Thank you Mr. Guillaume.
Where you mentioned, " Get the iPOJO Factory service (associated with the
type/component you want to instantiate) and call Factory.createInstance(...)"
I would love to achieve that. But I am seeking since a week for the syntax code
to achieve that. Here's what I did:
In my Java Application:
@Requires(filter="(factory.name=my-factory)")
private Factory factory;
THEN,
ComponentInstance instance =
factory.createComponentInstance(null);
instance.start();
This keeps raising a Null Pointer Exception that factory is NULL. But my bundle
has a component with the name factory and that bundle is up and running, and I
can see that my-factory is alive as well by the command:
g! ipojo:factories
Factory my-factory (VALID)
Can you just help me with the right syntax of getting a factory service, so I
can instantiate my component. Thanks.
-----Original Message-----
From: Guillaume Sauthier (OW2/GMail) [mailto:[email protected]]
Sent: Sunday, January 26, 2014 12:29 PM
To: [email protected]
Subject: Re: iPOJO Components instantiated but no visible output
No, DefaultInstanceDeclaration CANNOT be used at the moment from outside of
iPOJO bundle.
This is a dead-end.
A common use case is to define type (component) and instance statically:
using the metadata.xml iPOJO description file.
A more dynamic use case is to only create instance dynamically (type/components
are still statically described).
In that case, there are plenty solutions available:
* Get the iPOJO Factory service (associated with the type/component you want to
instantiate) and call Factory.createInstance(...)
* Using ConfigAdmin: you create Configuration objects and push them the the CA
service. iPOJO will obtain that configuration and create the instance for you
You talked a bit about the all dynamic use case. I must tell that it's mode
complexe and probably less adapted to all cases.
Imagine that you have a class designed for another component model: scr, dm,
blueprint, ...
You don't want to change the code of these classes: the so-called iPOJO API is
for you.
You'll be able to tell iPOJO to modify/manipulate the class bytecode and make
it a full-blown iPOJO component.
And then, that API facilitate you the instance creation (but it's the Factory
methods that are used behind the hood).
Is this clearer ?
So in your case, I would suggest you to start with metadata.xml (or
annotations) to describes types of components.
And then create instances through config admin.
I would also suggest you to take a look at file install that have a nice file
format to declares configuration dynamically.
--G
2014/1/26 Zaid Jamal Saeed Al Mahmoud <[email protected]>
> Thank you Mr. Clement for your response.
>
> Actually, I prefer to create the component types dynamically.
> Therefore, annotations is not my first preference when it comes to
> creating the component type. As I mentioned earlier, I am targeting
> ipojo APIs. The more things are dynamic, the happier I will be.
>
> I've been reading in the link you sent me to configure the framework.
> It is not clear in that page which properties are used to solve my
> class loader issue. I've tried the following properties:
>
> org.osgi.framework.system.packages.extra
>
> org.osgi.framework.bundle.parent:
>
> I suspected the later one since its description says, "Specifies which
> class loader is used for boot delegation", and you mentioned that I am
> using the wrong class loader.
>
> I tried to configure the framework with different values for those
> properties but none of them helped solving my issues. My instance is
> still not available.
>
> I'd appreciate it if you can possibly be more specific regarding which
> property/properties I need to set when configuring Felix, so it helps
> me solving the problem.
>
> Thanks again for your help.
>
>
>
> Zaid
> -----Original Message-----
> From: Clement Escoffier [mailto:[email protected]]
> Sent: Saturday, January 25, 2014 6:32 PM
> To: Apache Felix - Users Mailing List
> Subject: Re: iPOJO Components instantiated but no visible output
>
> Hi,
>
>
> The example you just gave use the iPOJO API. This API is intended to
> create component types (i.e. factories) dynamically which does not
> seem to be what you want. This way works but is really cumbersome as
> you can't use the annotations.
