Create Tomcat JDBC pool when DataSource bean is ready

[izeye]

Before invoking getConnection() for the first time, Tomcat JDBC pool is not created.

It would be nice to create Tomcat JDBC pool when DataSource bean is ready.

This is a sample project: https://github.com/izeye/spring-boot-throwaway-branches/tree/jdbc-mysql

This is the coordinate of the test showing this issue: https://github.com/izeye/spring-boot-throwaway-branches/blob/jdbc-mysql/src/test/java/com/izeye/throwaway/ApplicationTests.java#L38

[snicoll]

It would be nice to create Tomcat JDBC pool when DataSource bean is ready.

Why? What's the actual problem you're facing?

[izeye]

@snicoll If not, the first request will be responded slowly due to the cost of the pool creation.

[izeye]

@snicoll May I open a PR for this issue?

[snicoll]

Of course Johnny, thanks a lot for your efforts!

[izeye]

@snicoll Thanks! I will give it a try 😄