Event-driven architecture
Event-driven architecture is a pattern where components and services within an application communicate through the generation and processing of events. In AWS Lambda, a Lambda function is triggered in response to an event, concurrently processing it and invoking other services as needed. This enables users to build loosely-coupled, scalable, and efficient systems by decoupling event-producing services from event-consuming services.
Guide to Event-driven Architecture in AWS Lambda
What is Event-driven Architecture?
Event-driven Architecture is a software architecture pattern promoting the production, detection, consumption of, and reaction to events. An event can be defined as a change in state, or an update, such as an item being placed in a shopping cart on an e-commerce website.
Importance of Event-driven Architecture:
This architecture enhances the scalability, responsiveness, and understandability of applications. It facilitates effective decoupling of applications components, which improves scalability and fault tolerance.
How it works:
In an event-driven system, when a state change or event happens, a message gets delivered to the event processor. The processor reacts to the message by triggering additional processing or updating other parts of the system depending on the event. This processing might include updating databases, performing calculations, or sending notifications.
Exam Tips: Answering Questions on Event-driven architecture
Understand core concepts deeply. Make sure to be familiar with the various components and how they interact with each other. Know common use cases of event-driven architecture, remember to look for clues in the questions that point towards event-driven architecture. Answer concisely and accurately, often the most direct answer is the best one.
Preparation:
Revision of concepts and hands-on exercises is fundamental. Practice with real-world examples to solidify understanding and application of concepts.
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