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I'm trying to shut down all Nodes except 1 within a C++ program. Therefore I want to count the number of ROS_Nodes and kill n-2 nodes. ( My_Node and roscore shall still exist). Or is there any other way to do so?
Thanks for your Help
You could use a combination of the Master API and Slave API to do what you want (first retrieve all registered nodes, iterate over them, compare their names and request the ones you don't want/need any longer to shutdown).
See #q271776 (among others) for a question that deals with something similar.
Therefore I want to count the number of ROS_Nodes and kill n-2 nodes. ( My_Node and roscore shall still exist).
Note: I would recommend to do this by name, not "by number". That seems very brittle.
Also: roscore is not a node.
Asked: 2018-04-16 03:14:00 -0500
Seen: 250 times
Last updated: Apr 16 '18
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To avoid an xy-problem, it might be good if you could clarify why you want to do this. It might not be necessary.
I need it, because I have to restart Gazebo with another enviroment. But the Linux-Computer is remote controlled to this. Therefore I have to shut down every ROS_Node, except the one which handles the remote.
If you can manage the state of "your node", then would deployment using Docker perhaps be an option? Reusing
roscoreinstances is not necessarily always very stable (left over parameters, etc).