TerminalServiceImpl.java 文件源码

BigInteger determineUniqueId() {

        String entityName = Terminal.class.getAnnotation(Entity.class).name();
        BigInteger nextUniqueId = uniqueIdSequenceService.getNextId(entityName);

        boolean isUniqueIdAlreadyAssigned = terminalRepository.findByUniqueId(nextUniqueId) != null;

        while (isUniqueIdAlreadyAssigned) {
            // In this loop we increment the ID by ourselves to avoid write-accesses to the DB for performance.
            LOG.warn("Terminal uniqueId {} already assigned - trying next uniqueId", nextUniqueId);
            nextUniqueId = nextUniqueId.add(BigInteger.ONE);

            if (terminalRepository.findByUniqueId(nextUniqueId) == null) {
                isUniqueIdAlreadyAssigned = false;
                uniqueIdSequenceService.setNextId(entityName, nextUniqueId);
            }
        }

        return nextUniqueId;
    }