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Posted to user@aries.apache.org by Hendy Irawan <he...@soluvas.com> on 2012/10/20 09:08:41 UTC
Cannot create and publish beans with Java5 generics in Aries Blueprint
Hi Aries developers,
This Blueprint :
<bean id="xmiSiteCatalogSupplier"
class="org.soluvas.commons.XmiObjectLoader<org.soluvas.web.site.SiteCatalog>">
<argument value="org.soluvas.web.site.SitePackage" />
<argument value="id.co.bippo.common.PersonRef" />
<argument value="bippo.SiteCatalog.xmi" />
</bean>
<service ref="xmiSiteCatalogSupplier"
interface="com.google.common.base.Supplier<org.soluvas.web.site.SiteCatalog>"/>
Gives this error:
2012-10-20 13:59:28,275 | WARN | ce5/karaf/deploy | fileinstall
| ? ? | 6 -
org.apache.felix.fileinstall - 3.2.6 | Error while starting bundle:
blueprint:file:/home/ceefour/git/bippo-commerce5/karaf/deploy/berbatik_dev_app.xml
org.osgi.framework.BundleException: Unresolved constraint in bundle
berbatik_dev_app.xml [2110]: Unable to resolve 2110.4: missing requirement
[2110.4] osgi.wiring.package; (osgi.wiring.package=id.co.bippo.app) [caused
by: Unable to resolve 2425.2: missing requirement [2425.2]
osgi.wiring.package;
(&(osgi.wiring.package=id.co.bippo.common)(version>=5.0.0)(!(version>=6.0.0)))
[caused by: Unable to resolve 2415.13: missing requirement [2415.13]
osgi.wiring.package;
(osgi.wiring.package=com.google.common.base.Supplier<org.soluvas.web.site)]]
at
org.apache.felix.framework.Felix.resolveBundleRevision(Felix.java:3826)[org.apache.felix.framework-4.0.3.jar:]
at
org.apache.felix.framework.Felix.startBundle(Felix.java:1868)[org.apache.felix.framework-4.0.3.jar:]
at
org.apache.felix.framework.BundleImpl.start(BundleImpl.java:944)[org.apache.felix.framework-4.0.3.jar:]
at
org.apache.felix.fileinstall.internal.DirectoryWatcher.startBundle(DirectoryWatcher.java:1247)[6:org.apache.felix.fileinstall:3.2.6]
at
org.apache.felix.fileinstall.internal.DirectoryWatcher.startBundles(DirectoryWatcher.java:1219)[6:org.apache.felix.fileinstall:3.2.6]
at
org.apache.felix.fileinstall.internal.DirectoryWatcher.startAllBundles(DirectoryWatcher.java:1208)[6:org.apache.felix.fileinstall:3.2.6]
at
org.apache.felix.fileinstall.internal.DirectoryWatcher.process(DirectoryWatcher.java:503)[6:org.apache.felix.fileinstall:3.2.6]
at
org.apache.felix.fileinstall.internal.DirectoryWatcher.run(DirectoryWatcher.java:291)[6:org.apache.felix.fileinstall:3.2.6]
My use case is:
- The needed service is a Supplier<SiteCatalog>, it supplies SiteCatalog
objects. The supplier can dynamically return a SiteCatalog, and the
SiteCatalog must not be proxied.
- A Supplier implementation can use generics,
e.g. org.soluvas.commons.XmiObjectLoader<T> in this case
What I'd like to do is register the equivalent of:
new XmiObjectLoader<SiteCatalog>( ............ );
However Blueprint seems to not allow creating objects with generics, and
also not publish services with generics.
A workaround is to create a wrapper supplier decorator class for each data,
i.e.:
new SiteCatalogSupplier( <original supplier here> )
but this is ugly when there are lots of data classes.
Any suggestions? Is this a bug ?
--
Hendy Irawan - on Twitter <http://twitter.com/hendybippo> - on
LinkedIn<http://id.linkedin.com/in/hendyirawan>
Web Developer | Bippo Indonesia <http://www.bippo.co.id/> | Akselerator
Bisnis | Bandung
Re: Cannot create and publish beans with Java5 generics in Aries Blueprint
Posted by Hendy Irawan <he...@soluvas.com>.
