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:com.mike.aframe.http.KJHttp.java

/**
 * ?httpClient/*from   w w  w  .j av  a  2 s.  com*/
 */
private void initHttpClient() {
    BasicHttpParams httpParams = new BasicHttpParams();

    ConnManagerParams.setTimeout(httpParams, config.getConnectTimeOut());
    ConnManagerParams.setMaxConnectionsPerRoute(httpParams, new ConnPerRouteBean(config.getMaxConnections()));
    ConnManagerParams.setMaxTotalConnections(httpParams, config.getMaxConnections());

    HttpConnectionParams.setSoTimeout(httpParams, config.getConnectTimeOut());
    HttpConnectionParams.setConnectionTimeout(httpParams, config.getConnectTimeOut());
    HttpConnectionParams.setTcpNoDelay(httpParams, true);
    HttpConnectionParams.setSocketBufferSize(httpParams, config.getSocketBuffer());

    HttpProtocolParams.setVersion(httpParams, HttpVersion.HTTP_1_1);
    HttpProtocolParams.setUserAgent(httpParams, "KJLibrary");

    SchemeRegistry schemeRegistry = new SchemeRegistry();
    schemeRegistry.register(new Scheme("http", PlainSocketFactory.getSocketFactory(), 80));
    schemeRegistry.register(new Scheme("https", SSLSocketFactory.getSocketFactory(), 443));
    ThreadSafeClientConnManager cm = new ThreadSafeClientConnManager(httpParams, schemeRegistry);

    httpContext = new SyncBasicHttpContext(new BasicHttpContext());
    httpClient = new DefaultHttpClient(cm, httpParams);
    httpClient.addRequestInterceptor(new HttpRequestInterceptor() {
        @Override
        public void process(HttpRequest request, HttpContext context) {
            if (!request.containsHeader("Accept-Encoding")) {
                request.addHeader("Accept-Encoding", "gzip");
            }

            for (Entry<String, String> entry : config.getHeader().entrySet()) {
                request.addHeader(entry.getKey(), entry.getValue());
            }
        }
    });

    httpClient.addResponseInterceptor(new HttpResponseInterceptor() {
        @Override
        public void process(HttpResponse response, HttpContext context) {
            final HttpEntity entity = response.getEntity();
            if (entity == null) {
                return;
            }
            final Header encoding = entity.getContentEncoding();
            if (encoding != null) {
                for (HeaderElement element : encoding.getElements()) {
                    if (element.getName().equalsIgnoreCase("gzip")) {
                        response.setEntity(new InflatingEntity(response.getEntity()));
                        break;
                    }
                }
            }
        }
    });
    threadPool = (ThreadPoolExecutor) KJThreadExecutors.newCachedThreadPool();
    httpClient.setHttpRequestRetryHandler(new RetryHandler(config.getReadTimeout()));
    requestMap = new WeakHashMap<Context, List<WeakReference<Future<?>>>>();
}

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From source file:org.apache.axiom.om.util.StAXUtils.java

/**
 * @return XMLOutputFactory for the current classloader
 *//*from  ww  w.j a  v a 2  s .c  o  m*/
private static XMLOutputFactory getXMLOutputFactory_perClassLoader(StAXWriterConfiguration configuration) {
    ClassLoader cl = getContextClassLoader();
    XMLOutputFactory factory;
    if (cl == null) {
        factory = getXMLOutputFactory_singleton(configuration);
    } else {
        if (configuration == null) {
            configuration = StAXWriterConfiguration.DEFAULT;
        }
        Map map = (Map) outputFactoryPerCLMap.get(configuration);
        if (map == null) {
            map = Collections.synchronizedMap(new WeakHashMap());
            outputFactoryPerCLMap.put(configuration, map);
            factory = null;
        } else {
            factory = (XMLOutputFactory) map.get(cl);
        }

        if (factory == null) {
            if (log.isDebugEnabled()) {
                log.debug("About to create XMLOutputFactory implementation with " + "classloader=" + cl);
                log.debug("The classloader for javax.xml.stream.XMLOutputFactory is: "
                        + XMLOutputFactory.class.getClassLoader());
            }
            try {
                factory = newXMLOutputFactory(null, configuration);
            } catch (ClassCastException cce) {
                if (log.isDebugEnabled()) {
                    log.debug("Failed creation of XMLOutputFactory implementation with " + "classloader=" + cl);
                    log.debug("Exception is=" + cce);
                    log.debug("Attempting with classloader: " + XMLOutputFactory.class.getClassLoader());
                }
                factory = newXMLOutputFactory(XMLOutputFactory.class.getClassLoader(), configuration);
            }
            if (factory != null) {
                map.put(cl, factory);
                if (log.isDebugEnabled()) {
                    log.debug("Created XMLOutputFactory = " + factory.getClass() + " for classloader=" + cl);
                    log.debug("Configuration = " + configuration);
                    log.debug("Size of XMLOutFactory map for this configuration = " + map.size());
                    log.debug("Configurations for which factories have been cached = "
                            + outputFactoryPerCLMap.keySet());
                }
            } else {
                factory = getXMLOutputFactory_singleton(configuration);
            }
        }

