여러 스레드에서 해시를 추가하려고합니다. 항목을 이미 업데이트하고 싶으면 항목을 추가하고 싶으면 목록에 추가하고 싶습니다.여러 스레드에서 HashSet을 추가 할 때 오류가 발생했습니다.
코드를 사용하면 여러 개의 항목이 갑자기 같은 참조를 가리키고 있기 때문에 많은 중복으로 끝납니다. 나는 이것이 어디서 또는 왜 일어나는지 볼 수 없다.
다음은 내가 처음으로 문제를 볼 때 끝나는 "로그"문자열 다음에 사용하는 코드입니다. 갑자기 이미 추가 된 모든 항목의 값이 같음을 알 수 있습니다.
lock (_remoteDevicesLock)
{
RemoteDevice rDevice = new RemoteDevice(notifyMessage.UUID, notifyMessage.Location);
log += notifyMessage.UUID + " " + rDevice.UUID;
if (!_remoteDevices.Add(rDevice))
{
log += " Not Added \r\n";
rDevice = (from d in _remoteDevices
where d.UUID.Trim().Equals(notifyMessage.UUID.Trim(), StringComparison.OrdinalIgnoreCase)
select d).FirstOrDefault();
if (rDevice != null)
{
//Update Device Expire Time
}
}
else
{
log += " Added \r\n Current HashSet: \r\n";
foreach (RemoteDevice rd in _remoteDevices)
{
log += rd.UUID + " \r\n";
}
}
}
00000000-0000-0001-1000-001cdf885737 00000000-0000-0001-1000-001cdf885737 Added
Current HashSet:
00000000-0000-0001-1000-001cdf885737
00000000-0000-0001-1000-001cdf885737 00000000-0000-0001-1000-001cdf885737 Not Added
00000000-0000-0001-1000-001cdf885737 00000000-0000-0001-1000-001cdf885737 Not Added
00000000-0000-0001-0002-001cdf885737 00000000-0000-0001-0002-001cdf885737 Added
Current HashSet:
00000000-0000-0001-1000-001cdf885737
00000000-0000-0001-0002-001cdf885737
00000000-0000-0001-0002-001cdf885737 00000000-0000-0001-0002-001cdf885737 Not Added
00000000-0000-0001-0002-001cdf885737 00000000-0000-0001-0002-001cdf885737 Not Added
00000000-0000-0001-0002-001cdf885737 00000000-0000-0001-0002-001cdf885737 Not Added
00000000-0000-0001-0002-001cdf885737 00000000-0000-0001-0002-001cdf885737 Not Added
00000000-0000-0001-0001-001cdf885737 00000000-0000-0001-0001-001cdf885737 Added
Current HashSet:
00000000-0000-0001-1000-001cdf885737
00000000-0000-0001-0002-001cdf885737
00000000-0000-0001-0001-001cdf885737
00000000-0000-0001-0001-001cdf885737 00000000-0000-0001-0001-001cdf885737 Not Added
00000000-0000-0001-0001-001cdf885737 00000000-0000-0001-0001-001cdf885737 Not Added
00000000-0000-0001-0000-001cdf885737 00000000-0000-0001-0000-001cdf885737 Added
Current HashSet:
00000000-0000-0001-1000-001cdf885737
00000000-0000-0001-0002-001cdf885737
00000000-0000-0001-0001-001cdf885737
00000000-0000-0001-0000-001cdf885737
00000000-0000-0001-0000-001cdf885737 00000000-0000-0001-0000-001cdf885737 Not Added
00000000-0000-0001-0000-001cdf885737 00000000-0000-0001-0000-001cdf885737 Not Added
00000000-0000-0001-0000-001cdf885737 00000000-0000-0001-0000-001cdf885737 Not Added
00000000-0000-0001-0000-001cdf885737 00000000-0000-0001-0000-001cdf885737 Not Added
00000000-0000-0001-1000-001cdf885737 00000000-0000-0001-1000-001cdf885737 Not Added
00000000-0000-0001-1000-001cdf885737 00000000-0000-0001-1000-001cdf885737 Not Added
00000000-0000-0001-1000-001cdf885737 00000000-0000-0001-1000-001cdf885737 Not Added
00000000-0000-0001-0002-001cdf885737 00000000-0000-0001-0002-001cdf885737 Not Added
00000000-0000-0001-0002-001cdf885737 00000000-0000-0001-0002-001cdf885737 Not Added
00000000-0000-0001-0002-001cdf885737 00000000-0000-0001-0002-001cdf885737 Not Added
