[infinispan-issues] [JBoss JIRA] Commented: (ISPN-1065) Use a better mechanism to parse config files

[Pete Muir (JIRA)]

    [ https://issues.jboss.org/browse/ISPN-1065?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12608382#comment-12608382 ] 

Pete Muir commented on ISPN-1065:
---------------------------------

I think we should strongly consider writing a Stax parser by hand. Previous experience tells me that this will result in a much more elegant architecture for our code (much simpler to keep up to date as a result) and will perform much better. I would also propose using a tool to read the docs from the schema and create a config doc, meaning all that needs keeping up to date is the schema and parser.

> Use a better mechanism to parse config files
> --------------------------------------------
>
>                 Key: ISPN-1065
>                 URL: https://issues.jboss.org/browse/ISPN-1065
>             Project: Infinispan
>          Issue Type: Enhancement
>          Components: Configuration
>    Affects Versions: 4.2.1.FINAL
>            Reporter: Manik Surtani
>            Assignee: Vladimir Blagojevic
>              Labels: jaxb
>             Fix For: 5.1.0.BETA1, 5.1.0.Final
>
>
> The current codebase heavily relies on JAXB to:
> 1.  Generate a XSD schema from a Configuration bean
> 2.  Generate a parser to use with an XML configuration
> This is known to be slow, and can significantly add to start up time:
> {quote}
> We did some analysis of our AS6 descriptor code which was using JAXB (800ms), compared to straight stax (10ms) 
> {quote}
> A possible solution could be to still use JAXB to generate the schema, but to also write a Maven plugin which would generate a STAX parser based on the XSD schema and Configuration bean at build time.  Infinispan would then use this STAX parser rather than a JAXB generated parser, which would be a lot faster.

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