Examples of org.apache.commons.collections.map.LRUMap

Package org.apache.commons.collections.map

Examples of org.apache.commons.collections.map.LRUMap

org.apache.commons.collections.map.LRUMap
A Map implementation with a fixed maximum size which removes the least recently used entry if an entry is added when full.
The least recently used algorithm works on the get and put operations only. Iteration of any kind, including setting the value by iteration, does not change the order. Queries such as containsKey and containsValue or access via views also do not change the order.
The map implements OrderedMap and entries may be queried using the bidirectional OrderedMapIterator. The order returned is least recently used to most recently used. Iterators from map views can also be cast to OrderedIterator if required.
All the available iterators can be reset back to the start by casting to ResettableIterator and calling reset(). @since Commons Collections 3.0 (previously in main package v1.0) @version $Revision: 1.14 $ $Date: 2004/06/07 22:13:53 $ @author James Strachan @author Morgan Delagrange @author Stephen Colebourne @author Mike Pettypiece @author Mario Ivankovits

        this.dirContext = dirContext;
        if (dirContext instanceof BaseDirContext) {
            // Initialize parameters based on the associated dir context, like
            // the caching policy.
            if (((BaseDirContext) dirContext).isCached()) {
                cache = Collections.synchronizedMap(new LRUMap(cacheSize));
                cacheTTL = ((BaseDirContext) dirContext).getCacheTTL();
                cacheObjectMaxSize = 
                    ((BaseDirContext) dirContext).getCacheObjectMaxSize();
            }
        }

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     * @see AbstractAuthenticator
     */
    public SimpleAuthenticator()
    {
        super( AuthenticationLevel.SIMPLE.toString() );
        credentialCache = new LRUMap( DEFAULT_CACHE_SIZE );
    }

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     */
    public SimpleAuthenticator( int cacheSize )
    {
        super( AuthenticationLevel.SIMPLE.toString() );


        credentialCache = new LRUMap( cacheSize > 0 ? cacheSize : DEFAULT_CACHE_SIZE );
    }

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    scanning = IteratorScope.scan.equals(env.getIteratorScope());
    if (scanning) {
      String auths = options.get(AUTH_OPT);
      if (auths != null && !auths.isEmpty()) {
        ve = new VisibilityEvaluator(new Authorizations(auths.getBytes(Constants.UTF8)));
        visibleCache = new LRUMap(100);
      }
    }


    if (options.containsKey(MAX_BUFFER_SIZE_OPT)) {
      maxBufferSize = AccumuloConfiguration.getMemoryInBytes(options.get(MAX_BUFFER_SIZE_OPT));
    } else {
      maxBufferSize = DEFAULT_MAX_BUFFER_SIZE;
    }


    parsedVisibilitiesCache = new LRUMap(100);
  }

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    copy.seekColumnFamilies = (seekColumnFamilies == null) ? null : new HashSet<ByteSequence>(seekColumnFamilies);
    copy.seekColumnFamiliesInclusive = seekColumnFamiliesInclusive;


    copy.ve = ve;
    if (visibleCache != null) {
      copy.visibleCache = new LRUMap(visibleCache.maxSize());
      copy.visibleCache.putAll(visibleCache);
    }


    if (parsedVisibilitiesCache != null) {
      copy.parsedVisibilitiesCache = new LRUMap(parsedVisibilitiesCache.maxSize());
      copy.parsedVisibilitiesCache.putAll(parsedVisibilitiesCache);
    }


    copy.maxBufferSize = maxBufferSize;

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    public DefaultPrincipalProvider(Session securitySession,
                                    UserManagerImpl userManager) throws RepositoryException {


        this.userManager = userManager;
        everyonePrincipal = EveryonePrincipal.getInstance();
        membershipCache = new LRUMap();


        // listen to modifications of group-membership
        String[] ntNames = new String[1];
        if (securitySession instanceof SessionImpl) {
            NameResolver resolver = (NameResolver) securitySession;

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        threadCache = new InheritableThreadLocal<Map<String, CacheEntry>>(){
            @Override
            protected Map<String, CacheEntry> initialValue(){
                // Bug 51942 - this map may be used from multiple threads
                @SuppressWarnings("unchecked") // LRUMap is not generic currently
                Map<String, CacheEntry> map = new LRUMap(getMaxSize());
                return Collections.<String, CacheEntry>synchronizedMap(map);
            }
        };
    }

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        threadCache = new InheritableThreadLocal<Map<String, CacheEntry>>(){
            @Override
            protected Map<String, CacheEntry> initialValue(){
                // Bug 51942 - this map may be used from multiple threads
                @SuppressWarnings("unchecked") // LRUMap is not generic currently
                Map<String, CacheEntry> map = new LRUMap(getMaxSize());
                return Collections.<String, CacheEntry>synchronizedMap(map);
            }
        };
    }

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  private static final Logger log = Logger.getLogger(VisibilityFilter.class);
  
  public VisibilityFilter(Authorizations authorizations, byte[] defaultVisibility) {
    this.ve = new VisibilityEvaluator(authorizations);
    this.defaultVisibility = new Text(defaultVisibility);
    this.cache = new LRUMap(1000);
    this.tmpVis = new Text();
  }

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   */
  protected WebSocketMessagesViewModel(TableWebSocket webSocketTable) {
    super();
    
    table = webSocketTable;
    fullMessagesCache = new LRUMap(10);
  }

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