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Re: [equinox-dev] policy="dynamic" in Declarative Services.

>From equinox realization,I think no way to do this.

Because equinox use reference policy & cardinality & interface etc. to
decide the component satisfication condition,if component become
unsatisfied,then equinox ds will dispose the component instance,and if
component become satisfied,equinox ds will create the component
instance,so If you want to use service with cardinality="1..1",you
must accept when the bound service is go away,the component instance
be disposed.

2009/5/4 Sameera Jayasoma <sameera.madushan@xxxxxxxxx>:
> Hi  Kai,
>
> On Mon, May 4, 2009 at 11:55 AM, Toedter, Kai <kai.toedter@xxxxxxxxxxx>
> wrote:
>>
>> HI Sameera,
>>
>>
>>
>> I think Equinox’ behavior is correct here. If you have a mandatory service
>> reference that is not valid anymore, the referring component has to be
>> deactivated even if the policy is dynamic.
>
> I agree with your point.  Now say that the service is mandatory when the
> component is activated. Once the component is activated, the service is a
> optional one. That mean I don't want my component to be de-activated when
> the service is unregistered. How can I handle this situation with
> declarative services?
>
> Thanks
> Sameera
>>
>>
>>
>> >But my requirement is that the service should be registered before the
>> > component is activated.
>>
>> >in that case I have to put cardinality as "1..1" right?
>>
>> I guess your question is related to the lazy activation of components.
>> This is the default unless you declare the component itself “immediate”. The
>> meaning is: Unless no one wants to use your service, the component (the
>> implementing Java class) will not be instantiated.
>>
>>
>>
>> Best regards,
>>
>>
>>
>> Kai
>>
>>
>>
>> From: equinox-dev-bounces@xxxxxxxxxxx
>> [mailto:equinox-dev-bounces@xxxxxxxxxxx] On Behalf Of Sameera Jayasoma
>> Sent: Montag, 4. Mai 2009 04:59
>> To: Equinox development mailing list
>> Subject: Re: [equinox-dev] policy="dynamic" in Declarative Services.
>>
>>
>>
>> Hi,
>>
>> On Mon, May 4, 2009 at 8:23 AM, BlueDavy Lin <bluedavy@xxxxxxxxx> wrote:
>>
>> if u want to the component isn't deactivated,u should set the bound
>> service cardinality to "0..1"
>>
>>
>> Thanks for the quick reply. But my requirement is that the service should
>> be registered before the component is activated. in that case I have to put
>> cardinality as "1..1" right?
>>
>> Thanks
>> Sameera
>>
>> 2009/5/4 Sameera Jayasoma <sameera.madushan@xxxxxxxxx>:
>>
>> > Hi devs,
>> >
>> > Even though I have used the value "dynamic" for the "policy" attribute
>> > in
>> > the "reference" element, the component is deactivated once the bound
>> > service
>> > is unregistered. Here is the component.xml I am using.
>> >
>> > <components xmlns:scr="http://www.osgi.org/xmlns/scr/v1.0.0";>
>> >     <scr:component enabled="true" name="carbon.core.dscomponent">
>> >         <implementation
>> > class="org.wso2.carbon.core.internal.CarbonCoreDSComponent"/>
>> >         <property name="service.pid" value="carbon.core.dscomponent"/>
>> >         <reference name="registry.service"
>> > interface="org.wso2.carbon.registry.core.service.RegistryService"
>> > cardinality="1..1" policy="dynamic" bind="setRegistryService"
>> > unbind="unsetRegistryService"/>
>> >     </scr:component>
>> > </components>
>> >
>> > Here is the component implementation class.
>> >
>> > public class CarbonCoreDSComponent{
>> >
>> >     private static Log log =
>> > LogFactory.getLog(CarbonCoreDSComponent.class);
>> >     private BundleContext bundleContext;
>> >
>> >     protected void activate(ComponentContext ctxt) {
>> >         log.info("******* Carbon Core bundle is activated ******* ");
>> >     }
>> >
>> >     protected void deactivate(ComponentContext ctxt) {
>> >         log.info("******* Carbon Core bundle is deactivated ******* ");
>> >     }
>> >
>> >     protected void setRegistryService(RegistryService registryService) {
>> >         System.out.println("--------------------Set Registry Service");
>> >     }
>> >
>> >     protected void unsetRegistryService(RegistryService registryService)
>> > {
>> >         System.out.println("--------------------Unset Registry
>> > Service");
>> >     }
>> > }
>> >
>> > When I stop the bundle which registers the
>> > "org.wso2.carbon.registry.core.service.RegistryService", following out
>> > put
>> > is generated.
>> >
>> > ******* Carbon Core bundle is deactivated *******
>> > {org.wso2.carbon.core.internal.CarbonCoreDSComponent}
>> > --------------------Unset Registry Service
>> >
>> > This mean carbon.core bundle is deactivated right?
>> >
>> > Expected behavior: When the RegisterService is unregisterd, only the
>> > unbind
>> > method should be called. But here first the bundle is deactivated and
>> > then
>> > the unbind method is called.
>> >
>> > Any solution would be greatly appreciated.
>> >
>> > Thanks
>> > --
>> > Sameera Jayasoma
>> > WSO2 Inc.
>> > Oxygenating the Web Service Platform.
>> > http://wso2.org/
>> >
>> > blog: http://tech.jayasoma.org
>> >
>>
>> > _______________________________________________
>> > equinox-dev mailing list
>> > equinox-dev@xxxxxxxxxxx
>> > https://dev.eclipse.org/mailman/listinfo/equinox-dev
>> >
>> >
>>
>>
>>
>> --
>> =============================
>> |     BlueDavy                                      |
>> |     OSGi China User Group Director    |
>> |     http://china.osgiusers.org               |
>> |     http://blog.bluedavy.cn                   |
>> =============================
>> _______________________________________________
>> equinox-dev mailing list
>> equinox-dev@xxxxxxxxxxx
>> https://dev.eclipse.org/mailman/listinfo/equinox-dev
>>
>>
>> --
>> Sameera Jayasoma
>> Software Engineer
>> WSO2 Inc.
>> Oxygenating the Web Service Platform.
>> http://wso2.org/
>>
>> blog: http://tech.jayasoma.org
>>
>> _______________________________________________
>> equinox-dev mailing list
>> equinox-dev@xxxxxxxxxxx
>> https://dev.eclipse.org/mailman/listinfo/equinox-dev
>>
>
>
>
> --
> Sameera Jayasoma
> Software Engineer
> WSO2 Inc.
> Oxygenating the Web Service Platform.
> http://wso2.org/
>
> blog: http://tech.jayasoma.org
>
> _______________________________________________
> equinox-dev mailing list
> equinox-dev@xxxxxxxxxxx
> https://dev.eclipse.org/mailman/listinfo/equinox-dev
>
>



-- 
=============================
|     BlueDavy                                      |
|     OSGi China User Group Director    |
|     http://china.osgiusers.org               |
|     http://blog.bluedavy.cn                   |
=============================