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From: Michael Gentry <mgentry@masslight.net>
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Subject: Re: Version API
Message-Id: <04ADED15-843E-433E-8A41-EC4861BD0078@masslight.net>
Date: Wed, 29 Jul 2015 06:56:31 -0400
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To: "user@cayenne.apache.org" <user@cayenne.apache.org>

Maybe we should add a Cayenne.getVersion() method?


> On Jul 27, 2015, at 10:41 AM, Mike Kienenberger <mkienenb@gmail.com> wrote=
:
>=20
> Our jar MANIFEST file also contains:
>=20
> Bundle-Version: 4.0.0.M2
>=20
> But shouldn't we also be supplying this information as
>=20
> Implementation-Version: 4.0.0.M2
>=20
> so it's in a standardized place?
>=20
> I'd guess that's a simple maven build change -- I know how to do it
> under ant, but not under maven.
>=20
>=20
> Once we do that, then we can use the standard java libraries to
> provide the information:
>=20
>        Object object =3D new CayenneRuntimeException();
>        Package objPackage =3D object.getClass().getPackage();
>        System.out.println("Implementation Version: " +
> objPackage.getImplementationVersion());
>=20
> produces
>=20
> Implementation Version: 4.0.0.M2
>=20
> when I add an Implementation-Version: line to the MANIFEST in
> cayenne-server-4.0.M2.jar
>=20
> =3D=3D=3D=3D=3D
>   Manifest-Version: 1.0
> + Implementation-Version: 4.0.0.M2
>   Export-Package: org.apache.cayenne;uses:=3D"org.apache.cayenne.reflect,o=

> =3D=3D=3D=3D=3D
>=20
>> On Mon, Jul 27, 2015 at 9:57 AM, Andrus Adamchik <andrus@objectstyle.org>=
 wrote:
>>=20
>>> On Jul 27, 2015, at 4:21 PM, Joe Baldwin <jfbaldwin@earthlink.net> wrote=
:
>>>=20
>>> 1. My goal is to display the version of cayenne server jar I have added t=
o the project with Cayenne 4.0.
>>=20
>> As it happens, Project.CURRENT_PROJECT_VERSION (or its 4.0 alternative) i=
s not the same as the version of cayenne server jar. It denotes the version o=
f the XML mapping format, which does not align with the .jar version.
>>=20
>> If you need the version of the jar, here is another approach. While you a=
re not using Maven, Cayenne is assembled with Maven, so each Cayenne jar has=
 some extra metadata that you get for free. Namely there's a "pom.properties=
" file that you can read and get the version:
>>=20
>> Properties props =3D new Properties();
>> String path =3D "META-INF/maven/org.apache.cayenne/cayenne-server/pom.pro=
perties";
>> try(InputStream in : ObjectContext.class.getClassLoader().getResourceAsSt=
ream(path)) {
>>   props.load(in);
>> }
>>=20
>> String version =3D props.getProperty("version");
>>=20
>> Andrus
>>=20
>>=20