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server_std.go
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server_std.go
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//go:build windows
// +build windows
package gev
import (
"errors"
"io"
"net"
stdsync "sync"
at "sync/atomic"
"time"
"github.com/Allenxuxu/gev/log"
"github.com/Allenxuxu/gev/poller"
"github.com/Allenxuxu/ringbuffer"
"github.com/Allenxuxu/toolkit/sync"
"github.com/Allenxuxu/toolkit/sync/atomic"
"github.com/RussellLuo/timingwheel"
)
// Handler Server 注册接口
type Handler interface {
CallBack
OnConnect(c *Connection)
}
// Server gev Server
type Server struct {
listener net.Listener
callback Handler
connections stdsync.Map
timingWheel *timingwheel.TimingWheel
opts *Options
running atomic.Bool
dying chan struct{}
}
// NewServer 创建 Server
func NewServer(handler Handler, opts ...Option) (server *Server, err error) {
if handler == nil {
return nil, errors.New("handler is nil")
}
options := newOptions(opts...)
server = new(Server)
server.dying = make(chan struct{})
server.callback = handler
server.opts = options
server.timingWheel = timingwheel.NewTimingWheel(server.opts.tick, server.opts.wheelSize)
server.listener, err = net.Listen(server.opts.Network, server.opts.Address)
if err != nil {
return nil, err
}
return
}
// RunAfter 延时任务
func (s *Server) RunAfter(d time.Duration, f func()) *timingwheel.Timer {
return s.timingWheel.AfterFunc(d, f)
}
// RunEvery 定时任务
func (s *Server) RunEvery(d time.Duration, f func()) *timingwheel.Timer {
return s.timingWheel.ScheduleFunc(&everyScheduler{Interval: d}, f)
}
// Start 启动 Server
func (s *Server) Start() {
sw := sync.WaitGroupWrapper{}
s.timingWheel.Start()
if s.opts.NumLoops <= 0 {
s.opts.NumLoops = 1
}
for i := 0; i < s.opts.NumLoops; i++ {
sw.AddAndRun(func() {
for {
select {
case <-s.dying:
return
default:
conn, err := s.listener.Accept()
if err != nil {
log.Errorf("accept error: %v", err)
continue
}
connection := NewConnection(conn, s.opts.Protocol, s.timingWheel, s.opts.IdleTime, s.callback)
s.connections.Store(connection, struct{}{})
sw.AddAndRun(func() {
connection.readLoop()
})
sw.AddAndRun(func() {
connection.writeLoop()
})
sw.AddAndRun(func() {
s.callback.OnConnect(connection)
})
}
}
})
}
s.running.Set(true)
log.Infof("server run in windows")
sw.Wait()
}
// Stop 关闭 Server
func (s *Server) Stop() {
if s.running.Get() {
close(s.dying)
s.running.Set(false)
s.timingWheel.Stop()
if err := s.listener.Close(); err != nil {
log.Error(err)
}
s.connections.Range(func(key, value interface{}) bool {
c := key.(*Connection)
c.Close()
return true
})
}
}
// Options 返回 options
func (s *Server) Options() Options {
return *s.opts
}
// connection
type CallBack interface {
OnMessage(c *Connection, ctx interface{}, data []byte) interface{}
OnClose(c *Connection)
}
// Connection TCP 连接
type Connection struct {
conn net.Conn
connected atomic.Bool
dying chan struct{}
userBuffer *[]byte
buffer *ringbuffer.RingBuffer
outBuffer *ringbuffer.RingBuffer // write buffer
inBuffer *ringbuffer.RingBuffer // read buffer
outBufferLen atomic.Int64
inBufferLen atomic.Int64
callBack CallBack
ctx interface{}
KeyValueContext
mu stdsync.Mutex
taskQueueW []func()
taskQueueR []func()
idleTime time.Duration
activeTime atomic.Int64
timingWheel *timingwheel.TimingWheel
timer at.Value
protocol Protocol
}
var ErrConnectionClosed = errors.New("connection closed")
// NewConnection 创建 Connection
func NewConnection(
conn net.Conn,
protocol Protocol,
tw *timingwheel.TimingWheel,
idleTime time.Duration,
callBack CallBack) *Connection {
userBuffer := make([]byte, 4096)
connection := &Connection{
conn: conn,
dying: make(chan struct{}),
outBuffer: ringbuffer.GetFromPool(),
inBuffer: ringbuffer.GetFromPool(),
callBack: callBack,
idleTime: idleTime,
timingWheel: tw,
protocol: protocol,
buffer: ringbuffer.New(0),
taskQueueW: make([]func(), 0, 1024),
taskQueueR: make([]func(), 0, 1024),
userBuffer: &userBuffer,
}
connection.connected.Set(true)
if connection.idleTime > 0 {
_ = connection.activeTime.Swap(time.Now().Unix())
