private ContentReader attemptCacheAndRead(String url) {
ContentReader reader = null;
try {
if (!cache.contains(url)) {
if (cache.put(url, backingStore.getReader(url))) {
reader = cache.getReader(url);
}
} else {
reader = cache.getReader(url);
}
} catch (CacheMissException e) {
cache.remove(url);
}
return reader;
}
