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updated: realtime-chat to use channel instead of accessing directly t…
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Original file line number | Diff line number | Diff line change |
---|---|---|
@@ -1,33 +1,107 @@ | ||
package main | ||
|
||
import "github.com/dustin/go-broadcast" | ||
import ( | ||
"github.com/dustin/go-broadcast" | ||
) | ||
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var roomChannels = make(map[string]broadcast.Broadcaster) | ||
type Message struct { | ||
UserId string | ||
RoomId string | ||
Text string | ||
} | ||
|
||
func openListener(roomid string) chan interface{} { | ||
listener := make(chan interface{}) | ||
room(roomid).Register(listener) | ||
return listener | ||
type Listener struct { | ||
RoomId string | ||
Chan chan interface{} | ||
} | ||
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type Manager struct { | ||
roomChannels map[string]broadcast.Broadcaster | ||
open chan *Listener | ||
close chan *Listener | ||
delete chan string | ||
messages chan *Message | ||
} | ||
|
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func NewRoomManager() *Manager { | ||
manager := &Manager{ | ||
roomChannels: make(map[string]broadcast.Broadcaster), | ||
open: make(chan *Listener, 100), | ||
close: make(chan *Listener, 100), | ||
delete: make(chan string, 100), | ||
messages: make(chan *Message, 100), | ||
} | ||
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go manager.run() | ||
return manager | ||
} | ||
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func (m *Manager) run() { | ||
for { | ||
select { | ||
case listener := <- m.open: | ||
m.register(listener) | ||
case listener := <- m.close: | ||
m.deregister(listener) | ||
case roomid := <- m.delete: | ||
m.deleteBroadcast(roomid) | ||
case message := <- m.messages: | ||
m.room(message.RoomId).Submit(message.UserId + ": " + message.Text) | ||
} | ||
} | ||
} | ||
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func (m *Manager) register(listener *Listener) { | ||
m.room(listener.RoomId).Register(listener.Chan) | ||
} | ||
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func closeListener(roomid string, listener chan interface{}) { | ||
room(roomid).Unregister(listener) | ||
close(listener) | ||
func (m *Manager) deregister(listener *Listener) { | ||
m.room(listener.RoomId).Unregister(listener.Chan) | ||
close(listener.Chan) | ||
} | ||
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func deleteBroadcast(roomid string) { | ||
b, ok := roomChannels[roomid] | ||
func (m *Manager) deleteBroadcast(roomid string) { | ||
b, ok := m.roomChannels[roomid] | ||
if ok { | ||
b.Close() | ||
delete(roomChannels, roomid) | ||
delete(m.roomChannels, roomid) | ||
} | ||
} | ||
|
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func room(roomid string) broadcast.Broadcaster { | ||
b, ok := roomChannels[roomid] | ||
func (m *Manager) room(roomid string) broadcast.Broadcaster { | ||
b, ok := m.roomChannels[roomid] | ||
if !ok { | ||
b = broadcast.NewBroadcaster(10) | ||
roomChannels[roomid] = b | ||
m.roomChannels[roomid] = b | ||
} | ||
return b | ||
} | ||
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func (m *Manager) OpenListener(roomid string) chan interface{}{ | ||
listener := make(chan interface{}) | ||
m.open <- &Listener{ | ||
RoomId: roomid, | ||
Chan: listener, | ||
} | ||
return listener | ||
} | ||
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func (m *Manager) CloseListener(roomid string, channel chan interface{}) { | ||
m.close <- &Listener{ | ||
RoomId: roomid, | ||
Chan: channel, | ||
} | ||
} | ||
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||
func (m *Manager) DeleteBroadcast(roomid string) { | ||
m.delete <- roomid | ||
} | ||
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func (m *Manager) Submit (userid, roomid, text string) { | ||
msg := &Message{ | ||
UserId: userid, | ||
RoomId: roomid, | ||
Text: text, | ||
} | ||
m.messages <- msg | ||
} |