timer := connection.timingWheel.AfterFunc(connection.idleTime, connection.closeTimeoutConn())
connection.timer.Store(timer)
}
return connection
}
func (c *Connection) UserBuffer() *[]byte {
return c.userBuffer
}
// Context 获取 Context
func (c *Connection) Context() interface{} {
return c.ctx
}
// SetContext 设置 Context
func (c *Connection) SetContext(ctx interface{}) {
c.ctx = ctx
}
// PeerAddr 获取客户端地址信息
func (c *Connection) PeerAddr() string {
return c.conn.RemoteAddr().String()
}
// Connected 是否已连接
func (c *Connection) Connected() bool {
return c.connected.Get()
}
// Send 用来在非 loop 协程发送
func (c *Connection) Send(data interface{}, opts ...ConnectionOption) error {
if !c.connected.Get() {
return ErrConnectionClosed
}
opt := ConnectionOptions{}
for _, o := range opts {
o(&opt)
}
f := func() {
if c.connected.Get() {
c.sendInLoop(c.protocol.Packet(c, data))
if opt.sendInLoopFinish != nil {
opt.sendInLoopFinish(data)
}
}
}
c.mu.Lock()
c.taskQueueW = append(c.taskQueueW, f)
c.mu.Unlock()
return nil
}
// Close 关闭连接
func (c *Connection) Close() error {
if c.connected.Get() {
close(c.dying)
c.connected.Set(false)
c.callBack.OnClose(c)
if v := c.timer.Load(); v != nil {
timer := v.(*timingwheel.Timer)
timer.Stop()
}
return c.conn.Close()
}
return nil
}
// ShutdownWrite 关闭可写端,等待读取完接收缓冲区所有数据
func (c *Connection) ShutdownWrite() error {
return c.Close()
}
// ReadBufferLength read buffer 当前积压的数据长度
func (c *Connection) ReadBufferLength() int64 {
return c.inBufferLen.Get()
}
// WriteBufferLength write buffer 当前积压的数据长度
func (c *Connection) WriteBufferLength() int64 {
return c.outBufferLen.Get()
}
// HandleEvent 内部使用,event loop 回调
func (c *Connection) HandleEvent(fd int, events poller.Event) {
}
func (c *Connection) readLoop() {
buf := make([]byte, 0, 66635)
for {
select {
case <-c.dying:
return
default:
n, err := c.conn.Read(buf)
if err != nil {
if err != io.EOF {
log.Info("read error: ", err)
}
c.Close()
return
}
_, _ = c.inBuffer.Write(buf[:n])
buf = buf[:0]
c.handlerProtocol(&buf, c.inBuffer)
if len(buf) != 0 {
tmp := make([]byte, len(buf))
copy(tmp, buf)
_ = c.Send(tmp)
}
buf = buf[:cap(buf)]
if c.idleTime > 0 {
_ = c.activeTime.Swap(time.Now().Unix())
}
c.inBufferLen.Swap(int64(c.inBuffer.Length()))
}
}
}
func (c *Connection) writeLoop() {
for {
select {
case <-c.dying:
return
default:
c.doPendingFunc()
if c.outBuffer.IsEmpty() {
continue
}
first, end := c.outBuffer.PeekAll()
n, err := c.conn.Write(first)
if err != nil {
log.Error("Write error: ", err)
c.Close()
return
}
c.outBuffer.Retrieve(n)
if n == len(first) && len(end) > 0 {
n, err = c.conn.Write(end)
if err != nil {
log.Error("Write error: ", err)
c.Close()
return
}
c.outBuffer.Retrieve(n)
}
if c.idleTime > 0 {
_ = c.activeTime.Swap(time.Now().Unix())
}
c.outBufferLen.Swap(int64(c.outBuffer.Length()))
}
}
}
func (c *Connection) doPendingFunc() {
c.mu.Lock()
c.taskQueueW, c.taskQueueR = c.taskQueueR, c.taskQueueW
c.mu.Unlock()
length := len(c.taskQueueR)
for i := 0; i < length; i++ {
c.taskQueueR[i]()
}
c.taskQueueR = c.taskQueueR[:0]
}
func (c *Connection) sendInLoop(data []byte) (closed bool) {
if !c.outBuffer.IsEmpty() {
_, _ = c.outBuffer.Write(data)
} else {
n, err := c.conn.Write(data)
if err != nil {
log.Error("Write error: ", err)
c.Close()
return true
}
if n <= 0 {
_, _ = c.outBuffer.Write(data)
} else if n < len(data) {
_, _ = c.outBuffer.Write(data[n:])
}
}
return false
}
func (c *Connection) handlerProtocol(tmpBuffer *[]byte, buffer *ringbuffer.RingBuffer) {
ctx, receivedData := c.protocol.UnPacket(c, buffer)
for ctx != nil || len(receivedData) != 0 {
sendData := c.callBack.OnMessage(c, ctx, receivedData)
if sendData != nil {
*tmpBuffer = append(*tmpBuffer, c.protocol.Packet(c, sendData)...)
}
ctx, receivedData = c.protocol.UnPacket(c, buffer)
}
}
func (c *Connection) closeTimeoutConn() func() {
return func() {
now := time.Now()
intervals := now.Sub(time.Unix(c.activeTime.Get(), 0))
if intervals >= c.idleTime {
_ = c.Close()
} else {
timer := c.timingWheel.AfterFunc(c.idleTime-intervals, c.closeTimeoutConn())
c.timer.Store(timer)
}
}
}