Connecting to your MongoDB Database

You'll need your connection string from your MongoDB Cluster:

spring.data.mongodb.uri=mongodb+srv://<user>:<password>@<Cluster>/?retryWrites=true&w=majority
spring.data.mongodb.database=sample_training

From here, Spring Data MongoDB is ready to connect to our database.

You can see in our Connection.java how we setup a MongoClient using these details.

    public static void main(String[] args) {
        String connectionString = System.getProperty("mongodb.uri");
        try (MongoClient mongoClient = MongoClients.create(connectionString)) {
            System.out.println("=> Connection successful: " + preFlightChecks(mongoClient));
            System.out.println("=> Print list of databases:");
            List<Document> databases = mongoClient.listDatabases().into(new ArrayList<>());
            databases.forEach(db -> System.out.println(db.toJson()));
        }
    }

But with Spring Data MongoDB, we don't need to run any of this. It is all taken care under the hood.