Configuring a project/designing an integration: have questions

[Mia Paulin]

@mention Hi all! I have a question.  i'm implementing a design for a system and using a diagram from Atlassian developer as a guide, even though I'm creatingf my own solution.  One thing I'm seeing is a Lucene component, a quartz component that has two Jira Services in it(that I'm guessing are like service oriented design services), the Lucene index files (which I'm guessing are the index files/main pages returned from a request/ aka a response) and the jelly.  I was just wondering what hosde were and what is was that they do so I will know how to implement my solution.  I'm writing in a different language and doing a custom design, yet I want to know their functionality.