예제 #1
0
// peekMessage() reads a message from the buffer, but the bytes are NOT committed.
// This means the buffer still thinks the bytes are not read yet.
func (this *service) peekMessage(mtype message.MessageType, total int) (message.Message, int, error) {
	var (
		b    []byte
		err  error
		i, n int
		msg  message.Message
	)

	if this.in == nil {
		return nil, 0, ErrBufferNotReady
	}

	// Peek until we get total bytes
	for i = 0; ; i++ {
		// Peek remlen bytes from the input buffer.
		b, err = this.in.ReadWait(total)
		if err != nil && err != ErrBufferInsufficientData {
			return nil, 0, err
		}

		// If not enough bytes are returned, then continue until there's enough.
		if len(b) >= total {
			break
		}
	}

	msg, err = mtype.New()
	if err != nil {
		return nil, 0, err
	}

	n, err = msg.Decode(b)
	return msg, n, err
}
예제 #2
0
// readMessage() reads and copies a message from the buffer. The buffer bytes are
// committed as a result of the read.
func (this *service) readMessage(mtype message.MessageType, total int) (message.Message, int, error) {
	var (
		b   []byte
		err error
		n   int
		msg message.Message
	)

	if this.in == nil {
		err = ErrBufferNotReady
		return nil, 0, err
	}

	if len(this.intmp) < total {
		this.intmp = make([]byte, total)
	}

	// Read until we get total bytes
	l := 0
	for l < total {
		n, err = this.in.Read(this.intmp[l:])
		l += n
		glog.Debugf("read %d bytes, total %d", n, l)
		if err != nil {
			return nil, 0, err
		}
	}

	b = this.intmp[:total]

	msg, err = mtype.New()
	if err != nil {
		return msg, 0, err
	}

	n, err = msg.Decode(b)
	return msg, n, err
}