hi
In my django view ,I am creating a Thread subclass and adding it to a
ThreadManager TM to keep in a dictionary with name of thread as key
and instance as value.I have implemented TM as a singleton and
verified that only one instance of TM exists .However,when the view
calls tm.add_mythread() ,I find that the dictionary inside is empty
and the currently added instance becomes the only member.
I hope the code will make this clear.Please tell me what I did that
was wrong.I unit tested the TM using Dummy thread class and found that
the add works correctly .It is only when the view calls tm.add that
the above behaviour occurs
The view is like this,
def add_new_threadobj(request,page_title,template_name):
....
if request.method=='POST' and form.is_valid():
tobj=MyThread(some_post_data..)
tm=SingletonTM()
print 'tm=',tm # to check if same instance
tm.add_mythread(tobj)
tobj.start()
....
TM is a singleton
class TM(MySingleton):
def __init__(self):
self.threads={}
def add_thread(self,th):
if th.name in self.threads.keys():
print 'already in'
else:
print 'TM::before::threads:',self.threads
self.threads[th.name]=th
print 'TM::',self,'add_thread()::added=%s'%th.name
print 'TM::after::threads:',self.threads
def remove_thread(tname):
if tname in self.threads.keys():
del self.threads[tname]
When the view add_new_threadobj() is executed a couple of times,this
is the print output
adding for the first time,
tm= <mytm.TM object at 0x94a83ec>
TM::before::threads: {}
TM:: <mytm.TM object at 0x94a83ec> add_thread()::added=threadname1
TM::after::threads: {'threadname1':<MyThread(threadname1, initial
daemon)>}
adding another,
tm= <mytm.TM object at 0x94a83ec>
TM::before::threads: {}
TM::after::threads: {'threadname2':<MyThread(threadname2, initial
daemon)>}
This is what I couldn't make out, the dictionary should now contain 2
kv pairs.Since the tm instance is the same,the self.threads should
have printed the initially added thread's name and instance.
Please tell me if I am missing something
thanks
jim
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