Re: Tool for detecting duplicate or conflicting classes across jars?

You should look at http://www.alphaworks.ibm.com/tech/nestedarchive

--Thanks,
Rohit Kelapure,
IBM Advisory Software Engineer


On 9/19/08, Uttormark, Tim <[email protected]> wrote:
>
>  I am looking for a tool which can help me find all classes which have
> multiple instances within the classpath.
>
>
>
> We are working on a large project which uses many open source frameworks.
> These frameworks are often implemented using overlapping sets of classes,
> e.g., we have several which use Apache commons HTTPClient or XML parsing
> classes.  We run into issues when we have multiple instances of classes of a
> given class in the classpath, especially when different versions of the
> class are included.
>
>
>
> I was hoping to find a tool that could analyze the contents of a set of
> jars (a java classpath, a set of directory paths, an ant fileset, the
> contents of an eclipse .classpath file, etc.) and then can list the fully
> qualified classname of all classes which occur more than once across the set
> of jars.  Ideally it would also be able to distinguish between classes of
> the same version which are repeated (duplicates) and cases where different
> versions of a class exist (conflicts).  I need it to inspect the contents of
> the jars, not just the jar names.
>
>
>
> I'm *not* looking for a tool which takes a classpath and a fully qualified
> classname and tells me in which jar the classloader would find the specified
> class.  I need to know all jars which contain the class, not just the first
> one.  The extcheck tool that comes with the JDK falls short too, as it does
> not compare a set of jars against themselves.
>
>
>
> Can anyone suggest a tool for this?
>
>
>
> Thanks,
>
>    -- Tim Uttormark
>
>       Principal Java Architect
>
>       Peopleclick
>
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