>
> What I proposed you was to use either the config admin or the factory
> service or instance declarations. It looks like iPOJO can't see your
> instance declaration because they are exposed using the wrong class
> loader (from code outside the OSGi framework). I realized the issue
> when reading all your mails again. To get it to work this way, check
> how to configure the framework to avoid class loader mismatch between
> code from inside and outside the framework:
> http://felix.apache.org/site/apache-felix-framework-launching-and-embe
> dding.html
>
> Regards,
>
> Clement
>
>
> On 25 janv. 2014, at 14:33, Zaid Jamal Saeed Al Mahmoud <
> [email protected]> wrote:
>
> > Dear Mr. Clement,
> >
> > I really want to know so bad, why you told the person in this post:
> http://apache-felix.18485.x6.nabble.com/Using-iPOJO-API-to-create-components-and-instances-td4881802.htmlthat
> his code should work if he used the following way:
> >
> > new PrimitiveComponentType()
> > .setBundleContext(localContext)
> > .setClassName(ProviderA.class.getName())
> > .setValidateMethod("start")
> > .setInvalidateMethod("stop")
> > .addService(new Service())
> > .createInstance("TestProviderA");
> >
> > But you told me not to use this way and to use
> DefaultInstanceDeclaration instead.
> >
> > This really confused me because I saw an answer for you in the same
> > post
> with the following code:
> >
> > type = new
> PrimitiveComponentType().setBundleContext(bundle.getBundleContext())
> > .setComponentTypeName("raw.type")
> > .setClassName("org.apache.felix.ipojo.test.asm.Raw")
> > .setImmediate(true);
> > type.start();
> >
> > instance = type.createInstance();
> >
> >
> > What's different in my case? I can maybe switch to the other way if
> Declaration Instance doesn't work. So, I need a clarification from you.
> >
> >
> >
> > Zaid
> >
> > -----Original Message-----
> > From: Zaid Jamal Saeed Al Mahmoud
> > Sent: Saturday, January 25, 2014 12:03 AM
> > To: '[email protected]'
> > Subject: RE: iPOJO Components instantiated but no visible output
> >
> > Yes. This is the output:
> >
> > ipojo:instances
> > Instance org.apache.felix.ipojo.arch.gogo.Arch-0 -> valid
> >
> >
> >
> > -----Original Message-----
> > From: Clement Escoffier [mailto:[email protected]]
> > Sent: Saturday, January 25, 2014 12:01 AM
> > To: Apache Felix - Users Mailing List
> > Subject: Re: iPOJO Components instantiated but no visible output
> >
> > Hi,
> >
> > Could you try :
> >
> >> ipojo:instances
> >
> > Regards,
> >
> > Clement
> >
> > On 24 janv. 2014, at 20:49, Zaid Jamal Saeed Al Mahmoud <
> [email protected]> wrote:
> >
> >> Hey, I manipulated my bundle using Ipojo Ant Task, as the following:
> >>
> >> <project>
> >> <target name="main">
> >> <!-- Change the path to point on the iPOJO Ant task jar-->
> >> <taskdef name="ipojo"
> >> classname="org.apache.felix.ipojo.task.IPojoTask"
> >>
> classpath="C:/Users/zaid.almahmoud/Dropbox/EBTIC/ADERE/feasibility-cod
> es/ipojo/ipojo-distribution-1.11.0/bundle/org.apache.felix.ipojo.ant-1
> .11.0.jar"/>
> >> <ipojo
> >>
> input="C:/Users/zaid.almahmoud/Desktop/plugins/HelloService_1.0.0.201401222235.jar"
> >>
> output="C:/Users/zaid.almahmoud/Desktop/plugins/Manipulated_HelloService.jar"
> >> />
> >> </target>
> >> </project>
> >>
> >>
> >> Now, I can see in my app that the factory is valid. This is the
> >> output
> in the command:
> >> g! ipojo:factories
> >> Factory my-factory (VALID)
> >> Factory org.apache.felix.ipojo.arch.gogo.Arch (UNKNOWN) - Private
> >>
> >> Therefore the factory "my-factory" is available unlike before.
> >>
> >>
> >> However, my instance is not available, which was created as the
> following:
> >> DefaultInstanceDeclaration providerDeclaration = new
> DefaultInstanceDeclaration(b.getBundleContext(), "my-factory");
> >> providerDeclaration.start();
> >>
> >> Again, this does not show an error, but it doesn't display the
> >> expected
> output in the start() method of the bundle, and on the command, I can see:
> >>
> >> g! ipojo:instance my-factory-0
> >> Instance named 'my-factory-0' not found
> >>
> >>
> >> Can you help please? Thanks.
