README.md

JDBI examples

This repo contains some example code used to try out using JDBI as a persistence framework in Java projects.

The domain model used in the examples looks like this:

| Team | ---> | Person | -(cascade)-> | Address |

Notes

CGLIB issue with references

JDBI generates boilerplate code from annotated interfaces or abstract classes. When using abstract classes it would be nice to di the following:

@RegisterMapper(AddressMapper.class)
public abstract class AddressAbstractClassJdbiDao implements AddressDao {
}

...

public Foo {
    private AddressDao addressDao = dbi.onDemand(AddressAbstractClassJdbiDao.class);
}

However, this doesn't work. You will get a null pointer exception. Instead you must use the abstract (implementation) class as reference, like this:

@RegisterMapper(AddressMapper.class)
public abstract class AddressAbstractClassJdbiDao implements AddressDao {
}

...

public Foo {
    private AddressAbstractClassJdbiDao addressDao = dbi.onDemand(AddressAbstractClassJdbiDao.class);
}

CGLIB issue with abstract classes

It seems that when using abstract classes with CGLIB you need to put them in a separate file, otherwise you get the following error:

java.lang.IllegalArgumentException: Superclass has no null constructors but no arguments were given
	at org.skife.jdbi.cglib.proxy.Enhancer.emitConstructors(Enhancer.java:721)
	at org.skife.jdbi.cglib.proxy.Enhancer.generateClass(Enhancer.java:499)