ZeroRPC and UI loop

[Sébastien]

Hello,

I'm trying to develop a kind of basic simulator software and I would like to be able to interact

with it using IPC and RPC.

So my script (for now it's just a text user interface) have an infinite loop.

I would like to know what is the best way to include ZeroRPC into my script because there is

2 infinite loops : one for UI (run method of DrillSimulator) and one for ZeroRPC server (run method of zerorpc.Server).

I have nearly no experience with multithreading, gevent, greenlet... but I hope you can help.

server is in "drill_sim.py" file

client is "drill_remote_client.py"

Kind regards

Sébastien

[Sébastien]

Sorry I forget to add that I tried

thread.start_new_thread(start_server, (endpoint, resolve))

before running UI loop but I get

    raise NotImplementedError('gevent is only usable from a single thread')

NotImplementedError: gevent is only usable from a single thread

I also tried using

from concurrent.futures import ThreadPoolExecutor

but I couldn't find a way to make my simple script working correctly

Any idea?

[Andreu Correa Casablanca]

Hello,

El martes, 1 de julio de 2014 22:11:54 UTC+2, Sébastien escribió:

Sorry I forget to add that I tried

thread.start_new_thread(start_server, (endpoint, resolve))

before running UI loop but I get

    raise NotImplementedError('gevent is only usable from a single thread')

NotImplementedError: gevent is only usable from a single thread

ZeroRPC uses Gevent in it's internals. Gevent uses Greenlets, which are an alternative to classic threads.
Greenlets are a form of cooperative scheduling threading, while classic threads are preemptive scheduling
threading.

(Gevent has methods to "monkey  patch" all the relevant IO libraries in order
to yield the CPU when the greenlet has to wait for IO responses)

Maybe because this you're experiencing problems with thread pools.

 

[s.ce...@gmail.com]

Thanks

So what is possible to do if I want to have a thread for UI and an other thread waiting RPC ?

Is it possible to do it using ZeroRPC ?

Kind regards

Sébastien

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