Převod monolitické aplikace na architekturu mikroslužeb

This diploma thesis describes the conversion of an existing monolithic application into micro-service architecture. The technologies used are Java 8 and Spring Framework, which uses Spring Boot for faster configuration. The main reason for changing architecture is to use the application as the basis for most corporate programs to avoid duplicating features that are already supported by the application. Expanding the monolithic application would be chal-lenging because the source code would be too interlinked, and it would not be possible to replace one part without affecting the other.At first, the advantages and disadvantages of monolithic applications and microservices are compared, microservices are characterized and the ways of communication between them are described. The theoretical part of the thesis is completed by the summary of possibilities of application virtualization. In the practical part of the thesis, the author first describes how to divide the application, when packages in the original monolithic application are the key for partitioning. Further, the author describes a new breakdown from the viewpoint of Maven projects and from the point of view of microservices that use three-tier architecture. For communication between microservices, the system of commands and communicators is defined. The thesis describes configuration of web server, database connection and application security. Administrator's Guide is also included, and it shows how to create a virtual server in the form of a Linux container and how to install the tools needed for preparation and running the application. The last part of the thesis is a user guide that contains screen previews along with examples of the most common usage scenarios.Source code of the converted application that uses the microservice architecture is attached.