Stores a list of topic definition providers. When queried for a topic definition, queries each provider (registered via addProvider()) and returns the first complete definition provided, or (None,None).
The providers must follow the ITopicDefnProvider protocol.
Initialize self. See help(type(self)) for accurate signature. |
|
Add given provider IF not already added. |
|
Remove all providers added. |
|
Returns a pair (docstring, MDS) for the topic. The first item is |
|
Return how many providers added. |
|
Returns |
_MasterTopicDefnProvider
¶Stores a list of topic definition providers. When queried for a topic definition, queries each provider (registered via addProvider()) and returns the first complete definition provided, or (None,None).
The providers must follow the ITopicDefnProvider protocol.
__init__
(self, treeConfig)¶Initialize self. See help(type(self)) for accurate signature.
addProvider
(self, provider)¶Add given provider IF not already added.
clear
(self)¶Remove all providers added.
getDefn
(self, topicNameTuple)¶Returns a pair (docstring, MDS) for the topic. The first item is a string containing the topic’s “docstring”, i.e. a description string for the topic, or None if no docstring available for the topic. The second item is None or an instance of ArgSpecGiven specifying the required and optional message data for listeners of this topic.
getNumProviders
(self)¶Return how many providers added.
isDefined
(self, topicNameTuple)¶Returns True
only if a complete definition exists, ie topic
has a description and a complete message data specification (MDS).