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From "Simone Tripodi (JIRA)" <j...@apache.org>
Subject [jira] Updated: (COCOON3-9) Generalize the PipelineCache, so that it can be used as a general purpose cache for PipelineComponents as well.
Date Mon, 10 Nov 2008 09:38:44 GMT

     [ https://issues.apache.org/jira/browse/COCOON3-9?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Simone Tripodi updated COCOON3-9:
---------------------------------

    Attachment: InMemoryMRUCache.java

Hi Steven,

you and I both agree that we don't need a complex cache system implemented in the cocoon packages
- if users need more complex systems, they have to implement them  - but I noticed that thanks
to a small trick on java.util.LinkedHashMap we can provide a very simple implementation of
MRU cache, modifying a little your org.apache.cocoon.pipeline.caching.SimpleCache. 

The attached class shows you how to use the trick, I hope this helps.

I suggest you to rename the org.apache.cocoon.pipeline.caching.SimpleCache class in org.apache.cocoon.pipeline.caching.InMemoryMRUCache,
IMHO sounds more intuitive for users.

> Generalize the PipelineCache, so that it can be used as a general purpose cache for PipelineComponents
as well.
> ---------------------------------------------------------------------------------------------------------------
>
>                 Key: COCOON3-9
>                 URL: https://issues.apache.org/jira/browse/COCOON3-9
>             Project: Cocoon 3
>          Issue Type: Improvement
>          Components: cocoon-pipeline
>    Affects Versions: 3.0.0-alpha-1
>            Reporter: Steven Dolg
>            Assignee: Cocoon Developers Team
>             Fix For: 3.0.0-alpha-2
>
>         Attachments: cache-fixed.patch, cache.patch, InMemoryMRUCache.java
>
>
> Currently the PipelineCache is very specific for caching the complete results of a pipeline
execution.
> COCOON3-6 is the first issue requiring a caching mechanism at the PipelineComponent level.
> With only some minor modifications the PipelineCache can be used for those requirements.

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