Spring Conponent scan in Equinox OSGI container

[ddewaele]

Hi,

I'm deploying an existing WAR file as a WAB that uses Spring component scanning in Equinox (Apache Aries Equinox test harness)

I noticed that Spring supports "auto-detecting" the equinox container in the PathMatchingResourcePatternResolver by loading the org.eclipse.core.runtime.FileLocator class.

However, Spring is unable to load the class (ClassNotFoundException) resulting in no specific bundle: or bundleresource: handling during the component scan. (The WAB runs fine when specifying the beans in the context manually and disabling the component scanning).

What do I need to change to my WAB in terms of import packages, dynamic imports or other configuration in order to make this work ?

I've already tried using dynamic imports, and importing the org.eclipse.core.runtime package, but the container responds with

The bundle could not be resolved. Reason: Missing Constraint: Import-Package: org.eclipse.core.runtime; version="[3.1.0,4.0.0)"

[ddewaele]

Fixed it by installing the org.eclipse.equinox.common-3.6.0.v20100503.jar in Equinox.

This can be done manually by executing the following command in the equinox console :

install file:///Users/ddewaele/.m2/repository/org/eclipse/equinox/org.eclipse.equinox.common/3.6.0.v20100503/org.eclipse.equinox.common-3.6.0.v20100503.jar

or by adding the following line in your Equinox config.ini

/Users/ddewaele/.m2/repository/org/eclipse/equinox/org.eclipse.equinox.common/3.6.0.v20100503/org.eclipse.equinox.common-3.6.0.v20100503.jar@start

If you check your bundles using the ss command, you should see it in the list

46	ACTIVE      org.eclipse.equinox.common_3.6.0.v20100503

This org.eclipse.equinox.common bundle exports the following package :

org.eclipse.core.internal.runtime;common=split

This is the package that needs to be imported by the bundle that does the component scanning.

So in the WAB we need to ensure that we import this package using the Import-Package in the MANIFEST.MF

org.eclipse.core.runtime;version="[3.1.0,4.0.0)";common=split

After that, when deploying the Spring WAB you should see this if you have debug logging enabled

DEBUG o.s.c.i.s.PathMatchingResourcePatternResolver - Found Equinox FileLocator for OSGi bundle URL resolution

If all goes well, it should now be able to translate the bundle resource

bundleresource://48.fwk426901684:1/com/ecs/sample/spring/

into a URL resource

URL [jar:file:/Users/ddewaele/equinox-test-harness/target/configuration/org.eclipse.osgi/bundles/48/1/bundlefile!/WEB-INF/classes/com/ecs/sample/spring/]