@Override public SagaInstance create(Data sagaData, Optional<String> resource) { SagaInstance sagaInstance = new SagaInstance(getSagaType(), null, "????", null, SagaDataSerde.serializeSagaData(sagaData), new HashSet<>()); sagaInstanceRepository.save(sagaInstance); String sagaId = sagaInstance.getId(); resource.ifPresent( r -> Assert.isTrue(sagaLockManager.claimLock(getSagaType(), sagaId, r), "Cannot claim lock for resource")); SagaActions<Data> actions = getStateDefinition().getStartingHandler().get().apply(sagaData); List<CommandWithDestination> commands = actions.getCommands(); sagaData = actions.getUpdatedSagaData().orElse(sagaData); sagaInstance.setLastRequestId(sendCommands(sagaId, commands)); sagaInstance.setSerializedSagaData(SagaDataSerde.serializeSagaData(sagaData)); publishEvents(sagaId, actions.getEventsToPublish(), actions.getUpdatedState()); Optional<String> possibleNewState = actions.getUpdatedState(); maybeUpdateState(sagaInstance, possibleNewState); maybePerformEndStateActions(sagaId, sagaInstance, possibleNewState); sagaInstanceRepository.update(sagaInstance); updateEnlistedAggregates(sagaId, actions.getEnlistedAggregates()); updateEventInstanceSubscriptions(sagaData, sagaId, sagaInstance.getStateName()); return sagaInstance; }