[jboss-as7-dev] A simple timed cache?

[Jason T. Greene]

On 9/6/11 9:58 AM, Sanne Grinovero wrote:
> On 6 September 2011 16:28, Anil Saldhana<Anil.Saldhana at redhat.com>  wrote:
>> On 09/06/2011 08:38 AM, Jason T. Greene wrote:
>>>>>>>   2) copy infinispan's LIRS map
>>>>>
>>>>>   Infinispan's LIRS is not easy to extract out, you'll have to make
>>>>>   significant changes
>>> Last I looked it was a small handful of classes. Not a big deal. I think
>>> Jesper used it in ironjacamar. The security subsytem directly linked
>>> against it. That' something I have been meaning to open a JIRA on, since
>>> this is technically not a public API it's likely better to copy.
>>>
>> For the Auth Cache in the Security subsystem, we have 2 use cases:
>> a) Timed Cache.
>> b) Timed Cache with cluster distribution.
>>
>> The former is default usage while the latter is something the user
>> configures.
>>
>> For the cluster aware cache, we brought in direct dependence on
>> Infinispan cache.
>>
>> Jason, we support your insistence on  a smaller infinispan dependence.
>
> +1 from another Infinispan consumer&&  developer.
>
> If you could explain why you don't want to depend on it I'll call
> attention on this at the Infinispan meeting, to be held in two weeks,
> and see if we can do something in useful time.
> If the main reason is bootup time in standalone mode, right now the
> testsuite performs a dozen tests per second, to give a rough idea of
> where we stand now, but we can work on it more if that's the main
> factor.
> I don't think we ever spent any effort to optimize the boot time, so
> there might be some low hanging fruits.

When we were working on 7, code which used infinispan (even without the 
slow jaxb XML parsing) had to eat close to 500 ms initialization time. I 
didn't look too deeply into it, but infinispan does reflective analysis 
and injection which isnt free.

Basically at the end of the day, when all we need is a map, there is no 
reason to expect any initialization time that is not comparable to any 
other map implemementation (CHM etc).

-- 
Jason T. Greene
JBoss AS Lead / EAP Platform Architect
JBoss, a division of Red Hat