Example usage for java.lang.ref WeakReference WeakReference

Introduction

In this page you can find the example usage for java.lang.ref WeakReference WeakReference.

Prototype

public WeakReference(T referent)

Source Link

Document

Creates a new weak reference that refers to the given object.

Usage

From source file:org.eclipse.hono.service.amqp.AmqpServiceBase.java

/**
 * Processes a peer's AMQP <em>open</em> frame.
 * <p>//from  www .  ja  v a  2s . c o  m
 * This default implementation
 * <ol>
 * <li>adds a unique connection identifier to the connection's attachments
 * under key {@link Constants#KEY_CONNECTION_ID}</li>
 * <li>invokes {@link #processDesiredCapabilities(ProtonConnection, Symbol[])}</li>
 * <li>sets a timer that closes the connection once the client's token
 * has expired</li>
 * <li>sends the AMQP <em>open</em> frame to the peer</li>
 * </ol>
 * 
 * @param connection The connection to open.
 */
protected void processRemoteOpen(final ProtonConnection connection) {

    final HonoUser clientPrincipal = Constants.getClientPrincipal(connection);
    LOG.debug("client [container: {}, user: {}] connected", connection.getRemoteContainer(),
            clientPrincipal.getName());
    // attach an ID so that we can later inform downstream components when connection is closed
    connection.attachments().set(Constants.KEY_CONNECTION_ID, String.class, UUID.randomUUID().toString());
    processDesiredCapabilities(connection, connection.getRemoteDesiredCapabilities());
    final Duration delay = Duration.between(Instant.now(), clientPrincipal.getExpirationTime());
    final WeakReference<ProtonConnection> conRef = new WeakReference<>(connection);
    vertx.setTimer(delay.toMillis(), timerId -> {
        if (conRef.get() != null) {
            closeExpiredConnection(conRef.get());
        }
    });
    connection.open();
}

From source file:com.pdfread.standardreader.net.AsyncHttpClient.java

protected void sendRequest(DefaultHttpClient client, HttpContext httpContext, HttpUriRequest uriRequest,
        String contentType, AsyncHttpResponseHandler responseHandler, Context context) {

    if (contentType != null) {
        uriRequest.addHeader("Content-Type", contentType);
    }// w w w  .jav  a2  s  . c  om

    Future<?> request = threadPool
            .submit(new AsyncHttpRequest(client, httpContext, uriRequest, responseHandler));

    if (context != null) {
        // Add request to request map
        List<WeakReference<Future<?>>> requestList = requestMap.get(context);
        if (requestList == null) {
            requestList = new LinkedList<WeakReference<Future<?>>>();
            requestMap.put(context, requestList);
        }

        requestList.add(new WeakReference<Future<?>>(request));

        // TODO: Remove dead weakrefs from requestLists?
    }
}

From source file:com.google.blockly.model.BlockFactory.java

/**
 * Updates the list of options used by dropdowns in select block types. These fields must be
 * derived from the prototype blocks loaded via JSON (via {@link #obtainBlock}), and where
 * {@link FieldDropdown#setOptions(FieldDropdown.Options)} has not been called. An instance of
 * the block must already exist, usually the prototype loaded via JSON.
 *
 * @param blockType The name for the type of block containing such fields
 * @param fieldName The name of the field within the block.
 * @param optionList The list of {@link FieldDropdown.Option}s used to to set for the
 *                   referenced dropdowns.
 *///from w ww. jav a  2  s.  co  m
public void updateDropdownOptions(String blockType, String fieldName, List<FieldDropdown.Option> optionList) {
    BlockTypeFieldName key = new BlockTypeFieldName(blockType, fieldName);
    WeakReference<FieldDropdown.Options> sharedOptionsRef = mDropdownOptions.get(key);
    FieldDropdown.Options sharedOptions = sharedOptionsRef == null ? null : sharedOptionsRef.get();
    if (sharedOptions == null) {
        sharedOptions = new FieldDropdown.Options(optionList);
        mDropdownOptions.put(key, new WeakReference<>(sharedOptions));
    } else {
        sharedOptions.updateOptions(optionList);
    }
}

