Programmatically set SpringBoot Datasource - spring-boot

Question

I need to set two Datasources for my SpringBoot Application. Currently, the single Datasource working solution to deal (successfully) with timeouts on MariaDB server sets the following three parameters in application.properties
# Keep the connection alive if idle for a long time (needed in production)
spring.datasource.testWhileIdle = true
spring.datasource.timeBetweenEvictionRunsMillis = 60000
spring.datasource.validationQuery = SELECT 1
Various examples that I have checked using Java-based, Datasource configuration are in general as follows:
#Primary
#Bean
public DataSource userDataSource() {
DriverManagerDataSource dataSource
= new DriverManagerDataSource();
dataSource.setDriverClassName(
env.getProperty("jdbc.driverClassName"));
dataSource.setUrl(env.getProperty("user.jdbc.url"));
dataSource.setUsername(env.getProperty("jdbc.user"));
dataSource.setPassword(env.getProperty("jdbc.pass"));
return dataSource;
}
The problem is that I don't know how to set testWhileIdle and validationQuery using the Datasource class since there are no respective methods and I don't see in MariaDB documentation any related option that can be passed as part of the JDBC URL.

Answer 1

If you are using Spring Boot with Tomcat then it will use org.apache.commons.dbcp.BasicDataSource not DriverManagerDataSource. Change your dataSource method to return a BasicDataSource which has methods to set testWhileIdle and validationQuery.
#Primary
#Bean
public DataSource userDataSource() {
BasicDataSource dataSource
= new BasicDataSource();
dataSource.setDriverClassName(
env.getProperty("jdbc.driverClassName"));
dataSource.setUrl(env.getProperty("user.jdbc.url"));
dataSource.setUsername(env.getProperty("jdbc.user"));
dataSource.setPassword(env.getProperty("jdbc.pass"));
dataSource.setTestWhileIdle(env.getProperty("jdbc.testWhileIdle"));
dataSource.setValidationQuery(env.getProperty("jdbc.validationQuery"));
return dataSource;
}

Answer 2

...
import org.springframework.boot.autoconfigure.jdbc.DataSourceBuilder;
...
#Primary
#Bean
public DataSource dataSource() {
DataSourceBuilder factory = DataSourceBuilder
.create()
.url(...)
.username(...)
.password(...)
.driverClassName(...);
return factory.build();
}
...