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- /*
- * Copyright 2000-2016 Vaadin Ltd.
- *
- * Licensed under the Apache License, Version 2.0 (the "License"); you may not
- * use this file except in compliance with the License. You may obtain a copy of
- * the License at
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
- * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
- * License for the specific language governing permissions and limitations under
- * the License.
- */
- package com.vaadin.client.communication;
-
- import java.util.ArrayList;
- import java.util.Collections;
- import java.util.Date;
- import java.util.HashSet;
- import java.util.Iterator;
- import java.util.List;
- import java.util.Set;
- import java.util.logging.Level;
- import java.util.logging.Logger;
-
- import com.google.gwt.core.client.Duration;
- import com.google.gwt.core.client.GWT;
- import com.google.gwt.core.client.JavaScriptObject;
- import com.google.gwt.core.client.JsArray;
- import com.google.gwt.core.client.JsArrayString;
- import com.google.gwt.core.client.Scheduler;
- import com.google.gwt.core.client.Scheduler.ScheduledCommand;
- import com.google.gwt.user.client.Command;
- import com.google.gwt.user.client.Timer;
- import com.google.gwt.user.client.ui.Widget;
- import com.vaadin.client.ApplicationConfiguration;
- import com.vaadin.client.ApplicationConnection;
- import com.vaadin.client.ApplicationConnection.ApplicationState;
- import com.vaadin.client.ApplicationConnection.MultiStepDuration;
- import com.vaadin.client.ApplicationConnection.ResponseHandlingStartedEvent;
- import com.vaadin.client.ComponentConnector;
- import com.vaadin.client.ConnectorHierarchyChangeEvent;
- import com.vaadin.client.ConnectorMap;
- import com.vaadin.client.FastStringSet;
- import com.vaadin.client.HasComponentsConnector;
- import com.vaadin.client.JsArrayObject;
- import com.vaadin.client.LayoutManager;
- import com.vaadin.client.LocaleService;
- import com.vaadin.client.Paintable;
- import com.vaadin.client.Profiler;
- import com.vaadin.client.ServerConnector;
- import com.vaadin.client.UIDL;
- import com.vaadin.client.Util;
- import com.vaadin.client.VCaption;
- import com.vaadin.client.VConsole;
- import com.vaadin.client.ValueMap;
- import com.vaadin.client.WidgetUtil;
- import com.vaadin.client.extensions.AbstractExtensionConnector;
- import com.vaadin.client.metadata.ConnectorBundleLoader;
- import com.vaadin.client.metadata.NoDataException;
- import com.vaadin.client.metadata.Property;
- import com.vaadin.client.metadata.Type;
- import com.vaadin.client.metadata.TypeData;
- import com.vaadin.client.ui.AbstractConnector;
- import com.vaadin.client.ui.VNotification;
- import com.vaadin.client.ui.dd.VDragAndDropManager;
- import com.vaadin.client.ui.ui.UIConnector;
- import com.vaadin.client.ui.window.WindowConnector;
- import com.vaadin.shared.ApplicationConstants;
- import com.vaadin.shared.communication.MethodInvocation;
- import com.vaadin.shared.communication.SharedState;
-
- import elemental.json.Json;
- import elemental.json.JsonArray;
- import elemental.json.JsonObject;
-
- /**
- * A MessageHandler is responsible for handling all incoming messages (JSON)
- * from the server (state changes, RPCs and other updates) and ensuring that the
- * connectors are updated accordingly.
- *
- * @since 7.6
- * @author Vaadin Ltd
- */
- public class MessageHandler {
-
- public static final String JSON_COMMUNICATION_PREFIX = "for(;;);[";
- public static final String JSON_COMMUNICATION_SUFFIX = "]";
-
- /**
- * Helper used to return two values when updating the connector hierarchy.
- */
- private static class ConnectorHierarchyUpdateResult {
- /**
- * Needed at a later point when the created events are fired
- */
- private JsArrayObject<ConnectorHierarchyChangeEvent> events = JavaScriptObject
- .createArray().cast();
- /**
- * Needed to know where captions might need to get updated
- */
- private FastStringSet parentChangedIds = FastStringSet.create();
-
- /**
- * Connectors for which the parent has been set to null
- */
- private FastStringSet detachedConnectorIds = FastStringSet.create();
- }
-
- /** The max timeout that response handling may be suspended */
- private static final int MAX_SUSPENDED_TIMEOUT = 5000;
-
- /**
- * The value of an undefined sync id.
- * <p>
- * This must be <code>-1</code>, because of the contract in
- * {@link #getLastSeenServerSyncId()}
- */
- private static final int UNDEFINED_SYNC_ID = -1;
-
- /**
- * If responseHandlingLocks contains any objects, response handling is
- * suspended until the collection is empty or a timeout has occurred.
