Hello everyone,

Six months have passed since the last article about Java 24 and Java 25 - and Java continues to tick along at the usual six-month interval. Java 26 was released on March 17, 2026, the first release after the LTS milestone Java 25. No long-term support this time, but again a package …

The third part of our series was about If-Match and how you can use it to prevent lost updates for PUT and PATCH - two clients process the same resource, the server detects the collision based on the ETag and rejects the stale write access. One question remained unanswered: What about POST? When …

The second part of our series was about caching headers - and in the pro tip about strong vs. weak ETags we briefly teased that strong ETags have a second job: They protect you from lost updates when writing. That’s exactly what today is about.