Class: ConditionalWait
Defined Under Namespace
Classes: TimeoutError
Class Method Summary
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Instance Method Summary
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#bind_thread, included, #target_thread, #target_thread?, #thread_check
Constructor Details
Returns a new instance of ConditionalWait.
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# File 'lib/wakame/util.rb', line 468
def initialize(&blk)
bind_thread
@wait_queue = ::Queue.new
@wait_tickets = []
@poll_threads = []
@event_tickets = []
blk.call(self) if blk
end
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Class Method Details
.wait(timeout = 60*30, &blk) ⇒ Object
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# File 'lib/wakame/util.rb', line 568
def self.wait(timeout=60*30, &blk)
cond = ConditionalWait.new
cond.bind_thread(Thread.current)
blk.call(cond)
cond.wait(timeout)
end
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Instance Method Details
#poll(period = 5, max_retry = 10, &blk) ⇒ Object
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# File 'lib/wakame/util.rb', line 478
def poll( period=5, max_retry=10, &blk)
wticket = Wakame::Util.gen_id
@poll_threads << Thread.new {
retry_count = 0
begin
catch(:finish) {
while retry_count < max_retry
start_at = Time.now
if blk.call == true
throw :finish
end
Thread.pass
if period > 0
t = Time.now - start_at
sleep (period - t) if period > t
end
retry_count += 1
end
}
if retry_count >= max_retry
Wakame.log.error('Over retry count')
raise 'Over retry count'
end
rescue => e
Wakame.log.error(e)
@wait_queue << [false, wticket, e]
else
@wait_queue << [true, wticket]
end
}
@poll_threads.last[:name]="#{self.class} poll"
@wait_tickets << wticket
end
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#wait(tout = nil) ⇒ Object
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# File 'lib/wakame/util.rb', line 538
def wait(tout=nil)
unless @wait_tickets.empty?
Wakame.log.debug("#{self.class} waits for #{@wait_tickets.size} num of event(s)/polling(s).")
timeout(tout, TimeoutError) {
while @wait_tickets.size > 0 && q = @wait_queue.shift
@wait_tickets.delete(q[1])
unless q[0]
Wakame.log.debug("#{q[1]} failed with #{q[2]}")
raise q[2]
end
end
}
end
ensure
@poll_threads.each { |t|
begin
t.kill
rescue => e
Wakame.log.error(e)
end
}
@event_tickets.each { |t| Wakame::EventDispatcher.unsubscribe(t) }
end
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#wait_event(event_class, &blk) ⇒ Object
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# File 'lib/wakame/util.rb', line 517
def wait_event(event_class, &blk)
wticket = Wakame::Util.gen_id
Wakame.log.debug("#{self.class} called wait_event(#{event_class}) on thread #{Thread.current} (target_thread=#{self.target_thread?}). has_blk=#{blk}")
ticket = Wakame::EventDispatcher.subscribe(event_class) { |event|
begin
if blk.call(event) == true
Wakame::EventDispatcher.unsubscribe(ticket)
@wait_queue << [true, wticket]
end
rescue => e
Wakame.log.error(e)
Wakame::EventDispatcher.unsubscribe(ticket)
@wait_queue << [false, wticket, e]
end
}
@event_tickets << ticket
@wait_tickets << wticket
end
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