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ROS2 publisher callback on subscription match

ros2

asked 2020-05-08 10:10:31 -0500

ananya.muddu
13 ●4 ●5 ●8

Hi,

Is there a mechanism (existing or planned) in ROS2 that allows a publisher to register a callback that gets called on successful match with a subscription?

Such a mechanism exists in FastRTPS called PublisherListener.

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Comments

Not a good answer, but you can use the get number of subscribers call to check the number of subscribers and do something when it increments. Polling is a poor answer to this question but its a potential workaround for now.