PinnedPaul Bares·Feb 8, 2021Authenticate users in your webapp with Azure Active Directory as IDP and Keycloak as SPLearn how to use Keycloak to authenticate users in a javascript client application and delegate authentication to Azure Active Directory…
Paul Bares·Oct 16, 2025Fowl Play: I ditched Java’s Sort for DuckDB’s because it’s quackerBehind this provocative title lies an amusing experiment that aims to compare the performance of the sorting operation in Java versus…
Paul Bares·Sep 18, 2023How to identify rows added by GROUP BY ROLLUP?Using rollup in SQL queries allows you to include extra rows that represent the subtotals.
Paul Bares·Sep 3, 2023Simulate Partial Rollup with Rollup and Grouping SetsNot all SQL databases support the Partial Rollup SQL syntax. For the record, Partial Rollup reduces the number of subtotals produced by the…
Paul Bares·Sep 20, 2022Authenticate as an end user a Spring Boot app for access to the BigQuery APIThis guide explains how web server applications written with Spring Boot can use Google OAuth 2.0 endpoints to implement OAuth 2.0…
Paul Bares·Oct 20, 2021How fast can you read a large csv file and compute min, max, average aggregation out of it (Part 2)This is the second part of the series “How fast can you compute the average, min and max of values read from a very large csv file”
Paul Bares·Oct 20, 2021How fast can you read a large csv file and compute min, max, average aggregation out of it (Part 1)Reading files is a common problem every developer has to solve once in his life. Providing a quick solution is easy but an effective one?A response icon1A response icon1
Paul Bares·May 27, 2021How to get access token from Keycloak using Postman — OAuth2Here’s how to setup Postman to authenticate on Keycloak using a public client and the Authorization Code grant type.A response icon2A response icon2
Paul Bares·Aug 16, 2020Why Double-Checked Locking is STILL BrokenThis story is a follow-up of this article https://www.cs.umd.edu/~pugh/java/memoryModel/DoubleCheckedLocking.html (DCL) signed by famous…
