2008/10/14 Miroslav Nachev <[EMAIL PROTECTED]>
> Hi,
>
> This is very interesting and I will try it but this answer is half of my
> question. I am interesting how to get some service in my code, not in
> another service. For example:
>
> public class SomePOJOBean
> {
>
> @Requires
> ??? how to pass some parameters to the service (passive, dynamics)
> private FooService foo;
>
> }
>
> How can be implemented the above scenario?
>
Well, iPOJO injects components - but these are not necessarily services.
Clement's example happened to provide a service, but this isn't mandatory.
You do need to tell iPOJO about your code somehow, and in iPOJO this is done
by marking them as components which iPOJO injects as necessary. (I'm sure
Clement can explain this better than me!)
There are also alternative ways to inject OSGi services, using (non-OSGi)
dependency injection frameworks:
* Spring has the Spring-DM extension, but I don't know if it fully supports
configuration via annotation.
http://www.springframework.org/osgi/
* Guice has the peaberry extension, which I work on - in this case the
service configuration is done in the binding module, not the annotation (I
did look at doing annotation configuration, but this rapidly becomes a
management nightmare)
http://code.google.com/p/peaberry/
HTH
Regards,
> Miro.
>
>
>
> clement escoffier wrote:
>
>> Hi,
>>
>> iPOJO provides such annotations as:
>> @Component
>> @Provides // Provides a service
>> public class Foo implements Service {
>> @Requires // Service dependency
>> private HelloService hello;
>>
>>
>> ...
>> }
>>
>> You can find further info at
>> http://felix.apache.org/site/how-to-use-ipojo-annotations.html
>>
>> About parameters, the iPOJO's way is to inject instance property. Those
>> fields will be set before the execution of your constructor (between the
>> super constructor invocation and the constructor code), and your
>> constructor
>> can use those fields, such as in:
>>
>> @Component
>> @Provides // Provides a service
>> public class Foo implements Service {
>>
>> @Property
>> private String myString;
>>
>> @Requires // Service dependency
>> private HelloService hello;
>>
>> public Foo() {
>> // Can use myString here as well as hello
>> }
>> ...
>> }
>>
>> Regards,
>>
>> Clement
>>
>>
>> 2008/10/14 Miroslav Nachev <[EMAIL PROTECTED]>
>>
>>
>>
>>> Hi,
>>>
>>> I would like to ask you about some way in Felix to export services in
>>> more
>>> easy way only with annotation like in EJB3.x: @Stateful, @Stateless,
>>> @Remote, @Local, @EJB, etc.
>>> In my opinion the best way this to be done is inside of the OSGi
>>> framework.
>>> Then all resources (services) can be exported to the framework just with
>>> annotation. The same for needed services. What about if before to get
>>> some
>>> service we have to pass some parameters to the constructor?
>>>
>>>
>>> Regards,
>>> Miro.
>>>
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>>>
>>>
>>>
>>
>>
>>
>
>
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>
--
Cheers, Stuart
