Example usage for java.util WeakHashMap WeakHashMap

Introduction

In this page you can find the example usage for java.util WeakHashMap WeakHashMap.

Prototype

public WeakHashMap()

Source Link

Document

Constructs a new, empty WeakHashMap with the default initial capacity (16) and load factor (0.75).

Usage

From source file:org.openmrs.util.HandlerUtil.java

public static void clearCachedHandlers() {
    cachedHandlers = new WeakHashMap<HandlerUtil.Key, List<?>>();
}

From source file:org.springframework.util.CachingMapDecorator.java

/**
 * Create a CachingMapDecorator,/*from  w  w w .jav a  2s  . c o m*/
 * using an underlying synchronized Map.
 * @param weakKeys whether to use weak references for keys
 */
public CachingMapDecorator(boolean weakKeys) {
    Map internalMap = weakKeys ? (Map) new WeakHashMap() : new HashMap();
    this.targetMap = Collections.synchronizedMap(internalMap);
}

From source file:net.big_oh.common.web.listener.session.SimpleSessionTrackingListener.java

private static synchronized Map<HttpSession, Object> getSessionsCollectionForServletContext(
        ServletContext servletContext) {
    String servletContextKey = getKeyForServletContext(servletContext);

    Map<HttpSession, Object> sessions = contextToSessionCollectionMap.get(servletContextKey);

    if (sessions == null) {
        // Sessions map must be synchronized because multiple threads will
        // add/remove sessions concurrently.
        ////from   www. j a  va2  s. c  o  m
        // Sessions map is an instance of WeakHashMap so that this data
        // structure will never prevent the Session from being garbage
        // collected.
        sessions = Collections.synchronizedMap(new WeakHashMap<HttpSession, Object>());
        contextToSessionCollectionMap.put(servletContextKey, sessions);
    }

    return sessions;
}

From source file:sk.stuba.fiit.kvasnicka.qsimsimulation.managers.TopologyManager.java

private void readObject(ObjectInputStream in) throws IOException, ClassNotFoundException {
    in.defaultReadObject();//www . j  a  va2 s  .c  o m
    edgeCache = new WeakHashMap<CacheKey, Edge>();
}

From source file:org.encuestame.oauth.security.ConcurrentMapOAuthSessionManager.java

/**
 * Constructor.
 */
public ConcurrentMapOAuthSessionManager() {
    sessions = new WeakHashMap<String, StandardOAuthSession>();
}

From source file:io.strandberg.xadisk.XADiskSessionFactory.java

@Autowired
public XADiskSessionFactory(JtaTransactionManager jtaTransactionManager,
        StandaloneFileSystemConfiguration standaloneFileSystemConfiguration) throws InterruptedException {
    this.transactionManager = jtaTransactionManager.getTransactionManager();
    this.standaloneFileSystemConfiguration = standaloneFileSystemConfiguration;
    xaSessionMap = Collections.synchronizedMap(new WeakHashMap<Transaction, XASession>());
}

From source file:com.adaptris.core.AdaptrisConnectionImp.java

/**
 * <p>//ww w  . j  a va2s.c  om
 * Created a new instance.
 * </p>
 */
public AdaptrisConnectionImp() {
    consumers = Collections.newSetFromMap(new WeakHashMap<AdaptrisMessageConsumer, Boolean>());
    producers = Collections.newSetFromMap(new WeakHashMap<AdaptrisMessageProducer, Boolean>());
    listeners = Collections.newSetFromMap(new WeakHashMap<StateManagedComponent, Boolean>());
    state = ClosedState.getInstance();
}

From source file:net.sf.l2j.gameserver.instancemanager.AwayManager.java

private AwayManager() {
    _awayPlayers = Collections.synchronizedMap(new WeakHashMap<L2PcInstance, RestoreData>());
}

From source file:org.apache.ambari.server.orm.dao.HostConfigMappingDAO.java

private void populateCache() {

    if (!cacheLoaded) {
        gl.writeLock().lock();//  w  w w  . ja v a  2  s . com
        try {
            gl.writeLock().lock();
            try {
                if (hostConfigMappingByHost == null) {
                    hostConfigMappingByHost = new WeakHashMap<String, Set<HostConfigMapping>>();

                    TypedQuery<HostConfigMappingEntity> query = entityManagerProvider.get().createQuery(
                            "SELECT entity FROM HostConfigMappingEntity entity", HostConfigMappingEntity.class);

                    List<HostConfigMappingEntity> hostConfigMappingEntities = daoUtils.selectList(query);

                    for (HostConfigMappingEntity hostConfigMappingEntity : hostConfigMappingEntities) {

                        Set<HostConfigMapping> setByHost = hostConfigMappingByHost
                                .get((hostConfigMappingEntity.getHostName()));

                        if (setByHost == null) {
                            setByHost = new HashSet<HostConfigMapping>();
                            hostConfigMappingByHost.put(hostConfigMappingEntity.getHostName(), setByHost);
                        }

                        HostConfigMapping hostConfigMapping = buildHostConfigMapping(hostConfigMappingEntity);
                        setByHost.add(hostConfigMapping);
                    }
                }
            } finally {
                gl.writeLock().unlock();
            }
        } finally {
            gl.writeLock().unlock();
        }

        cacheLoaded = true;

    }

}

From source file:org.apache.xml.security.utils.IdResolver.java

/**
 * Method registerElementById/*from   ww w  .  ja  v  a2 s.com*/
 *
 * @param element the element to register
 * @param idValue the value of the ID attribute
 */
public static void registerElementById(Element element, String idValue) {
    Document doc = element.getOwnerDocument();
    Map<String, WeakReference<Element>> elementMap;
    synchronized (docMap) {
        elementMap = docMap.get(doc);
        if (elementMap == null) {
            elementMap = new WeakHashMap<String, WeakReference<Element>>();
            docMap.put(doc, elementMap);
        }
    }
    elementMap.put(idValue, new WeakReference<Element>(element));
}