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class EventChannel
class << self
def setup
return if @dalli
@dalli = Dalli::Client.new(Settings.memcached, namespace: "aclog-collector-proxy")
@queue = []
@subscribers = {}
end
def push(data)
raise ScriptError, "Call EventChannel.setup first" unless @dalli
if id = data[:identifier]
key, val = id.split("#", 2)
cur = @dalli.get(key)
if cur && (!val || (cur <=> val) > -1)
CollectorProxy.logger.debug("UniqueChannel") { "Duplicate event: #{key}" }
return
else
@dalli.set(key, val || true)
end
end
if @subscribers.size > 0
@subscribers.values.each do |blk|
blk.call(data)
end
else
@queue << data
end
end
alias << push
def subscribe(&blk)
@subscribers[blk.__id__] = blk
while @queue.size > 0
blk.call(@queue.shift)
end
blk.__id__
end
def unsubscribe(id)
@subscribers.delete(id)
end
end
end
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