content: /*
   * 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.asterix.common.transactions;
  
  import java.io.IOException;
  import java.nio.ByteBuffer;
  import java.nio.channels.FileChannel;
  
  public class TxnLogFile {
  
      private final FileChannel fileChannel;
      private final long logFileId;
      private final long fileBeginLSN;
      private final ILogManager logManager;
      private boolean open = true;
  
      public TxnLogFile(ILogManager logManager, FileChannel fileChannel, long logFileId, long fileBeginLSN) {
          this.logManager = logManager;
          this.fileChannel = fileChannel;
          this.logFileId = logFileId;
          this.fileBeginLSN = fileBeginLSN;
      }
  
      public void position(long newPosition) throws IOException {
          fileChannel.position(newPosition);
      }
  
      public long size() throws IOException {
          return fileChannel.size();
      }
  
      public int read(ByteBuffer readBuffer) throws IOException {
          return fileChannel.read(readBuffer);
      }
  
      public long getLogFileId() {
          return logFileId;
      }
  
      public synchronized void close() throws IOException {
          if (open) {
              logManager.closeLogFile(this, fileChannel);
              open = false;
          }
      }
  
      public long getFileBeginLSN() {
          return fileBeginLSN;
      }
  }
  