Why do i get a null DataSource when running this code using HikariCP?

Question

I'm running this code to set my config and get a DataSource to access a database but when i call ds.getDataSource() i get a null value. What am i missing there?

    private static HikariConfig config = new HikariConfig();
    private static HikariDataSource ds;

    static {
        config.setJdbcUrl("jdbc:mysql://localhost:5656/...");
        config.setUsername("");
        config.setPassword("");
        config.addDataSourceProperty("cachePrepStmts", "true");
        config.addDataSourceProperty("prepStmtCacheSize", "250");
        config.addDataSourceProperty("prepStmtCacheSqlLimit", "2048");
        config.setMaximumPoolSize(10);
        config.setConnectionTimeout(30000);
        config.setIdleTimeout(600000);
        config.setMaxLifetime(1800000);
        ds = new HikariDataSource(config);
    }

    public static DataSource getDataSource() {
        return ds.getDataSource();
    }

Answer 1

Ok so i wasn't familiar with this aspect of SpringBoot, for anyone having the same problem here is what i did to make the @Autowired work:

I need to use the DataSource in my a QuickSearchService class which i defined as a @Service. In that service i can call the HikariCP DataSource with @Autowired:

@Service
public class QuickSearchService{

@Autowired
private DataSource ds;

...
    
}

Then when i needed to use the service i @Autowired it aswell on call:

public class UsingService {

@Autowired
private QuickSearchService qss;

...

}

Finaly i had to use @ComponentScan on the application main class to tell the server to find the components that need to be autowired:

@ComponentScan(basePackages = {"example.services", ...})
public class DemoApplication {

public static void main(String[] args){
...
}

}

Then i can configure the DataSource in the application.properties.