GitHub user StephanEwen opened a pull request:
https://github.com/apache/flink/pull/1853
[FLINK-3700] [core] Add 'Preconditions' utility class.
The functionality that Flink uses from Guava is super simple and limited.
We get a big dependency that has caused a lot of pain in the past, simply
to get access to some simple utility methods. This has cause us quite a bit of
pain in the past, because of Guava version conflicts and the necessary
dependency shading.
In order to reduce the dependency on Guava, this adds a simple Flink
Preconditions class.
While referencing well established libraries is a good idea for standalone
apps, it is a problem for frameworks like Flink, if the dependencies are not
well-behaved with respect to version compatibility. Guava is not well behaved
in that sense.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/StephanEwen/incubator-flink
flink_preconditions
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/flink/pull/1853.patch
To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:
This closes #1853
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