How does communication occur between the Mendix Runtime and Database Server?

The communication between the Mendix Runtime and the Database Server occurs primarily through JDBC (Java Database Connectivity). JDBC provides a standard interface for connecting and executing queries with databases in Java applications. In the context of Mendix, it allows the Runtime to perform operations such as executing SQL commands, retrieving data, and updating records directly in the database.

This approach enables Mendix to maintain an efficient and consistent method for accessing relational databases, ensuring that data transactions are handled effectively. JDBC abstracts the complexities of database interaction, allowing developers to work with higher-level constructs in their Mendix applications without needing to manage the low-level details of database communication.

While other methods like HTTP requests, REST APIs, and XML-RPC are commonly used in different contexts for web services or application integration, they are not the primary means of communication between the Mendix Runtime and the Database Server. Instead, those methods focus on different aspects of application interaction, such as web services and remote procedure calls, rather than direct database communication. Therefore, JDBC is the correct answer for how the Mendix Runtime connects and communicates with its underlying database.