Spring boot 3.5.0: DataSourceProperties not defined

Question

I used spring boot 3.4.6 before and everything worked fine for my database configuration but now I have an error when I want to use spring boot 3.5.0:

Description:

Parameter 0 of method hikariDataSource in xxx.DatabaseConfiguration required a bean of type 'org.springframework.boot.autoconfigure.jdbc.DataSourceProperties' that could not be found.


Action:

Consider defining a bean of type 'org.springframework.boot.autoconfigure.jdbc.DataSourceProperties' in your configuration.

Indeed, to use LazyConnectionDataSourceProxy I did this configuration:

In application class, I deactivate the auto configuration:

@EnableAutoConfiguration(exclude = { DataSourceAutoConfiguration.class })

I define my own configuration:

@Configuration
public class DatabaseConfiguration {
    @Bean
    @ConfigurationProperties(prefix = "spring.datasource.hikari")
    public HikariDataSource hikariDataSource(DataSourceProperties properties) {
        HikariDataSource hikariDataSource = createDataSource(properties, HikariDataSource.class);
        if (StringUtils.hasText(properties.getName())) {
            hikariDataSource.setPoolName(properties.getName());
        }
        return hikariDataSource;
    }

    protected static <T> T createDataSource(DataSourceProperties properties, Class<? extends DataSource> type) {
        return (T) properties.initializeDataSourceBuilder().type(type).build();
    }

    @Primary
    @Bean
    public DataSource dataSource(HikariDataSource hikariDataSource) {
        // Wrap hikariDataSource in a LazyConnectionDataSourceProxy
        LazyConnectionDataSourceProxy lazyDataSource = new LazyConnectionDataSourceProxy();
        lazyDataSource.setTargetDataSource(hikariDataSource);
        return lazyDataSource;
    }
}

To solve that error, I now have to explicitly add this to application class:

@EnableConfigurationProperties(DataSourceProperties.class)

Do you know what has changed that can explain this please?

Answer 1

The DataSourceAutoConfiguration contains the @EnableConfigurationProperties(DataSourceProperties.class) so obviously when you are excluding it that @EnableConfigurationProperties doesn't apply either anymore. I suspect the better auto config support and conditionals parsing now resulted in that, which I think should be expected. IMHO it was strange that it worked (exclude the config but still use the properties).

Nonetheless I would strongly suggest you to ditch your whole DatabaseConfiguration and the exclude and instead add a BeanPostProcessor to wrap your DataSource bean(s) in a LazyConnectionDataSourceProxy.

@Bean
public static BeanPostProcessor lazyDataSourceWrapper() {

  return new BeanPostProcessor() {
    public Object postProcessAfterInitialization(Object bean, String beanName) throws BeansException {
      if (bean instanceof HikariDataSource ds) {
        return new LazyConnectionDataSourceProxy(ds);
      }
      return bean;
    }
  }
}

This way you achieve exactly the same without you needing to mess around with excludes and your own datasource config.