JDBC not registering metrics on spring boot 2 when #RefreshScope is on DataSource Bean - spring-boot

Question

I have an application that uses spring boot 2 and logs metrics from micrometer. I want to log jdbc (mysql) min, max, and active connections periodically. I also want to use #RefreshScope on my datasource bean to prevent hikari binding exceptions when injecting configs on the fly from spring admin. I find that when I use #RefreshScope on config class/datasource bean JDBC does not register itself with the MeterRegistry.
Is it possible to have JDBC register itself with the MeterRegistry with #RefreshScope?
Is there a way to progammatically register JDBC with the MeterRegistry in my bean definition?
#Configuration
#EnableAutoConfiguration
#EnableTransactionManagement
#RefreshScope
public class DbConfig {
#Primary
#Bean(name = "dataSource")
#RefreshScope
#ConfigurationProperties(prefix = "spring.datasource")
public DataSource dataSource() {
return DataSourceBuilder.create().build();
}
Removing #RefreshScope allows JDBC to automatically register with the MeterRegistry but causes the below exception on config change:
org.springframework.boot.context.properties.ConfigurationPropertiesBindException: Error creating bean with name 'dataSource': Could not bind properties to 'HikariDataSource' : prefix=spring.datasource, ignoreInvalidFields=false, ignoreUnknownFields=true; nested exception is org.springframework.boot.context.properties.bind.BindException: Failed to bind properties under 'spring.datasource' to javax.sql.DataSource

Answer 1

Add javax.sql.DataSource as an extra refreshable. application.yml file example:
spring:
cloud:
refresh.extra-refreshable:
- javax.sql.DataSource
and remove #RefreshScope from your class.
Other solution would be cast the DataSource to HikariDataSource.
I use the first solution because of DataSource creation is done by external library in my application.
Reference: https://github.com/spring-cloud/spring-cloud-commons/issues/318