Find Your Business Domains to Start Refactoring Monolithic Applications
This article serves as an introduction to AWS Domain-Driven Design. It explains how to recognise business domains in old monolithic programmes and how to break them into a group of microservices. Starting your microservices with a Domain-Driven Design will help you reap the benefits of cloud scale in your freshly refactored application. AWS has announced that AWS Migration Hub – Refactor Spaces is now generally available. This functionality enables you to use the strangler fig pattern to run legacy and refactored applications across different AWS accounts using the strangler fig pattern.
Digital technology has made our world more transparent and interconnected, posing new challenges and opportunities for every business. A holistic, user-centric perspective is what truly sets one apart.
Advantages of microservices
- increased business and technical agility.
- increased scalability
- increased resiliency
Domain Driven Design
Domain Driven Design principles can be used to break down a monolith into business subdomains. Domain Driven Design aids in ensuring that the product produced meets established business goals and, as a result, the needs of your end consumers. Event storming and context mapping are two techniques that can be used to determine domains and how they relate to the services you’ve established. You can start adopting the new cloud-optimized microservices architecture once you’ve established your subdomains.
The Strangler Fig pattern can be used with AWS Migration Hub Modify Spaces to iteratively refactor the monolith into new microservices. This allows you to continue to use the present application while it is being developed, and incrementally route traffic to new services as they are developed.
Domain Driven Design necessitates a thorough grasp of the company’s operations. Both the business specialists and the technical implementers must devote time and effort. In cases where ‘fast wins’ are required, Domain Driven Design should not be applied. Instead of supporting domains, utilise Domain Driven Design for software that supports the primary business domain. A session of event storming can help you get started with Domain Driven Design. However, as previously stated, this is a worthwhile effort. It will enable you to create software that is more closely aligned with the requirements of your end users. This also aids in the creation of decoupled services that are easier to scale and manage. The combination of these outcomes and enhanced company agility is a winning mix.
Event Storming and Bounded Contexts
Event storming is a common workshop format for aligning business and technical teams on what a solution should deliver. This is accomplished without being sidetracked by the details of how it will be carried out. As a result, teams may take longer to begin releasing source code. However, there will be more alignment across all teams in terms of what each microservice should be responsible for. Stakeholders speak a ‘universal language’ as a result of event storming, thus there is no confusion about what the solution should do.
The event storming workshop is a brainstorming session. During this session, all of the solution’s stakeholders collaborate to discover business events that are associated with domains. A consumer applying for a new account is an example of a business event in the banking industry. The group will begin identifying the entity that generated the event, the procedures that must occur as a result, and any additional events that are triggered as a result of the source event during the workshop.
Incremental Refactoring to Microservices
The next concern is how to manage which requests are routed to the monolith or delivered to new microservices after you’ve dissected your monolith. With the availability of AWS Migration Hub Refactor Spaces, this work becomes much easier. You can configure an application proxy to both legacy and refactored services in your AWS Refactor Spaces Environment. The default service will be the endpoint of the monolithic application at first. This is done to ensure that traffic is sent to the traditional application until the new microservices are ready. You can add a service and a route for a microservice to the Refactor Spaces application once it’s ready to use. This is accomplished by insulating your end users from infrastructure and application changes.
