expensive_func is the target function you want to cache its result
get_cache to get a cache for a specific namespace
sample code from pylonshq.com
# Add to existing imports
from pylons import cache
# Under the controller class
def some_action(self, day):
# hypothetical action that uses a 'day' variable as its key
def expensive_function():
# do something that takes a lot of cpu/resources
return expensive_call()
# Get a cache for a specific namespace, you can name it whatever
# you want, in this case its 'my_function'
mycache = cache.get_cache('my_function', type="memory")
# Get the value, this will create the cache copy the first time
# and any time it expires (in seconds, so 3600 = one hour)
c.myvalue = mycache.get_value(key=day, createfunc=expensive_function,
expiretime=3600)
return render('/some/template.myt')
On Mon, May 3, 2010 at 10:46 PM, Mario Moura <[email protected]> wrote:
> Hi
>
> Thanks in advance
>
> Whats mean:
>
> expensive_func ? and
>
> mycache = cache.get_cache('my_function') ==> my_function ?
>
> I tried in lib/app_globals.py
> self.expensive_func = "myDinamicDir" ??? or a link to a new Function?
>
> I read about config and app_globals
>
> "Because the app_globals object is persistent across requests, it can
> be modified by any thread. This means it is possible that a value
> attached to app_globals might be different at the start of a request
> than at the end if another thread has changed its value in between.
> ... if you aren’t used to working in multithreaded environments"
>
> How I want multithreaded environment Should I use Template Context c
> Global?
>
> "...The c global is reset on each request so that you don’t need to
> worry about a controller still having old values set from a previous
> request..."
>
> My target isnt cache itself but store my session where I want. Beaker
> control Sessions dir with data_dir too and I need custom to fit my
> needs.
>
> So I read
> /usr/lib/python2.6/site-packages/Beaker-1.5.3-py2.6.egg/beaker/container.py
>
> class FileNamespaceManager(OpenResourceNamespaceManager):
>
> So I could just custom this class but my fraid is "multithreaded"
> trouble so What Pylons Team recommend?
>
> I know isnt recommend custom a class inside a package but is a easy
> solution. I not very familiar with all python concepts. Could someone
> recommend if I need apply some Design Partner to resolve this issue?
>
> Best Regards
>
> Mario
> macm
>
>
>
>
> 2010/4/30 Eryx Lee <[email protected]>:
> > You can use "CacheManager" to create your own cache in your specified
> > directory dynamically. But do you actually need to create different
> caches
> > in your controllers? Or just using separate cache region by "get_cache"
> but
> > save to the same cache directory?
> >
> > Sample:
> > from beaker.cache import CacheManager
> > from beaker.util import parse_cache_config_options
> >
> > cache_opts = {
> > 'cache.type': 'file',
> > 'cache.data_dir': '/tmp/cache/data',
> > 'cache.lock_dir': '/tmp/cache/lock'
> > }
> >
> > cache = CacheManager(**parse_cache_config_options(cache_opts))
> > mycache = cache.get_cache('my_function')
> > myvalue = mycache.get_value(key="test", createfunc=expensive_function,
> > expiretime=60)
> >
> >
> >
> > On Sat, May 1, 2010 at 3:41 AM, Gael Pasgrimaud <[email protected]> wrote:
> >>
> >> On Fri, Apr 30, 2010 at 9:27 PM, macm <[email protected]> wrote:
> >> > Hi Folks
> >> >
> >> > I am newbie in pylons and python
> >> >
> >> > How can I custom my cache_dir dynamically in controller?
> >> >
> >> > So I dont want use development.ini
> >> > cache_dir = %(here)s/data
> >> >
> >> > I want add in my controller something like that
> >> >
> >> > config['cache_dir'] = MyDynamicallyDir
> >> >
> >> > But after read a lot about wsgi and midlleware I see this:
> >> > config['pylons.app_globals'].mako_lookup = TemplateLookup( ....
> >> >
> >> > ... and I still lost!
> >> >
> >> > I am using mako and at this moment no sql.
> >> >
> >> > So is it possible custom config['cache_dir'] in controller?
> >> > How can I change config['cache_dir'] in controller?
> >> > Should I create a mako template base? and <%inherit something ?/>
> >> >
> >>
> >> I guess you need to instantiate your own Cache
> >> http://beaker.groovie.org/modules/cache.html#beaker.cache.Cache
> >>
> >> self.cache = Cache(**kw)
> >>
> >> But maybe you can use cache_region instead
> >>
> >> > Regards
> >> >
> >> > macm
> >> > Mario
> >> >
> >> > --
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> >> >
> >> >
> >>
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