[GUACAMOLE-635] Build against and require Java 1.8 - ASF JIRA

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Details

Type: Improvement
Status: Resolved
Priority: Major
Resolution: Done
Affects Version/s: None
Fix Version/s: 1.0.0
Component/s: guacamole-client
Labels:
None

Description

As discussed on PR #319 for GUACAMOLE-220, and as discussed on the dev@ mailing list, continuing to support Java 1.6 at all levels of guacamole-client makes less and less sense:

Java 1.6 reached end-of-life some time ago.
Java 1.7 has ceased receiving further public updates.
Other mainstream projects which rely on Java have already moved on to 1.7+.

Though guacamole-common should likely remain as compatible as possible, moving all other Java components forward to a 1.8 build seems best, with the upcoming major 1.0.0 release being an ideal time.

The only non-EOL Linux distribution I've been able to find so far that lacks Java 1.8 is Ubuntu 14.04 LTS, which is reaching EOL in April 2019.