Ahh, very true. There is a built-in GlobalCache service in Turbine (2.2, at
least) which may be useful to you (it supports expiration but not to disk,
etc). I guess it depends what you need it for.
Global caches can have some drawbacks when you want data tied to a
particular session...
If you decide to use the GlobalCache service, you might find these static
accessors handy:
-----------
package com.genix.property.utils;
import org.apache.turbine.services.TurbineServices;
import org.apache.turbine.services.cache.CachedObject;
import org.apache.turbine.services.cache.GlobalCacheService;
import org.apache.turbine.services.cache.ObjectExpiredException;
/**
* Static accessors to the turbine GlobalCacheService.
*
* @author Greg Kerdemelidis (greg at genixsystems dot com)
*/
public class CacheUtils
{
/**
* Get an object from the Turbine global cache service.
*
* @param key The key for the desired object.
* @return Object that was stuffed into the cache.
* @throws ObjectExpiredException when the Object has expired, or
does not exist.
* @throws InstantiationException when the GlobalCacheService cannot
be located.
*/
public static Object get(String key)
throws ObjectExpiredException, InstantiationException
{
/*
* Look for the item in the cache.
* If it doesn't exist or the item is stale,
* the cache will throw an exception.
*/
GlobalCacheService gs =
(GlobalCacheService)TurbineServices.getInstance().getService(
GlobalCacheService.SERVICE_NAME);
return gs.getObject(key).getContents();
}
/**
* Puts an object in the Turbine global cache.
*
* @param key The key for the data.
* @param o The data.
* @param duration How long before the data gets expired (in
milliseconds)
* @throws InstantiationException when the GlobalCacheService cannot
be located.
*/
public static void put(String key, Object o, long duration)
throws InstantiationException
{
GlobalCacheService gs =
(GlobalCacheService)TurbineServices.getInstance().getService(GlobalCacheServ
ice.SERVICE_NAME);
gs.addObject(key,new CachedObject(o,duration));
}
}
-----------
> -----Original Message-----
> From: Nathaniel Reed [mailto:[EMAIL PROTECTED]
> Sent: Thursday, 30 October 2003 11:33 a.m.
> To: Turbine Users List; [EMAIL PROTECTED]
> Subject: Re: persisting objects in context across requests
>
> Hi, you might be interested in a technique we borrowed from a JavaWorld
> article:
>
> http://www.javaworld.com/javaworld/jw-06-1999/jw-06-cooltools.html
>
> It's a "cache" that can be used to conveniently store objects in-between
> HTTP requests. We easily extended this caching mechanism to write out
> the objects to disk when they expire, and to retrieve them from disk if
> they are not in the cache.
>
> Nate
>
> brian wrote:
>
> >Hello,
> >
> > Is there a way to save an object in the
> >(org.apache.velocity.context.Context) for longer than the current page
> >request, so it may retrieved from a different template page later?
> >
> >
> >
> >Brian A
> >
> >
> >
> >
> >
> >
>
>
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