One of the missing elements while using MongoDB is lack of the auto-increment fields, commonly called sequences (e.g. in PostgreSQL). For MongoDB Atlas (managed MongoDB solution) there is a posibility to mimic this feature using database triggers (as mentioned on MongoDB page).

Last week we found out that in some cases our application is showing redundant data on error - for example stacktrace. It happens when there was an error which was handled by the application container which was Jetty. For example, sending a header like X-FORWARDED-PORT: some-not-numeric-value causes NumberFormatException and shows a full stacktrace.

While working on webapp API in Java I need to send the app version and the build date to the frontend. But how to make this?

As my API build is based on maven I thought about getting version from pom.xml file. So, let’s make it this way!

Yep, that’s another story of “always check if serialising and de-serialising works as expected”. And some kind of reminder for future-me if I forgot about this! ;-)

Session of logged users seems to be a pretty easy topic, yep? For sure it is! What if you want to share that session between different instances of your app? That seems quite easy too - let’s store it in a database and you’re good to go.