From source file:com.xiao.smartband.http.AsyncHttpClient.java

private void sendRequest(DefaultHttpClient client, HttpContext httpContext, HttpUriRequest uriRequest,
        String contentType, AsyncHttpResponseHandler responseHandler, Context context) {
    if (contentType != null) {
        uriRequest.addHeader("Content-Type", contentType);
    }/* w w w  . ja  v a2s.c om*/
    Future<?> request = threadPool
            .submit(new AsyncHttpRequest(client, httpContext, uriRequest, responseHandler));

    if (context != null) {
        // Add request to request map
        List<WeakReference<Future<?>>> requestList = requestMap.get(context);
        if (requestList == null) {
            requestList = new LinkedList<WeakReference<Future<?>>>();
            requestMap.put(context, requestList);
        }

        requestList.add(new WeakReference<Future<?>>(request));

        // TODO: Remove dead weakrefs from requestLists?
    }
}

From source file:com.ytrain.mutrain.utils.asynchttp.AsyncHttpClient.java

protected void sendRequest(DefaultHttpClient client, HttpContext httpContext, HttpUriRequest uriRequest,
        String contentType, AsyncHttpResponseHandler responseHandler, Context context) {
    if (contentType != null) {
        uriRequest.addHeader("Content-Type", contentType);
    }/*from  ww  w. ja  v  a 2  s. c  om*/

    Future<?> request = threadPool
            .submit(new AsyncHttpRequest(client, httpContext, uriRequest, responseHandler));

    if (context != null) {

        List<WeakReference<Future<?>>> requestList = requestMap.get(context);
        if (requestList == null) {
            requestList = new LinkedList<WeakReference<Future<?>>>();
            requestMap.put(context, requestList);
        }

        requestList.add(new WeakReference<Future<?>>(request));

    }
}

From source file:com.rapidminer.gui.new_plotter.engine.jfreechart.link_and_brush.LinkAndBrushChartPanel.java

/**
 * Add a {@link LinkAndBrushSelectionListener}. The listener is saved as a {@link WeakReference}
 * . Thus listener must not be hidden (anonymous) classes!
 *///from w w w . j  a v  a2 s .c o  m
public void addLinkAndBrushSelectionListener(LinkAndBrushSelectionListener l) {
    listeners.add(new WeakReference<LinkAndBrushSelectionListener>(l));
}

From source file:com.mustardgrain.solr.SolrClient.java

private void startAliveCheckExecutor() {
    // double-checked locking, but it's OK because we don't *do* anything
    // with aliveCheckExecutor
    // if it's not null.
    if (aliveCheckExecutor == null) {
        synchronized (this) {
            if (aliveCheckExecutor == null) {
                aliveCheckExecutor = Executors
                        .newSingleThreadScheduledExecutor(new SolrjNamedThreadFactory("aliveCheckExecutor"));
                aliveCheckExecutor.scheduleAtFixedRate(getAliveCheckRunner(new WeakReference<SolrClient>(this)),
                        this.interval, this.interval, TimeUnit.MILLISECONDS);
            }/* w  ww . j  a  v a 2 s. c  o  m*/
        }
    }
}

From source file:org.apache.solr.client.solrj.impl.LBHttpSolrClient.java

private void startAliveCheckExecutor() {
    // double-checked locking, but it's OK because we don't *do* anything with aliveCheckExecutor
    // if it's not null.
    if (aliveCheckExecutor == null) {
        synchronized (this) {
            if (aliveCheckExecutor == null) {
                aliveCheckExecutor = Executors
                        .newSingleThreadScheduledExecutor(new SolrjNamedThreadFactory("aliveCheckExecutor"));
                aliveCheckExecutor.scheduleAtFixedRate(getAliveCheckRunner(new WeakReference<>(this)),
                        this.interval, this.interval, TimeUnit.MILLISECONDS);
            }//from w  w w .j  a  va 2s . c  o  m
        }
    }
}