> >>
> >>
> >>
> >>
> >>
> >>
> >> -----Original Message-----
> >> From: Zaid Jamal Saeed Al Mahmoud
> >> [mailto:[email protected]]
> >> Sent: Thursday, January 23, 2014 2:15 PM
> >> To: [email protected]
> >> Subject: RE: iPOJO Components instantiated but no visible output
> >>
> >> It displays this:
> >>
> >> ipojo:factories
> >> Factory org.apache.felix.ipojo.arch.gogo.Arch (UNKNOWN) - Private
> >>
> >>
> >> I am not sure what you mean by iPOJO manipulation on my bundles,
> >> But again, I am not using ANT or MAVEN. I export the bundles
> >> normally in
> eclipse (Using export->deployable plugins and fragments).
> >> Could it be the issue?
> >>
> >>
> >> -----Original Message-----
> >> From: Clement Escoffier [mailto:[email protected]]
> >> Sent: Thursday, January 23, 2014 11:52 AM
> >> To: Apache Felix - Users Mailing List
> >> Subject: Re: iPOJO Components instantiated but no visible output
> >>
> >> Hi,
> >>
> >> The output are interesting, it looks like your instances are not
> declared correctly. Can you try:
> >>
> >>> ipojo:factories
> >>
> >>
> >> By the way, how are you applying the iPOJO manipulation on your
> >> bundles
> ?
> >>
> >> Regards,
> >>
> >> Clement
> >>
> >> On 23 janv. 2014, at 08:30, Zaid Jamal Saeed Al Mahmoud <
> [email protected]> wrote:
> >>
> >>> Okay, I did that. Here's the output:
> >>>
> >>> g! ipojo:instances
> >>> Instance org.apache.felix.ipojo.arch.gogo.Arch-0 -> valid
> >>>
> >>> g! ipojo:instance my-factory-0
> >>> g! Instance named 'my-factory-0' not found
> >>>
> >>> g! ipojo:instance my-consumer-factory-0 Instance named
> >>> 'my-consumer-factory-0' not found
> >>>
> >>>
> >>>
> >>>
> >>> -----Original Message-----
> >>> From: Clement Escoffier [mailto:[email protected]]
> >>> Sent: Thursday, January 23, 2014 10:58 AM
> >>> To: Apache Felix - Users Mailing List
> >>> Subject: Re: iPOJO Components instantiated but no visible output
> >>>
> >>> Hi,
> >>>
> >>> Could you use the 'instances' command to retrieve the list of
> instances and their state ?
> >>> (http://felix.apache.org/documentation/subprojects/apache-felix-ip
> >>> oj
> >>> o
> >>> /apache-felix-ipojo-tools/ipojo-arch-command.html)
> >>>
> >>>> ipojo:instances
> >>> // dump all instances and declaration
> >>>> ipojo:instance my-factory-0
> >>> // introspect the first instance
> >>>> ipojo:instance my-consumer-factory-0
> >>> // introspect the second instance
> >>>
> >>> Regards,
> >>>
> >>> Clement
> >>>
> >>>
> >>> On 22 janv. 2014, at 20:38, Zaid Jamal Saeed Al Mahmoud <
> [email protected]> wrote:
> >>>
> >>>> I have 2 iPOJO Components.
> >>>> 1- A Provider bundle that provides "Hello" service. Below is the
> implementation of the component:
> >>>> package helloipojo;
> >>>>
> >>>>
> >>>> import helloipojo.service.HelloService;
> >>>>
> >>>> import org.apache.felix.ipojo.annotations.Component;
> >>>> import org.apache.felix.ipojo.annotations.Invalidate;
> >>>> import org.apache.felix.ipojo.annotations.Provides;
> >>>> import org.apache.felix.ipojo.annotations.Validate;
> >>>>
> >>>>
> >>>> @Component(name="my-factory")
> >>>> @Provides
> >>>> public class HelloServiceImpl implements HelloService{
> >>>>
> >>>> @Override
> >>>> public void sayHello() {
> >>>>
> >>>> System.out.println("Hello iPojo!");
> >>>>
> >>>> }
> >>>>
> >>>>
> >>>> @Validate
> >>>> public void start() throws Exception {
> >>>>
> >>>> System.out.println("Hello, I am ipojo bundle start method");
> >>>>
> >>>> }
> >>>>
> >>>> @Invalidate
> >>>> public void stop() throws Exception {
> >>>>
> >>>> System.out.println("Bye Bye, I am ipojo bundle stop method");
> >>>>
> >>>> }
> >>>>
> >>>>
> >>>>
> >>>> }
> >>>> 2- Consumer bundle that uses HelloService object as the follwing:
> >>>> package helloserviceconsumer;
> >>>>
> >>>> import helloipojo.service.HelloService;
> >>>>
> >>>> import org.apache.felix.ipojo.annotations.Component;
> >>>> import org.apache.felix.ipojo.annotations.Invalidate;
> >>>> import org.apache.felix.ipojo.annotations.Requires;
> >>>> import org.apache.felix.ipojo.annotations.Validate;
> >>>>
> >>>> @Component(name="my-consumer-factory")
> >>>> public class HelloConsumer {
> >>>> @Requires
> >>>> HelloService helloObject;
> >>>>
> >>>> @Validate
> >>>> private void start() {
> >>>> // Starting method
> >>>> //...
