Marcel Offermans wrote:
Hi Alex,
The class cast exception indicates there are two different copies on the
class path. Since you did not post exactly how you started up, I'd have
to guess what's going on...
...but, I would like to ask you why you are extending Felix like this?
Basically I want to do a mvn osgi:run to install and run the bundle in
Felix. Combined with a archetype I can generate test bundles used to
test other bundles. This way I can integration test (in situ) the bundle.
Perhaps I may make an abstract unit test as well that does something
similar.
I
see at least two other approaches that I would favor:
1) Keeping this as a bundle. What you're doing is essentially (in OSGi
speak) installing a (simple) management agent. This agent is then
responsible for installing and starting bundles.
Right but I want maven to run tests and not to have to do it manually.
2) Keeping it as a "bundle" that loads as part of the system bundle.
Felix has a nice mechanism to provide zero or more extensions to the
system bundle by means of providing classes that implement
BundleActivator. Package your stuff like that and my guess is it runs
without any modifications (compared to running it as 1) which is
something you've already tried.
Furthermore, if you're concerned about having to specify all kinds of
startup options to fire up this management bundle, it's fairly easy to
create a wrapper startup class that sets all options (as system
properties) and subsequently starts Felix (which will then pick those up
and auto start your "management agent" bundle that will then start the
rest).
Yeah this is exactly what I want to do.
I'm guessing you're doing this to create some kind of automated test
framework?
Exactly!
I would very much prefer option 1) because that is the one that is the
easiest to "port" to other frameworks.
So tests will not run with the build though. I want the tests to run as
part of the build process as they do with regular test cases for things
I unit test without a container.
But, this is a lot of guesswork and brainstorming, so I might not
understand the problem you're trying to solve at all. :)
I think you got what I am trying to do. In a couple sentences:
I want to unit test bundles. I want those unit tests to run the same
way normal unit tests of simple methods and classes are run as perceived
by the user when issuing a 'mvn install' for example.
Greetings, Marcel
Thanks much!
Alex
On Aug 13, 2006, at 7:01 , Alex Karasulu wrote:
I've been trying to figure out a way to tell Felix how to
programmatically install and start bundles. My goal is to build a
simple mojo for our maven 2 plugin that will allow us to install and
start a bundle produced by a project using Felix. This idea is to use
a command like so:
mvn osgi:run
This will trigger the mojo to startup Felix, install and start the
target bundle generated by the project including any dependent bundles.
My problem is in navigating the Felix API. I would like to avoid
using the configuration file all together and just use the API. What
I've done is extended Felix and exposed the protected installBundle
method. Next I called it to get a handle on a Bundle and called
start() on it. Here's how that code looks ...
in = new FileInputStream(
"/home/akarasulu/test-bundle-1.0.0-SNAPSHOT.jar" );
b = instance.installBundle(
"file:///home/akarasulu/test-bundle-1.0.0-SNAPSHOT.jar", in );
b.start();
Instance is the instance of the Felix subclass. When I do this I get
a ClassCastException on the BundleActivator in this simple bundle
which just prints Hello World. The bundle starts just fine in Felix
running in standard command line mode. I'm just wondering what I'm
doing wrong. Any hints or suggestions on what I'm botching up would
be great.
Here's the stack trace that I get:
Exception in thread "main" org.osgi.framework.BundleException:
Activator start error.
at org.apache.felix.framework.Felix._startBundle(Felix.java:1261)
at org.apache.felix.framework.Felix.startBundle(Felix.java:1149)
at
org.apache.felix.framework.BundleImpl.start(BundleImpl.java:326)
at FelixTestDriver.main(FelixTestDriver.java:65)
Caused by: java.lang.ClassCastException: test.Activator
at
org.apache.felix.framework.Felix.createBundleActivator(Felix.java:2702)
at org.apache.felix.framework.Felix._startBundle(Felix.java:1203)
... 3 more
Thanks,
Alex
