Event sourcing is an architectural software pattern that's useful to design complex and distributed systems, particularly those that run many processes concurrently. The pattern captures and stores ...

The Observable design pattern is used in many important Java APIs. One well-known example is a JButton that uses the ActionListener API to execute an action. In this example, we have an ActionListener ...

One of our biggest challenges as software developers is organizing our code so that it is easier to extend and maintain. The Command pattern helps us do that by encapsulating all the data required to ...