Hands-On Reactive Programming in Spring 5

How reactive repositories work

Now, let's dive into the details of how reactive repositories work. A reactive repository in Spring Data works by adapting underlying database driver capabilities. Underneath there could be a Reactive Streams-compliant driver or an asynchronous driver that could be wrapped into a reactive API. Here we are going to look how the reactive MongoDB repository uses the Reactive Streams-compliant MongoDB driver, as well as how the reactive Cassandra repository is built on the asynchronous driver.

First of all, the ReactiveMongoRepository interface extends more generic interfaces—ReactiveSortingRepository and ReactiveQueryByExampleExecutor. The ReactiveQueryByExampleExecutor interface allows the execution of queries ...