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module Vedeu
# Provides the main loop for a Vedeu application.
#
# Each time Vedeu starts one cycle in the application loop, it triggers the
# `:tick` event. A completion of that cycle will trigger `:tock`. This can be
# used by the client application for timing amongst other things.
class MainLoop
trap('SIGTERM') { stop! }
trap('TERM') { stop! }
trap('INT') { stop! }
# :nocov:
# Start the main loop.
#
# @return [void]
# @yieldreturn [void] The client application.
def self.start!
@started = true
@loop = true
while @loop
yield
safe_exit_point!
end
rescue VedeuInterrupt
Vedeu.log(type: :debug, message: 'Vedeu execution interrupted, exiting.')
end
# :nocov:
# Signal that we wish to terminate the running application.
#
# @return [void]
def self.stop!
@loop = false
end
# Check the application has started and we wish to continue running.
#
# @raise [VedeuInterrupt] When we wish to terminate the running application.
# @return [void]
def self.safe_exit_point!
if @started && !@loop
fail VedeuInterrupt
else
Vedeu.trigger(:tock, Time.now.to_f)
end
end
end # MainLoop
end # Vedeu
Version data entries
13 entries across 13 versions & 1 rubygems