Ok. then how do I aviod using reactor.start() and reactor.stop() for getProcessOutut? Liming Christopher Armstrong wrote:

On Wed, 28 Jul 2004 16:41:49 +0800, Tsai Li Ming wrote:

...

The core class uses methods that uses getProcessOutput, reactor.run aad reactor.stop. However, the whole application gets shutdown because of the reactor.stop.

How do I avoid having my entire application getting stopped?

Don't call reactor.stop()...

"Doctor, doctor, it hurts when I do this!" ;-)

Christopher, We have the following class that is instantiated within the sever code that is using twistd to issue system calls. class System: result = None status = None cmd = '' def __init__(self, cmd, args=[]): self.cmd = cmd self.args = args def ok(self, result): self.result = result self.status = 0 reactor.stop() def err(self, err): self.result = err.getErrorMessage() self.status = 1 reactor.stop() def run(self): d = utils.getProcessOutput(self.cmd, self.args, os.environ) d.addCallback(self.ok) d.addErrback(self.err) reactor.run() def getResult(self): if self.status == None: self.status = 0 if self.result[-1:] == '\n': self.result = self.result[:-1] return self.status, self.result Since the reactor is already running, how do I actually use Deferred? Many thanks, Liming Christopher Armstrong wrote:

On Wed, 28 Jul 2004 17:07:36 +0800, Tsai Li Ming wrote:

...

Ok. then how do I aviod using reactor.start() and reactor.stop() for getProcessOutut?

Well, since you're using twistd, the reactor is already running, so you don't need to call reactor.run(). And you shouldn't be calling reactor.stop(), because you said you didn't want to stop the reactor.

So, just don't call them. But the fact that I need to say something so obvious makes me think I'm not grasping the whole picture. If my explanation so far is insufficient, can you show more code?

That makes sense. Don't we need to call the deferred object at some point in time? Like reactor.callLater? My apologies as I'm very new to Twisted. Liming Christopher Armstrong wrote:

On Wed, 28 Jul 2004 17:29:24 +0800, Tsai Li Ming wrote:

...

Christopher,

We have the following class that is instantiated within the sever code that is using twistd to issue system calls.

[snip code...]

...

Since the reactor is already running, how do I actually use Deferred?

It looks like you just need to take out those calls to reactor.stop() and reactor.run().

Liming, You may want to read the fine documentation howto sections... http://www.twistedmatrix.com/documents/current/howto/ I think if you put a little time into reading, all your questions will be answered. Anthony Tsai Li Ming wrote:

Christopher,

We have the following class that is instantiated within the sever code that is using twistd to issue system calls.

class System: result = None status = None cmd = ''

def __init__(self, cmd, args=[]): self.cmd = cmd self.args = args

def ok(self, result): self.result = result self.status = 0 reactor.stop()

def err(self, err): self.result = err.getErrorMessage() self.status = 1 reactor.stop()

def run(self): d = utils.getProcessOutput(self.cmd, self.args, os.environ) d.addCallback(self.ok) d.addErrback(self.err) reactor.run()

def getResult(self): if self.status == None: self.status = 0 if self.result[-1:] == '\n': self.result = self.result[:-1]

return self.status, self.result

Since the reactor is already running, how do I actually use Deferred?

Many thanks, Liming

Christopher Armstrong wrote:

...

On Wed, 28 Jul 2004 17:07:36 +0800, Tsai Li Ming wrote:

...

Ok. then how do I aviod using reactor.start() and reactor.stop() for getProcessOutut?

Well, since you're using twistd, the reactor is already running, so you don't need to call reactor.run(). And you shouldn't be calling reactor.stop(), because you said you didn't want to stop the reactor.

So, just don't call them. But the fact that I need to say something so obvious makes me think I'm not grasping the whole picture. If my explanation so far is insufficient, can you show more code?

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