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How to get a plugin that is no dependency [message #1020464]

Mon, 18 March 2013 08:39

Markus Jo

Messages: 83
Registered: January 2012

Member

Hi,
I have a problem.....I have two plugins....A and B. B knows A, which means in the manifest.mf A is entered as required bundle.

A does not know B and is not able to access plugin B....but A needs to get some translation from B using A.INSTANCE.getString("Some_localization", true);

Is there a way to get the B-Plugin-Instance during runtime ? Something like a plugin-registry or a mehtod the the the B-plugin by its String id ?

Thx

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Re: How to get a plugin that is no dependency [message #1021485 is a reply to message #1020464]

Wed, 20 March 2013 07:45

Markus Jo

Messages: 83
Registered: January 2012

Member

Hat keiner eine Idee ??? Kann mir auch kein Pro sagen "vergiss es, das geht nicht" ?

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Re: Re: How to get a plugin that is no dependency [message #1022083 is a reply to message #1021485]

Thu, 21 March 2013 08:57

Wim Jongman

Messages: 423
Registered: July 2009

Senior Member

Hi Markus,

> Hat keiner eine Idee ??? Kann mir auch kein Pro sagen "vergiss es, das geht
nicht" ?
Don't get excited, we were pondering your question ;)

You want to look at OSGi services. This is an instance of an object that gets
registered in the OSGi service registry (read hashmap) with the interface
name as key.

You do it like this:

Make an interface in a model plugin: ITransalator. This plugin is known to A
and B. Then let B make an implementation of ITranslator and put it in the
service registry where A can pick it up. Simple and powerful.

You can use the OSGi class FrameworkUtil to register and get services from
the registry.

I have a little demo application that uses a different approach: dynamic
services [1].

You should study both: it is very cool.

Best regards,

Wim

[1] https://github.com/wimjongman/dynamic-services-demo

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