Developing Java Applications with Spring and Spring Boot

How it works...

As you can see, the amount of information that is printed in the debug mode can be somewhat overwhelming, so I've selected only one example of positive and negative matches each.

For each line of the report, Spring Boot tells us why certain configurations have been selected to be included, what they have been positively matched on, or, for the negative matches, what was missing that prevented a particular configuration being included in the mix. Let's look at the positive match for DataSourceAutoConfiguration:

• The @ConditionalOnClass classes found tells us that Spring Boot has detected the presence of a particular class, specifically two classes in our case: javax.sql.DataSource and org.springframework.jdbc.datasource.embedded.EmbeddedDatabaseType ...