Swagger-codegen: Add SparkJava server code generation

[giflw]

Description

Add support for Spark Java (http://sparkjava.com/) server generation. Spark Java is a micro framework in Java, similar to Scalatra.

[wing328]

@giflw thanks for the suggestion. May I know if you've time to contribute the generator for Spark Java?

If yes, I can show you some good starting points.

[giflw]

@wing328 I can try to do that. I just need some guidance.

[wing328]

Thanks for offering help to create the generator.

I think the Play generator or the MSF4J generator would be a good starting point:

Play: generator, templates
MSF4J: generator, templates

You can start by cloning one of these generators

https://github.com/swagger-api/swagger-codegen/pull/4943 (for Play generator) shows what files need to be added for a new Java server stub generator.

Let us know if you've any questions.

[wing328]

@giflw may I know if you need any help from us (the community) to create the SparkJava generator?

[giflw]

Hi, I'm running short on time this week again, but I'll try to take a look on that next weekend. Any question that arise I'll post here. Thank.

[rvaidya]

+1 this would be very helpful

[wing328]

@rvaidya may I know if you've time to contribute the generator? https://github.com/swagger-api/swagger-codegen/pull/6014/files is a good starting point on what files need to be added.

[giflw]

I've started on this fork https://github.com/giflw/swagger-codegen, branch sparkjava-generator. Help is appreciated :grinning:

[wing328]

@giflw do you mind submitting a PR so that we can review more easily?

[nathanloyer]

I was just searching google to see if this integration exists. This initiative appears to have been abandoned... Any idea on if this will get picked back up?

[giflw]

Hi. I was trying to build that generator, but had changes in projects. One of problems that I was trying to solve was find a simple way to generate routes and register them in the way it's modelled by the generator. Spark simplest approach uses a single file with a main method to register routes. But the best way to model that in swagger generator would be one class per route.