IRC log for #sourcefu, 2016-04-26

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Time	S	Nick	Message
17:15		pdurbin	aditsu semiosis: what do you think of ServiceLoader? https://docs.oracle.com/javase/tutorial/ext/basics/spi.html ... my use case is basically http://stackoverflow.com/questions/16102010/dynamically-loading-plugin-jars-using-serviceloader
17:18		aditsu	pdurbin: I've used it; the concept is great but I don't like the implementation very much (but it works)
17:19		semiosis	i wrote a filesystem provider plugin by implementing the NIO.2 SPI. was a big project but it actually worked. lets you connect to glusterfs using native java filesystem API... github.com/semiosis/glusterfs-java-filesystem
17:21		pdurbin	aditsu: ok. thanks
17:22		pdurbin	semiosis: well, I'm not interested in writing the plugin itself but rather the plugin system that allows others to write plugins by dropping jars into place: https://github.com/IISH/dataverse/commit/a1c7615#commitcomment-17238686
17:25		aditsu	you just write an interface and then use ServiceLoader to load implementations
17:27		aditsu	people implement it and add a reference under META-INF
17:29		pdurbin	aditsu: cool. sounds like what I want. lighter than OSGi and I don't have to wait for Jigsaw (Java 9)
17:30		aditsu	btw, that SO question seems to be more about adding jars at runtime (which I haven't tried, and is not done by ServiceLoader)
17:31		aditsu	ServiceLoader just loads whatever it can find in the current classpath
17:31		semiosis	i get the impression that loading jars at runtime is hard. both eclipse (last time i used it) and intellij require a restart of the app to add/remove plugins
17:33		aditsu	eclipse doesn't usually require it, but strongly encourages you to restart anyway
17:33		semiosis	i would also look for other libs to handle plugins that may work better for you than the core javase api
17:34		semiosis	maybe this one? https://github.com/decebals/pf4j
17:34		pdurbin	wait, I though you could load jars at runtime with ServiceLoader
17:35		pdurbin	semiosis: interesting. thanks
17:35		pdurbin	"With PF4J you can easily transform a monolithic java application in a modular application."
17:35		aditsu	nope, the typical usage is you add a jar with an implementation and start (or restart) the application
17:35		pdurbin	aditsu: oh, well that's fine. people can stop the app for a bit
17:37		pdurbin	it's doesn't need to be that dynamic :)
17:37		aditsu	you can also do it at runtime, as shown in that question; the 2nd example is cleaner
17:38		pdurbin	cool
17:39		aditsu	(just ServiceLoader doesn't do it for you)
17:40		pdurbin	right
17:41		aditsu	it still helps a bit - it lets you give it a custom ClassLoader
19:57			sivoais joined #sourcefu

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