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public abstract class ArchiveSequence {
public static Pattern p = Pattern.compile("[0-9]{1,}");
private final Map<String, Map<String, AtomicInteger>> archiveNos = new ConcurrentHashMap<String, Map<String, AtomicInteger>>();
private final int length = 10;
protected abstract String getArchiveNoFromDB(String userId);
protected String generateArchiveNo(String userId) {
Map<String, AtomicInteger> atomicIntegerMap = archiveNos.computeIfAbsent(userId, k -> initSequence(userId));
AtomicInteger sequence = atomicIntegerMap.get(getLocalDate());
if (Objects.isNull(sequence)) {
atomicIntegerMap.clear();
atomicIntegerMap.putIfAbsent(getLocalDate(), new AtomicInteger(0));
}
int no = atomicIntegerMap.get(getLocalDate()).incrementAndGet();
if (no > 99) {
throw new RuntimeException("每天最多允许归档99次");
}
return String.format(getLocalDate() + "%02d", no);
}
private Map<String, AtomicInteger> initSequence(String userId) {
String sequence = getArchiveNoFromDB(userId);
int startSequence = 0;
if (StringUtils.isNotBlank(sequence) && sequence.length() > length && isNumeric(sequence.substring(sequence.length() - 10))) {
startSequence = Integer.parseInt(sequence.substring(sequence.length() - 2));
}
if (startSequence > 99) {
throw new RuntimeException("每天最多允许归档99次");
}
HashMap<String, AtomicInteger> map = new HashMap<>(1);
map.put(getLocalDate(), new AtomicInteger(startSequence));
return map;
}
private String getLocalDate() {
return DateTimeFormatter.ofPattern("yyyyMMdd").format(LocalDate.now());
}
private boolean isNumeric(String s){
Matcher m = p.matcher(s);
return m.matches();
}
}
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