This code looks to be based on a fairly old version of the framework...I
would guess version 3.x, which is prior to OSGi R4.3. You need to do
some updates to get this to work with the latest framework releases (now
version 4.4). Further, I think that OSGi R4.3 introduced some changes
that might make it possible to do this all outside the framework as a
bundle now, such as getting access to bundle revisions (i.e., modules)
and their class loaders.
In light of that, I'd say it would be better to consider donating this
as a stand-alone bundle to Apache OpenJPA...
-> richard
On 3/24/14, 06:28 , [email protected] wrote:
Hi all,
in our current project, we intensively use database access to store
information and share it between different (not clustered) instances.
As for the persistence layer, we use Apache OpenJPA in an Apache Felix
container (CQ5.5) with Apache Aries bundles installed. The setting up
faced out some problems related to the special ClassLoader scenario in
the OSGI environment. For a detailed related previous discussion have
a look at [1] and [2].
To sum up, the most frustrating problem was that the Classes loaded by
a special ModuleClassLoader could not be collected by the GC. So, the
static PCRegistry of OpenJPA referenced Classes, whose ClassLoader has
been closed/invalidated by Felix before and on any further access on
these Classes, caused NoClassDefFoundErrors.
To solve this issue we implemented a framework extension that
registers a BundleListener, cleaning up the PCRegistry every time a
Bundle is updated. This code we would like to contribute and any
comments are appreciated.
[1]
http://mail-archives.apache.org/mod_mbox/openjpa-dev/200707.mbox/%[email protected]%3E
[2] https://issues.apache.org/jira/browse/OPENJPA-285
Kind regards,
*Dirk Rudolph *
T-Systems Multimedia Solutions GmbH
Organisationseinheit CCS
Dirk Rudolph
Software-Entwicklung, OCJP
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+49 351 2820-5363 (Tel)
E-Mail:[email protected] <mailto:[email protected]>
Internet: http://www.t-systems-mms.com <http://www.t-systems-mms.de/>
T-Systems Multimedia Solutions GmbH
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