Most of my job is black box testing our Java/Spring/Angular application. My nightly tests are not working so well, so I'm looking at log output. I could parse these strings into data structures, but it just occurred to me: since logging in Java seems to require handing the logger some implementation, is there an implementation that will produce structured data instead of strings?

Logback is pretty happy emitting json, though I don’t know how hard or possible it would be for it to emit message with attributes beyond the ones it records intrinsically

there is a thing, "Mapped Diagnostic Context" that you can put key/value information in, and it will be logged as a json object with the json log output