NonSyncDataOutputStream.java

/**
 * 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.tez.common.io;

import java.io.DataOutputStream;
import java.io.IOException;
import java.io.OutputStream;

/**
 * A thread-not-safe version of DataOutputStream, which removes all
 * synchronized modifiers.
 */
public class NonSyncDataOutputStream extends DataOutputStream {
  public NonSyncDataOutputStream(OutputStream stream) {
    super(stream);
  }

  private void incrementWritten(int len) {
    written += len;
    if (written < 0) {
      written = Integer.MAX_VALUE;
    }
  }

  /**
   * {@inheritDoc}
   */
  @Override
  public void write(int b) throws IOException {
    out.write(b);
    incrementWritten(1);
  }

  /**
   * {@inheritDoc}
   */
  @Override
  public void write(byte b[], int off, int len) throws IOException {
    out.write(b, off, len);
    incrementWritten(len);
  }
}