Java ChannelBufferInputStream.readByte方法代码示例

import org.jboss.netty.buffer.ChannelBufferInputStream; //导入方法依赖的package包/类
@Override
protected Object decode(ChannelHandlerContext ctx,
    Channel channel, Object msg) throws Exception {
  if (!(msg instanceof ChannelBuffer)) {
    throw new IllegalStateException("decode: Got illegal message " + msg);
  }

  // Output metrics every 1/2 minute
  String metrics = byteCounter.getMetricsWindow(30000);
  if (metrics != null) {
    if (LOG.isInfoEnabled()) {
      LOG.info("decode: Server window metrics " + metrics);
    }
  }

  if (LOG.isDebugEnabled()) {
    startDecodingNanoseconds = TIME.getNanoseconds();
  }

  // Decode the request
  ChannelBuffer buffer = (ChannelBuffer) msg;
  ChannelBufferInputStream inputStream = new ChannelBufferInputStream(buffer);
  int enumValue = inputStream.readByte();
  RequestType type = RequestType.values()[enumValue];
  Class<? extends WritableRequest> writableRequestClass =
      type.getRequestClass();

  WritableRequest writableRequest =
      ReflectionUtils.newInstance(writableRequestClass, conf);
  writableRequest.readFields(inputStream);
  if (LOG.isDebugEnabled()) {
    LOG.debug("decode: Client " + writableRequest.getClientId() +
        ", requestId " + writableRequest.getRequestId() +
        ", " +  writableRequest.getType() + ", with size " +
        buffer.array().length + " took " +
        Times.getNanosSince(TIME, startDecodingNanoseconds) + " ns");
  }

  return writableRequest;
}
 

import org.jboss.netty.buffer.ChannelBufferInputStream; //导入方法依赖的package包/类
@Override
protected Object decode(ChannelHandlerContext ctx,
                        Channel channel, Object msg) throws Exception {
  if (!(msg instanceof ChannelBuffer)) {
    throw new IllegalStateException("decode: Got illegal message " + msg);
  }
  // Decode msg into an object whose class C implements WritableRequest:
  //  C will be either SaslTokenMessage or SaslComplete.
  //
  // 1. Convert message to a stream that can be decoded.
  ChannelBuffer buffer = (ChannelBuffer) msg;
  ChannelBufferInputStream inputStream = new ChannelBufferInputStream(buffer);
  // 2. Get first byte: message type:
  int enumValue = inputStream.readByte();
  RequestType type = RequestType.values()[enumValue];
  if (LOG.isDebugEnabled()) {
    LOG.debug("decode: Got a response of type " + type + " from server:" +
      channel.getRemoteAddress());
  }
  // 3. Create object of the type determined in step 2.
  Class<? extends WritableRequest> writableRequestClass =
    type.getRequestClass();
  WritableRequest serverResponse =
    ReflectionUtils.newInstance(writableRequestClass, conf);
  // 4. Deserialize the inputStream's contents into the newly-constructed
  // serverResponse object.
  try {
    serverResponse.readFields(inputStream);
  } catch (IOException e) {
    LOG.error("decode: Exception when trying to read server response: " + e);
  }
  // serverResponse can now be used in the next stage in pipeline.
  return serverResponse;
}
 

import org.jboss.netty.buffer.ChannelBufferInputStream; //导入方法依赖的package包/类
@Override
public void messageReceived(
    ChannelHandlerContext ctx, MessageEvent event) {
  if (!(event.getMessage() instanceof ChannelBuffer)) {
    throw new IllegalStateException("messageReceived: Got a " +
        "non-ChannelBuffer message " + event.getMessage());
  }

  ChannelBuffer buffer = (ChannelBuffer) event.getMessage();
  ChannelBufferInputStream inputStream = new ChannelBufferInputStream(buffer);
  int senderId = -1;
  long requestId = -1;
  int response = -1;
  try {
    senderId = inputStream.readInt();
    requestId = inputStream.readLong();
    response = inputStream.readByte();
    inputStream.close();
  } catch (IOException e) {
    throw new IllegalStateException(
        "messageReceived: Got IOException ", e);
  }

  // Simulate a failed response on the first response (if desired)
  if (dropFirstResponse && !ALREADY_DROPPED_FIRST_RESPONSE) {
    LOG.info("messageReceived: Simulating dropped response " + response +
        " for request " + requestId);
    setAlreadyDroppedFirstResponse();
    synchronized (workerIdOutstandingRequestMap) {
      workerIdOutstandingRequestMap.notifyAll();
    }
    return;
  }

  if (response == 1) {
    LOG.info("messageReceived: Already completed request " + requestId);
  } else if (response != 0) {
    throw new IllegalStateException(
        "messageReceived: Got illegal response " + response);
  }

  RequestInfo requestInfo = workerIdOutstandingRequestMap.remove(
      new ClientRequestId(senderId, requestId));
  if (requestInfo == null) {
    LOG.info("messageReceived: Already received response for request id = " +
        requestId);
  } else {
    if (LOG.isDebugEnabled()) {
      LOG.debug("messageReceived: Completed " + requestInfo +
          ".  Waiting on " + workerIdOutstandingRequestMap.size() +
          " requests");
    }
  }

  // Help NettyClient#waitSomeRequests() to finish faster
  synchronized (workerIdOutstandingRequestMap) {
    workerIdOutstandingRequestMap.notifyAll();
  }
}
 

import org.jboss.netty.buffer.ChannelBufferInputStream; //导入方法依赖的package包/类
@Override
public void messageReceived(
    ChannelHandlerContext ctx, MessageEvent event) {
  if (!(event.getMessage() instanceof ChannelBuffer)) {
    throw new IllegalStateException("messageReceived: Got a " +
        "non-ChannelBuffer message " + event.getMessage());
  }

  ChannelBuffer buffer = (ChannelBuffer) event.getMessage();
  ChannelBufferInputStream inputStream = new ChannelBufferInputStream(buffer);
  int senderId = -1;
  long requestId = -1;
  int response = -1;
  try {
    senderId = inputStream.readInt();
    requestId = inputStream.readLong();
    response = inputStream.readByte();
    inputStream.close();
  } catch (IOException e) {
    throw new IllegalStateException(
        "messageReceived: Got IOException ", e);
  }

  // Simulate a failed response on the first response (if desired)
  if (dropFirstResponse && !ALREADY_DROPPED_FIRST_RESPONSE) {
    LOG.info("messageReceived: Simulating dropped response " + response +
        " for request " + requestId);
    ALREADY_DROPPED_FIRST_RESPONSE = true;
    synchronized (workerIdOutstandingRequestMap) {
      workerIdOutstandingRequestMap.notifyAll();
    }
    return;
  }

  if (response == 1) {
    LOG.info("messageReceived: Already completed request " + requestId);
  } else if (response != 0) {
    throw new IllegalStateException(
        "messageReceived: Got illegal response " + response);
  }

  RequestInfo requestInfo = workerIdOutstandingRequestMap.remove(
      new ClientRequestId(senderId, requestId));
  if (requestInfo == null) {
    LOG.info("messageReceived: Already received response for request id = " +
        requestId);
  } else {
    if (LOG.isDebugEnabled()) {
      LOG.debug("messageReceived: Completed " + requestInfo +
          ".  Waiting on " + workerIdOutstandingRequestMap.size() +
          " requests");
    }
  }

  // Help NettyClient#waitSomeRequests() to finish faster
  synchronized (workerIdOutstandingRequestMap) {
    workerIdOutstandingRequestMap.notifyAll();
  }
}