deferred

twisted, unblock a threads.blockingCallFromThread when the reactor stops

it seems threads.blockingCallFromThread keeps blocking even when the reactor stops. is there any way to un-block it? the deferred that it is blocking on relies on an RPC coming from the other end, and that definitely won't come in with the reactor stopped. ...

twisted.protocols.ftp.FTPClient and Deferreds

Like most it's taking me a while to get used to using Deferreds but I'm slowly getting there. However, it's not clear to me how I can process a response and then call another FTP command using the processed response when using Twisted's FTP module. I'm using the the example FTP code as my jumping off point. I want to connect to a FTP se...

twisted: check whether a deferred has already been called

This is what I'm trying to accomplish. I'm making a remote call to a server for information, and I want to block to wait for the info. I created a function that returns a Deferred such that when the RPC comes in with the reply, the deferred is called. Then I have a function called from a thread that goes threads.blockingCallFromThread(re...

Use deferred to make an infinite call loop

Can we use deferred (http://twistedmatrix.com/documents/current/core/howto/defer.html) to make an infinite call loop in which a function adds itself to a deferred chain? I tried to do this, but it doesn't work: d = deferred.Deferred() first = True def loopPrinting(dump): ch = chr(random.randint(97, 122)) print ch global d, first ...

Making a python program wait until Twisted deferred returns a value

I have a program that fetches info from other pages and parses them using BeautifulSoup and Twisted's getPage. Later on in the program I print info that the deferred process creates. Currently my program tries to print it before the differed returns the info. How can I make it wait? def twisAmaz(contents): #This parses the page (amazon ...

twisted: no exception trace if error from a callback

Consider the following code: df = defer.Deferred() def hah(_): raise ValueError("4") df.addCallback(hah) df.callback(hah) When it runs, that exception just gets eaten. Where did it go? How can I get it to be displayed? Doing defer.setDebugging(True) has no effect. I ask this because other times, I get a printout saying "Unhandled err...

GWT Deferred Binding for loding only required classes in catch

Dear All, We have product, who's front end is in GWT. As it contains many classes (Around 150 menus, you can imagine now) When user access this first time, it takes time to load. (If bandwidth is low then this increases) next time on wards it remains in catch, we dont have to worry about bandwidth. Can i reduce this first ti...

python twisted : retrieve a deferred's execution time

I would like to know how long a Deferred takes to execute, from the time the first callback is fired to the final result. Any ideas on how to do that, possibly in a non-invasive manner ( meaning no modification on any of the callback functions in order to track the execution time ) ? ...