类被多次实例化； 如何分辨正在呼叫哪一个？

Question

I am working on the following code, where the same class is instantiated twice with two different names:

private final CdsResEventRepository hcrsResEventRepo;
private final CdsResEventRepository pcrsResEventRepo;
...
if (queueRec.getDbId() == DbId.HCRS) {
  delCnt = hcrsResEventRepo.delete(seqId);
} else if (queueRec.getDbId() == DbId.PCRS) {
  delCnt = pcrsResEventRepo.delete(seqId);
}

Depending on the condition, the same method may be called with one class name or the other.

From inside CdsResEventRepository.delete, how can I tell whether it was called as hcrsResEventRepo.delete or pcrsResEventRepo.delete?

My first thought was to use getStackTrace() to get the called Class. However, this returns only "CdsResEventRepository", and does not tell whether it was the hcrsResEventRepo instantiation or the pcrsResEventRepo instantiation.

From within the method being called, what is the best way to tell which instantiation was used to call it?

Answer 1

What about a booleand flag? boolean wasCalled , if you can modify your class. If you can't, a boolean variable between lines. A quick solution, but works.

boolean hcrsResEventRepoDeleted = false;
if (queueRec.getDbId() == DbId.HCRS) {
  delCnt = hcrsResEventRepo.delete(seqId);
  hcrsResEventRepoDeleted = true;
} else if (queueRec.getDbId() == DbId.PCRS) {
  delCnt = pcrsResEventRepo.delete(seqId);
}

Then do something with the boolean. If you have access to you class:

delCntH = hcrsResEventRepo.delete(seqId, DbId.HCRS, queueRec.getDbId());
delCntP = hcrsResEventRepo.delete(seqId, DbId.PCRS, queueRec.getDbId());

and call queueRec.delete(seqId) inside that new delete method with the if logic and the extra info;