The default install:. Obviously, default will get the appropriate install depending on the platform. Under Linux will be the first to use epollreactor, if the kernel does not support, you can only use pollreactor. Mac platform pollreactor, windows use selectreactor. Each install is almost achieved, where we extract the install selectreactor to look at.
In installReactor added twisted. To be used later reactor, this will be introduced into a single embodiment. IReactorFDSet interfaces mainly acquisition descriptor, add, or delete method of operation. These methods will be able to see the name to know the meaning, so I did not add a comment. The example in reactor. The whole logic is simple, and the server-side as normal, creates a socket, bind, listen. Except that socket descriptor added to the read set of reactor.
So if the connection with the client over the words, reactor will be monitored, then the event handler is triggered. Then the client if the connection request, it will call the set tcp. Port doRead method of reading. When a client has data arrives, it will call doRead transport method for data read. Connection is Server transport instance of the class of the parent class, which implements the method doRead.
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Experience, study notes, there is a chance of business experience, and for everyone to carefully organize a python to combat zero-based item of information,. Python day to you on the latest technology, prospects, learning small details that need to comment on this point, a simple process, from creation to listen to events, to the receiving client data thus concluded.
This article describes the event manager in the reactor Detailed usage of Python's Twisted framework, Twisted is an asynchronous Python development framework a high popularity, a friend in need can under reference bedding in a lot of practice, it seems that we are always in a similar way to use asynchronous programming: Monitor events events executes the corresponding callback function callback is completed possible new events added to the listen queue back to 1, listen for events so we will this asynchronous mode is called the Reactor pattern, such as Run Loop concept in iOS Development, in fact, very similar to the Reactor loop, Run Loop main thread monitor screen UI event, once the UI event handling code corresponding to the event is executed, can also generate an event to the main thread execution by other means GCD.
There are several conclusions about the reactor the following: Twisted's reactor only be started by calling reactor. Nov 10, Oct 29, Oct 23, Oct 10, Sep 14, Aug 28, Aug 19, Aug 16, Jul 6, May 18, Apr 11, Apr 4, Mar 15, Nov 29, Aug 4, May 24, May 19, Apr 13, Jan 30, Sep 18, Sep 17, May 12, Nov 8, Jun 30, Apr 3, Dec 26, Sep 1, Jun 5, Nov 17, Nov 30, Jul 4, Mar 4, Nov 26, Jan 6, Jan 11, May 30, This just means that Twisted goes through the list of things that it has to do and does them.
In reality of course it handles exceptions around each event, and the concrete implementation of the reactor often just calls straight into an event handler rather than creating an Event -like object to record the work that needs to be done first, but conceptually this is just what happens.
I hope this expanded explanation helps you get your head around it. If you'd like to learn more about Twisted by working on it, I'd encourage you to join the mailing list , hop on to the IRC channel, twisted to talk about applications or twisted-dev to work on Twisted itself, both on Freenode. The program yields control and go to sleep on wait for events. I suppose the most interesting part here is event.
Event is: on external demand receiving network packet, click on a keyboard, timer, different program call the program receives control in some other thread or in special routine. Stack Overflow for Teams — Collaborate and share knowledge with a private group. Create a free Team What is Teams?
Collectives on Stack Overflow. Learn more. How does Python's Twisted Reactor work? Ask Question. Asked 5 years, 11 months ago. Active 5 years, 11 months ago. Viewed 11k times. Add a comment. Active Oldest Votes. One line at a time: while True: It's not actually while True ; it's more like while not loop. Finally, for event in events: event.
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