mirror of
https://github.com/overleaf/overleaf.git
synced 2024-11-14 20:40:17 -05:00
60 lines
2.6 KiB
CoffeeScript
60 lines
2.6 KiB
CoffeeScript
Settings = require 'settings-sharelatex'
|
|
logger = require 'logger-sharelatex'
|
|
RedisClientManager = require "./RedisClientManager"
|
|
SafeJsonParse = require "./SafeJsonParse"
|
|
EventLogger = require "./EventLogger"
|
|
HealthCheckManager = require "./HealthCheckManager"
|
|
|
|
module.exports = WebsocketLoadBalancer =
|
|
rclientPubList: RedisClientManager.createClientList(Settings.redis.pubsub)
|
|
rclientSubList: RedisClientManager.createClientList(Settings.redis.pubsub, Settings.redis.unusedpubsub)
|
|
|
|
emitToRoom: (room_id, message, payload...) ->
|
|
if !room_id?
|
|
logger.warn {message, payload}, "no room_id provided, ignoring emitToRoom"
|
|
return
|
|
data = JSON.stringify
|
|
room_id: room_id
|
|
message: message
|
|
payload: payload
|
|
logger.log {room_id, message, payload, length: data.length}, "emitting to room"
|
|
for rclientPub in @rclientPubList
|
|
rclientPub.publish "editor-events", data
|
|
|
|
emitToAll: (message, payload...) ->
|
|
@emitToRoom "all", message, payload...
|
|
|
|
listenForEditorEvents: (io) ->
|
|
logger.log {rclients: @rclientPubList.length}, "publishing editor events"
|
|
logger.log {rclients: @rclientSubList.length}, "listening for editor events"
|
|
for rclientSub in @rclientSubList
|
|
rclientSub.subscribe "editor-events"
|
|
rclientSub.on "message", (channel, message) ->
|
|
EventLogger.debugEvent(channel, message) if Settings.debugEvents > 0
|
|
WebsocketLoadBalancer._processEditorEvent io, channel, message
|
|
|
|
_processEditorEvent: (io, channel, message) ->
|
|
SafeJsonParse.parse message, (error, message) ->
|
|
if error?
|
|
logger.error {err: error, channel}, "error parsing JSON"
|
|
return
|
|
if message.room_id == "all"
|
|
io.sockets.emit(message.message, message.payload...)
|
|
else if message.room_id?
|
|
if message._id?
|
|
status = EventLogger.checkEventOrder("editor-events", message._id, message)
|
|
if status is "duplicate"
|
|
return # skip duplicate events
|
|
# send messages only to unique clients (due to duplicate entries in io.sockets.clients)
|
|
clientList = io.sockets.clients(message.room_id)
|
|
# avoid unnecessary work if no clients are connected
|
|
return if clientList.length is 0
|
|
logger.log {channel:channel, message: message.message, room_id: message.room_id, message_id: message._id, socketIoClients: (client.id for client in clientList)}, "distributing event to clients"
|
|
seen = {}
|
|
for client in clientList when not seen[client.id]
|
|
seen[client.id] = true
|
|
client.emit(message.message, message.payload...)
|
|
else if message.health_check?
|
|
logger.debug {message}, "got health check message in editor events channel"
|
|
HealthCheckManager.check channel, message.key
|
|
|