There is no need to limit the number of internal procedure calls.Įach microservice can be developed using a programming language and framework that best suits the problem that the microservice is designed to solve. Internal procedures (function calls) facilitate communication between the components of the application. The typical implementation uses REST API calls based on the HTTP protocol. To communicate with each other, the microservices of an application use the request-response communication model. The opportunity for reusing functionality across applications is limited. The clients could even be other applications. Microservices define APIs that expose their functionality to any client. The entire application is designed, developed, and deployed as a single unit. Each service supports a single business task. The application consists of loosely coupled services. Typically, each microservice runs in a container that provides a lightweight runtime environment. Also, a converged database brings the variety of data under one roof In addition, SaaS applications can take advantage of multi-tenancy in a Oracle offers database containers with multiple pluggableĭatabases that make it easy for microservices to isolate data for security, HA, and Consider using a separate persistent data store forĮach microservice. The data store layer provides a persistence mechanism, such as a database storageĮngine, log files, and so on.This layer can be written in a different language for each microservice. The logic layer focuses on a single business task, minimizing the dependencies on the other microservices.The API layer also enables the microservices to communicate with each other over HTTP, gRPC, and TCP/UDP. The API layer is the entry point for all the client requests to a microservice.This approach makes it easier to scale and maintain the application. Microservices follow the share-nothing model, and run as stateless processes. Microservices enable you to design your application as a collection of loosely coupled services. The following diagram shows the architecture of an application that consists of multiple microservices.ĭescription of the illustration microservice_architecture.png In a microservices architecture, each microservice owns a simple task, and communicates with the clients or with other microservices by using lightweight communication mechanisms such as REST API requests. If you want to design an application that is multilanguage, easily scalable, easy to maintain and deploy, highly available, and that minimizes failures, then use the microservices architecture to design and deploy a cloud application.
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