Assembly is done using the provided Assembler:

new UuidServiceAssembler().visibleIn( layer ).assemble( moduleAssembly );

Usage is quite simple:

@Service UuidService uuidService;

public void doSomething()
{
    String id1 = uuidService.generateUuid( 0 );
    // eg. 1020ECBB-098C-46E0-94DC-F78E2265EAA1-36

    String id2 = uuidService.generateUuid( 12 );
    // eg. 84E06578EAE3
}

Sequencing is used to automatically generate a sequence of numbers.

The algorithm is that currentSequenceValue is the number that was last returned in a newSequenceValue call, and will initially be zero. Persisting Sequencing services defines "initially" as the first run ever, as subsequent starts may retrieve the currentSequenceValue from an EntityStore.

new TransientSequencingAssembler().visibleIn( layer ).assemble( moduleAssembly );

@Service Sequencing sequencing;

public void doSomething()
{
    sequencing.currentSequenceValue(); // return 0

    sequencing.newSequenceValue(); // return 1
    sequencing.currentSequenceValue(); // return 1
}

new PersistingSequencingAssembler().visibleIn( layer ).assemble( moduleAssembly );

@Service Sequencing sequencing;

public void doSomething()
{
    sequencing.currentSequenceValue(); // return 0

    sequencing.newSequenceValue(); // return 1
    sequencing.currentSequenceValue(); // return 1
}