Created
August 30, 2012 20:56
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# Wrap a fiber around app_call | |
Fiber.new{ | |
# [...] | |
# Below is modified from event_machine/client.rb, in def app_call input, | |
# but let's forget about :async for now. | |
# In APP.call, it would call Fiber.yield whenever we're waiting for data. | |
status, headers, body = APP.call(@env.merge!(RACK_DEFAULTS)) | |
# The response is fully ready at this point. | |
ev_write_response(status, headers, body, @hp.next?) | |
}.resume | |
# * * * * * | |
# Here's the app | |
APP = lambda{ |env| | |
# First we remember where we need to jump back | |
f = Fiber.current | |
# Wait for 5 seconds to emulate waiting for data | |
EM.add_timer(5){ | |
# Here then we have data available, let's resume back. | |
# But we also wrap resuming in a next_tick block, | |
# giving EM some chances to cleanup it's internal states. | |
EM.next_tick{ | |
f.resume('OK') | |
} | |
} | |
# Here we immediately yield and give control back to Rainbows! | |
# and Rainbows! would then go back to EventMachine's regular loop, | |
# buffering requests, making requests, etc. | |
body = Fiber.yield | |
# So now body is referring the data resumed from above. | |
# Rainbows! should handle the response at this point. | |
[200, {}, [body]] | |
} |
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