From source file:net.java.sip.communicator.plugin.notificationwiring.NotificationManager.java

/**
 * Implements CallListener.incomingCallReceived. When a call is received
 * plays the ring phone sound to the user and gathers caller information
 * that may be used by a user-specified command (incomingCall event
 * trigger).//from  w w w . j  a  v  a 2s. c  om
 *
 * @param ev the <tt>CallEvent</tt>
 */
public void incomingCallReceived(CallEvent ev) {
    try {
        Call call = ev.getSourceCall();
        CallPeer peer = call.getCallPeers().next();
        Map<String, String> peerInfo = new HashMap<String, String>();
        String peerName = peer.getDisplayName();

        peerInfo.put("caller.uri", peer.getURI());
        peerInfo.put("caller.address", peer.getAddress());
        peerInfo.put("caller.name", peerName);
        peerInfo.put("caller.id", peer.getPeerID());

        /*
         * The loopCondition will stay with the notification sound until the
         * latter is stopped. If by any chance the sound fails to stop by
         * the time the call is no longer referenced, do try to stop it
         * then. That's why the loopCondition will weakly reference the
         * call.
         */
        final WeakReference<Call> weakCall = new WeakReference<Call>(call);
        NotificationData notification = fireNotification(INCOMING_CALL, "",
                ev.isDesktopStreaming()
                        ? NotificationWiringActivator.getResources()
                                .getI18NString("service.gui.INCOMING_SCREEN_SHARE", new String[] { peerName })
                        : NotificationWiringActivator.getResources().getI18NString("service.gui.INCOMING_CALL",
                                new String[] { peerName }),
                peerInfo, new Callable<Boolean>() {
                    public Boolean call() {
                        Call call = weakCall.get();

                        if (call == null)
                            return false;

                        /*
                         * INCOMING_CALL should be played for a Call
                         * only while there is a CallPeer in the
                         * INCOMING_CALL state.
                         */
                        Iterator<? extends CallPeer> peerIter = call.getCallPeers();
                        boolean loop = false;

                        while (peerIter.hasNext()) {
                            CallPeer peer = peerIter.next();

                            if (CallPeerState.INCOMING_CALL.equals(peer.getState())) {
                                loop = true;
                                break;
                            }
                        }
                        return loop;
                    }
                });

        if (notification != null)
            callNotifications.put(call, notification);

        call.addCallChangeListener(this);

        peer.addCallPeerListener(this);
        peer.addCallPeerSecurityListener(this);
        peer.addCallPeerConferenceListener(this);
    } catch (Throwable t) {
        if (t instanceof ThreadDeath)
            throw (ThreadDeath) t;
        else {
            logger.error("An error occurred while trying to notify" + " about an incoming call", t);
        }
    }
}

From source file:cn.xdf.thinkutils.http2.AsyncHttpClient.java

protected void sendRequest(DefaultHttpClient client, HttpContext httpContext, HttpUriRequest uriRequest,
        String contentType, AsyncHttpResponseHandler responseHandler, Context context) {
    if (contentType != null) {
        uriRequest.addHeader("Content-Type", contentType);
    }// w  w  w  .java 2  s .c  o m

    Future<?> request = threadPool
            .submit(new AsyncHttpRequest(client, httpContext, uriRequest, responseHandler));
    if (context != null) {
        // Add request to request map
        List<WeakReference<Future<?>>> requestList = requestMap.get(context);
        if (requestList == null) {
            requestList = new LinkedList<WeakReference<Future<?>>>();
            requestMap.put(context, requestList);
        }
        requestList.add(new WeakReference<Future<?>>(request));
        // TODO: Remove dead weakrefs from requestLists?
    }

}