我们有多个线程试图从EHCache获取数据,这有时会导致并发修改异常。我尝试了Retryable来解决这个问题,但似乎没有任何作用。有什么建议吗?
@Override
@Retryable(include= ConcurrentModificationException.class, backoff = @Backoff(delay = 5000, maxDelay = 3000), maxAttempts = 5)
public Object getFromCache(String cacheDomain, String cacheKey) {
Object value = null;
Cache cacheObject = getCacheObject();
if (cacheObject != null) {
StringBuilder fullCacheKey = new StringBuilder();
fullCacheKey.append(cacheDomain);
fullCacheKey.append("|");
fullCacheKey.append(cacheKey);
synchronized (cacheObject) {
Element cacheElement = cacheObject.get(fullCacheKey.toString());
if (cacheElement != null) {
value = cacheElement.getObjectValue();
}
}
log.debug("Value from Cache with key [" + fullCacheKey.toString() + "] is " + value);
}
return value;
}
我现在在方法中做了一个深度复制,以防止这个错误。这样做会不会有什么不可预见的后果?该方法只会从缓存中获取,所以我相信不会有任何影响。
Element cacheElement = (Element) SerializationUtils.clone(cacheObject.get(fullCacheKey.toString()))。