Java ChannelBufferOutputStream.flush方法代码示例

import org.jboss.netty.buffer.ChannelBufferOutputStream; //导入方法依赖的package包/类
private Object doEncode(Request request, ChannelHandlerContext ctx, Channel channel) throws Exception {
    //version from request header;
    byte ver = request.getHeader().getSerializeVersion();
    //overwrite if request header == 0 and version != 0, use version
    if ( ver == 0 && version != 0)
        ver = version;
    int pLen = request.getPayload() == null ? 0 : request.getPayload().length;
    byte[] header = request.getHeader().toByte();
    // encoding length , and check the max value of integer, should be 2GB
    int len = TOTAL + header.length + pLen + R_SIZE;
    if ( len > Integer.MAX_VALUE ) {
        channel.close();
        throw new Exception( len+" exceeding Integer.MAX_VALUE");
    }
    ChannelBufferOutputStream bout =   new ChannelBufferOutputStream(dynamicBuffer(
                len, ctx.getChannel().getConfig().getBufferFactory()));
    bout.write(SIGNATURE);
    bout.write(ver);
    bout.writeInt(len);
    bout.writeShort((short) header.length);
    bout.write(header);
    // request type
    bout.write((byte) request.getType().ordinal());
    bout.write( request.getPayload());
    bout.flush();
    bout.close();
    ChannelBuffer encoded = bout.buffer();
    return encoded;
}
 

import org.jboss.netty.buffer.ChannelBufferOutputStream; //导入方法依赖的package包/类
@Override
protected Object encode(ChannelHandlerContext ctx,
                        Channel channel, Object msg) throws Exception {
  if (!(msg instanceof WritableRequest)) {
    throw new IllegalArgumentException(
        "encode: Got a message of type " + msg.getClass());
  }

  // Encode the request
  if (LOG.isDebugEnabled()) {
    startEncodingNanoseconds = TIME.getNanoseconds();
  }
  WritableRequest writableRequest = (WritableRequest) msg;
  int requestSize = writableRequest.getSerializedSize();
  ChannelBuffer channelBuffer;
  if (requestSize == WritableRequest.UNKNOWN_SIZE) {
    channelBuffer = ChannelBuffers.dynamicBuffer(
        bufferStartingSize,
        ctx.getChannel().getConfig().getBufferFactory());
  } else {
    requestSize += LENGTH_PLACEHOLDER.length + 1;
    channelBuffer = useDirectBuffers ?
        ChannelBuffers.directBuffer(requestSize) :
        ChannelBuffers.buffer(requestSize);
  }
  ChannelBufferOutputStream outputStream =
      new ChannelBufferOutputStream(channelBuffer);
  outputStream.write(LENGTH_PLACEHOLDER);
  outputStream.writeByte(writableRequest.getType().ordinal());
  try {
    writableRequest.write(outputStream);
  } catch (IndexOutOfBoundsException e) {
    LOG.error("encode: Most likely the size of request was not properly " +
        "specified - see getSerializedSize() in " +
        writableRequest.getType().getRequestClass());
    throw new IllegalStateException(e);
  }
  outputStream.flush();
  outputStream.close();

  // Set the correct size at the end
  ChannelBuffer encodedBuffer = outputStream.buffer();
  encodedBuffer.setInt(0, encodedBuffer.writerIndex() - 4);
  if (LOG.isDebugEnabled()) {
    LOG.debug("encode: Client " + writableRequest.getClientId() + ", " +
        "requestId " + writableRequest.getRequestId() +
        ", size = " + encodedBuffer.writerIndex() + ", " +
        writableRequest.getType() + " took " +
        Times.getNanosSince(TIME, startEncodingNanoseconds) + " ns");
  }
  return encodedBuffer;
}
 

import org.jboss.netty.buffer.ChannelBufferOutputStream; //导入方法依赖的package包/类
@Override
  protected Object encode(ChannelHandlerContext ctx,
      Channel channel, Object msg) throws Exception {
    if (LOG.isDebugEnabled()) {
      LOG.debug("encode(" + ctx + "," + channel + "," + msg);
    }

