[DRILL-7683] Add "message parsing" to new JSON loader

• Type: Improvement
• Status: Resolved
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 1.18.0
• Fix Version/s: 1.18.0
• Labels: ready-to-commit
• Assignee: Paul Rogers
• Reporter: Paul Rogers
• Reviewer: Arina Ielchiieva
• Created: 31/Mar/20 18:57
• Updated: 18/Apr/20 20:07
• Resolved: 11/Apr/20 15:36

Description

Worked on a project that uses the new JSON loader to parse a REST response that includes a set of "wrapper" fields around the JSON payload. Example:

{ "status": "ok", "results: [ data here ]}

To solve this cleanly, added the ability to specify a "message parser" to consume JSON tokens up to the start of the data. This parser can be written as needed for each different data source.

Since this change adds one more parameter to the JSON structure parser, added builders to gather the needed parameters rather than making the constructor even larger.

Issue Links

• links to: GitHub Pull Request #2045