[SOLR-12586] Replace use of Joda Time with Java 8 java.time

• Type: Improvement
• Status: Closed
• Priority: Minor
• Resolution: Fixed
• Fix Version/s: 8.0
• Assignee: David Smiley
• Reporter: David Smiley
• Created: 24/Jul/18 16:28
• Updated: 08/Jun/19 14:57
• Resolved: 07/Aug/18 15:53

Description

We're using Joda Time, a dependency in a couple places.  Now that we are on Java 8, we ought to drop the dependency, using the equivalent java.time package instead.  As I understand it, Joda time more or less was incorporated to Java as java.time with some fairly minor differences.

Usages:

• ConfigSetService
• ParseDateFieldUpdateProcessorFactory

And some related tests.

---

Note this is a fairly impactful change due to a change in the pattern language. Here are the "upgrade notes" in changes.txt:

The date format patterns used by ParseDateFieldUpdateProcessorFactory (present in "schemaless mode")
are now interpreted by Java 8's java.time.DateTimeFormatter instead of Joda Time. The pattern language is very
similar but not the same. Typically, simply update the pattern by changing an uppercase 'Z' to lowercase 'z' and
that's it. For the current recommended set of patterns in schemaless mode, see "Schemaless Mode" in the ref guide.

Issue Links

• links to: GitHub Pull Request #428