show-sql writes to System.out, Hibernate’s bind logging prints every value in clear, an OpenTelemetry collector cannot erase what it receives, and a file appender quietly sets a one-year retention. The leaks no code review sees, and how to own the one switch you deliberately keep.
GDPR-compliant logging in Spring Boot, part 2: a build-time test that fails on personal data in log statements
A logging rule that lives in a wiki holds only where its author was looking. How we turned it into a JUnit test that scans every module’s sources, why it must prove it scanned something, and why we why we decided against runtime log masking.
GDPR-compliant logging in Spring Boot, part 1: what must never reach a log line
A record’s toString(), an exception message your global handler logs, an e-mail as the actor: the three leaks that put personal data into almost every Spring API’s logs, and what to write instead.
Deterministic Pagination in Spring Boot: a Tie-Breaker for Pageable Sorting
Why paging over a non-unique sort key returns duplicated or missing rows, and a reusable way to append a unique tie-breaker to every Spring Data sort.
Spring Boot and Elasticsearch: Resilient Indexing with a Buffer Table and a Scheduler
How we send application events to Elasticsearch from Spring Boot through a buffer table and a scheduled, cluster-safe job, so an Elasticsearch outage never fails a business transaction.
Configure Swagger UI in a Spring Boot Application with springdoc-openapi (Spring Boot 2.7, 3 and 4)
A practical springdoc-openapi setup, shown twice where it differs: once for Spring Boot 2.7 (springdoc 1.x, javax) and once for Spring Boot 3 and 4 (springdoc 2.x / 3.x, jakarta). Dependencies, metadata, a working Authorize button for JWT, reverse proxies, error responses and what to switch off in production.
ViewCriteria issue when using more than once attribute with LOV based on switcher (Oracle JDeveloper 12.2.1.0)
Almost a year ago I wrote this post about a ViewCriteria issue when using the same attribute twice in Oracle JDeveloper 12.1.3.0. Now I came across another issue with ViewCriteria, in Oracle JDeveloper 12.2.1.0 this time, again related with a multiple insertion of an attribute but with a more complex scenario this time. Consider having an attribute with applied LOV that …
Deck Transition changes Checkbox’s value (Oracle Jdeveloper 12.1.3.0)
A really nice new feature introduced in ADF 12c is the deck ui component. Two helpful examples on how to use this component are the following: How to use the Deck component (ADF 12.1.3 New Feature) from Andreas Koop Using af:deck component to animate content in ADF 12c(12.1.3) from Ashish Awasthi You can find some more examples over the internet but …
ViewCriteria issue when using same attribute twice (Oracle JDeveloper 12.1.3.0)
Some days ago, in an Oracle MAF technical workshop, I witnessed one of those awkward moments when you are certain that something should work correctly in a presentation but it didn’t. While showing us some basic functionality in Oracle ADF 12c, the instructor implemented a simple query using ViewCriteria. He used an OR conjunction but the query seemed to react …




