Reactor Developer Tools

The tools covered so far are specific to Spring Boot. But since we’ve embraced Project Reactor, we don’t want to pass up their tools, either.

Debugging Reactor flows

When something goes wrong in a Reactor flow, what can we do? Can we inspect the stack trace?

What do we think we’ll get when printing out a stack trace? Perhaps something based on the assembly, or something based on the subscription?

When writing Reactor code, the series of operations we lay out in our application can be a recipe for what will happen. In the documentation, this is referred to as assembly. It’s like putting together a bunch of command objects using lambda functions and method handles. The assembly of our recipe may occur in a single thread.