Re: Local thread variable (attempting to create a connection pool)

I'm not sure it's really a singleton that I need because I need a different value for each thread. I'm using threading.local for it, so far I haven't run into any issues, but I'd like to hear the opinion of a more experienced django developer.

I save in cache the possible IPs of the backend system and I open connections to it when needed inside a threading.local subclass. I use an object from such class in order to retrieve a connection.

The threading.local subclass is instantiated in a module variable, I could use the singleton class you pointed out as well. But I don't see the need for it in my case.

On Friday, December 14, 2012 5:38:59 PM UTC-2, Chris Cogdon wrote:

What you essentially want is a common pattern called a "singleton": something that there is only one of, like "None" and "Elipsis". You can do something workable, but ugly, using module-level variables, but there are known patterns for creating singletons

Here's some starters:

http://stackoverflow.com/questions/42558/python-and-the-singleton-pattern

On Friday, December 14, 2012 9:33:19 AM UTC-8, Rafael Almeida wrote:

Hello,

I have a django application which needs to connect to some backend services. Problem is I don't want to create a new connection everytime, but to use a connection pool. One connection per thread would be fine, but I don't know how to use django in order to achive that. I'd like to perhaps save those connections on cache subsystem, but I don't know how to create one key per thread, per worker.

Thank you for your help,

Rafael

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