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Event Sourcing

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May 1, 2024 Updated June 22, 2025 20 minute read
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Navigating the World of Event Sourcing

Event Sourcing is an architectural pattern that captures all changes to an application's state as an immutable sequence of events. Instead of storing just the current state of data (like in a traditional database), an event-sourced system records every action or change that has occurred. This sequence of events becomes the definitive record, allowing the system to reconstruct the state of an entity at any point in time by replaying these events. This approach can be likened to an accountant's ledger: every transaction (event) is recorded, and the current balance (state) is derived by summing up all transactions.

Path to Event Sourcing

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We've curated two courses to help you on your path to Event Sourcing. Use these to develop your skills, build background knowledge, and put what you learn to practice.
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Reading list

We've selected seven books that we think will supplement your learning. Use these to develop background knowledge, enrich your coursework, and gain a deeper understanding of the topics covered in Event Sourcing.
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Patterns of Enterprise Application Architecture
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A thorough guide that introduces the concepts of Event Sourcing and demonstrates how to implement it in real-world applications. It provides a practical understanding of the benefits and challenges of Event Sourcing.
Patterns of Enterprise Application Architecture
Hardcover
$$$
Patterns of Enterprise Application Architecture []...
Hardcover
$$$$
Patterns of Enterprise Application Architecture...
Kindle Edition
$$$
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Building Event-Driven Microservices
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A practical guide to designing and implementing event-driven microservices with a focus on real-world scenarios. provides step-by-step instructions on how to use Event Sourcing to build scalable and resilient distributed systems.
Building Event-Driven Microservices: Leveraging...
Paperback
$$
Building Event-Driven Microservices: Leveraging...
Kindle Edition
$$
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Enterprise Integration Patterns
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A comprehensive guide to event-driven programming, including a section on Event Sourcing. provides a deep understanding of the principles and patterns involved in building reactive and scalable event-driven systems.
Enterprise Integration Patterns: Designing,...
Hardcover
$$$
Enterprise Integration Patterns: Designing,...
Kindle Edition
$$$
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Implementing Domain-Driven Design
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A comprehensive guide to implementing Domain-Driven Design (DDD) in real-world applications. Event Sourcing is discussed as an essential aspect of DDD and its role in building flexible and maintainable software.
Implementing Domain-Driven Design
Hardcover
$$
Implementing Domain-Driven Design
Kindle Edition
$$
Related topics
Event Sourcing
Microservices
Reactive Programming
CQRS
Event-Driven Architecture
Domain Driven Design
Message Queues
Cloud Computing
Distributed Systems
Microservices Architecture
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