[m2/m2-book] MANIFEST.MF and Class-Path.

[Sean McNamara <ta...@yahoo.com>]

On page 45 of the new maven book, it states:

"The original contents of src/main/resources can be found starting at the base of the JAR and the application.properties file is there in the META-INF directory. You will also notice some other files there like META-INF/MANIFEST.MF, as well as a pom.xml and pom.properties file. These come standard with the creation of a JAR in Maven. You can create your own manifest if you choose, but Maven will generate one by default if you don't."

I'm in a situation where I need to specify entries in the Class-Path attribute in MANIFEST.MF.  Putting the manifest file in "src/main/resources/META-INF/" results in a manifest being generated by maven, and the one in resources being stored under WEB-INF/classes/META-INF.

Did I misunderstand this portion of the book?

Ideally, I would be able to accomplish what I'm after by specifying the "addClasspath" attribute for the WAR archiver, but doing this includes all jars with the default scope in the classpath which is not what I'm after.  Default scope items should be bundled inside the WEB-INF/lib folder of the war as normal, but there are a couple that are provided inside the application EAR and these are what I'd like to add to the manifest classpath.

Any pointers?



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Re: [m2/m2-book] MANIFEST.MF and Class-Path.

[Kenney Westerhof <ke...@apache.org>]

On Tue, 2 May 2006, Sean McNamara wrote:

> On page 45 of the new maven book, it states:
>
> "The original contents of src/main/resources can be found starting at the base of the JAR and the application.properties file is there in the META-INF directory. You will also notice some other files there like META-INF/MANIFEST.MF, as well as a pom.xml and pom.properties file. These come standard with the creation of a JAR in Maven. You can create your own manifest if you choose, but Maven will generate one by default if you don't."
>
> I'm in a situation where I need to specify entries in the Class-Path
> attribute in MANIFEST.MF.  Putting the manifest file in
> "src/main/resources/META-INF/" results in a manifest being generated by
> maven, and the one in resources being stored under
> WEB-INF/classes/META-INF.
>
> Did I misunderstand this portion of the book?

No, but war packaging is different. The normal contents of a JAR go in
WEB-INF/classes/ if packaging is a war. Normally compiled classes are put
in /, but not in the case of a war. So maybe the book was being to general
in this case.

>
> Ideally, I would be able to accomplish what I'm after by specifying the
> "addClasspath" attribute for the WAR archiver, but doing this includes
> all jars with the default scope in the classpath which is not what I'm
> after.  Default scope items should be bundled inside the WEB-INF/lib
> folder of the war as normal, but there are a couple that are provided
> inside the application EAR and these are what I'd like to add to the
> manifest classpath.

What do you mean by 'default scope'? addClasspath will add all
dependencies with scope compile/runtime. If you want other jars,
you'll have to wait a bit for a new Maven version as this is not
configurable yet.

Btw, it's not that bad to have too many jars in the manifest; only the
ones that exist will be used. On the other hand, usually all needed jars
for a WAR should be in WEB-INF/lib - in your case, the war only works when
it's deployed within an ear, and is no longer usable as a standalone
webapp (using remote or local interfaces). Also classloading for
enterprise modules differs per container, so it's not a given that this
classpath idea will even work properly.

-- Kenney

>
> Any pointers?
>
>
>
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--
Kenney Westerhof
http://www.neonics.com
GPG public key: http://www.gods.nl/~forge/kenneyw.key

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