@CheckForNull
public synchronized byte[] get(@Nonnull String obj, @Nullable Callable<byte[]> valueLoader)
throws Exception {
String key = getKey(obj);
try {
lock();
if (!forceUpdate) {
byte[] cached = getCache(key);
if (cached != null) {
log.debug("cache hit for " + obj + " -> " + key);
return cached;
}
log.debug("cache miss for " + obj + " -> " + key);
} else {
log.debug("cache force update for " + obj + " -> " + key);
}
if (valueLoader != null) {
byte[] value = valueLoader.call();
if (value != null) {
putCache(key, value);
}
return value;
}
} finally {
unlock();
}
return null;
}
/**
* Deletes cache entries that are no longer valid according to the default expiration time period.
*/
public synchronized void clean() {
log.info("cache: cleaning");
try {
lock();
deleteCacheEntries(createCleanFilter());
} catch (IOException e) {
log.error("Error cleaning cache", e);
} finally {
unlock();
}
}