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From Jacek Laskowski <ja...@laskowski.net.pl>
Subject Re: Upgrading to XBean 3.7-SNAPSHOT for openejb osgi'fication
Date Mon, 12 Oct 2009 20:43:34 GMT
On Mon, Oct 12, 2009 at 7:07 PM, Jonathan Gallimore
<jonathan.gallimore@gmail.com> wrote:

> I'm pretty new to OSGi, but I'm keen to give it a go and help out if I can.
> I'll have a look over the JIRA issue and have a play about with Felix. If
> you're able to give me some pointers or something to specifically look at,
> that would be really helpful.

Glad it has spurred so much interest. It's been on my todo list for
almost 2-3 years and after having failed with Geronimo osgi'fication
(it seems to be way too large for such an OSGi newbie like me) I
finally come back to openejb which is way smaller and will hopefully
cause less troubles along the way.

The idea for openejb osgi'fication is to build a very small openejb
"kernel" (a mere openejb without anything :)) and everything else as
osgi services. You want stateless ejb container, install appropriate
bundle and start it. You want another openejb service, simply install
another service bundle and be done with it. That's the idea and I know
OSGI can do it, but am not sure *I* can do it. I don't really like
facing the jar hell with people have to worry about before starting
openejb. I would really like having a very small openejb with services
that can be disables/enabled in a more user-friendly way. Perhaps, I
underestimate what's already available in openejb, but since it's a
proprietary solution I don't think it gets much exposure. OSGi would
surely change it. If we could do that, we could probably "inject"
openejb into other OSGi-fied application servers without much hassle.
That's my dream of how openejb would look like in 4.0.

Without more ado, I begun playing with openejb3 and felix. Here are my
notes from today's experiments. I'll need to put it somewhere on the
website.

1/ Build the latest sources of xbean and openejb3 (mvn clean install will do)
2/ Download Apache Felix Configuration Admin Service (1.2.4) and save
it in bundle dir of the felix home dir.
3/ Start felix with conf/config.properties changed as follows:

org.osgi.framework.system.packages.extra=sun.misc

4/ Download http://wiki.ops4j.org/display/paxurl/Pax+URL (I worked
with the very old 0.3 release) and install/start it in felix
5/ Install the following jars (C:/.m2 is my local maven repo)

install file:/C:/.m2/org/apache/openejb/javaee-api/5.0-2/javaee-api-5.0-2.jar
install file:/C:/.m2/commons-logging/commons-logging/1.1.1/commons-logging-1.1.1.jar
install file:/C:/.m2/org/apache/openejb/openejb-jee/3.1.2-SNAPSHOT/openejb-jee-3.1.2-SNAPSHOT.jar
install wrap:file:/C:/.m2/wsdl4j/wsdl4j/1.6.1/wsdl4j-1.6.1.jar
install file:/C:/.m2/org/apache/xbean/xbean-naming/3.6-SNAPSHOT/xbean-naming-3.6-SNAPSHOT.jar
install file:/C:\oss\xbean\xbean-asm-shaded\target\xbean-asm-shaded-3.7-SNAPSHOT.jar
install file:/C:/.m2/org/apache/xbean/xbean-reflect/3.6-SNAPSHOT/xbean-reflect-3.6-SNAPSHOT.jar
install file:/C:\oss\xbean\xbean-finder-shaded\target\xbean-finder-shaded-3.7-SNAPSHOT.jar
install wrap:file:/C:/.m2/commons-cli/commons-cli/1.1/commons-cli-1.1.jar
install wrap:file:/C:/.m2/org/apache/geronimo/components/geronimo-connector/2.1/geronimo-connector-2.1.jar
install wrap:file:/C:/.m2/org/apache/geronimo/components/geronimo-transaction/2.1/geronimo-transaction-2.1.jar
install wrap:file:/C:/.m2/log4j/log4j/1.2.12/log4j-1.2.12.jar
install file:/C:\.m2\org\apache\openejb\openejb-api\3.1.2-SNAPSHOT\openejb-api-3.1.2-SNAPSHOT.jar
install file:/C:\.m2\org\apache\openejb\openejb-javaagent\3.1.2-SNAPSHOT\openejb-javaagent-3.1.2-SNAPSHOT.jar
install file:/C:/.m2/org/apache/openejb/openejb-core/3.1.2-SNAPSHOT/openejb-core-3.1.2-SNAPSHOT.jar

6/ Start them up (dunno if it's required and the last bundle -
openejb-core-3.1.2-SNAPSHOT.jar - is not sufficient)

All the bundles will be started fine which is the very beginning of
the openejb osgi'fication endeavour.

Jacek

-- 
Jacek Laskowski
Notatnik Projektanta Java EE - http://www.JacekLaskowski.pl

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