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2013-08-05 05:29:57 -0500 | answered a question | How to get topic from a message For future viewer reference, the second line could also be written as: with or without the "callback" and "callback_args". I would say that this follows the ROS convention more closely than the previous answer, although it is excellent and also works. |
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2013-08-01 16:51:48 -0500 | commented answer | How to get topic from a message Ah, yes, beautiful! Thank you! |
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2013-08-01 12:00:04 -0500 | asked a question | How to get topic from a message I'm trying to write a custom bagging node for my ROS installation. The node's requirements are to only bag topics that are published on the local machine (my ROS installation runs on a 3-computer setup), to throttle the bagging rate based on system load and free disk space, and to only bag topics specific to the state of the robot. This means that subscriptions are being created and destroyed on-the-fly, and therein lies my problem. For creating and destroying the subscriptions, I have these 2 lines of code: The top line unsubscribes everything and the bottom one makes all new ones. As you can see, each subscription has a callback method of So, what's the easiest way of getting the message publisher's topic type? In addition, is there any easier way of doing what I've described? Thanks for your help! |