+++ /dev/null
-package de.juplo.kafka.payment.transfer.domain;
-
-
-import de.juplo.kafka.payment.transfer.ports.*;
-import lombok.RequiredArgsConstructor;
-import lombok.extern.slf4j.Slf4j;
-
-import java.util.Optional;
-
-import static de.juplo.kafka.payment.transfer.domain.Transfer.State.CHECKED;
-import static de.juplo.kafka.payment.transfer.domain.Transfer.State.CREATED;
-
-
-@Slf4j
-@RequiredArgsConstructor
-public class TransferService implements CreateTransferUseCase, HandleStateChangeUseCase, GetTransferUseCase
-{
- private final TransferRepository repository;
- private final MessagingService messagingService;
-
- @Override
- public void create(Long id, Long payer, Long payee, Integer amount)
- {
- repository
- .get(id)
- .ifPresentOrElse(
- stored -> log.info(
- "transfer already exisits: {}, ignoring: id={}, payer={}, payee={}, amount={}",
- stored,
- payer,
- payee,
- amount),
- () ->
- {
- Transfer transfer =
- Transfer
- .builder()
- .id(id)
- .payer(payer)
- .payee(payee)
- .amount(amount)
- .build();
-
- log.info("creating transfer: {}", transfer);
- repository.store(transfer);
- messagingService.send(transfer.getId(), CREATED);
- });
- }
-
- @Override
- public void handleStateChange(Long id, Transfer.State state)
- {
- get(id)
- .ifPresentOrElse(
- transfer ->
- {
- switch (state)
- {
- case CREATED:
-
- transfer.setState(CREATED);
- repository.store(transfer);
- check(transfer);
- break;
-
- case CHECKED:
-
- transfer.setState(CHECKED);
- repository.store(transfer);
- // TODO: What's next...?
- break;
-
- default:
-
- log.warn("TODO: handle {} state {}", state.foreign ? "foreign" : "domain", state);
- }
- },
- () -> log.error("unknown transfer: {}", id));
- }
-
- private void check(Transfer transfer)
- {
- // TODO: Do some time consuming checks...
- messagingService.send(transfer.getId(), CHECKED);
- }
-
- public Optional<Transfer> get(Long id)
- {
- return repository.get(id);
- }
-}