/**
* An incremental, poll-based expunger.
*
* <p>Package-protected for unit-test visibility.
*/
@SuppressWarnings("unchecked")
synchronized void pageOutStaleEntries() {
int c = 0;
long startTime = System.currentTimeMillis();
for (SoftEntry<V> entry; (entry = (SoftEntry<V>) refQueue.poll()) != null; ) {
pageOutStaleEntry(entry);
c++;
}
if (c > 0 && logger.isLoggable(Level.FINER)) {
long endTime = System.currentTimeMillis();
try {
logger.finer(
"DB: "
+ db.getDatabaseName()
+ ", Expunged: "
+ c
+ ", Diskmap size: "
+ diskMap.size()
+ ", Cache size: "
+ memMap.size()
+ ", in "
+ (endTime - startTime)
+ "ms");
} catch (DatabaseException e) {
logger.log(Level.FINER, "exception while logging", e);
}
}
}
/**
* Call this method when you have an instance when you used the default constructor or when you
* have a deserialized instance that you want to reconnect with an extant bdbje environment. Do
* not call this method if you used the {@link #CachedBdbMap(File, String, Class, Class)}
* constructor.
*
* @param env
* @param keyClass
* @param valueClass
* @param classCatalog
* @throws DatabaseException
*/
@SuppressWarnings("unchecked")
public void initialize(
final Environment env,
String dbName,
final Class valueClass,
final StoredClassCatalog classCatalog)
throws DatabaseException {
// TODO: initial capacity should be related to number of seeds, max depth, max docs
this.memMap =
new ConcurrentHashMap<String, SoftEntry<V>>(
8192, // initial capacity
0.9f, // acceptable load factor
64 // est. number of concurrent threads
);
this.refQueue = new ReferenceQueue<V>();
canary = new SoftReference<LowMemoryCanary>(new LowMemoryCanary());
this.db = openDatabase(env, dbName);
this.diskMap = createDiskMap(this.db, classCatalog, valueClass);
this.count = new AtomicLong(diskMap.size());
}
