/
internal_tcp_server.go
124 lines (103 loc) · 2.95 KB
/
internal_tcp_server.go
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// Copyright (c) 2015 Uber Technologies, Inc.
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.
package benchmark
import (
"log"
"net"
"github.com/uber/tchannel-go"
"go.uber.org/atomic"
)
// internalTCPServer represents a TCP server responds to TChannel
// calls using raw TCP packets.
type internalTCPServer struct {
frames frames
ln net.Listener
opts *options
rawCalls atomic.Int64
}
func newInternalTCPServer(opts *options) Server {
ln, err := net.Listen("tcp", "127.0.0.1:0")
if err != nil {
panic(err)
}
s := &internalTCPServer{
ln: ln,
frames: getRawCallFrames(opts.timeout, opts.svcName, opts.reqSize),
opts: opts,
}
go s.acceptLoop()
return s
}
func (s *internalTCPServer) acceptLoop() {
for {
conn, err := s.ln.Accept()
if err, ok := err.(net.Error); ok && err.Temporary() {
continue
}
if err != nil {
return
}
go s.handleConn(conn)
}
}
func (s *internalTCPServer) handleConn(conn net.Conn) {
c := make(chan uint32, 1000)
defer close(c)
go s.writeResponses(conn, c)
var lastID uint32
f := tchannel.NewFrame(tchannel.MaxFrameSize)
for {
if err := f.ReadIn(conn); err != nil {
return
}
if f.Header.ID > lastID {
c <- f.Header.ID
lastID = f.Header.ID
}
}
}
func (s *internalTCPServer) writeResponses(conn net.Conn, ids chan uint32) {
frames := s.frames.duplicate()
for id := range ids {
if id == 1 {
if err := frames.writeInitRes(conn); err != nil {
log.Printf("writeInitRes failed: %v", err)
}
continue
}
s.rawCalls.Inc()
if _, err := frames.writeCallRes(id, conn); err != nil {
log.Printf("writeCallRes failed: %v", err)
return
}
}
}
func (s *internalTCPServer) HostPort() string {
return s.ln.Addr().String()
}
func (s *internalTCPServer) RawCalls() int {
return int(s.rawCalls.Load())
}
func (s *internalTCPServer) ThriftCalls() int {
// Server does not support Thrift calls currently.
return 0
}
func (s *internalTCPServer) Close() {
s.ln.Close()
}