    if (!(msg instanceof WritableRequest)) {
      throw new IllegalArgumentException(
          "encode: cannot encode message of type " + msg.getClass() +
              " since it is not an instance of an implementation of " +
              " WritableRequest.");
    }
    @SuppressWarnings("unchecked")
    WritableRequest writableRequest =
      (WritableRequest) msg;
    ChannelBufferOutputStream outputStream =
      new ChannelBufferOutputStream(ChannelBuffers.dynamicBuffer(
        10, ctx.getChannel().getConfig().getBufferFactory()));

    if (LOG.isDebugEnabled()) {
      LOG.debug("encode: Encoding a message of type " + msg.getClass());
    }
    outputStream.write(LENGTH_PLACEHOLDER);

    // write type of object.
    outputStream.writeByte(writableRequest.getType().ordinal());

    // write the object itself.
    writableRequest.write(outputStream);

    outputStream.flush();

    // Set the correct size at the end.
    ChannelBuffer encodedBuffer = outputStream.buffer();
    encodedBuffer.setInt(0, encodedBuffer.writerIndex() - 4);

    if (LOG.isDebugEnabled()) {
      LOG.debug("encode: Encoding a message of type " + msg.getClass());
    }
/*if[HADOOP_NON_SECURE]
else[HADOOP_NON_SECURE]*/
    if (writableRequest.getType() == RequestType.SASL_COMPLETE_REQUEST) {
      // We are sending to the client a SASL_COMPLETE response (created by
      // the SaslServer handler). The SaslServer handler has removed itself
      // from the pipeline after creating this response, and now it's time for
      // the ResponseEncoder to remove itself also.
      if (LOG.isDebugEnabled()) {
        LOG.debug("encode: Removing RequestEncoder handler: no longer needed," +
            " since client: " + ctx.getChannel().getRemoteAddress() + " has " +
            "completed authenticating.");
      }
      ctx.getPipeline().remove(this);
    }
/*end[HADOOP_NON_SECURE]*/
    return encodedBuffer;
  }
 

import org.jboss.netty.buffer.ChannelBufferOutputStream; //导入方法依赖的package包/类
@Override
protected Object encode(ChannelHandlerContext ctx,
    Channel channel, Object msg) throws Exception {
  if (LOG.isDebugEnabled()) {
    LOG.debug("encode(" + ctx + "," + channel + "," + msg);
  }

  if (!(msg instanceof WritableRequest)) {
    throw new IllegalArgumentException(
        "encode: cannot encode message of type " + msg.getClass() +
            " since it is not an instance of an implementation of " +
            " WritableRequest.");
  }
  @SuppressWarnings("unchecked")
  WritableRequest writableRequest =
    (WritableRequest) msg;
  ChannelBufferOutputStream outputStream =
    new ChannelBufferOutputStream(ChannelBuffers.dynamicBuffer(
      10, ctx.getChannel().getConfig().getBufferFactory()));

  if (LOG.isDebugEnabled()) {
    LOG.debug("encode: Encoding a message of type " + msg.getClass());
  }
  outputStream.write(LENGTH_PLACEHOLDER);

  // write type of object.
  outputStream.writeByte(writableRequest.getType().ordinal());

  // write the object itself.
  writableRequest.write(outputStream);

  outputStream.flush();

  // Set the correct size at the end.
  ChannelBuffer encodedBuffer = outputStream.buffer();
  encodedBuffer.setInt(0, encodedBuffer.writerIndex() - 4);

  if (LOG.isDebugEnabled()) {
    LOG.debug("encode: Encoding a message of type " + msg.getClass());
  }


  if (writableRequest.getType() == RequestType.SASL_COMPLETE_REQUEST) {
    // We are sending to the client a SASL_COMPLETE response (created by
    // the SaslServer handler). The SaslServer handler has removed itself
    // from the pipeline after creating this response, and now it's time for
    // the ResponseEncoder to remove itself also.
    if (LOG.isDebugEnabled()) {
      LOG.debug("encode: Removing RequestEncoder handler: no longer needed," +
          " since client: " + ctx.getChannel().getRemoteAddress() + " has " +
          "completed authenticating.");
    }
    ctx.getPipeline().remove(this);
  }

  return encodedBuffer;
}