public static void removeAllWithStringPrefix(AbstractCache<String, ?> cache, String urlPrefix) {
Set<String> keys = cache.keySet();
for (String key : keys) {
if (key.startsWith(urlPrefix)) {
cache.remove(key);
}
}
if (cache.isDiskCacheEnabled()) {
removeExpiredCache(cache, urlPrefix);
}
}
/**
* Add buildings to cache.
*
* @param buildingsFromKulturarv buildings to cache
*/
public void add(List<Building> buildingsFromKulturarv) {
Map<Long, Building> map = new HashMap<Long, Building>();
for (Building building : buildingsFromKulturarv) {
map.put(building.getId(), building);
}
super.add(map);
}
private static void removeExpiredCache(
final AbstractCache<String, ?> cache, final String urlPrefix) {
final File cacheDir = new File(cache.getDiskCacheDirectory());
if (!cacheDir.exists()) {
return;
}
File[] list =
cacheDir.listFiles(
new FilenameFilter() {
@Override
public boolean accept(File dir, String filename) {
return dir.equals(cacheDir)
&& filename.startsWith(cache.getFileNameForKey(urlPrefix));
}
});
if (list == null || list.length == 0) {
return;
}
for (File file : list) {
file.delete();
}
}
@Override
@SuppressFBWarnings("RCN_REDUNDANT_NULLCHECK_OF_NONNULL_VALUE")
public final VALUETYPE getFromCache(final KEYTYPE aKey) {
// read existing value
VALUETYPE aValue = super.getFromCacheNoStats(aKey);
if (aValue == null) {
// No old value in the cache
m_aRWLock.writeLock().lock();
try {
// Read again, in case the value was set between the two locking
// sections
// Note: do not increase statistics in this second try
aValue = super.getFromCacheNoStatsNotLocked(aKey);
if (aValue == null) {
// Call the abstract method to create the value to cache
aValue = getValueToCache(aKey);
// Just a consistency check
if (aValue == null)
throw new IllegalStateException("The value to cache was null for key '" + aKey + "'");
// Put the new value into the cache
super.putInCacheNotLocked(aKey, aValue);
m_aCacheAccessStats.cacheMiss();
} else m_aCacheAccessStats.cacheHit();
} finally {
m_aRWLock.writeLock().unlock();
}
} else m_aCacheAccessStats.cacheHit();
return aValue;
}
@Override
void destroy() {
// cache.dispose(); be careful, it must be done by cacheManager
cacheManager.cachesByName.remove(getName());
super.destroy();
}
