/
event_log_server.go
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/
event_log_server.go
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// Copyright (C) 2014-2018 Goodrain Co., Ltd.
// RAINBOND, Application Management Platform
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version. For any non-GPL usage of Rainbond,
// one or multiple Commercial Licenses authorized by Goodrain Co., Ltd.
// must be obtained first.
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
// You should have received a copy of the GNU General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
package entry
import (
"errors"
"github.com/goodrain/rainbond/eventlog/conf"
grpcserver "github.com/goodrain/rainbond/eventlog/entry/grpc/server"
"github.com/goodrain/rainbond/eventlog/store"
"time"
"golang.org/x/net/context"
"fmt"
"sync"
"github.com/Sirupsen/logrus"
zmq4 "github.com/pebbe/zmq4"
)
//EventLogServer 日志接受服务
type EventLogServer struct {
conf conf.EventLogServerConf
log *logrus.Entry
cancel func()
context context.Context
server *zmq4.Socket
storemanager store.Manager
messageChan chan []byte
listenErr chan error
serverLock sync.Mutex
stopReceiveMessage bool
eventRPCServer *grpcserver.EventLogRPCServer
}
//NewEventLogServer 创建zmq server服务端
func NewEventLogServer(conf conf.EventLogServerConf, log *logrus.Entry, storeManager store.Manager) (*EventLogServer, error) {
ctx, cancel := context.WithCancel(context.Background())
s := &EventLogServer{
conf: conf,
log: log,
cancel: cancel,
context: ctx,
storemanager: storeManager,
listenErr: make(chan error),
}
server, err := zmq4.NewSocket(zmq4.REP)
if err != nil {
s.log.Error("create rep zmq socket error.", err.Error())
return nil, err
}
address := fmt.Sprintf("tcp://%s:%d", s.conf.BindIP, s.conf.BindPort)
server.Bind(address)
s.log.Infof("Message server listen %s", address)
s.server = server
s.messageChan = s.storemanager.ReceiveMessageChan()
if s.messageChan == nil {
return nil, errors.New("receive log message server can not get store message chan ")
}
//grpc服务
eventRPCServer := grpcserver.NewServer(conf, log, storeManager, s.listenErr)
s.eventRPCServer = eventRPCServer
return s, nil
}
//Serve 执行
func (s *EventLogServer) Serve() {
s.eventRPCServer.Start()
s.handleMessage()
}
//Stop 停止
func (s *EventLogServer) Stop() {
s.cancel()
s.eventRPCServer.Stop()
s.log.Info("receive event message server stop")
}
func (s *EventLogServer) handleMessage() {
chQuit := make(chan interface{})
chErr := make(chan error, 2)
channel := make(chan []byte, s.conf.CacheMessageSize)
newServerListen := func(sock *zmq4.Socket, channel chan []byte) {
socketHandler := func(state zmq4.State) error {
msgs, err := sock.RecvMessageBytes(0)
if err != nil {
s.log.Error("docker log server receive message error.", err.Error())
return err
}
_, err = sock.SendMessage("OK") //回复ok
if err != nil {
s.log.Error("server reback message error.", err.Error())
return err
}
for _, msg := range msgs {
channel <- msg
}
return nil
}
quitHandler := func(interface{}) error {
close(channel)
s.log.Infof("Docker container message receive Server quit.")
return nil
}
reactor := zmq4.NewReactor()
reactor.AddSocket(sock, zmq4.POLLIN, socketHandler)
reactor.AddChannel(chQuit, 1, quitHandler)
err := reactor.Run(100 * time.Millisecond)
chErr <- err
}
go newServerListen(s.server, channel)
func() {
for !s.stopReceiveMessage {
select {
case msg := <-channel:
s.messageChan <- msg
case <-s.context.Done():
s.log.Debug("handle message core begin close.")
close(chQuit)
s.stopReceiveMessage = true
// close(s.messageChan)
}
}
}()
s.log.Info("Handle message core stop.")
}
//ListenError listen error chan
func (s *EventLogServer) ListenError() chan error {
return s.listenErr
}