I have helped the TwelveMonkeys image manipulation library[1] with OSGi support. However, when I try using I see that only the image reader services are exported from the bundles.
I need help figuring out why the image writer services aren't exported. I need advice on the maven-bundle-plugin config. TwelveMonkeys hooks into the JRE ImageIO API using the Java Service Provider Interface (SPI)[2]. I handle the SPI services by using the OSGi ServiceLoader Mediator mechanism[3]. My changes to TwelveMonkeys[4] consists of maven-bundle-plugin config, adding package export/imports and Require-Capability and Provide-Capability headers for the OSGi service loader mediator. I use apache Aries SPI Fly[5] at runtime to load the services. In Apache Karaf, when I look at a bundle that should provide two services (javax.imageio.spi.ImageReaderSpi and javax.imageio.spi.ImageWriterSpi) it provides only javax.imageio.spi.ImageReaderSpi: https://gist.github.com/steinarb/5c84fef1e76976e276681f6f0b697e35 This is what I'm trying to do to provide the services: https://github.com/haraldk/TwelveMonkeys/blob/master/imageio/imageio-jpeg/pom.xml#L43 However this results in the following MANIFEST.MF: https://gist.github.com/steinarb/5256d998721f0c9dd33d25c100bc420d#file-gistfile1-txt-L32 Note the "~=" between osgi.serviceloader and "javax.imageio.spi.ImageWriterSpi" Does that means "exclude" rather than "include"? And if so: what should the maven-bundle-config look like to provide both services? Thanks! - Steinar References: [1] <https://github.com/haraldk/TwelveMonkeys> [2] <https://www.baeldung.com/java-spi> [3] <https://docs.osgi.org/specification/osgi.cmpn/7.0.0/service.loader.html> [4] <https://github.com/haraldk/TwelveMonkeys/pull/814> [5] <https://aries.apache.org/documentation/modules/spi-fly.html>
