maven-users mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From Curtis Rueden <ctrue...@wisc.edu>
Subject Re: move data from pom to class or class to pom
Date Wed, 16 Jul 2014 18:26:16 GMT
Hi Alejandro,

> I have a java class that has a constant in it (static final String).
> This string is a version number, e.g. "1.3.2-test".

Beware: the Java compiler often inlines constants, _including String
constants_, into classes that reference the value. So if you compile a
class "Foo" against version 1 of library "bar", then run with version 2 of
"bar" in the classpath, Foo will still see the constant value as 1 instead
of 2.

http://javasplitter.blogspot.com/2011/10/static-final-inline-trap.html

Much, much better to embed the version number into the JAR manifest, and/or
read it out of the Maven POM which the maven-jar-plugin embeds in the JAR
file.

Regards,
Curtis


On Wed, Jul 16, 2014 at 1:18 PM, <Alejandro.Endo@miranda.com> wrote:

> I have a java class that has a constant in it (static final String). This
> string is a version number, e.g. "1.3.2-test". I need to have this same
> value in a maven plugin configuration (the jaxb plugin) so I am wondering,
> is it better to keep the actual declaration in the code and somehow tell
> maven to take it from the code, or is it better to declare it in the pom
> and tell java to take the literal value to define the constant from the
> pom??
>
> I don't know how to do either so I would also like to hear some ideas. I
> am hoping i don't have to use resource filtering since having a source
> file as a resource is kind of problematic to me. It has to be ONLY that
> file that gets filtered, it would need to be in a non-standard location
> not src/main/java (maybe this is not true), and in general, it seems to me
> that treating source code as resource is counter-intuitive
>
> Has anyone else solved this issue with the DRY principle across behaviour
> and build system?
>
> The short background is that maven generates an XML schema via jaxb and
> this schema file is then made available at runtime via a service
>
> Thank you,
>
> Alejandro Endo | Software Designer/Concepteur de logiciels
>
>
> DISCLAIMER:
> Privileged and/or Confidential information may be contained in this
> message. If you are not the addressee of this message, you may not
> copy, use or deliver this message to anyone. In such event, you
> should destroy the message and kindly notify the sender by reply
> e-mail. It is understood that opinions or conclusions that do not
> relate to the official business of the company are neither given
> nor endorsed by the company.
> Thank You.
>

Mime
  • Unnamed multipart/alternative (inline, None, 0 bytes)
View raw message