Remote Workers and Worker-Supervisor

[matyasmarkovics]

Remote Workers

I needed to create a pool of processes similar to the rpc module implementation in Erlang/OTP. - rpc (or rex) is a single process, I needed a pool of them. - This led me to extend poolboy, so that (local) workers could be started by a supervisor on a remote node.

For this to work these are the necessary steps:

1. Find the Pid of the Worker-Supervisor, even if remote, see find_pid/1
2. Start the workers via their Supervisor, even if Supervisor is remote, see new_worker/2
3. Monitor Worker-Supervisors, that were passed in and stop if they go DOWN
4. Monitor Remote node if Worker-Supervisor is remote and stop on nodedown
5. Stop Worker-Supervisor using gen_server:stop/1, so that it works remotely too. See: stop_supervisor/2