Custom Pipeline Caching

[Nils Kaiser <Ni...@gmx.net>]

Hello,

I have a complex pipeline which contains some self written components 
that generate and transform data in steps that cannot really be cached 
(dependent on external resources like the result of a request...).

What are the possibilities to implement a custom cachin scheme? Is there 
a way to define a step in the pipeline where caching is possible again 
(not just if all preceding components are cache-aware?).

Greetings,

Nils

Re: Custom Pipeline Caching - Using DelayedValidity?

[Nils Kaiser <Ni...@gmx.net>]

Well, after browsing around I wonder if I could use a delayed validity 
to implement this. It would not help me skipping the request step for 
the external content, but I could get a validity on the content and 
therefore skip the following transformers.

Am I right with the delayed validity beeing the solution here?

What is the best start point to implement delayed validity (sample 
component)?

Greetings,

Nils

> Hello,
>
> I have a complex pipeline which contains some self written components 
> that generate and transform data in steps that cannot really be cached 
> (dependent on external resources like the result of a request...).
>
> What are the possibilities to implement a custom cachin scheme? Is 
> there a way to define a step in the pipeline where caching is possible 
> again (not just if all preceding components are cache-aware?).
>
> Greetings,
>
> Nils

Re: Custom Pipeline Caching

[Nils Kaiser <Ni...@gmx.net>]

Hello Antonio,

I am not sure whether I can use the ExpiresCachingPipeline because I am 
implementing a kind of Proxy, so I have to make sure the content is up2date.

To explain it better, here a simple description of the pipeline:

1. Transformations (Preparation)
2. Fetching of external content
3. Transformation

After having fetched the content, I can decide if it changed or not, so 
I could skip step 3. I can't cache step 2 as I can never be sure that 
the external content did not change...

How can I implement a cache mechanism for my special case?

> Hi Nils,
>
> This thread may help you [1]
>
> Best Regards,
>
> Antonio Gallardo
>
> [1] http://marc.theaimsgroup.com/?t=114071517900001
>
> Nils Kaiser escribió:
>> Hello,
>>
>> I have a complex pipeline which contains some self written components 
>> that generate and transform data in steps that cannot really be 
>> cached (dependent on external resources like the result of a 
>> request...).
>>
>> What are the possibilities to implement a custom cachin scheme? Is 
>> there a way to define a step in the pipeline where caching is 
>> possible again (not just if all preceding components are cache-aware?).
>>
>> Greetings,
>>
>> Nils
>
>
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>

Re: Custom Pipeline Caching

[Antonio Gallardo <ag...@agssa.net>]

Hi Nils,

This thread may help you [1]

Best Regards,

Antonio Gallardo

[1] http://marc.theaimsgroup.com/?t=114071517900001

Nils Kaiser escribió:
> Hello,
>
> I have a complex pipeline which contains some self written components 
> that generate and transform data in steps that cannot really be cached 
> (dependent on external resources like the result of a request...).
>
> What are the possibilities to implement a custom cachin scheme? Is 
> there a way to define a step in the pipeline where caching is possible 
> again (not just if all preceding components are cache-aware?).
>
> Greetings,
>
> Nils


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