Thank you John,
That's that we're currently using, though it feels like a hack, since we're
no longer using objectClass as it's "intended", and we're now always using
"filter" all the time even for the simplest cases. It's also not OSGi
standard, but our own convention, which limits portability.
This is not much different than publishing/consuming a "java.util.List"
service.
Another issue is type parameters may be nested. For example I may need a
Supplier of a list of SiteCatalogs, now this will be
Supplier<List<SiteCatalog>>, or perhaps more portably Supplier<? extends
List<? extends SiteCatalog>>. How do this with Blueprint?
Hendy
On Mon, Oct 22, 2012 at 11:30 PM, John W Ross <jw...@us.ibm.com> wrote:
> Even if that syntax were supported, I'm not sure I'd see the point since
> generics are a compile time only construct. What would you have blueprint
> do with the generic data at runtime in terms of instantiating and
> registering the service?
>
> If the main issue is you need to insure the injected Supplier service
> reference returns SiteCatalog objects, you could have the Supplier
> registered with a service property, then have the consumer look only for a
> Supplier with that property and value.
>
> <bean id="xmiSiteCatalogSupplier"
> class="org.soluvas.commons.XmiObjectLoader">
> <!-- I'm assuming the following three arguments are sufficient for letting
> the XmiObjectLoader know which type to return. -->
>
> <argument value="org.soluvas.web.site.SitePackage" />
> <argument value="id.co.bippo.common.PersonRef" />
> <argument value="bippo.SiteCatalog.xmi" />
> </bean>
> <service ref="xmiSiteCatalogSupplier"
> interface="com.google.common.base.Supplier">
> <service-properties>
> <entry key="supplied" value="org.soluvas.web.site.SiteCatalog"/>
> </service-properties>
> </service>
>
> <reference interface="com.google.common.base.Supplier" filter="(supplied=
> org.soluvas.web.site.SiteCatalog)"/>
>
> John
>
> >
> > Cannot create and publish beans with Java5 generics in Aries Blueprint
>
> >
> > Hi Aries developers,
> >
> > This Blueprint :
> >
> > <bean id="xmiSiteCatalogSupplier"
> >
> class="org.soluvas.commons.XmiObjectLoader<org.soluvas.web.site.SiteCatalog>">
> > <argument value="org.soluvas.web.site.SitePackage" />
> > <argument value="id.co.bippo.common.PersonRef" />
> > <argument value="bippo.SiteCatalog.xmi" />
> > </bean>
> > <service ref="xmiSiteCatalogSupplier"
> >
> interface="com.google.common.base.Supplier<org.soluvas.web.site.SiteCatalog>"/>
> >
> > Gives this error:
> >
> > 2012-10-20 13:59:28,275 | WARN | ce5/karaf/deploy | fileinstall
> > | ? ? | 6 -
> > org.apache.felix.fileinstall - 3.2.6 | Error while starting bundle:
> > blueprint:file:/home/ceefour/git/bippo-commerce5/karaf/deploy/
> > berbatik_dev_app.xml
> > org.osgi.framework.BundleException: Unresolved constraint in bundle
> > berbatik_dev_app.xml [2110]: Unable to resolve 2110.4: missing
> > requirement [2110.4] osgi.wiring.package;
> > (osgi.wiring.package=id.co.bippo.app) [caused by: Unable to resolve
> > 2425.2: missing requirement [2425.2] osgi.wiring.package; (&
> > (osgi.wiring.package=id.co.bippo.common)(version>=5.0.0)(!
