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Introduction to Axon FrameWork with CQRS pattern
The document introduces the Axon Framework and its integration with the CQRS (Command Query Responsibility Segregation) architectural pattern, emphasizing its role in event-driven microservices and domain-driven design. It outlines the framework's components, including the domain model, dispatch model, and Axon Server, along with the importance of proper session etiquette during presentations. The CQRS principle promotes the separation of state updates and state queries in application development, enhancing scalability and flexibility.
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Introduction to Axon FrameWork with CQRS pattern
- 1. Presented By: AnshumanShukla Introduction to Axon Framework with CQRS Pattern.
- 2. Lack of etiquetteand manners is a huge turn off. KnolX Etiquettes Punctuality Join the session 5 minutes prior to the session start time. We start on time and conclude on time! Feedback Make sure to submit a constructive feedback for all sessions as it is very helpful for the presenter. Silent Mode Keep your mobile devices in silent mode, feel free to move out of session in case you need to attend an urgent call. Avoid Disturbance Avoid unwanted chit chat during the session.
- 3. Our Agenda 01 Whatis Axon Framework? 02 Axon Components 03 Axon Components Sub Parts 04 05 06 07 Standard Structure. 08 CQRS Architecture CQRS Command API Flow DEMO What is CQRS?
- 4. What is AxonFramework? Axon Framework is an Open-Source Framework for event driven microservices and domain-driven design.It is a Java Framework that gives developers access to repositories,implementations of crucial components including aggregates,command, and event buses,and implementations of the CQRS architectural pattern.Architectural principles like Domain Driven Design and CQRS are the foundation of the Framework.With this framework we can build incredibly Scalable and Flexible applications.
- 5. Axon Components 1.Axon Framework,DomainModel- A core framework that helps you build a domain centered on DDD,Event Sourcing and CQRS patterns. 2.Axon Framework,Dispatch Model- Logical infrastructure to support the domain model,that is, the routing and coordination of commands and queries that deal with the state of the Domain Model. 3.Axon Server- Physical Infrastructure to support the Domain/Dispatch Model.
- 6. Axon Components Domain ModelComponents Dispatch Model Axon Server Aggregates Commands/Command Handlers Events/Event Handlers Query Handlers Sagas Command Bus Query Bus Event Bus Sagas An Event Store based on H2(used for storage of configuration) and a file system(used for storage of event date) A Messaging Router for the Events flowing through the system.
- 7. What is CQRS? CQRSstands for Command and Query Responsibility Segregation.The Command/Query Responsibility Segregation principle is essentially an application development pattern that exhorts the segregation between operations that update state and operations that query state. Essentially, CQRS advocates usage of Commands to update the state of various application objects(Aggregate within a Bounded Context) Queries to query the state of the various application objects(Aggregate within a Bounded Context)
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- 9. Command API Command Command Handler EventsHandler Query API Query Query Handler Events Handler Event Store Write DB Read DB POST PUT DELETE PATCH GET CQRS Architecture Events
- 10. Controller Command GatewayAggregate Event Store Event Handler Repository /product/add POST send handles publishes listens CreateProductCommand CreateProductCommand ProductCreatedEvent DB CQRS Command API Flow
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