diff options
Diffstat (limited to 'actioncable/app/assets/javascripts/action_cable/connection_monitor.coffee')
-rw-r--r-- | actioncable/app/assets/javascripts/action_cable/connection_monitor.coffee | 95 |
1 files changed, 0 insertions, 95 deletions
diff --git a/actioncable/app/assets/javascripts/action_cable/connection_monitor.coffee b/actioncable/app/assets/javascripts/action_cable/connection_monitor.coffee deleted file mode 100644 index 0cc675fa94..0000000000 --- a/actioncable/app/assets/javascripts/action_cable/connection_monitor.coffee +++ /dev/null @@ -1,95 +0,0 @@ -# Responsible for ensuring the cable connection is in good health by validating the heartbeat pings sent from the server, and attempting -# revival reconnections if things go astray. Internal class, not intended for direct user manipulation. -class ActionCable.ConnectionMonitor - @pollInterval: - min: 3 - max: 30 - - @staleThreshold: 6 # Server::Connections::BEAT_INTERVAL * 2 (missed two pings) - - constructor: (@connection) -> - @reconnectAttempts = 0 - - start: -> - unless @isRunning() - @startedAt = now() - delete @stoppedAt - @startPolling() - document.addEventListener("visibilitychange", @visibilityDidChange) - ActionCable.log("ConnectionMonitor started. pollInterval = #{@getPollInterval()} ms") - - stop: -> - if @isRunning() - @stoppedAt = now() - @stopPolling() - document.removeEventListener("visibilitychange", @visibilityDidChange) - ActionCable.log("ConnectionMonitor stopped") - - isRunning: -> - @startedAt? and not @stoppedAt? - - recordPing: -> - @pingedAt = now() - - recordConnect: -> - @reconnectAttempts = 0 - @recordPing() - delete @disconnectedAt - ActionCable.log("ConnectionMonitor recorded connect") - - recordDisconnect: -> - @disconnectedAt = now() - ActionCable.log("ConnectionMonitor recorded disconnect") - - # Private - - startPolling: -> - @stopPolling() - @poll() - - stopPolling: -> - clearTimeout(@pollTimeout) - - poll: -> - @pollTimeout = setTimeout => - @reconnectIfStale() - @poll() - , @getPollInterval() - - getPollInterval: -> - {min, max} = @constructor.pollInterval - interval = 5 * Math.log(@reconnectAttempts + 1) - Math.round(clamp(interval, min, max) * 1000) - - reconnectIfStale: -> - if @connectionIsStale() - ActionCable.log("ConnectionMonitor detected stale connection. reconnectAttempts = #{@reconnectAttempts}, pollInterval = #{@getPollInterval()} ms, time disconnected = #{secondsSince(@disconnectedAt)} s, stale threshold = #{@constructor.staleThreshold} s") - @reconnectAttempts++ - if @disconnectedRecently() - ActionCable.log("ConnectionMonitor skipping reopening recent disconnect") - else - ActionCable.log("ConnectionMonitor reopening") - @connection.reopen() - - connectionIsStale: -> - secondsSince(@pingedAt ? @startedAt) > @constructor.staleThreshold - - disconnectedRecently: -> - @disconnectedAt and secondsSince(@disconnectedAt) < @constructor.staleThreshold - - visibilityDidChange: => - if document.visibilityState is "visible" - setTimeout => - if @connectionIsStale() or not @connection.isOpen() - ActionCable.log("ConnectionMonitor reopening stale connection on visibilitychange. visbilityState = #{document.visibilityState}") - @connection.reopen() - , 200 - - now = -> - new Date().getTime() - - secondsSince = (time) -> - (now() - time) / 1000 - - clamp = (number, min, max) -> - Math.max(min, Math.min(max, number)) |