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server.go
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server.go
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// Copyright 2018 The Chubao Authors.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
// implied. See the License for the specific language governing
// permissions and limitations under the License.
package metanode
import (
"io"
"net"
"github.com/chubaofs/chubaofs/proto"
"github.com/chubaofs/chubaofs/util/log"
)
// StartTcpService binds and listens to the specified port.
func (m *MetaNode) startServer() (err error) {
// initialize and start the server.
m.httpStopC = make(chan uint8)
ln, err := net.Listen("tcp", ":"+m.listen)
if err != nil {
return
}
go func(stopC chan uint8) {
defer ln.Close()
for {
conn, err := ln.Accept()
select {
case <-stopC:
return
default:
}
if err != nil {
continue
}
go m.serveConn(conn, stopC)
}
}(m.httpStopC)
log.LogInfof("start server over...")
return
}
func (m *MetaNode) stopServer() {
if m.httpStopC != nil {
defer func() {
if r := recover(); r != nil {
log.LogErrorf("action[StopTcpServer],err:%v", r)
}
}()
close(m.httpStopC)
}
}
// Read data from the specified tcp connection until the connection is closed by the remote or the tcp service is down.
func (m *MetaNode) serveConn(conn net.Conn, stopC chan uint8) {
defer conn.Close()
c := conn.(*net.TCPConn)
c.SetKeepAlive(true)
c.SetNoDelay(true)
remoteAddr := conn.RemoteAddr().String()
for {
select {
case <-stopC:
return
default:
}
p := &Packet{}
if err := p.ReadFromConn(conn, proto.NoReadDeadlineTime); err != nil {
if err != io.EOF {
log.LogError("serve MetaNode: ", err.Error())
}
return
}
if err := m.handlePacket(conn, p, remoteAddr); err != nil {
log.LogErrorf("serve handlePacket fail: %v", err)
}
}
}
func (m *MetaNode) handlePacket(conn net.Conn, p *Packet,
remoteAddr string) (err error) {
// Handle request
err = m.metadataManager.HandleMetadataOperation(conn, p, remoteAddr)
return
}