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POTwisted hangs while daemonize
 

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    <p>I'm beginner in twisted world, so first I'm trying to get my working django project configured under twisted,currently its working well on django testing server or apache via mod_wsgi. </p> <p>I followed this <a href="https://stackoverflow.com/questions/4875326/twisted-creating-a-threadpool-and-then-daemonizing-leads-to-uninformative-hangs">link</a> and <a href="http://www.clemesha.org/blog/realtime-web-apps-python-django-orbited-twisted" rel="nofollow noreferrer">this too</a> to configure the setup, based on that I have a server.py file given bellow </p> <p>So in-order to integrate django app with twisted I used the following code,</p> <pre><code>import sys import os from twisted.application import internet, service from twisted.web import server, resource, wsgi, static from twisted.python import threadpool from twisted.internet import reactor from django.conf import settings import twresource # This file hold implementation of "Class Root". class ThreadPoolService(service.Service): def __init__(self, pool): self.pool = pool def startService(self): service.Service.startService(self) self.pool.start() def stopService(self): service.Service.stopService(self) self.pool.stop() class Root(resource.Resource): def __init__(self, wsgi_resource): resource.Resource.__init__(self) self.wsgi_resource = wsgi_resource def getChild(self, path, request): path0 = request.prepath.pop(0) request.postpath.insert(0, path0) return self.wsgi_resource PORT = 8080 # Environment setup for your Django project files: #insert it to first so our project will get first priority. sys.path.insert(0,"django_project") sys.path.insert(0,".") os.environ['DJANGO_SETTINGS_MODULE'] = 'django_project.settings' from django.core.handlers.wsgi import WSGIHandler def wsgi_resource(): pool = threadpool.ThreadPool() pool.start() # Allow Ctrl-C to get you out cleanly: reactor.addSystemEventTrigger('after', 'shutdown', pool.stop) wsgi_resource = wsgi.WSGIResource(reactor, pool, WSGIHandler()) return wsgi_resource # Twisted Application Framework setup: application = service.Application('twisted-django') # WSGI container for Django, combine it with twisted.web.Resource: # XXX this is the only 'ugly' part: see the 'getChild' method in twresource.Root wsgi_root = wsgi_resource() root = Root(wsgi_root) #multi = service.MultiService() #pool = threadpool.ThreadPool() #tps = ThreadPoolService(pool) #tps.setServiceParent(multi) #resource = wsgi.WSGIResource(reactor, tps.pool, WSGIHandler()) #root = twresource.Root(resource) #Admin Site media files #staticrsrc = static.File(os.path.join(os.path.abspath("."), "/usr/haridas/eclipse_workplace/skgargpms/django/contrib/admin/media/")) #root.putChild("admin/media", staticrsrc) # Serve it up: main_site = server.Site(root) #internet.TCPServer(PORT, main_site).setServiceParent(multi) internet.TCPServer(PORT, main_site).setServiceParent(application) #EOF. </code></pre> <p>Using above code It worked well from command line using "twisted -ny server.py", but when we run it as daemon "twisted -y server.py" it will hang, but the app is listening to the port 8080. I can access it using telnet. </p> <p>I found some fixes for this hanging issue from stackoverflow itself. It helped me to use the code sections given below, which is commented in the above server.py file.</p> <pre><code>multi = service.MultiService() pool = threadpool.ThreadPool() tps = ThreadPoolService(pool) tps.setServiceParent(multi) resource = wsgi.WSGIResource(reactor, tps.pool, WSGIHandler()) root = twresource.Root(resource) </code></pre> <p>and :- </p> <pre><code>internet.TCPServer(PORT, main_site).setServiceParent(multi) </code></pre> <p>instead of using the:-</p> <pre><code>wsgi_root = wsgi_resource() root = Root(wsgi_root) </code></pre> <p>and :- </p> <pre><code>internet.TCPServer(PORT, main_site).setServiceParent(application) </code></pre> <p>The modified method also didn't helped me to avoid the hanging issue.Is any body out there who successfully run the django apps under twisted daemon mode?.</p> <p>I maid any mistakes while combining these codes?, Currently I'm only started to learn the twisted architectures in detail. Please help me to solve this problem</p> <p>I'm looking for the Twisted Application configuration (TAC) file, which integrate django app with twisted and run with out any problem in the daemon mode also.</p> <p>Thanks and Regards,</p> <p>Haridas N.</p>
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