Is My BasicDataSource Implementation Truly Using JDBC Connection Pooling?

Am I Using JDBC Connection Pooling?

Question:

I have implemented a connection class using BasicDataSource in my Java application. Is this considered true connection pooling?

Answer:

Yes, you are using a connection pool with BasicDataSource, which is a component of Apache Commons DBCP. However, you are inadvertently creating multiple connection pools with your current implementation, as a new pool is created with each call to getConnection().

To establish proper connection pooling, you should create the connection pool only once, typically during application startup. This pool should then be used to acquire and release connections throughout the application's execution.

Revised Code:

Here is a revised version of your code that effectively uses connection pooling:

public final class Database {

    private static final BasicDataSource dataSource = new BasicDataSource();

    static {
        dataSource.setDriverClassName("com.mysql.jdbc.Driver");
        dataSource.setUrl("jdbc:mysql://localhost:3306/data");
        dataSource.setUsername("USERNAME");
        dataSource.setPassword("PASSWORD");
    }

    private Database() {
        //
    }

    public static Connection getConnection() throws SQLException {
        return dataSource.getConnection();
    }

}

Improved Connection Usage:

In your application code, you should use a try-with-resources block to ensure that resources like connections, statements, and result sets are properly closed, even in the event of exceptions:

try (
    Connection connection = Database.getConnection();
    PreparedStatement statement = connection.prepareStatement(SQL_EXIST);
) {
    // ...
}

Conclusion:

By implementing these revisions, you will establish true connection pooling in your Java application, optimizing its performance by avoiding the overhead of creating multiple connections.

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