//
// 先写入数据，然后再Flush Transport
//
func (p *TBufferedFramedTransport) FlushBuffer(force bool) error {
size := p.Buffer.Len()
// 1. 将p.buf的大小以BigEndian模式写入: buf中
buf := p.LenghW[:4]
binary.BigEndian.PutUint32(buf, uint32(size))
// log.Printf("----> Frame Size: %d, %v\n", size, buf)
// 然后transport中先写入: 长度信息
_, err := p.Writer.Write(buf)
if err != nil {
return thrift.NewTTransportExceptionFromError(err)
}
// 2. 然后继续写入p.buf中的数据
if size > 0 {
var n int64
if n, err = p.Buffer.WriteTo(p.Writer); err != nil {
log.ErrorErrorf(err, "Error Flushing Expect Write: %d, but %d\n",
size, n)
return thrift.NewTTransportExceptionFromError(err)
}
}
p.nbuffered++
// Buffer重新开始处理数据
p.Buffer.Reset()
// Flush Buffer
return p.FlushTransport(force)
}
func (p *TBufferedFramedTransport) Read(buf []byte) (l int, err error) {
// 1. 首先读取Frame Header
if p.FrameSize == 0 {
p.FrameSize, err = p.readFrameHeader()
if err != nil {
return
}
}
// 2. 异常处理
if p.FrameSize < len(buf) {
frameSize := p.FrameSize
tmp := make([]byte, p.FrameSize)
l, err = p.Read(tmp)
copy(buf, tmp)
if err == nil {
err = thrift.NewTTransportExceptionFromError(
fmt.Errorf("Not enough frame size %d to read %d bytes",
frameSize, len(buf)))
return
}
}
// 3. 读取剩下的数据
got, err := p.Reader.Read(buf)
p.FrameSize = p.FrameSize - got
//sanity check
if p.FrameSize < 0 {
return 0, thrift.NewTTransportException(thrift.UNKNOWN_TRANSPORT_EXCEPTION,
"Negative frame size")
}
return got, thrift.NewTTransportExceptionFromError(err)
}
// 读取Frame的完整的数据，包含
func (p *TBufferedFramedTransport) ReadFrame() (frame []byte, err error) {
if p.FrameSize != 0 {
err = thrift.NewTTransportExceptionFromError(
fmt.Errorf("Unexpected frame size: %d", p.FrameSize))
return nil, err
}
var frameSize int
// Reader来自transport, 中间被封装了多长
frameSize, err = p.readFrameHeader()
if err != nil {
err1, ok := err.(thrift.TTransportException)
if ok {
err = thrift.NewTTransportException(err1.TypeId(),
fmt.Sprintf("Frame Header Read Error: %s", err1.Error()))
} else {
err = thrift.NewTTransportExceptionFromError(
fmt.Errorf("Frame Header Read Error: %s", err.Error()))
}
return
}
bytes := getSlice(frameSize, frameSize)
// 什么时候会出现?
// 1. 如果tcp package比较大，则容易出现package的一部分先到，另一部分随后再到
// 2. 在同一个机器上的两个进程之间出现的概率低(Time Delay小); 跨机器访问，出现概率高
var l int
l, err = io.ReadFull(p.Reader, bytes)
// l, err = p.Reader.Read(bytes)
if l != frameSize {
log.Warnf(Red("<==== ReadFrame frame size: %d, Got: %d"), frameSize, l)
}
if err != nil {
err1, ok := err.(thrift.TTransportException)
if ok {
err = thrift.NewTTransportException(err1.TypeId(),
fmt.Sprintf("Frame Data Read Error: %s", err1.Error()))
} else {
err = thrift.NewTTransportExceptionFromError(
fmt.Errorf("Frame Data Read Error: %s", err.Error()))
}
return nil, err
}
return bytes, nil
}
func Benchmark_CallEchoService(b *testing.B) {
socket, err := thrift.NewTSocketTimeout(net.JoinHostPort("127.0.0.1", "8080"), TIMEOUT)
if err != nil {
t.Fatal("Unable to new client socket", err)
}
transport := thrift.NewTFramedTransport(socket)
var protocol thrift.TProtocol = thrift.NewTBinaryProtocolTransport(transport)
protocol = thrift.NewTMultiplexedProtocol(protocol, "EchoService")
client := rpc.NewEchoServiceClientProtocol(transport, protocol, protocol)
err = transport.Open()
if err != nil {
t.Fatal("Unable to open client socket", err)
}
defer transport.Close()
for i := 0; i < b.N; i++ { //use b.N for looping
_, err2 := client.Echo(currentTimeMillis(), "hello world")
if err2 != nil {
exception := thrift.NewTTransportExceptionFromError(err2)
t.Fatal("test TestCallEchoService failed", exception.TypeId(), exception.Err())
}
}
}
func (t *natsTransport) Open() error {
t.closed = make(chan struct{})
t.writeBuffer = bytes.NewBuffer(make([]byte, 0, maxMessageSize))
reader, writer := io.Pipe()
timeoutReader := newTimeoutReader(reader)
timeoutReader.SetTimeout(t.readTimeout)
t.reader = timeoutReader
t.writer = writer
sub, err := t.conn.Subscribe(t.listenTo, func(msg *nats.Msg) {
if msg.Reply == disconnect {
// Remote client is disconnecting.
