[opencms-dev] Problems with caching dynamic pages

[Olli Aro]

Have you tried using cache directives. Something like;

public CmsCacheDirectives getCacheDirectives(CmsObject cms,String
templateFile,String elementName,Hashtable parameters, String
templateSelector)
{
	CmsCacheDirectives cd = new CmsCacheDirectives(false);

	return cd;
}

works with most of our dynamic stuff.

Regards,

Olli

> -----Original Message-----
> From: owner-opencms-dev at www.opencms.org
> [mailto:owner-opencms-dev at www.opencms.org]On Behalf Of
> hbusch at push-interactive.de
> Sent: 20 March 2003 14:50
> To: opencms-dev at www.opencms.org
> Subject: [opencms-dev] Problems with caching dynamic pages
>
>
> Hi!
>
> Apart from the fact that we still haven't resolved our database problems
> (see "[opencms-dev] openCMS too much connections problem"), we are
> encountering another problem: the element cache. There are more options to
> configure it in OpenCMS 5 by now, but we still have trouble.
>
> Let's assume I have a dynamic page that is generated by a class
> that extends
> CmsXmlTemplate, for example
>
> /myopencms/opencms/html/articles.html
>
> When I call this page, it gives me an overview of all articles
> available for
> viewing. Every article can be viewed completely by clicking a link that
> leads to the same page, just with a parameter added:
>
> /myopencms/opencms/html/articles.html?id=45
>
> This call should generate a page that contains the article with ID 45 in
> whole. With element cache disabled, this works. When I enable the
> cache and
> click on that link, the overview page is regenerated, just as if I hadn't
> appended a parameter. It is not possible to select a specific
> article. Apart
> from a nice screen-redraw in the browser, the page is just the same it was
> before.
>
> I tried overriding the methods that should control caching
>
> isCacheable()
> isProxyPrivateCacheable()
> isProxyPublicCacheable()
>
> so that they all return "false". Funny thing is, they only get called when
> the element cache is disabled, the system just ignores them when the cache
> is activated. If they do not control the element cache in detail,
> then what
> is the purpose of these methods?
>
> I could deactivate the cache, but a the system massively loses performance
> and this tradeoff isn't acceptable.
>
> How can I use caching *and* have my pages displayed correctly?
>
> We are using OpenCMS RC2on TomCat 4.1.18 running under linux.
>
> Any help is appreciated!
>
> With best regards,
> Hendrik Busch
>
>
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