Performance of Fetching Data with JPQL
Jakarta Persistence API (formerly Java Persistence API) is a standard approach to access a database in the Java world. Even though its usage is simple, developers sometimes struggle to achieve best performance. In this blog post, I’m going to showcase different JPQL techniques in fetching aggregated data along with their execution times.
How to Detect Long Running Queries in Hibernate?
Most Java applications use Jakarta Persistence API (formerly Java Persistence API) to access databases. Hibernate is the most popular ORM framework for Java. It is a straightforward and easy-to-use implementation of JPA. However, its simplicity of usage often becomes mischievous to developers and leads to serious performance issues in Hibernate-based applications. How to detect such issues? The answer might lay in smart logging.
How to Map PostgreSQL BIT with Hibernate
Unfortunately, Jakarta Persistence API (formerly Java Persistence API aka JPA) does not support BIT having a parametrised length. Fortunately, hibernate (one of the implementation of JPA) supports custom types, thus you can define your own BIT type with a parametrised length.
Hashcat to Crack JWT
Introduction
In this article, I’m going to explain what hashcat is and how you can use it to crack an HS256 JSON Web Token using a brute-force attack.
With a weak JWT, your applications become vulnerable to identity theft as a hacker can impersonate any user he wants once the JWT is cracked and the HS256 secret is revealed.
Moving to Oracle Cloud
It’s time to move to a new environment! I’m happy to announce that as of today, my security demos will be available 24/7 in Oracle Cloud! 🙂
How did I start my hacker’s guide demos? When did it start? And how have I moved to Oracle Cloud?