Hi Jörg,
>
nice article ;-)
There's one comment I do not understand though:
The main disadvantage of this approach is that you can only use the
Implementation and Specification parts of your MANIFEST.MF file which
might be enough in some situations but not in all.
The comment is related to the implementation in Java which allows only
to extract the implementation and specification part...via
this.getClass().getPackage()....
http://docs.oracle.com/javase/7/docs/api/java/lang/Package.html
So can't use that in a very simple way...
You can add all kind of entries to the manifest. You may even overwrite the
defaults. We use typically:
Of course you can so create an appropriate MANIFEST.MF file...
===================== %< ======================
<archive>
<manifest>
<addDefaultSpecificationEntries>true</addDefaultSpecificationEntries>
<addDefaultImplementationEntries>true</addDefaultImplementationEntries>
</manifest>
<manifestEntries>
<Specification-Version>${parsedVersion.majorVersion}.
${parsedVersion.minorVersion}</Specification-Version>
<X-Compile-Source>${java.version.source}</X-Compile-Source>
<X-Compile-Target>${java.version.target}</X-Compile-Target>
<X-Builder>Maven ${maven.version}</X-Builder>
<X-Build-Time>${maven.build.timestamp}</X-Build-Time>
<X-Build-Os>${os.name}</X-Build-Os>
</manifestEntries>
</archive>
===================== %< ======================
With the $parsedVersion and $maven.version variables provided by the build-
helper plugin.
But the above entries can't be read via methods which already exists
like getPackage()....
So you need to implement it your own...you have to take care about
classloading issue (classloaders in particular in larger apps etc.)...
so it get more and more complicated...lets talk about apps which
comprise of 150 jar files...
So the simplest Solution is to use the templating-maven-plugin which
solves many of those issues.
Kind regards
Karl-Heinz Marbaise
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