>>>>> Steinar Bang <s...@dod.no>: > Aries Spifly was logging very little, so it was hard to debug. > Figuring out where the log level should be upped, turned out to be > surprisingly easy, however... > > https://github.com/apache/karaf/blob/main/assemblies/features/base/src/main/resources/resources/etc/org.ops4j.pax.logging.cfg#L51
I now have some success: I created a DS component that listens for the OSGi services created by Aries spyfly, from the Twelvemonkeys SPI services, and registers the injected services with the imageio ServiceRegistry. The full strory follows: Logging told me that the SPI services were found by spifly: https://gist.github.com/steinarb/6dd2b87cca74f483c560abd3f05868e2#file-karaf-log-L408 However imageio still picked the built-in com.sun.imageio.plugins.jpeg.JPEGImageReader to read a JPEG (JFIF) file: https://gist.github.com/steinarb/6dd2b87cca74f483c560abd3f05868e2#file-karaf-log-L478 It turns out there is no magic in Aries Spifly that makes it find the SPI registry that listens for SPI services and register the service there. I tried using the Spifly-specific MANIFEST.MF header SPI-Consumer to specify a class and method to consume the SPI services. https://aries.apache.org/documentation/modules/spi-fly.html#specificconf But I would need to go via two method calls to get to the one I need, ie. IIORegistry.getDefaultInstance().registerServiceProvider(service); I tried doing it like this, but that didn't work SPI-Consumer: javax.imageio.spi.IIORegistry#getDefaultInstance#registerServiceProvider and, not surprising, because I think the Spifly SPI-Consumer code only provides for calling a method on a class. If there had been a static method that could be called to register an imageio service I think maybe the SPI-Consumer MANIFEST.MF header would have worked...? But since the spifly docs say: "Additionally services found in META-INF/services are registered in the OSGi Service Registry." I decided to try a DS component that injects all Twelvemonkeys SPI services as OSGi services and use them to register the service in the imageio service registry: https://github.com/steinarb/twelvemonkeys-karaf-demo/blob/master/src/main/java/no/priv/bang/demos/frontendkarafdemo/ImageioSpiRegistration.java#L12 And that worked. https://gist.github.com/steinarb/abb91df9447d00f73963f366fcc01771#file-karaf-log-L491 I don't know if this is the correct way to do imageio SPI service registration, but it worked, so this is what I'm rolling with for now.