t.writer.Close()
return
}
t.writer.Write(msg.Data)
})
if err != nil {
return thrift.NewTTransportExceptionFromError(err)
}
t.conn.Flush() // Ensure subscription is processed before moving on.
t.sub = sub
if t.heartbeatInterval > 0 {
go t.startHeartbeat()
}
return nil
}
func (p *TUnixDomain) Read(buf []byte) (int, error) {
if !p.IsOpen() {
return 0, thrift.NewTTransportException(thrift.NOT_OPEN, "Connection not open")
}
p.pushDeadline(true, false)
n, err := p.conn.Read(buf)
return n, thrift.NewTTransportExceptionFromError(err)
}
func (t *natsTransport) Flush() error {
data := t.writeBuffer.Bytes()
if len(data) == 0 {
return nil
}
err := t.conn.Publish(t.replyTo, data)
t.writeBuffer.Reset()
return thrift.NewTTransportExceptionFromError(err)
}
func (t *natsTransport) Write(p []byte) (int, error) {
remaining := maxMessageSize - t.writeBuffer.Len()
if remaining < len(p) {
t.writeBuffer.Write(p[0:remaining])
if err := t.Flush(); err != nil {
return 0, thrift.NewTTransportExceptionFromError(err)
}
return t.Write(p[remaining:])
}
return t.writeBuffer.Write(p)
}
func (this *TUnixSocket) Accept() (thrift.TTransport, error) {
if this.interrupted {
return nil, errors.New("Transport Interrupted")
}
if this.listener == nil {
return nil, thrift.NewTTransportException(thrift.NOT_OPEN,
"No underlying server socket")
}
conn, err := this.listener.Accept()
if err != nil {
return nil, thrift.NewTTransportExceptionFromError(err)
}
return thrift.NewTSocketFromConnTimeout(conn, this.clientTimeout), nil
}
func (p *TServerUnixDomain) Accept() (thrift.TTransport, error) {
p.mu.RLock()
interrupted := p.interrupted
p.mu.RUnlock()
if interrupted {
return nil, errors.New("Transport Interrupted")
}
if p.listener == nil {
return nil, thrift.NewTTransportException(thrift.NOT_OPEN, "No underlying server socket")
}
conn, err := p.listener.Accept()
if err != nil {
return nil, thrift.NewTTransportExceptionFromError(err)
}
return thrift.NewTSocketFromConnTimeout(conn, p.clientTimeout), nil
}
func (p *TBufferedFramedTransport) ReadByte() (c byte, err error) {
if p.FrameSize == 0 {
p.FrameSize, err = p.readFrameHeader()
if err != nil {
return
}
}
if p.FrameSize < 1 {
return 0, thrift.NewTTransportExceptionFromError(
fmt.Errorf("Not enough frame size %d to read %d bytes", p.FrameSize, 1))
}
c, err = p.Reader.ReadByte()
if err == nil {
p.FrameSize--
}
return
}
func (t *natsTransport) Open() error {
sub, err := t.conn.Subscribe(t.listenTo, func(msg *nats.Msg) {
if msg.Reply == disconnect {
// Remote client is disconnecting.
t.writer.Close()
return
}
t.writer.Write(msg.Data)
})
if err != nil {
return thrift.NewTTransportExceptionFromError(err)
}
t.conn.Flush() // Ensure subscription is processed before moving on.
t.sub = sub
if t.heartbeatInterval > 0 {
go t.startHeartbeat()
}
return nil
}
func (t *natsTransport) Read(p []byte) (int, error) {
n, err := t.reader.Read(p)
return n, thrift.NewTTransportExceptionFromError(err)
}
"time"
"git.apache.org/thrift.git/lib/go/thrift"
)
type timeout struct{}
func (t timeout) Error() string {
return "timeout"
}
func (t timeout) Timeout() bool {
return true
}
var errTimeout = thrift.NewTTransportExceptionFromError(timeout{})
type timeoutReader struct {
buff *bufio.Reader
timeout time.Duration
ch <-chan error
}
func newTimeoutReader(r io.Reader) *timeoutReader {
return &timeoutReader{buff: bufio.NewReader(r), timeout: -1}
}
func (r *timeoutReader) SetTimeout(t time.Duration) time.Duration {
prev := r.timeout
r.timeout = t
return prev
func (p *TBufferedFramedTransport) Write(buf []byte) (int, error) {
// 直接写入Buffer
n, err := p.Buffer.Write(buf)
return n, thrift.NewTTransportExceptionFromError(err)
}