> >>>> helloObject.sayHello();
> >>>> //...
> >>>> }
> >>>>
> >>>> @Invalidate
> >>>> protected void stop() {
> >>>> // Stopping method
> >>>> if(helloObject!=null) {
> >>>> helloObject.sayHello(); }
> >>>>
> >>>> else System.out.println("hello service GONE!");
> >>>> }
> >>>> }
> >>>> In a seperate Java application, I load these two bundles and
> >>>> start
> them on Apache Felix as the following:
> >>>> Bundle b =
> >>>> bundleContext1.installBundle("file:C:\\Users\\zaid.almahmoud\\Des
> >>>> kt o p\ \plugins\\HelloService_1.0.0.201401222235.jar");
> >>>> b.start();
> >>>>
> >>>> Bundle c =
> >>>> bundleContext1.installBundle("file:C:\\Users\\zaid.almahmoud\\Des
> >>>> kt o p\ \plugins\\HelloServiceConsumer_1.0.0.201401222257.jar");
> >>>> c.start();
> >>>> All the above works fine.
> >>>> Now, I would like to instantiate these two components dynamically
> >>>> and
> observe the consumption of the bundle provider service by the bundle
> consumer. I used Instance Declaration, as the following:
> >>>> DefaultInstanceDeclaration providerDeclaration = new
> DefaultInstanceDeclaration(b.getBundleContext(), "my-factory");
> >>>> providerDeclaration.start();
> >>>>
> >>>> DefaultInstanceDeclaration consumerDeclaration = new
> DefaultInstanceDeclaration(c.getBundleContext(),
> "my-consumer-factory");
> >>>> consumerDeclaration.start(); No errors
> >>>> when running the application. However, I could not see the "Hello"
> Messages that exists in the start() methods of both the service
> provider and consumer. I see absolutely NOTHING. That means the
> components are not instantiated correctly. Where did I go wrong? Thanks.
> >>>>
> >>>>
> >>>>
> >>>> Zaid.
> >>>>
> >>>
> >>>
> >>> ------------------------------------------------------------------
> >>> --
> >>> - To unsubscribe, e-mail: [email protected]
> >>> For additional commands, e-mail: [email protected]
> >>>
> >>
> >>
> >> -------------------------------------------------------------------
> >> -- To unsubscribe, e-mail: [email protected]
> >> For additional commands, e-mail: [email protected]
> >>
> >>
> >> -------------------------------------------------------------------
> >> -- To unsubscribe, e-mail: [email protected]
> >> For additional commands, e-mail: [email protected]
> >>
> >>
> >> -------------------------------------------------------------------
> >> -- To unsubscribe, e-mail: [email protected]
> >> For additional commands, e-mail: [email protected]
> >>
> >
> >
> > --------------------------------------------------------------------
> > - To unsubscribe, e-mail: [email protected]
> > For additional commands, e-mail: [email protected]
> >
> >
> > --------------------------------------------------------------------
> > - To unsubscribe, e-mail: [email protected]
> > For additional commands, e-mail: [email protected]
> >
>
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: [email protected]
> For additional commands, e-mail: [email protected]
>
>
---------------------------------------------------------------------
To unsubscribe, e-mail: [email protected]
For additional commands, e-mail: [email protected]
