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You can use this version of advertise where you can specify a connect and a disconnect callback. The callbacks get executed when a node subscribes and disconnects. You can just set a flag to start processing on connect and clear the flag when you stop processing.

You can use this version of advertise where you can specify a connect and a disconnect callback. The callbacks get executed when a node subscribes and disconnects. You can just set a flag to start processing on connect and clear the flag ~~when you~~ at disconnect to stop processing.

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