00000000-0000-0001-0002-001cdf885737 00000000-0000-0001-0002-001cdf885737 Not Added
00000000-0000-0001-0002-001cdf885737 00000000-0000-0001-0002-001cdf885737 Not Added
00000000-0000-0001-0001-001cdf885737 00000000-0000-0001-0001-001cdf885737 Not Added
00000000-0000-0001-0001-001cdf885737 00000000-0000-0001-0001-001cdf885737 Not Added
00000000-0000-0001-0001-001cdf885737 00000000-0000-0001-0001-001cdf885737 Not Added
00000000-0000-0001-0000-001cdf885737 00000000-0000-0001-0000-001cdf885737 Not Added
00000000-0000-0001-0000-001cdf885737 00000000-0000-0001-0000-001cdf885737 Not Added
00000000-0000-0001-0000-001cdf885737 00000000-0000-0001-0000-001cdf885737 Not Added
00000000-0000-0001-0000-001cdf885737 00000000-0000-0001-0000-001cdf885737 Not Added
00000000-0000-0001-0000-001cdf885737 00000000-0000-0001-0000-001cdf885737 Not Added
00000000-0000-0001-1000-001cdf885737 00000000-0000-0001-1000-001cdf885737 Not Added
00000000-0000-0001-1000-001cdf885737 00000000-0000-0001-1000-001cdf885737 Not Added
00000000-0000-0001-1000-001cdf885737 00000000-0000-0001-1000-001cdf885737 Not Added
00000000-0000-0001-0002-001cdf885737 00000000-0000-0001-0002-001cdf885737 Not Added
00000000-0000-0001-0002-001cdf885737 00000000-0000-0001-0002-001cdf885737 Not Added
00000000-0000-0001-0002-001cdf885737 00000000-0000-0001-0002-001cdf885737 Not Added
00000000-0000-0001-0002-001cdf885737 00000000-0000-0001-0002-001cdf885737 Not Added
00000000-0000-0001-0002-001cdf885737 00000000-0000-0001-0002-001cdf885737 Not Added
00000000-0000-0001-0001-001cdf885737 00000000-0000-0001-0001-001cdf885737 Not Added
00000000-0000-0001-0001-001cdf885737 00000000-0000-0001-0001-001cdf885737 Not Added
00000000-0000-0001-0001-001cdf885737 00000000-0000-0001-0001-001cdf885737 Not Added
00000000-0000-0001-0000-001cdf885737 00000000-0000-0001-0000-001cdf885737 Not Added
00000000-0000-0001-0000-001cdf885737 00000000-0000-0001-0000-001cdf885737 Not Added
00000000-0000-0001-0000-001cdf885737 00000000-0000-0001-0000-001cdf885737 Not Added
00000000-0000-0001-0000-001cdf885737 00000000-0000-0001-0000-001cdf885737 Not Added
00000000-0000-0001-0000-001cdf885737 00000000-0000-0001-0000-001cdf885737 Not Added
00000000-0000-0001-1000-001cdf885737 00000000-0000-0001-1000-001cdf885737 Added
Current HashSet:
00000000-0000-0001-0000-001cdf885737
00000000-0000-0001-0000-001cdf885737
00000000-0000-0001-0000-001cdf885737
00000000-0000-0001-0000-001cdf885737
00000000-0000-0001-1000-001cdf885737
업데이트 : 여기 GetHashCode입니다 그리고 내가 수동 검사와 목록을 사용하여도 문제가 있었다되었을 때 문제가 여기에있다 생각하지 않지만 요청에 따라 같음.
public override bool Equals(object obj)
{
var other = obj as RemoteDevice;
if (other == null)
{
return false;
}
else
{
return UUID.Trim().Equals(other.UUID.Trim(), StringComparison.OrdinalIgnoreCase);
}
}
public override int GetHashCode()
{
return UUID.GetHashCode();
}
1. 클래스 외부에 노출 된 객체를 잠그지 말고 잠그기 위해 특정 객체를 만들어야합니다. 2. 문자열 연결을 사용하여 로그 문자열에 추가하지 마십시오. ,'StringBuilder'를 사용하십시오. – Servy
RemoteDevice.Equals와 RemoteDevice.GetHashCode는 어떻게 보입니까? – fsimonazzi
이 스레드를 검사 할 수 있습니다. http://stackoverflow.com/questions/4306936/how-to-implement-concurrenthashset-in-net –