En Tue, 19 Aug 2008 15:58:11 -0300, Nils Oliver Kröger <NO_Kroeger@gmx .de>
escribi�:
Singleton.getIn stance() is so "javaistic" ... :)
Actually there is no need for all of that; just define the RLock at the
global scope in a module.
Don't feel bad by using a "global" name - remember that a Python module
acts as a named singleton. Defining an object at module scope is
equivalent to defining an instance attribute in your Singleton class.
--
Gabriel Genellina
escribi�:
My approach what be to write one class for reading and writing to the
configuration and make that class thread-safe using the RLock.
>
Then you create one and only one instance of this class and let all your
threads use (not import) that one instance.
>
You could achieve that "one and only one" either by having a main
program which creates the instance and pass the reference to each thread
via its __init__ or you implement the Configuration class as a singleton
like this:
>
class Singleton(objec t): [...]
>Add your methods for accessing as instance methods to this class and get
the same instance of this class in each thread by calling
Singleton.getIn stance().
configuration and make that class thread-safe using the RLock.
>
Then you create one and only one instance of this class and let all your
threads use (not import) that one instance.
>
You could achieve that "one and only one" either by having a main
program which creates the instance and pass the reference to each thread
via its __init__ or you implement the Configuration class as a singleton
like this:
>
class Singleton(objec t): [...]
>Add your methods for accessing as instance methods to this class and get
the same instance of this class in each thread by calling
Singleton.getIn stance().
Actually there is no need for all of that; just define the RLock at the
global scope in a module.
Don't feel bad by using a "global" name - remember that a Python module
acts as a named singleton. Defining an object at module scope is
equivalent to defining an instance attribute in your Singleton class.
--
Gabriel Genellina