[OPENNLP-1447] Move from System.out/System.err to SLF4J

• Type: Epic
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 2.2.0
• Epic Name: Move from System.out/System.err to SLF4J
• Assignee: Richard Zowalla
• Reporter: Richard Zowalla
• Created: 20/Jan/23 07:22
• Updated: 22/Apr/23 17:39
• Resolved: 09/Mar/23 14:12

Description

As discussed on the mailing list, we are in favour of moving from System.out / System.err to proper log output.

The discussion is here: https://lists.apache.org/thread/vt748qbz5onhwhh70kky9wk1o5zm42tm

To reduce reviewer burden, we should tackle the task in several steps.

Issue Links

• is related to: OPENNLP-675 Absence of logging and usage of System.out
• is related to: OPENNLP-1089 Reduce printing of iterations in JUnit tests

Sub-Tasks

• Introduce SLF4J in OpenNLP: Closed
• Revise log levels in OpenNLP: Closed
• Revise log messages in OpenNLP: Closed
• Reduce log output during builds: Closed
• Revise CLI tool descriptions: Closed