_NodeCallback

Encapsulate a weak reference to a method of a _TopicTreeNode in such a way that the method can be called, if the node is still alive, but the callback does not keep the node alive. Also, define two methods, preNotify() and noNotify(), which can be redefined to something else, very useful for testing.

Inheritance Diagram

Inheritance diagram for class _NodeCallback

Methods Summary

__init__
noNotify	Gets called if the _TopicTreeNode for this callback is dead
preNotify	‘Gets called just before our callback (self.objRef) is called

Class API

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class _NodeCallback

Encapsulate a weak reference to a method of a _TopicTreeNode in such a way that the method can be called, if the node is still alive, but the callback does not keep the node alive. Also, define two methods, preNotify() and noNotify(), which can be redefined to something else, very useful for testing.

Methods

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__init__(self, obj)

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noNotify(self)

Gets called if the _TopicTreeNode for this callback is dead

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preNotify(self, dead)

‘Gets called just before our callback (self.objRef) is called