NOTE: I have no idea if this is done before. I didn't check on the internet if something similar was made.

For the 1.11 update, the Observer block has been added, which opens a ton of new ways to build machines, scaling from small to huge.

With this i built a decent small-sized fully automatic sugarcane farm,
and it is infinitely long tileable!

For 1 sugarcane, it requires a Observer, a piston, a sticky piston and obviously water/hoppers to transport them.
You can see how it is built in the screenshots.
You just put a block to the sticky piston, and you are good to go!

I have no idea if this still works when 1.11 is released, but it sure does in 16w42a.
So try it out for yourself!

I won't be attaching a world file or schematic, as it seems a bit useless for such a small machine.

I will check every minecraft update if it still works.