Mailman 3 April 2014 - Twisted

[Twisted-Python] Buildbot downtime
by Tom Prince 03 Mar '22

03 Mar '22

I am plannig to upgrade twisted's buildbot in the near future. In preperation for that, I am going to take down the production buildbot on Tuesday, June 26, around 1600 UTC[1]. During that time, the result of any builds done will be lost. Thus, I'd ask that people avoid committing to trunk during that time. I will send a reminder before I take down the buildbot both here, and on #twisted and #twisted-dev. Tom [1] http://timeanddate.com/worldclock/meetingtime.html?iso=20120626&p1=80&p2=22…

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[Twisted-Python] Twisted Python 0.7.0 Prerelease Testing
by Glyph Lefkowitz 05 Aug '21

05 Aug '21

hi there, folks: I'd really like to release 0.7.0 but I would like it to be at least a little bit tested before I do so. Could those of you with CVS trees check everything out and see if it performs as advertised? Deeper bugs than that will have to wait for the next release, but I'd at least like to know if it works for someone other than me. Thanks. ______ __ __ _____ _ _ | ____ | \_/ |_____] |_____| |_____| |_____ | | | | @ t w i s t e d m a t r i x . c o m http://www.twistedmatrix.com/~glyph/

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01 May '19

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[Twisted-Python] Better usage of Twisted on multi core processor
by Sumanth Puram 13 Mar '15

13 Mar '15

Hi all, I have a twisted TCP server to listens to client, processes requests, do mysql database operations if needed (using adbapi Connection pool) and return the result. Before deploying this in production, I want to know right way to configure the server. Since twisted is single threaded, how can I leverage multiple cores of my production machine (which has 6 cores and 16 GB RAM) ? One approach that I thought of was to start multiple instances of twisted server on different ports. This would help in using the other cores as well. What do you guys suggest ? Thanks -Sumanth

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[Twisted-Python] [ANN] txZMQ released
by Andrey Smirnov 21 Jul '14

21 Jul '14

Hi! I would like to announce txZMQ, ZeroMQ bindings for Twisted. txZMQ is based on pyzmq and requires recent ØMQ version (>=2.1). txZMQ uses ØMQ APIs to get file descriptor that is used to signal pending actions from ØMQ library IO thread running in separate thread. txZMQ should be usable with any Twisted reactor. ØMQ is: * The socket library that acts as a concurrency framework. * Carries messages across inproc, IPC, TCP, and multicast. * Connect N-to-N via fanout, pubsub, pipeline, request-reply. * Fast enough for clustered products and supercomputing. * Asynch I/O for scalable multicore message-passing apps. Bridging ØMQ and Twisted makes a nice match: fast simple messaging between Twisted instances solving complex problems :) Links: * PyPi: http://pypi.python.org/pypi/txZMQ/ * Source code: https://github.com/smira/pyzmq * pyzmq: http://pypi.python.org/pypi/pyzmq * ØMQ: http://www.zeromq.org/ -- Andrey Smirnov, Qik Web Team Lead

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[Twisted-Python] Distributing apilinks.py
by Adi Roiban 11 May '14

11 May '14

Hi, Right now apilinks.py is located in Twisted at docs/_extensions/apilinks.py, but a copy can also be found in pydoctor project. While reporting a bug for apilinks.py in Twisted I was ask to send the patch upstream in pydoctor [1] During the review of the patch in pydoctor, pydoctor's maintainer agreed that there should be a single copy of this file but don't know what's involved in achieving that. [2] Can someone involved in using apilinks.py in Twisted provide some feedback regarding distribution of apilinks.py file? Many thanks! [1] https://twistedmatrix.com/trac/ticket/6954 [2] https://code.launchpad.net/~adiroiban/pydoctor/1282458-apilinks-anchor/+mer… -- Adi Roiban

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[Twisted-Python] Log level using Twistd
by Juan Antonio Ibañez Santorum 04 May '14

04 May '14

Hello, I am trying to modify loglevel withou result. I configure my app logging inside the tac file as: logging.basicConfig(level=logging.ERROR, format="%(asctime)s --- %(name)s - %(levelname)s - %(message)s") logfile = DailyLogFile("gdumper.log", "/var/log") application.setComponent(ILogObserver, FileLogObserver(logfile).emit) logging.basicConfig call seems do not apply as I get both log.msg and log.err messages into the log. Is there any other way to set up log level? Regards