> > (version>=6.0.0))) [caused by: Unable to resolve 2415.13: missing
> > requirement [2415.13] osgi.wiring.package;
> >
> (osgi.wiring.package=com.google.common.base.Supplier<org.soluvas.web.site)]]
> > at org.apache.felix.framework.Felix.resolveBundleRevision
> > (Felix.java:3826)[org.apache.felix.framework-4.0.3.jar:]
> > at org.apache.felix.framework.Felix.startBundle(Felix.java:
> > 1868)[org.apache.felix.framework-4.0.3.jar:]
> > at org.apache.felix.framework.BundleImpl.start
> > (BundleImpl.java:944)[org.apache.felix.framework-4.0.3.jar:]
> > at
> > org.apache.felix.fileinstall.internal.DirectoryWatcher.startBundle
> > (DirectoryWatcher.java:1247)[6:org.apache.felix.fileinstall:3.2.6]
> > at
> > org.apache.felix.fileinstall.internal.DirectoryWatcher.startBundles
> > (DirectoryWatcher.java:1219)[6:org.apache.felix.fileinstall:3.2.6]
> > at
> > org.apache.felix.fileinstall.internal.DirectoryWatcher.startAllBundles
> > (DirectoryWatcher.java:1208)[6:org.apache.felix.fileinstall:3.2.6]
> > at
> > org.apache.felix.fileinstall.internal.DirectoryWatcher.process
> > (DirectoryWatcher.java:503)[6:org.apache.felix.fileinstall:3.2.6]
> > at
> > org.apache.felix.fileinstall.internal.DirectoryWatcher.run
> > (DirectoryWatcher.java:291)[6:org.apache.felix.fileinstall:3.2.6]
> >
> > My use case is:
> > - The needed service is a Supplier<SiteCatalog>, it supplies
> > SiteCatalog objects. The supplier can dynamically return a
> > SiteCatalog, and the SiteCatalog must not be proxied.
> > - A Supplier implementation can use generics,
> > e.g. org.soluvas.commons.XmiObjectLoader<T> in this case
> >
> > What I'd like to do is register the equivalent of:
> >
> > new XmiObjectLoader<SiteCatalog>( ............ );
> >
> > However Blueprint seems to not allow creating objects with generics,
> > and also not publish services with generics.
> >
> > A workaround is to create a wrapper supplier decorator class for
> > each data, i.e.:
> >
> > new SiteCatalogSupplier( <original supplier here> )
> >
> > but this is ugly when there are lots of data classes.
> >
> > Any suggestions? Is this a bug ?
> >
> > --
> > Hendy Irawan - on Twitter - on LinkedIn
> > Web Developer | Bippo Indonesia | Akselerator Bisnis | Bandung
>
>
--
Hendy Irawan - on Twitter <http://twitter.com/hendybippo> - on
LinkedIn<http://id.linkedin.com/in/hendyirawan>
Web Developer | Bippo Indonesia <http://www.bippo.co.id/> | Akselerator
Bisnis | Bandung
Re: Cannot create and publish beans with Java5 generics in Aries Blueprint
Posted by John W Ross <jw...@us.ibm.com>.
Even if that syntax were supported, I'm not sure I'd see the point since
generics are a compile time only construct. What would you have blueprint
do with the generic data at runtime in terms of instantiating and
registering the service?
If the main issue is you need to insure the injected Supplier service
reference returns SiteCatalog objects, you could have the Supplier
registered with a service property, then have the consumer look only for a
Supplier with that property and value.
