Guava 20 compatibility
Description
With Guava 20 being recently released (Release20) there are a few incompatibilities that prevent it working with the java driver, namely:
Futures.withFallback => Futures.catchingAsync
Futures.transform with AsyncFunction => transformAsync
TypeToken#isAssignableFrom => TypeToken#isSupertypeOf
MoreExecutors.sameThreadExecutor() => MoreExecutors.directExecutor() / MoreExecutors.newDirectExecutorService()
Objects => MoreObjects
Sets.newSetFromMap => Collections.newSetFromMap
Should investigate if we could somehow support Guava 20 and older versions (back to 16.01).
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I remember that the statu quo back in 2015 was already hard on you. We have never been particularly supportive of Guava. The only reason we did not attempt to remove it completely in 3.0 is because we still have users on JDK 6 and 7.
Version 4.0 aims to be a complete rewrite of the driver internals and should drop support for JDK 6 and 7. We are actively working on it currently, but there is no timeframe available yet. I think your best option right now is to upgrade to 3.2.0 as soon as you can.
For easy upgrade from 3.x to 4.x, please think about a compatibility library (that maps guava types to/from java8 types) so 3.x users can use the 4.x driver and migrate their code at their own pace.
That is already in our todo list
Version 4.0 aims to be a complete rewrite of the driver internals and should drop support for JDK 6 and 7. We are actively working on it currently, but there is no timeframe available yet. I think your best option right now is to upgrade to 3.2.0 as soon as you can.
Do you mean to use CompletableFuture instead of Guava's ListenableFuture in 4.x? Is there any list of changes / roadmap?
Driver 4.0.0-alpha1 is out. No more Guava No compatibility layer at this point, but if you think you need one, please open a ticket for that.
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