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add a double message check

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This commit is contained in:
Henry Oswald 2014-11-20 12:50:19 +00:00
parent 119ae80853
commit 917ce27a2c
1 changed files with 6 additions and 1 deletions
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7
libraries/redis-wrapper/index.coffee
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@ -26,6 +26,7 @@ module.exports = RedisSharelatex =
pub = RedisSharelatex.createClient(connectionInfo)
redisIsOk = true
lastPingMessage = ""
heartbeatInterval = 2000 #ms
isAliveTimeout = 10000 #ms
@ -37,11 +38,15 @@ module.exports = RedisSharelatex =
if error?
console.error "ERROR: failed to subscribe to #{heartbeatChannel} channel", error
sub.on "message", (channel, message) ->
if lastPingMessage == message #we got the same message twice
redisIsOk = false
lastPingMessage = message
if channel == heartbeatChannel
lastHeartbeat = Date.now()
setInterval ->
pub.publish heartbeatChannel, "PING"
message = "ping:#{Date.now()}"
pub.publish heartbeatChannel, message
, heartbeatInterval
isAlive = ->