Generate a pdf report using jasper reports

HTML reports generated with freemarker templates

Scatter Gather enterprise integration pattern implementation

Spring Boot QueryDSL lets you query the database using domain specific language similar to SQL.

Spring integration with Vault.

Spring cloud sleuth helps you trace a request and zipkin server help you trace in a distributed environment.

Spring Boot with RabbitMQ message broker that implements Advanced Message Queuing Protocol(AMQP)

Java based implementation of a state machine & spring library based implementation of state machine.

Producer consumer problem implementations

The N+1 query problem occurs when the framework executes N additional SQL statements to fetch the same data that could have been retrieved when executing the primary SQL query.