UnitOfWorkProtocol

...

UnitOrWork unitOfWork = UnitOfWork.begin();
try {
    AddressBook book = new AddressBook(...);
    unitOfWork.registerNew(book); 
    book.addContact(contact);
    unitOfWork.registerDirty(book); 
    unitOfWork.commit();
} 
catch(Exception e) {
    unitOfWork.rollback();  
}
finally {
    unitOfWork.dispose();
}

and still all the transaction and persistence management will take place.

...

The UnitOfWorkProtocol aspect has four abstract pointcuts that you have to define in your XML definition aop.xml file (a "transactional object" is an object that is set to participate in the Unit Of Work transaction, meaning that the Unit Of Work will keep track of its state):

• txRequires - picks out all points in the code where you want a TX REQUIRES transaction to begin, commit and rollback
• txRequiresNew - picks out all points in the code where you want a TX REQUIRES_NEW transaction to begin, commit and rollback
• txSupports - picks out all points in the code where you want a TX SUPPORTS transaction to begin, commit and rollback
• txMandatory - picks out all points in the code where you want a TX MANDATORY transaction to begin, commit and rollback
• txNever - picks out all points in the code where you want a TX NEVER transaction to begin, commit and rollback
• transactionalObjects - picks out all transactional object, this pointcut is used by the Transactional Mixin
• transactionalObjectCreationPoints - picks out all points in the code where a transactional object is created
• transactionalObjectModificationPoints - picks out all points in the code where a transactional object is being modified (best done with a set(...) pointcut)

...

<aspect class="org.codehaus.aware.unitofwork.UnitOfWorkProtocol">
    <pointcut name="txSupports" expression="execution(* org.codehaus.aware.app.service.*.*(..))"/>
    <pointcut name="txMandatorytxRequires" expression="execution(* org.codehaus.aware.app.domain.*.*(..))"/>

    <pointcut name="transactionalObjects" expression="class(org.codehaus.aware.app.domain.*)"/>
    <pointcut name="transactionalObjectCreationPoints" expression="call(org.codehaus.aware.app.domain.*.new(..))"/>
    <pointcut name="transactionalObjectModificationPoints" expression="set(* org.codehaus.aware.app.domain.*.*)"/>
</aspect>