replace guava with java8 native

[skuehn]

This change replaces guava with java native alternatives. The intent is to make this library a bit more portable for runtime environments that force old incompatible versions of guava (such as spark and hadoop).

Some PR notes: there isn't a clear alternative to VisibleForTesting, but since the annotation isn't parsed anywhere I figured a comment was functionally equivalent. There isn't a great Iterables.partition built-in in java8 that preserves ordering, so I used a basic iterating subList approach that should be readable at a glance.

FWIW so far I've worked around the guava compatibility issue by relocating the guava packages, and it seems to work fine, but relocation is a bit clunky and removing guava was straight forward.

[azagniotov]

@skuehn thanks for the PR!
I think you can still use Java 8 Stream API to partition, e.g.: something across the following lines:

 final int[] itemCounter = new int[]{0};
 final Collection<List<MetricDatum>> metricDataPartitions = metricData.stream()
    .collect(Collectors.groupingBy(item -> itemCounter[0]++ / MAXIMUM_DATUMS_PER_REQUEST))
    .values();

[azagniotov]

@skuehn I released version 1.0.8 to Maven Central. Please allow a few hours for it to become live

[skuehn]

Awesome - thanks for the quick response and for sharing and maintaining this project. Do you want a PR with the Collectors.groupingBy approach? FWIW I thought the stratified list creation (via dividing by max datums) was a bit odd so I avoided it. Regardless let me know if you want the fix.

[azagniotov]

No worries! Thanks again for your PR :) I ended up tinkering with "groupingBy" yesterday and added this change myself after merging your PR.

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On Jun 25, 2018, at 4:38 AM, Scott Kuehn ***@***.***> wrote: Awesome - thanks for the quick response and for sharing and maintaining this project. Do you want a PR with the Collectors.groupingBy approach? FWIW I thought the stratified list creation (via dividing by max datums) was a bit odd so I avoided it. Regardless let me know if you want the fix. — You are receiving this because you modified the open/close state. Reply to this email directly, view it on GitHub, or mute the thread.