Using the mongod command, we will start the locally installed MongoDB and then using the following command, we will start the project we just created:

mvn spring-boot:run

Head over to postman and call the URL http://localhost:8080/movies (GET). You will see an array with zero elements in it. Now, call the URL http://localhost:8080/movies (POST), with the following JSON in the body:

{
   "id": 1,
   "title": "testtitle",
   "genre": "thriller"
}

You will get a 200 OK status, and should see the newly created JSON as a response. Now, if you run the GET request on movies endpoint, you should see the newly created Movie as a response.

Here, we implemented CRUD in our Movie model by using MongoDB as a persistence store in a reactive programming paradigm.