SingletonSupplier is not singleton if null is returned on first supplier call #5
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Previously, SingletonSupplier stored "null" in singletonInstance when the supplied instance was "null". On subsequent get() calls, this was treated as "uninitialized" and triggered another attempt to obtain an instance. This commit ensures that a "null" returned from the instanceSupplier or defaultSupplier is handled correctly, so that subsequent calls to get() return "null" consistently instead of repeatedly invoking the supplier. Signed-off-by: Dmytro Nosan <dimanosan@gmail.com>
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See spring-projects#35369