Getting driverClassName with external tomcat using JNDI into spring boot application

Question

I have a spring boot application with datasource configured on external tomcat, How can I get the driverClassName of the datasource configured by the external tomcat into my spring boot application.

I tried to write some code as

PoolProperties poolProps = new PoolProperties();
Properties dbProperties = poolProps.getDbProperties();
String databaseUrl = dbProperties.getProperty("databaseUrl");

But the databaseUrl in the above code returns null. Can anyone suggest How can I get driverClassName into my java code?

Answer 1

You can retrieve the JavaBean properties of your datasource through reflection. Just use one of the many tools that help with introspection.

Since you already have spring-beans as dependency you can use:

final BeanWrapper accessor = PropertyAccessorFactory.forBeanPropertyAccess(dataSource);
final String url = String.valueOf(accessor.getPropertyValue("url"));

You can also use reflection directly, but it becomes easily difficult to read:

try {
    final String value = String.valueOf(dataSource.getClass().getMethod("getUrl").invoke(dataSource));
} catch (ReflectiveOperationException e) {
    ...
}