[Twisted-Python] How to get at applications in a reactor?

[Chaz.]

Here is some code I use that uses the global() parm in manhole.

from twisted.cred import portal,checkers
from twisted.conch import manhole, manhole_ssh
from twisted.application import internet


def ManholeFactory(namespace,**passwords) :
    realm = manhole_ssh.TerminalRealm()
    def getManhole(_): return manhole.Manhole(namespace)
    realm.chainedProtocolFactory.protocolFactory = getManhole
    p = portal.Portal(realm)

p.registerChecker(checkers.InMemoryUsernamePasswordDatabaseDontUse(**passwords))
    f = manhole_ssh.ConchFactory(p)
    return f


class ManholeService(internet.TCPServer):
    def __init__(self,port,namespace,**passwords):
        internet.TCPServer.__init__(self,port,
			ManholeFactory(namespace,**passwords))

You invoke it like:

    # Maybe start the manhole debugging service
    ManholeSrv = ManholeService(manholePort,
				globals(),admin='acct')
    ManholeSrv.setServiceParent(srv)


This will allow me access to everything in my application.

Chaz


Jean-Paul Calderone wrote:
> On Wed, 21 Jun 2006 08:09:17 -0700, "David E. Konerding"
> <dekonerding at lbl.gov> wrote:
>> Hi folks,.
>>
>> I've set up a convenient telnet manhole into my application.  The
>> application runs a web site serving up Static files
>> and some Resources.  What I want to do is telnet into the manhole and
>> get access to the application object.
>> Unfortunately, the useful information is not bound to the local scope
>> of the telnet manhole, so
>> I have to "stash" the application object when it is instantiated in
>> some global place (such as sys._myapplication).
> 
> You can populate the local namespace of the manhole.
> 
> twisted.conch.manhole.Manhole takes a namespace argument to its __init__
> 
> twisted.manhole.telnet.ShellFactory has a namespace instance attribute
> which you can populate after creating one.
> 
> The reactor doesn't know anything about sites or applications, so it can't
> give you a list of them.  It could give you a list of file descriptors, but
> I don't think that would be very useful :)
> 
> The gc module is also fairly handy with manhole.  For example,
> gc.get_referrers(SomeClass) will give you every instance of the
> given class which exists in the process at that time (it will
> give you some other stuff too, like a module dictionary, but you
> can use isinstance() to filter out just the instances).
> 
> Jean-Paul
> 
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