Application start

The java application is based on Maven and needs a running MongoDB instance on default port. This can be achieved by running the provided docker-compose yml.

docker-compose -f docker/docker-compose.yml up

Afterwards you are good to go.

Architectural approach

The basic approach of the application is a HTTP server written without additional frameworks and using only the standard JDK.

The two functions of the HTTP server are access to the file system and the storage and retrieval of data within a MongoDB. The architecture is based on a hexagonal approach so that a meaningful separation can take place between the respective components of the application.

This approach results in a meaningful division for the understanding of the application as well as for the testability of individual components.

In the future, logic implemented with this architectural approach could be used within new communication endpoints in a renewed way. The respective accesses to the used persistence layers are therefore reusable and adapters (REST endpoint, message queue) do not contain closely coupled application logic.

Procedural approach

For the processing of the HTTP connection the approach is shown in a BPMN diagram. At this point the respective use of a cache validation is also illustrated.

Caching

Keep Alive

The approach to the low-level http connection handling is based on the tutorial by @ssaurel