JarCastingKotowari Restful
Kotowari-Restful is a RESTful API specific framework.
Resource
A resource class should implements the Resource interface.
public interface Resource {
Function<RestContext, ?> getFunction(DecisionPoint point);
}
Class resource
A class resource is a useful for defining resource functions in a single class file as following.
public class AddressesResource {
@Inject
private BeansValidator validator;
@Inject
private BeansConverter beansConverter;
@Decision(value = MALFORMED, method={"GET"})
public Problem isMalformed(Parameters params, RestContext context) {
AddressSearchParams searchParams = beansConverter.createFrom(params, AddressSearchParams.class);
context.putValue(searchParams);
Set<ConstraintViolation<AddressSearchParams>> violations = validator.validate(searchParams);
return violations.isEmpty() ? null : Problem.fromViolations(violations);
}
@Decision(value = MALFORMED, method={"POST"})
public Problem isPostMalformed(Address address) {
Set<ConstraintViolation<Address>> violations = validator.validate(address);
return violations.isEmpty() ? null : Problem.fromViolations(violations);
}
@Decision(HANDLE_OK)
public List<Address> handleOk(AddressSearchParams params, EntityManager em) {
CriteriaBuilder builder = em.getCriteriaBuilder();
CriteriaQuery<Address> query = builder.createQuery(Address.class);
Root<Address> root = query.from(Address.class);
query.select(root);
return em.createQuery(query)
.setFirstResult(params.getOffset())
.setMaxResults(params.getLimit())
.getResultList();
}
@Decision(POST)
public Address handleCreated(Address address, EntityManager em) {
EntityTransactionManager tx = new EntityTransactionManager(em);
tx.required(() -> em.persist(address));
return address;
}
}
A class resource has a parent resource. It's used to define default resource functions.
ResourceInvokerMiddleware
ResourceInvokerMiddleware is a middleware for dispatching a request to the resource matching by routing.
