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Contents
require 'zookeeper'
require 'eventmachine'
module ZookeeperEM
class Client < Zookeeper::Client
# @private
# the EM Connection instance we receive once we call EM.watch on our selectable_io
attr_reader :em_connection
def initialize(*a, &b)
@on_close = EM::DefaultDeferrable.new
@on_attached = EM::DefaultDeferrable.new
@em_connection = nil
logger.debug { "ZookeeperEM::Client obj_id %x: init" % [object_id] }
super(*a, &b)
on_attached.succeed
end
# EM::DefaultDeferrable that will be called back when our em_connection has been detached
# and we've completed the close operation
def on_close(&block)
@on_close.callback(&block) if block
@on_close
end
# called after we've successfully registered our selectable_io to be
# managed by the EM reactor
def on_attached(&block)
@on_attached.callback(&block) if block
@on_attached
end
def dispatch_next_callback(hash)
EM.schedule do
if running? and not closed?
logger.debug { "#{self.class}##{__method__} dispatch_next_callback: #{hash.inspect}: reactor_thread? #{EM.reactor_thread?}, running? #{running?}, closed? #{closed?}" }
super(hash)
end
end
end
def close(&block)
on_close(&block)
super()
on_close.succeed
end
# Because eventmachine is single-threaded, and events are dispatched on the
# reactor thread we just delegate this to EM.reactor_thread?
def event_dispatch_thread?
EM.reactor_thread?
end
end # Client
end # ZookeeperEM
Version data entries
87 entries across 87 versions & 2 rubygems