When should you use an event sourcing solution?

July 10, 2023

Tags: Technologies

event sourcing


An event source solution, which will be discussed at our annual event, may be just what a firm requires to effectively handle all application status changes and turn each of these into an event.


Event sourcing is a software design pattern that focuses on recording and preserving any changes to the state of an application as a series of events. This is especially helpful if the database breaks or you need to go over the history of modifications and operations.



event sourcing


What exactly is an event?


The term "event" refers to an occurrence or activity that occurs within an application or system. An event is any remarkable occurrence that prompts a response or a change in the state of the system or application.


The concept of events is central to event-driven architecture, in which software systems are intended to respond to events and communicate with one another by sending and receiving events. Web development, server applications, desktop software, and mobile applications are all examples of event-driven systems in use.


Events can be generated by a variety of sources, including user activities, system processes, other systems, and even internal program triggers. Button clicks, mouse movements, keyboard input, database updates, network requests, sensor data changes, and many other events are examples of events.


event sourcing


When is it appropriate to use an event sourcing solution?


Here are some examples of when an event sourcing system can be useful:


Compliance and auditing


Event sourcing can be useful if you need to preserve a thorough audit record of all changes made to your system. You can create a thorough history for auditing, compliance, and forensic applications by capturing events that indicate each state change.


Status of reconstruction


In some contexts, it may be required to rebuild an application's current state by replaying prior events. You can reconstruct state using event sourcing by applying events in the order they happened. This can be useful in cases requiring complex business logic or historical analysis.


Systems that work together


Event sourcing can provide a strong solution in collaborative applications where numerous users can simultaneously alter shared data. By recording and storing events, you may handle and resolve conflicts depending on event order, enabling collaborative editing and assuring data consistency.


event sourcing


Integration of systems


Event sourcing can improve communication and data synchronization by linking multiple systems or microservices. Each system can publish events associated with its own state changes, allowing other systems to subscribe and respond appropriately. This decouples the systems while also providing a dependable mechanism for event-based communication.


Architectures Based on Events


Event sourcing is compatible with event-driven architectures, in which different components communicate via events. You can achieve a single source of truth for events by implementing event sourcing, which enables reliable event processing, event-driven workflows, and event-based system coordination.


CQRS stands for Command Query Responsibility Segregation


The CQRS pattern is frequently used in conjunction with event sourcing. CQRS separates read and write activities, and event sourcing can be used to gather events and update application state on the write side. Scalability, flexibility, and support for complicated business operations can be provided by this combination.


It is crucial to notice that event source adds complexity and new considerations, such as event storage, replay, and versioning. As a result, it is critical to thoroughly consider the trade-offs and determine whether the benefits of event sourcing coincide with your specific needs and domain.


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