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begin
require 'mysql2/em'
rescue LoadError => error
raise 'Missing EM-Synchrony dependency: gem install mysql2'
end
module Mysql2
module EM
class Client
module Watcher
def notify_readable
detach
begin
result = @client.async_result
rescue Exception => e
@deferable.fail(e)
else
@deferable.succeed(result)
end
end
end
alias :aquery :query
def query(sql, opts={})
deferable = aquery(sql, opts)
# if EM is not running, we just get the sql result directly
# if we get a deferable, then let's do the deferable thing.
return deferable unless deferable.kind_of? ::EM::DefaultDeferrable
f = Fiber.current
deferable.callback { |res| f.resume(res) }
deferable.errback { |err| f.resume(err) }
Fiber.yield.tap do |result|
raise result if result.is_a?(::Exception)
end
end
end
end
end
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