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POExecute Twisted reactor.run() in a thread?
 

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  1. POExecute Twisted reactor.run() in a thread?
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    <p>I'm trying to make a Python library to use the Ubutu One API from Objective-C. Here is my source code: <a href="https://github.com/JoseExposito/U1-Finder-Plugin/blob/master/U1FinderLib/U1FinderLib.py" rel="noreferrer">https://github.com/JoseExposito/U1-Finder-Plugin/blob/master/U1FinderLib/U1FinderLib.py</a></p> <p>I need to make many calls to the API, for this reason I need to have my reactor running once instead of run it and stop it, like in the example of the Ubuntu One documentation: <a href="https://one.ubuntu.com/developer/files/store_files/syncdaemontool" rel="noreferrer">https://one.ubuntu.com/developer/files/store_files/syncdaemontool</a></p> <p>Because it is not possible to run twice the reactor... And I need to execute reactor.run() in a thread because I can not block the application that uses that library!</p> <p>It is possible to do that? I'm not able to run the reactor in a thread and call the Ubuntu One API synchronous.</p> <p>EDIT:</p> <p>I'm using this simple source code to test the idea:</p> <pre><code>#!/usr/bin/env python import objc import thread import os import time from twisted.internet import reactor, defer from ubuntuone.platform.tools import (SyncDaemonTool, is_already_running) from threading import Thread NSObject = objc.lookUpClass('NSObject') ## # Variable to get the result of the calls to the Sync Daemon. # The result is a JSON string stored in returned_value[0]. returned_value = [''] ## # Objective-C facade to the methods of the U1FinderLib. class U1FinderLib(NSObject): def init(self): self = super(U1FinderLib, self).init() self.sync_daemon_tool = SyncDaemonTool(None) Thread(target=reactor.run, args=(False,)).start() return self @objc.typedSelector('@@:') def volumeList(self): print "Begin volumeList" reactor.callLater(0, run_command, "volume_list", [], self.sync_daemon_tool) print "End volumeList" return returned_value[0] ## # Auxiliar functions to call to the sync daemon. @defer.inlineCallbacks def run_command(action, params, sync_daemon_tool): print "run_command" running = yield is_already_running() print "After is_already_running" try: if not running: returned_value[0] = '{ type:"error" reason:"Sync Daemon is not running" }' else: print "Before run_action" yield run_action(action, params, sync_daemon_tool) print "After run_action" except Exception, e: returned_value[0] = '{ type:"error" reason:"Exception: %s" }' % e @defer.inlineCallbacks def run_action(action, params, sync_daemon_tool): if action == "volume_list": d = sync_daemon_tool.get_folders() returned_value[0] = yield d.addCallback(lambda r: volume_list(r)) # Volume List def volume_list(folders): volumes_json = '{ type:"volume_list" volumes: { \n\t{ volume:"' + os.path.expanduser('~/Ubuntu One') + '" subscribed:"YES" }' for folder in folders: volumes_json += ',\n\t{ volume:"' + folder['path'] + '" subscribed:"' + ('YES' if bool(folder['subscribed']) else 'NO') + '" }' volumes_json += '\n} }' return volumes_json if __name__ == '__main__': py = U1FinderLib.alloc().init() print py.volumeList() print "EXIT" </code></pre> <p>And this is the output of the program:</p> <pre><code>Begin volumeList End volumeList EXIT </code></pre> <p>The problem is that the "run_command" function is never called</p>
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    1. USuser1204395
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    1. COYou could always register your functions as deferands, fire them through the reactor#
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      1. USJakob Bowyer
    2. COCan you explain it a little bit please? I'm a Python totally noob (in fact this is my first code in Python)
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      1. USuser1204395
    3. COFirst time programming in Python and directly jumping on to Twisted? I wish you all the luck... :)
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      1. USSanjay T. Sharma
 

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