Class Mainloop

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Generic mainloop for daemons

Instance Methods

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__init__(self)
Constructs a new Mainloop instance.

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Run(self, shutdown_wait_fn=None, signal_handlers=None)
Runs the mainloop.

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_CallSignalWaiters(self, signum)
Calls all signal waiters for a certain signal.

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RegisterSignal(self, owner)
Registers a receiver for signal notifications

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Inherited from object: __delattr__, __format__, __getattribute__, __hash__, __new__, __reduce__, __reduce_ex__, __repr__, __setattr__, __sizeof__, __str__, __subclasshook__

Class Variables

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_SHUTDOWN_TIMEOUT_PRIORITY = -(sys.maxint-1)

Instance Variables

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scheduler
A sched.scheduler object, which can be used to register timed events

Properties

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Inherited from object: __class__

Method Details

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init(self)
(Constructor)

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Constructs a new Mainloop instance.

Overrides: object.__init__

Run(self, shutdown_wait_fn=None, signal_handlers=None)

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Runs the mainloop.

Parameters:

shutdown_wait_fn (callable) - Function to check whether loop can be terminated; important: function must be idempotent and must return either None for shutting down or a timeout for another call
signal_handlers (dict) - signal->utils.SignalHandler passed by decorator

Decorators:

@utils.SignalHandled([signal.SIGCHLD])
@utils.SignalHandled([signal.SIGTERM])
@utils.SignalHandled([signal.SIGINT])

_CallSignalWaiters(self, signum)

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Calls all signal waiters for a certain signal.

Parameters:

signum (int) - Signal number

RegisterSignal(self, owner)

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Registers a receiver for signal notifications

The receiver must support a "OnSignal(self, signum)" function.

Parameters:

owner (instance) - Receiver

Class Mainloop

__init__(self) (Constructor)

Run(self, shutdown_wait_fn=None, signal_handlers=None)

_CallSignalWaiters(self, signum)

RegisterSignal(self, owner)

init(self)
(Constructor)