOffset) {
          setLogMark(logFileId, logFileOffset);
      }
  
      public synchronized long getLogFileId() {
          return logFileId;
      }
  
      public synchronized long getLogFileOffset() {
          return logFileOffset;
      }
  
      public synchronized void readLogMark(ByteBuffer bb) {
          logFileId = bb.getLong();
          logFileOffset = bb.getLong();
      }
  
      public synchronized void writeLogMark(ByteBuffer bb) {
          bb.putLong(logFileId);
          bb.putLong(logFileOffset);
      }
  
      public synchronized void setLogMark(long logFileId, long logFileOffset) {
          this.logFileId = logFileId;
          this.logFileOffset = logFileOffset;
      }
  
      public synchronized int compare(LogMark other) {
          long ret = this.logFileId - other.getLogFileId();
          if (ret == 0) {
              ret = this.logFileOffset - other.getLogFileOffset();
          }
          return (ret < 0) ? -1 : ((ret > 0) ? 1 : 0);
      }
  
      @Override
      public synchronized String toString() {
          StringBuilder sb = new StringBuilder();
  
          sb.append("LogMark: logFileId - ").append(logFileId)
                  .append(" , logFileOffset - ").append(logFileOffset);
  
          return sb.toString();
      }
  }
  