Eclipse Community Forums: Virgo » Datasource not found in par deployment

Help

Home

Home » Eclipse Projects » Virgo » Datasource not found in par deployment(Virgo doesn't find my datasource)

Show: Today's Messages :: Show Polls :: Message Navigator

Datasource not found in par deployment [message #963003]

Mon, 29 October 2012 13:51

Erik Vande Velde

Messages: 82
Registered: September 2012

Member

In my deployment I created a dedicated bundle with the sole purpose of providing a datasource to the other bundles. One of my services/bundles uses that datasource in its application context to configure flyway. The application context file is attached to this post. I also attached the manifest.mf of the datasource bundle. Now, when I deploy the modules one by one everything works fine. But when I deploy a par with the same bundles in it, startup fails with this message:
com.googlecode.flyway.core.exception.FlywayException: Unable to obtain Jdbc connection from DataSource. What's the difference between both types of deployment?

Attachment: module-context.xml
(Size: 3.47KB, Downloaded 266 times)
Attachment: MANIFEST.MF
(Size: 0.37KB, Downloaded 237 times)

Report message to a moderator

Re: Datasource not found in par deployment [message #963138 is a reply to message #963003]

Mon, 29 October 2012 15:51

Mastah Naleh

Messages: 32
Registered: April 2012

Member

Might be the start order of each bundle ?
Just to check, try adding bundle-required on the one using the datasource bundle.

Might also be because while the bundle links each others and start trying to access DB connection, the datasource bundle is still establishing a connection.

Report message to a moderator

Re: Datasource not found in par deployment [message #964055 is a reply to message #963138]

Tue, 30 October 2012 08:17

Erik Vande Velde

Messages: 82
Registered: September 2012

Member

I googled around and didn't find any information about a 'bundle-required' keyword in a manifest file, do you have some documentation about its usage? In blog.osgi.org/2006/04/misconceptions-about-osgi-headers.html they explain that Bundle-Required doesn't influence the starting order of bundles, it is purely related to the resolving of dependencies. I found somewhere (forum.springsource.org/archive/index.php/t-61940.html) that there really is no startup order in a par, and it seems this is my problem. When bundle B is initializing (resolving the spring context files) it needs to be sure that A is running to get to the datasource, and I'm a bit afraid that there is no way to do it in Virgo.

Report message to a moderator

Re: Datasource not found in par deployment [message #964385 is a reply to message #964055]

Tue, 30 October 2012 13:25

Mastah Naleh

Messages: 32
Registered: April 2012

Member

Key word : Require-Bundle (see : http://wiki.osgi.org/wiki/Require-Bundle)

As for this to be the problem, actually, I don't believe this can be the source of your problems. It might be the second reason I gave you.

Report message to a moderator

Re: Datasource not found in par deployment [message #968332 is a reply to message #964385]

Fri, 02 November 2012 11:31

Glyn Normington

Messages: 1222
Registered: July 2009

Senior Member

In general, bundles should be able to cope with starting in arbitrary orders. There are various ways to achieve this. For instance, if bundle B consumed a service that bundle A published once it has finished initialising, then this would delay the Spring processing of bundle B appropriately. In fact, if bundle A is "Spring DM powered", it will publish its application context as a service which you could then use in bundle B simply to control the ordering.

If that approach isn't practical in this case, you might replace the PAR file with a scoped plan in order to control the start order of the content bundles. (You can also put a plan file inside a PAR, but that probably defeats the object as the plan file needs to refer to content in the repository rather than in the PAR file.) But you'd still be in a race, so it probably wouldn't help much.

Report message to a moderator

Previous Topic:	Package merge Problem
Next Topic:	Strange ClassNotFoundException

Goto Forum:

-=] Back to Top [=-

[ Syndicate this forum (XML) ] [

]

Current Time: Sat Apr 20 03:00:39 GMT 2024

.:: Contact :: Home ::.

Breadcrumbs

Sign up to our Newsletter