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JPPF, the open source grid computing solution
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/*
 * JPPF.
 * Copyright (C) 2005-2015 JPPF Team.
 * http://www.jppf.org
 *
 * Licensed 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.jppf.io;

import java.io.IOException;
import java.nio.ByteBuffer;

import org.jppf.comm.socket.SocketWrapper;

/**
 * Output destination backed by a {@link org.jppf.comm.socket.SocketWrapper SocketWrapper}.
 * @author Laurent Cohen
 */
public class SocketWrapperOutputDestination implements OutputDestination {
  /**
   * The backing SocketWrapper.
   */
  private SocketWrapper socketWrapper = null;

  /**
   * Initialize this output destination with the specified SocketWrapper.
   * @param socketWrapper the backing SocketWrapper.
   */
  public SocketWrapperOutputDestination(final SocketWrapper socketWrapper) {
    this.socketWrapper = socketWrapper;
  }

  /**
   * Write data to this output destination from an array of bytes.
   * @param data the buffer containing the data to write.
   * @param offset the position in the buffer where to start reading the data.
   * @param len the size in bytes of the data to write.
   * @return the number of bytes actually written, or -1 if end of stream was reached.
   * @throws Exception if an IO error occurs.
   */
  @Override
  public int write(final byte[] data, final int offset, final int len) throws Exception {
    socketWrapper.write(data, offset, len);
    return len;
  }

  /**
   * Write data to this output destination from a byte buffer.
   * @param data the buffer containing the data to write.
   * @return the number of bytes actually written, or -1 if end of stream was reached.
   * @throws Exception if an IO error occurs.
   */
  @Override
  public int write(final ByteBuffer data) throws Exception {
    byte[] buf = IO.TEMP_BUFFER_POOL.get();
    try {
    int size = Math.min(buf.length, data.remaining());
    data.get(buf, 0, size);
    socketWrapper.write(buf, 0, size);
    return size;
    } finally {
      IO.TEMP_BUFFER_POOL.put(buf);
    }
  }

  /**
   * Write an int value to this output destination.
   * @param value the value to write.
   * @throws Exception if an IO error occurs.
   */
  @Override
  public void writeInt(final int value) throws Exception
  {
    socketWrapper.writeInt(value);
  }

  /**
   * This method does nothing.
   * @throws IOException if an IO error occurs.
   */
  @Override
  public void close() throws IOException {
  }
}