How to use the Etsy API by using the OpenAPI spec to generate code for Java Spring Boot.

How to implement a Spring Boot domain object / JPA entity that handles Stripe event webhook callback, using a custom @Convert to save to a MySQL database as a json type column.

(That should cover the buzzwords, Google bait and scare off anyone who doesn’t care.)

How to create a SSH tunnel in a Java app from a localhost port through a jump box to a specific port on a server. Allowing a connection to the remote server port as if it was a localhost port.

Examples found online provided only one ‘hop’, not the double ‘hop’ needed. The code below supports 2 hops, but in theory could be used to support any number of hops.