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https://issues.apache.org/jira/browse/CAMEL-4009?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13040762#comment-13040762
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Claus Ibsen commented on CAMEL-4009:
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Its the pluggable class resolvers
http://camel.apache.org/pluggable-class-resolvers.html
There is a jboss component for jboss5 and jboss6 at
http://code.google.com/a/apache-extras.org/p/camel-extra/?redir=1
And there is a camel-eclipse in the distro, but we can adjust it if really
needed
http://camel.apache.org/camel-eclipse.html
And people could potentially have extended the DefaultPackageScanClassResolver
and override the protected methods. So we just have to be a little careful.
So maybe take a 2nd look and try to be as compliant as possible. And polish the
code, so its not ugly. Then we can take a 2nd look.
> Fast @Converter loading in uber-jar
> -----------------------------------
>
> Key: CAMEL-4009
> URL: https://issues.apache.org/jira/browse/CAMEL-4009
> Project: Camel
> Issue Type: Improvement
> Components: camel-core
> Affects Versions: 2.7.0
> Reporter: Arkadi Shishlov
> Priority: Minor
> Labels: uber-jar
> Fix For: Future
>
> Attachments:
> apache-camel-r1127037-fast-TypeConverter-loading-in-uber-jar.diff
>
>
> Currently, the @Converter converters are loaded as follows
> {noformat}
> for package in TypeConverter meta-inf resource
> get package url from classloader
> if url is jar
> for entries in jar
> if entry match package
> check annotation
> {noformat}
> This is very inefficient approach when application is packaged into uber-jar
> as expensive iteration is performed multiple times over same jar.
> The attached patch changes loop into:
> {noformat}
> for package in TypeConverter meta-inf resource
> get package url from classloader
> create map url -> package names
> for url in distinct url
> if jar
> for entries in jar
> for package in packages
> if entry match package
> check annotation
> {noformat}
> With this patch I was able to cut startup time significantly from 15sec spent
> on @Converter-s load to 2sec on 45MB 29k entries uber-jar.
> I understand that the solution is not pretty but resolves a very practical
> problem. Let me know if you want me to polish it and update the javadoc.
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