    }
    return factory;
}

---

From source file:com.benefit.buy.library.http.query.callback.BitmapAjaxCallback.java

private void addQueue(String url, ImageView iv) {
    WeakHashMap<ImageView, BitmapAjaxCallback> ivs = queueMap.get(url);
    if (ivs == null) {
        if (queueMap.containsKey(url)) {
            //already a image view fetching
            ivs = new WeakHashMap<ImageView, BitmapAjaxCallback>();
            ivs.put(iv, this);
            queueMap.put(url, ivs);//www  .  j  ava 2s. c o  m
        } else {
            //register a view by putting a url with no value
            queueMap.put(url, null);
        }
    } else {
        //add to list of image views
        ivs.put(iv, this);
    }
}

---

From source file:com.appbase.androidquery.callback.BitmapAjaxCallback.java

private void addQueue(String url, ImageView iv) {

    WeakHashMap<ImageView, BitmapAjaxCallback> ivs = queueMap.get(url);

    if (ivs == null) {

        if (queueMap.containsKey(url)) {
            //already a image view fetching
            ivs = new WeakHashMap<ImageView, BitmapAjaxCallback>();
            ivs.put(iv, this);
            queueMap.put(url, ivs);//from  w w w. ja  va2s .c  o  m
        } else {
            //register a view by putting a url with no value
            queueMap.put(url, null);
        }

    } else {
        //add to list of image views
        ivs.put(iv, this);

    }

}

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From source file:org.dragonet.plugin.MixedPluginManager.java

@Override
public void subscribeToPermission(String permission, Permissible permissible) {
    String name = permission.toLowerCase();
    Map<Permissible, Boolean> map = permSubs.get(name);

    if (map == null) {
        map = new WeakHashMap<Permissible, Boolean>();
        permSubs.put(name, map);/*from  w w  w .ja v  a2  s.  com*/
    }

    map.put(permissible, true);
}

---

From source file:org.dragonet.plugin.MixedPluginManager.java

@Override
public void subscribeToDefaultPerms(boolean op, Permissible permissible) {
    Map<Permissible, Boolean> map = defSubs.get(op);

    if (map == null) {
        map = new WeakHashMap<Permissible, Boolean>();
        defSubs.put(op, map);//from   w  w w .  ja  va  2  s.  c  om
    }

    map.put(permissible, true);
}

---

From source file:hudson.scm.SubversionSCM.java

private synchronized Map<AbstractProject, List<External>> getProjectExternalsCache() {
    if (projectExternalsCache == null) {
        projectExternalsCache = new WeakHashMap<AbstractProject, List<External>>();
    }//from w w  w .  ja  v  a2s  .  c  om

    return projectExternalsCache;
}

---

From source file:conf.Configuration.java

/**
 * Load a class by name.//from w  w w .ja va 2  s.c  om
 * 
 * @param name the class name.
 * @return the class object.
 * @throws ClassNotFoundException if the class is not found.
 */
public Class<?> getClassByName(String name) throws ClassNotFoundException {
    Map<String, Class<?>> map;

    synchronized (CACHE_CLASSES) {
        map = CACHE_CLASSES.get(classLoader);
        if (map == null) {
            map = Collections.synchronizedMap(new WeakHashMap<String, Class<?>>());
            CACHE_CLASSES.put(classLoader, map);
        }
    }

    Class clazz = map.get(name);
    if (clazz == null) {
        clazz = Class.forName(name, true, classLoader);
        if (clazz != null) {
            // two putters can race here, but they'll put the same class
            map.put(name, clazz);
        }
    }

    return clazz;
}

---

From source file:org.jiemamy.utils.collection.CollectionsUtil.java

/**
 * {@link WeakHashMap}?????//from   ww  w . j a v a 2 s. c  o m
 * 
 * @param <K> {@link WeakHashMap}??
 * @param <V> {@link WeakHashMap}??
 * @return {@link WeakHashMap}???
 * @see WeakHashMap#WeakHashMap()
 */
public static <K, V> WeakHashMap<K, V> newWeakHashMap() {
    return new WeakHashMap<K, V>();
}

---

From source file:co.cask.cdap.common.conf.Configuration.java

/**
 * Load a class by name, returning null rather than throwing an exception
 * if it couldn't be loaded. This is to avoid the overhead of creating
 * an exception.//www  . j  a  v a  2 s. c  om
 *
 * @param name the class name
 * @return the class object, or null if it could not be found.
 */
public Class<?> getClassByNameOrNull(String name) {
    Map<String, Class<?>> map;

    synchronized (CACHE_CLASSES) {
        map = CACHE_CLASSES.get(classLoader);
        if (map == null) {
            map = Collections.synchronizedMap(new WeakHashMap<String, Class<?>>());
            CACHE_CLASSES.put(classLoader, map);
        }
    }

    Class<?> clazz = map.get(name);
    if (clazz == null) {
        try {
            clazz = Class.forName(name, true, classLoader);
        } catch (ClassNotFoundException e) {
            // Leave a marker that the class isn't found
            map.put(name, NEGATIVE_CACHE_SENTINEL);
            return null;
        }
        // two putters can race here, but they'll put the same class
        map.put(name, clazz);
        return clazz;
    } else if (clazz == NEGATIVE_CACHE_SENTINEL) {
        return null; // not found
    } else {
        // cache hit
        return clazz;
    }
}

---

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