BTW from my exoerience in implementing and specially combining the PropertySources within the ConfigurationContext, I would say SPI handling would be easier, if we would not return optional for the sources. On Configuration I like the idea much more, but on SPI side, I think Optional is an overkill.
WDYT? Best, Anatole -- *Anatole Tresch* Java Engineer & Architect, JSR Spec Lead Glärnischweg 10 CH - 8620 Wetzikon *Switzerland, Europe Zurich, GMT+1* *Twitter: @atsticks* *Blogs: **http://javaremarkables.blogspot.ch/ <http://javaremarkables.blogspot.ch/>* *Google: atsticksMobile +41-76 344 62 79*
