Hello everyone,
I am using Ant, as well as Bnd, with the following Bnd directives in order
to allow my bundles to import APIs using a version range (because I have
some multi-version requirements).
-versionpolicy "[${version;==;$...@}},${version;+;$...@}})"*
-> This clause allows a Using Service bundle to Import a Service API using a
versionrange of the form *[x.y,x+1)*. This means accept any version starting
with a minimum number up to the next breaking API chnage identified by a
new major version number.
-versionpolicy-impl "[${version;==;$...@}},${version;=+;$...@}})"*
-> This clause allows a Service Providing bundle to import the API it
implements with the range of the form *[x.y,x.y+1)*. This means accept any
increment in the micro and qualifier parts. But as soon as the minor
version number changes, consider this an incompatibility.
Ok, now I have the following usecase:
- I'm using a third party library bundle, which exports the jaxb API
(javax.xml.bind) with version = 2.1.4
- I am using jdk1.6, and the javax.xml.bind is also exported by the
framework in the system package, with version = 1.6.0 (I'm using jdk 1.6)
- Bundle B1 is compiled with the jaxb bundle it it's classpath. So, Bnd
generates automatically (thanks to the versionpolicy directive) a nice
Import-Package header, with javax.xml.bind;version="[2.1,3)"
- But bundle B2 wants to be wired* with the jdk javax.xml.bind,* *not
with the 2.1.4 jaxb.*
My question is: what is the best way to ensure that B2 will be wired with
the proper jaxb jdk version ?
-> For now, I accommodate with setting the following directive in the bnd
file of B2:
Import-Package: javax.xml.bind.*; version="[1.6,1.6]", *
But I don't think that it's a nice thing to hard code the jdk version in my
B2 bundle bnd directive's file, because I will to update my bnd file, when I
will switch to jdk 1.7 ...
I'm also not comfortable with importing jaxb with version = 1.6.0, because
1.6.0 is the jdk version, not a jaxb version.
Another option would consist in updating the felix system package and append
a "tag=JDK" in the exported system package list. And in B2, I could then
import jaxb like this:
Import-Package: javax.xml.bind.*; tag=JDK, *
This way is probably a little bit smarter that hard coding the 1.6 version,
but I then have to configure my felix fwk and add that specific "tag=JDK"
header ..
What do you think ?
thanks;
/pierre
