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.
PostgreSQL is a great database. It can do just about anything. But one area that has surprising gaps is case insensitive search. Surely, having the benefit of thirty years of database research, users can search for a customer without knowing the exact capitalization of their name? Turns out it’s not so easy..
Read on to find out how to implement this in EF Core.
PostgreSQL major versions are incompatible as to data format stored on disk. There is a pg_upgrade tool available but instructions for Windows aren’t directly usable. Aren Cambre fills this gap with accurate working instructions to use pg_upgrade on Windows.
Recently I had reason to investigate a reported vulnerability in the YUI 2 library. CVE-2022-48197 claimed cross-site scripting in the TreeView component, but provided very little detail. Was this a real security issue?
Here’s a puzzle. Does a “wrapped URL” refer to the wrapped result, or the original URL input that was wrapped?
Language is our tool, but occasionally we can get confused or go in circles over semantics. Find the story of this brain-bender, and how we clarified it, here.
This is an often-asked question on the Internet — and one which, previously, had no good answer. Now, thanks to @Jianrong Chen, we have a one-liner configuration to do it!
Queues offer a promise of reliability for integrating applications, but can cause more subtle operational risks.
Queues exhibit ‘bi-modal behavior’ — low latency when everything is working well, but can rapidly form large backlogs when a failure occurs. This can dramatically increase the recovery time from outages.
Amazon offer an extremely interesting article about the reliability of queuing, with strategies to limit and manage backlogging.
How often have you found commit messages in your Git history to be uninformative? Or alternatively, wordy rambles that are slow to read — and may well not have the information you need anyway?
Headline + Bullet Points is an approach I’ve found to make Git commit messages informative and fast to write.