Overjax: um framework para facilitar o desenvolvimento de microservices

Abstract

Every application has the objective of solving a certain problem or a set of them, but to solve it it is necessary to do much more than to create entities and business rules. The design of an application requires several configurations and implementations that are not linked to the main problem, such as error handling, standardization and abstraction layers. This work presents the development of a project that aims to reduce the time of development and maintenance of a microservice in the Java language, through the combination of specifications consolidated in the market, new features and the definition of configuration patterns, instead of explicit configuration . As a result a framework was obtained, which besides facilitating this initial configuration, has several features that can be used by the entire application. These include standardized implementations of request response format, global Java EL context creation per request, internationalized message interpolator using Java EL, exception handlers, dynamic internationalized message builders, implementation of security filters for authentication and generic authorization that supports any type of authentication, stateless, that use the HTTP Authorization header, creation of integration with the Keycloak access identity manager, allowing single login with low coupling through JWT tokens. With the intention of validating the framework was developed a simple test application named any-address, that use the Overjax features.