forked from Gitlink/gitea-1120-rc1
79 lines
1.8 KiB
Go
79 lines
1.8 KiB
Go
// Copyright 2020 The Gitea Authors. All rights reserved.
|
|
// Use of this source code is governed by a MIT-style
|
|
// license that can be found in the LICENSE file.
|
|
|
|
package eventsource
|
|
|
|
import "sync"
|
|
|
|
// Messenger is a per uid message store
|
|
type Messenger struct {
|
|
mutex sync.Mutex
|
|
uid int64
|
|
channels []chan *Event
|
|
}
|
|
|
|
// NewMessenger creates a messenger for a particular uid
|
|
func NewMessenger(uid int64) *Messenger {
|
|
return &Messenger{
|
|
uid: uid,
|
|
channels: [](chan *Event){},
|
|
}
|
|
}
|
|
|
|
// Register returns a new chan []byte
|
|
func (m *Messenger) Register() <-chan *Event {
|
|
m.mutex.Lock()
|
|
// TODO: Limit the number of messengers per uid
|
|
channel := make(chan *Event, 1)
|
|
m.channels = append(m.channels, channel)
|
|
m.mutex.Unlock()
|
|
return channel
|
|
}
|
|
|
|
// Unregister removes the provider chan []byte
|
|
func (m *Messenger) Unregister(channel <-chan *Event) bool {
|
|
m.mutex.Lock()
|
|
defer m.mutex.Unlock()
|
|
for i, toRemove := range m.channels {
|
|
if channel == toRemove {
|
|
m.channels = append(m.channels[:i], m.channels[i+1:]...)
|
|
close(toRemove)
|
|
break
|
|
}
|
|
}
|
|
return len(m.channels) == 0
|
|
}
|
|
|
|
// UnregisterAll removes all chan []byte
|
|
func (m *Messenger) UnregisterAll() {
|
|
m.mutex.Lock()
|
|
defer m.mutex.Unlock()
|
|
for _, channel := range m.channels {
|
|
close(channel)
|
|
}
|
|
m.channels = nil
|
|
}
|
|
|
|
// SendMessage sends the message to all registered channels
|
|
func (m *Messenger) SendMessage(message *Event) {
|
|
m.mutex.Lock()
|
|
defer m.mutex.Unlock()
|
|
for i := range m.channels {
|
|
channel := m.channels[i]
|
|
select {
|
|
case channel <- message:
|
|
default:
|
|
}
|
|
}
|
|
}
|
|
|
|
// SendMessageBlocking sends the message to all registered channels and ensures it gets sent
|
|
func (m *Messenger) SendMessageBlocking(message *Event) {
|
|
m.mutex.Lock()
|
|
defer m.mutex.Unlock()
|
|
for i := range m.channels {
|
|
m.channels[i] <- message
|
|
}
|
|
}
|