When working with JSON in Java, Jackson’s JsonNode tree model is a popular choice — especially in framework code that processes or transforms data. But what if you want to query that tree using flexible JsonPath expressions?

Jayway JsonPath is a powerful tool, but using it with pre-parsed Jackson trees isn’t as obvious as you’d think — especially when you’re aiming for safe, predictable behavior in production.

In this post, I’ll share a few techniques I found helpful for reliably applying JsonPath to JsonNode trees, making your queries safer, clearer, and better suited to framework-level code.

With microservices architectures, one key question is where should the boundaries be. Is every entity a separate service? And how fine-grained should service architectural divisions be? We can offer some simple rules of thumb.

Two weeks in Gurgaon engaging with and mentoring the Indian team. An amazing & vibrant country.