The surging popularity of microservices is due to multiple reasons. First of all, microservices strictly follow the single responsibility principle. That is, microservices do things one at a time but do it well. The MSA pattern mandates that different responsibilities need to be placed in different services. These fine-grained and self-contained microservices offer a number of unique benefits. The cost of developing, changing, and advancing is cheap, and the time to market is minimal. Each service runs in its own process space and is being stuffed with its own data store. Every service has to be bestowed with an easy-to-understand and should use APIs. RESTful APIs are the most popular for API-enabled microservices. The services talk to one another through API calls. To craft and sustain business-critical and enterprise-grade applications, multiple microservices have to be blended together. Microservices are modular (loosely coupled and highly cohesive). The lightly- or loosely-coupled microservices do away the dependency-associated risks and drawbacks. On the other hand, the closely-related responsibilities of a software module are kept together.
Each microservice implements a distinct business functionality and hence has a small code base. Therefore, it's easy and quick for service developers to bring in any desired changes. Also, microservices facilitate simplified and streamlined software design. Microservices can also be given to testers and users for initial verification and validation.
Microservices fulfill the varied goals of the agile design and development of software applications. Further on, as we've discussed legacy modernization in another chapter of this book, microservices emerge as the best fit for modernizing and migrating large, monolithic applications. Microservices easily leverage all of the innate competencies of cloud environments to produce and sustain next-generation applications, which are mandated to be agile, adaptive, and adroit.
Furthermore, the nimbleness, simplicity, and astuteness of microservices elevates them to be the most competent unit to build and deploy business-critical workloads. Also, because of its small size, there's a lower likelihood of introducing errors into the source code and it's easy to troubleshoot microservices and their combinations. Hence, there are a number of businesses, technical and user advantages of microservices architecture. Experts continuously publish a variety of best practices to leverage the unique capabilities of MSA in a highly beneficial manner. As software applications are becoming more integrated and hence complicated, the soothing experience of MSA is helpful in delegating the development, deployment, and operational complexities. MSA, if used intelligently, offers a litany of strategic advantages; the noteworthy ones include the agile design of applications, the support for both cloud-enabled and native software applications, and the enabling of the separation of concerns.