/
route.go
128 lines (114 loc) · 2.04 KB
/
route.go
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package event
import (
"container/list"
"sync"
)
type route struct {
sync.RWMutex
topic string
tokens *list.List
delTokenChan chan *Token
delRouteChan chan<- *route
quit chan struct{}
complete chan struct{}
}
func newRoute(topic string, callback Handler, delRouteChan chan<- *route) (*route, *Token) {
delTokenChan := make(chan *Token)
token := newToken(callback, delTokenChan)
tokens := list.New()
tokens.PushBack(token)
r := &route{
topic: topic,
tokens: tokens,
delTokenChan: delTokenChan,
delRouteChan: delRouteChan,
quit: make(chan struct{}),
complete: make(chan struct{}),
}
go r.process()
return r, token
}
func (r *route) isClose() bool {
select {
case <-r.quit:
return true
default:
return false
}
}
func (r *route) close() {
select {
case <-r.quit:
default:
close(r.quit)
r.RLock()
for e := r.tokens.Front(); e != nil; e = e.Next() {
e.Value.(*Token).Close()
}
r.RUnlock()
}
}
func (r *route) done() {
r.close()
<-r.complete
}
func (r *route) flowQuit() {
select {
case <-r.quit:
default:
close(r.quit)
}
}
func (r *route) flowComplete() {
select {
case <-r.complete:
default:
close(r.complete)
close(r.delTokenChan)
r.delRouteChan <- r
}
}
func (r *route) addToken(callback Handler) *Token {
r.Lock()
defer r.Unlock()
select {
case <-r.quit:
return nil
default:
token := newToken(callback, r.delTokenChan)
r.tokens.PushBack(token)
return token
}
}
func (r *route) delToken(token *Token) {
r.Lock()
defer r.Unlock()
defer func() {
if r.tokens.Len() == 0 {
r.flowQuit()
r.flowComplete()
}
}()
for e := r.tokens.Front(); e != nil; e = e.Next() {
if e.Value.(*Token).id == token.id {
r.tokens.Remove(e)
return
}
}
}
func (r *route) process() {
for token := range r.delTokenChan {
r.delToken(token)
}
}
func (r *route) publish(event *Event) {
select {
case <-r.quit:
default:
r.RLock()
for e := r.tokens.Front(); e != nil; e = e.Next() {
e.Value.(*Token).publish(event)
}
r.RUnlock()
}
}