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[Twisted-Python] Some comments regarding #5190 - ``RFC 6125 ("Service Identity") implementation´´
by exarkun＠twistedmatrix.com 03 May '14

03 May '14

Hello, I've just noticed that the changeset for #5190 included some untested code. Specifically, there are no tests for the code which detects missing dependencies and emits warnings about them. I'd previously noticed that this code was broken but hadn't realized this was because it was untested. I don't think there's any disagreement whatsoever over Twisted's testing requirements. All code must have full line and branch coverage (as reported by the coverage.py tool). Developers, please write tests for all of your code (and please learn to do test-driven development - it will make this task easier, I promise). Reviewers, please don't accept proposed changes that include untested code. Thanks, Jean-Paul

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[Twisted-Python] adding endpoint plugins
by David Stainton 02 May '14

02 May '14

Greetings, I wrote a simple IStreamClientEndpointStringParser for using the SOCKS5ClientEndpoint with Tor: https://gist.github.com/david415/26a4ed59078d2e27376f I modified a txsocksx code example for testing the new endpoint descriptor: https://gist.github.com/david415/7c6040117319cc3b0230 ...but I am not sure how to "register" it such that calls to clientFromString can return this endpoint when the descriptor prefix matches. This doc: https://twistedmatrix.com/documents/13.2.0/api/twisted.internet.interfaces.… mentions placing the plugin in the twisted.plugins package... however this doc: http://twistedsphinx.funsize.net/projects/core/howto/plugin.html suggests that I can also set the PYTHONPATH to a directory: """if a directory which has been added to sys.path (typically by adding it to the PYTHONPATH environment variable) contains a directory named twisted/plugins/ , each .py file in that directory will be loaded as a source of plugins.""" I'm using twisted 13.2.0 in a virtualenv... and I've tried setting PYTHONPATH to a "twisted/plugins" directory no avail. I must be doing something wrong here but after scouring the docs and twisted source code... I'm just not sure. This effort is part of solving for Tahoe-LAFS trac ticket 517: "make tahoe Tor- and I2P-friendly" https://tahoe-lafs.org/trac/tahoe-lafs/ticket/517 Thanks to Glyph and JP's help I was able to write a foolscap client side patch to use twisted endpoints. See foolscap trac ticket 203: http://foolscap.lothar.com/trac/ticket/203#comment:36 str4d has already written the foolscap server side endpoint patch... Therefore it seems to me the next steps are to create parsers for endpoints we are interested in supporting... and get Tahoe-LAFS to register them so that serverFromString and clientFromString will return the expected endpoint objects. Cheers! David

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[Twisted-Python] pb objects unexpectedly change identity
by Daniel Sank 01 May '14

01 May '14

Dear twisted users, I think I have found some surprising behavior in perspective broker. I define a subclass of pb.RemoteCache which has a method managed by a descriptor. The descriptor keeps track of the instances it manages in a set. When the RemoteCache is first received by the client, it accesses the descriptor-ified method inside setCopyableState. At that time the RemoteCache's id is a certain value X. Then later when the RemoteCache is notified of a change by the server side Cacheable, it again accesses the descriptor-ified method, but at this time it's id is Y, and Y!=X. I attach to this post a simple working example which displays the behavior described above. To run, first run server.py and then run client.py. You will see a little bit of output, the most important part being === Client received RemoteCache: id=45952496 Asking server to update TD 45921680 (test.RemoteCache.add) accessed by <test.RemoteCache instance at 2BD2DC8>: id=45952456 RemoteCache id=45952496 === To understand the details of the output please see descriptor.py. The id of the RemoteCache is first reported as 45952496 when the client receives it. Then, when the descriptor is accessed, the id of the accessing instance is reported as 45952456, which is different. Then, when in the last line we print out the id of the RemoteCache we're back to 45952496. Is there some reason that a RemoteCache's id can change during its life time? -- Daniel Sank Department of Physics Broida Hall University of California Santa Barbara, CA 93117 (805)893-3899

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