I am going to work on this with the goal of providing ElasticSearch integration. Some thoughts/questions:

1. Which client to use?

• ES default
  • Pro: Offers all functionality provided by latest ES
  • Con: Ties to a specific ES and Lucene version which are pulled into the application classpath; The latter is 4.x atm. Makes it a non-viable option really
• Jest
  • Pro: Works with several ES versions; Does not pull in Lucene libraries into client
  • Con: Quite dependency-heavy, specifically Guava is pulled in
• Raw REST/JSON client, e.g. RESTEasy
  • Pro: Probably less dependencies
  • Con: Quite low-level API, not specific to ES domain

For my first steps I will be using Jest.