##// END OF EJS Templates
update payload source...
update payload source should be simple key, not Python (or worse, IPython) specific long key. I could have sworn I did this long ago, but apparently the source key was only updated in display_data, not execute_reply.

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logtopics.rst
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MinRK
zmq kernels now started via newapp
r3970 =======================
Log Topic Specification
=======================
we use pyzmq to broadcast log events over a PUB socket. Engines, Controllers, etc. can all
broadcast. SUB sockets can be used to view the logs, and ZMQ topics are used to help
select out what to follow.
the PUBHandler object that emits the logs can ascribe topics to log messages. The order is:
<root_topic>.<loglevel>.<subtopic>[.<etc>]
root_topic is specified as an attribute