Hi Jan,
What if my goal is to remove from the cache a page w/a specific selector
though? For example, if I have:
/foo/bar.one.html
/foo/bar.two.html
...
I have a case where I actually only want to remove /foo/bar.two.html from
cache. If I understand what you are saying it sounds like I should not use the
UUID because that would remove all variants of the page. I wrote some code
that seems to work but it mostly ignores locale, parameters and is tied to a
specific cache implementation. Less than ideal but I couldn't find any more
general methods in Magnolia to help.
public static void flushByHandle(String uri) {
String localeString = null;
Map<String, String> params = new HashMap<String, String>();
String serverName = null;
if (MgnlContext.isWebContext()) {
localeString = MgnlContext.getWebContext().getLocale().toString();
serverName = MgnlContext.getWebContext().getRequest().getServerName();
}
DefaultCacheKey key = new DefaultCacheKey(uri, serverName, localeString,
params);
CacheModule cacheModule =
ModuleRegistry.Factory.getInstance().getModuleInstance(CacheModule.class);
CacheFactory factory = cacheModule.getCacheFactory();
Collection<CacheConfiguration> cacheConfigs =
cacheModule.getConfigurations().values();
for (CacheConfiguration config : cacheConfigs) {
final Cache cache = factory.getCache(config.getName());
cache.remove(key);
}
}
Tom
On Nov 1, 2010, at 3:12 PM, Jan Haderka wrote:
> I'd suggest you retrieve the page by path to find out its uuid and then
> remove it from cache using the methods for removing cache items by uuid.
>
> The reason is that there might be multiple variants of this page in the cache
> - with or w/o selectors, with different locales, with different parameters or
> headers, etc ... you get the picture. While you can possibly construct the
> key for the cache item from the url used to create such a cache entry, there
> are way too many other variants to make it reliable.
> I don't have the code in front of me right now, but since some recent version
> there are even commands you can call with the uuid to remove the cache
> entries, so you can run it from scheduled task or as part of the workflow.
>
> HTH,
> Jan
>
> On Oct 29, 2010, at 3:39 PM, Thomas Duffey wrote:
>
>>
>> Hi Everyone,
>>
>> Is it possible to programmatically remove items from the Magnolia cache? In
>> particular, I would like to programmatically remove pages from cache when
>> certain things occur. I found some code about removing items from cache by
>> UUID but in some cases I will only know the page handle and it will include
>> a selector, e.g.,
>>
>> /foo/bar.one.html
>> /foo/bar.two.html
>> etc.
>>
>> Does Magnolia even cache URLs with selectors separately and is there a way
>> to remove just one of them from the cache if I know the handle?
--
Tom Duffey
[email protected]
414-915-3915
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