OSGi Service comsumer and provider

[Lukas Heidbreder]

Hello, everyone.

I've run into the following issue and I hope, someone here is more knowledgable than me.

For a plugin I am trying to rewrite, I intend to implement OSGi service behavior. Having had a look at core code, I tried a few ways of recreating the behavior here:

Consumer

Provider

However, when I run the code, the provider will never be found. Now, am I doing something wrong, do I have to do something special in iDempiere environments or is it straight up impossible from plugins?

Thanks in advance

[Orlando Curieles]

Hi, can you show me the code ??

Regards

 Orlando

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[Lukas Heidbreder]

Since there is a lot of boilerplate code, I hope you will allow a few github links. All implementations are pretty minimal.

One of the Interfaces: https://github.com/Martin-Schoenbeck-Beratungen-GmbH/beluga.serverprint/blob/printer-provider-extraction/src/printProvider/PrinterLookup.java

The Provider Implementation: https://github.com/Martin-Schoenbeck-Beratungen-GmbH/beluga.serverprint/blob/printer-provider-extraction/src/providerImpl/CupsProvImpl.java

The method referencing the service, `getLookup`: https://github.com/Martin-Schoenbeck-Beratungen-GmbH/beluga.serverprint/blob/printer-provider-extraction/src/printProvider/ServerPrintProcessManager.java#L40

Before I used the @Component annotation, I tried this XML: https://github.com/Martin-Schoenbeck-Beratungen-GmbH/beluga.serverprint/blob/printer-provider-extraction/OSGI-INF/provImpl.xml.old

[Heng Sin Low]

That looks pretty straightforward, make sure the plugin hosting the provider have been activated and service is available. You can check that at the osgi console.

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[Heng Sin Low]

Btw, to look up OSGi service, you should use org.adempiere.base.Service instead of java.util.ServiceLoader.

It seems the xml configuration file is missing for CupsProvImpl. If you are using @Component annotation, you need to enable Window > Preferences > Plug-in Development > DS Annotations > Generate descriptor from annotated sources.

[Orlando Curieles]

Maybe you can read this thread:

https://groups.google.com/g/idempiere/c/kPGbrO0WTjE

Regards.

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