46 lines
1.2 KiB
Ruby
46 lines
1.2 KiB
Ruby
module EventMachine
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# This is subclassed from EventMachine::Connection for use with the process monitoring API. Read the
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# documentation on the instance methods of this class, and for a full explanation see EventMachine.watch_process.
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class ProcessWatch < Connection
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# @private
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Cfork = 'fork'.freeze
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# @private
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Cexit = 'exit'.freeze
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# @private
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def receive_data(data)
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case data
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when Cfork
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process_forked
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when Cexit
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process_exited
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end
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end
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# Returns the pid that EventMachine::watch_process was originally called with.
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def pid
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@pid
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end
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# Should be redefined with the user's custom callback that will be fired when the prcess is forked.
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#
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# There is currently not an easy way to get the pid of the forked child.
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def process_forked
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end
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# Should be redefined with the user's custom callback that will be fired when the process exits.
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#
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# stop_watching is called automatically after this callback
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def process_exited
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end
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# Discontinue monitoring of the process.
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# This will be called automatically when a process dies. User code may call it as well.
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def stop_watching
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EventMachine::unwatch_pid(@signature)
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end
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end
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end
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