Design Patterns and Best Practices in Java

Event-driven communication pattern

Event-driven communication is when two or more components message each other based on some event. An event can be adding new data, updating the data state, or removing data. For example, on addition of a new employee record to the system, an email needs to be sent to the manager. So the service or component responsible for managing employee records will message the component responsible for the emailing functionality on addition of a new record. There are multiple ways to handle this communication, but the most common method is through Message queues. The event-triggering component adds a message to the queue, and the receiver reads this message and performs its part of the action: in this case, sending ...