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From bugzi...@apache.org
Subject DO NOT REPLY [Bug 52607] New: It is not well defined how "Dependencies on extensions" mechanism can be used in Tomcat
Date Sun, 05 Feb 2012 22:19:35 GMT
https://issues.apache.org/bugzilla/show_bug.cgi?id=52607

             Bug #: 52607
           Summary: It is not well defined how "Dependencies on
                    extensions" mechanism can be used in Tomcat
           Product: Tomcat 7
           Version: 7.0.25
          Platform: All
        OS/Version: All
            Status: NEW
          Severity: normal
          Priority: P2
         Component: Catalina
        AssignedTo: dev@tomcat.apache.org
        ReportedBy: violetagg@apache.org
    Classification: Unclassified


Hi,

As a result of the mail thread [1] I'm opening a bug.

In short it is not clear how exactly "Dependencies on extensions" mechanism can
be used.

I have two proposals:

1. Tomcat can continue to use in its implementation a separate property
("catalina.ext.dirs") that provides extensions' location. But its value should
be added by default to the Tomcat's classpath directories (e.g.
"shared.loader").
- Pros: Tomcat users will know that this property specifies the directory for
their extensions and only the files located there will be scanned during
ExtensionValidator.validateApplication invocation.
- Cons: Additional configuration that has to be maintained.

2. Tomcat can remove this separate property ("catalina.ext.dirs") and start
searching for such extensions in the Tomcat's classpath directories (e.g.
shared.loader).
- Pros: No additional configuration is needed. One can specify the shared
libraries and the extensions with one and the same property.
- Cons: During ExtensionValidator.validateApplication, it may appear that a lot
of files are scanned which might be not necessary.

I'm willing to provide a patch once we agree on the solution. My favourite is
the first proposal.

I'm looking forward to your comments.
Thanks in advance.

Regards,
Violeta Georgieva

[1] http://marc.info/?t=132827584600009&r=1&w=2

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