One Pager Cheat Sheet

• Event-driven architecture (EDA) and the publish/subscribe (pub/sub) messaging pattern provide real-time communication between distinct components without requiring them to be aware of each other, making it a popular choice for efficient application design.
• Event-Driven Architecture (EDA) is a software architectural paradigm that facilitates communication between distributed software systems through asynchronous and highly scalable events.
• In EDA, an event acts as the catalyst for communication between decoupled services.
• Generally, Pub/Sub (Publisher/Subscriber) is an event-driven architecture in which Publishers send messages over a Topic, and Subscribers receive messages related to their subscribed topics.
• A and B are both Event-Driven Architecture (EDA) models, where events are sent to topics and are subscribed to by either publishers or subscribers.
• The Pub/Sub architecture publishes a message to a topic, which is then forwarded to a subscription and pushed to a subscriber, who sends an acknowledgment back before the message is removed from the queue.
• The Broadcast Pattern sends the same message to all participants, while the Polling Pattern regularly contacts the sender to check for updates, but may waste time or cause people to miss information.
• The Polling Pattern is a method for a subscriber to request information from a central source at set intervals in order to make sure the content is up-to-date.
• Pub/Sub technology enables real-time event-driven applications to make proactive decisions based on the most up-to-date data streams from various industries, such as Healthcare, Banking, Online Shopping, and Internet of Things.
• Event-driven design (EDA) allows for rapid development with agility and cost reduction, as well as ease of auditability, making it a highly attractive software architecture.
• Event-driven architectures provide many advantages and require an effective integration strategy for success.