<bean id="xmiSiteCatalogSupplier"
class="org.soluvas.commons.XmiObjectLoader">
<!-- I'm assuming the following three arguments are sufficient for letting
the XmiObjectLoader know which type to return. -->
<argument value="org.soluvas.web.site.SitePackage" />
<argument value="id.co.bippo.common.PersonRef" />
<argument value="bippo.SiteCatalog.xmi" />
</bean>
<service ref="xmiSiteCatalogSupplier"
interface="com.google.common.base.Supplier">
<service-properties>
<entry key="supplied" value="
org.soluvas.web.site.SiteCatalog"/>
</service-properties>
</service>
<reference interface="com.google.common.base.Supplier" filter="(supplied=
org.soluvas.web.site.SiteCatalog)"/>
John
>
> Cannot create and publish beans with Java5 generics in Aries Blueprint
>
> Hi Aries developers,
>
> This Blueprint :
>
> <bean id="xmiSiteCatalogSupplier"
>
class="org.soluvas.commons.XmiObjectLoader<org.soluvas.web.site.SiteCatalog>">
> <argument value="org.soluvas.web.site.SitePackage" />
> <argument value="id.co.bippo.common.PersonRef" />
> <argument value="bippo.SiteCatalog.xmi" />
> </bean>
> <service ref="xmiSiteCatalogSupplier"
>
interface="com.google.common.base.Supplier<org.soluvas.web.site.SiteCatalog>"/>
>
> Gives this error:
>
> 2012-10-20 13:59:28,275 | WARN | ce5/karaf/deploy | fileinstall
> | ? ? | 6 -
> org.apache.felix.fileinstall - 3.2.6 | Error while starting bundle:
> blueprint:file:/home/ceefour/git/bippo-commerce5/karaf/deploy/
> berbatik_dev_app.xml
> org.osgi.framework.BundleException: Unresolved constraint in bundle
> berbatik_dev_app.xml [2110]: Unable to resolve 2110.4: missing
> requirement [2110.4] osgi.wiring.package;
> (osgi.wiring.package=id.co.bippo.app) [caused by: Unable to resolve
> 2425.2: missing requirement [2425.2] osgi.wiring.package; (&
> (osgi.wiring.package=id.co.bippo.common)(version>=5.0.0)(!
> (version>=6.0.0))) [caused by: Unable to resolve 2415.13: missing
> requirement [2415.13] osgi.wiring.package;
>
(osgi.wiring.package=com.google.common.base.Supplier<org.soluvas.web.site)]]
> at org.apache.felix.framework.Felix.resolveBundleRevision
> (Felix.java:3826)[org.apache.felix.framework-4.0.3.jar:]
> at org.apache.felix.framework.Felix.startBundle(Felix.java:
> 1868)[org.apache.felix.framework-4.0.3.jar:]
> at org.apache.felix.framework.BundleImpl.start
> (BundleImpl.java:944)[org.apache.felix.framework-4.0.3.jar:]
> at
> org.apache.felix.fileinstall.internal.DirectoryWatcher.startBundle
> (DirectoryWatcher.java:1247)[6:org.apache.felix.fileinstall:3.2.6]
> at
> org.apache.felix.fileinstall.internal.DirectoryWatcher.startBundles
> (DirectoryWatcher.java:1219)[6:org.apache.felix.fileinstall:3.2.6]
> at
> org.apache.felix.fileinstall.internal.DirectoryWatcher.startAllBundles
> (DirectoryWatcher.java:1208)[6:org.apache.felix.fileinstall:3.2.6]
> at
> org.apache.felix.fileinstall.internal.DirectoryWatcher.process
> (DirectoryWatcher.java:503)[6:org.apache.felix.fileinstall:3.2.6]
> at
> org.apache.felix.fileinstall.internal.DirectoryWatcher.run
> (DirectoryWatcher.java:291)[6:org.apache.felix.fileinstall:3.2.6]
>
> My use case is:
> - The needed service is a Supplier<SiteCatalog>, it supplies
> SiteCatalog objects. The supplier can dynamically return a
> SiteCatalog, and the SiteCatalog must not be proxied.
> - A Supplier implementation can use generics,
> e.g. org.soluvas.commons.XmiObjectLoader<T> in this case
>
> What I'd like to do is register the equivalent of:
>
> new XmiObjectLoader<SiteCatalog>( ............ );
>
> However Blueprint seems to not allow creating objects with generics,
> and also not publish services with generics.
>
> A workaround is to create a wrapper supplier decorator class for
> each data, i.e.:
>
> new SiteCatalogSupplier( <original supplier here> )
>
> but this is ugly when there are lots of data classes.
>
> Any suggestions? Is this a bug ?
>
> --
> Hendy Irawan - on Twitter - on LinkedIn
> Web Developer | Bippo Indonesia | Akselerator Bisnis | Bandung