Performing an orderly shutdown with OTP
Wed Jan 14 20:55:26 CET 2004
On Wed, Jan 14, 2004 at 09:55:49AM +0100, Ulf Wiger wrote:
} The supervisor behaviour terminates its children in the
} reverse of the order in which they were started.
Which may not be the order I want them terminated. Hmmm ...
And then it should follow that applications will be shutdown
in reverse order as well since they are all under one supervisor.
} The start/2 callback allows the user to return a state,
} which is then passed on to the stop/1 callback once the
} processes of the application have been terminated.
} The prep_stop/1 callback is called _before_ the processes
} start terminating.
Ah yes. So I can do my owm terminating here. I'll save the
Pids of my supervisors and in prep_stop/1 I can kill them off
in the order I require. Perfect.
} - prep_stop/1 is used in some occasions to close incoming
} signaling ports before the processes start dying. This is
} to reduce the noise when killing processes and removing
} ets tables.
This is exactly the sort of thing I want to handle. These are
processes which would have been started first but should be
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