Introduction to Message-Driven Beans
A MDB (Message-Driven Bean) is a bean used by JMS to listen to new asynchronous messages. In the same way as any other Java EE enterprise bean, the EJB container in which the MD...
JPA. Introduction to Java Persistence API
The Java Persistence API (JPA) is a specification for managing relational data and performing CRUD operations. It is not an implementation: Hibernate is the most widely used pro...
EJB. What it is, Why it Exists and How it Works
EJB (Enterprise Java Beans) is part of the Java EE (previously called J2EE and Jakarta EE since 2018) specification and allows you to modularize your application by enabling com...
The Big O Notation
O-notation (pronounced big-oh notation) is a way of describing the performance of an algorithm and provides an upper bound or worst case on a function. Using O-notation you can ...