private void removeFromCache(Object key) {
try {
Cache cache =
CacheManager.getInstance().getCacheFactory().createCache(Collections.emptyMap());
cache.remove(key);
} catch (CacheException e) {
Logger.getLogger(location).log(Level.SEVERE, "removeFromCache(): Cache error: " + e);
e.printStackTrace();
}
}
/**
* Adds new updates to storage.
*
* @param newUpdates
*/
public static void addUpdates(List<TrainUpdate> newUpdates) {
if (newUpdates.isEmpty()) {
return;
}
// Add the new updates to the list of cached results.
@SuppressWarnings("unchecked")
List<TrainUpdate> cachedUpdates = (List<TrainUpdate>) cache.get(CACHED_UPDATES_KEY);
if (cachedUpdates == null) {
cachedUpdates = new ArrayList<TrainUpdate>();
}
log.info("Fetched cache with size of : " + cachedUpdates.size());
cachedUpdates.addAll(newUpdates);
// Update the storage stats
StorageStats stats = getStorageStats();
stats.setLatestUpdateId(newUpdates.get(0).getTwitterId());
// Attempt to persist the updates to the data store.
PersistenceManager pm = PMF.get().getPersistenceManager();
try {
pm.makePersistentAll(cachedUpdates);
pm.makePersistent(stats);
cachedUpdates.clear();
log.info("Cache cleared");
} catch (DatastoreTimeoutException ex) {
log.info("Couldn't write to datastore. caching instead");
} finally {
// No matter what happens, store the new cached results.
cache.remove(CACHED_QUERIES_KEY);
cache.put(CACHED_UPDATES_KEY, cachedUpdates);
cache.put(STORAGE_STATS_KEY, stats);
log.info("Updated cache to size of : " + cachedUpdates.size());
pm.close();
}
}
public void expireArticlesUrl() {
cache.remove(RECENT_ARTICLE_KEY);
cache.remove(POPULAR_ARTICLE_KEY);
cache.remove(RELATIVE_URL_KEY);
}