- */
- private Set<Object> responseHandlingLocks = new HashSet<>();
-
- /**
- * Contains all UIDL messages received while response handling is suspended
- */
- private List<PendingUIDLMessage> pendingUIDLMessages = new ArrayList<>();
-
- // will hold the CSRF token once received
- private String csrfToken = ApplicationConstants.CSRF_TOKEN_DEFAULT_VALUE;
-
- /** Timer for automatic redirect to SessionExpiredURL */
- private Timer redirectTimer;
-
- /** redirectTimer scheduling interval in seconds */
- private int sessionExpirationInterval;
-
- /**
- * Holds the time spent rendering the last request
- */
- protected int lastProcessingTime;
-
- /**
- * Holds the total time spent rendering requests during the lifetime of the
- * session.
- */
- protected int totalProcessingTime;
-
- /**
- * Holds the time it took to load the page and render the first view. -2
- * means that this value has not yet been calculated because the first view
- * has not yet been rendered (or that your browser is very fast). -1 means
- * that the browser does not support the performance.timing feature used to
- * get this measurement.
- *
- * Note: also used for tracking whether the first UIDL has been handled
- */
- private int bootstrapTime = 0;
-
- /**
- * true if state updates are currently being done
- */
- private boolean updatingState = false;
-
- /**
- * Holds the timing information from the server-side. How much time was
- * spent servicing the last request and how much time has been spent
- * servicing the session so far. These values are always one request behind,
- * since they cannot be measured before the request is finished.
- */
- private ValueMap serverTimingInfo;
-
- /**
- * Holds the last seen response id given by the server.
- * <p>
- * The server generates a strictly increasing id for each response to each
- * request from the client. This ID is then replayed back to the server on
- * each request. This helps the server in knowing in what state the client
- * is, and compare it to its own state. In short, it helps with concurrent
- * changes between the client and server.
- * <p>
- * Initial value, i.e. no responses received from the server, is
- * {@link #UNDEFINED_SYNC_ID} ({@value #UNDEFINED_SYNC_ID}). This happens
- * between the bootstrap HTML being loaded and the first UI being rendered;
- */
- private int lastSeenServerSyncId = UNDEFINED_SYNC_ID;
-
- private ApplicationConnection connection;
-
- /**
- * Data structure holding information about pending UIDL messages.
- */
- private static class PendingUIDLMessage {
- private ValueMap json;
-
- public PendingUIDLMessage(ValueMap json) {
- this.json = json;
- }
-
- public ValueMap getJson() {
- return json;
- }
- }
-
- /**
- * Sets the application connection this instance is connected to. Called
- * internally by the framework.
- *
- * @param connection
- * the application connection this instance is connected to
- */
- public void setConnection(ApplicationConnection connection) {
- this.connection = connection;
- }
-
- private static Logger getLogger() {
- return Logger.getLogger(MessageHandler.class.getName());
- }
-
- /**
- * Handles a received UIDL JSON text, parsing it, and passing it on to the
- * appropriate handlers, while logging timing information.
- *
- * @param jsonText
- * The JSON to handle
- */
- public void handleMessage(final ValueMap json) {
- if (json == null) {
- throw new IllegalArgumentException(
- "The json to handle cannot be null");
- }
- if (getServerId(json) == -1) {
- getLogger().severe("Response didn't contain a server id. "
- + "Please verify that the server is up-to-date and that the response data has not been modified in transmission.");
- }
-
- if (connection.getApplicationState() == ApplicationState.RUNNING) {
- handleJSON(json);
- } else if (connection
- .getApplicationState() == ApplicationState.INITIALIZING) {
- // Application is starting up for the first time
- connection.setApplicationRunning(true);
- connection.executeWhenCSSLoaded(new Command() {
- @Override
- public void execute() {
- handleJSON(json);
- }
- });
- } else {
- getLogger().warning(
- "Ignored received message because application has already been stopped");
- return;
- }
- }
-
- protected void handleJSON(final ValueMap json) {
- final int serverId = getServerId(json);
-
- if (isResynchronize(json) && !isNextExpectedMessage(serverId)) {
- // Resynchronize request. We must remove any old pending
- // messages and ensure this is handled next. Otherwise we
- // would keep waiting for an older message forever (if this
- // is triggered by forceHandleMessage)
- getLogger().info("Received resync message with id " + serverId
- + " while waiting for " + getExpectedServerId());
- lastSeenServerSyncId = serverId - 1;
- removeOldPendingMessages();
- }
-
- boolean locked = !responseHandlingLocks.isEmpty();
-
- if (locked || !isNextExpectedMessage(serverId)) {
- // Cannot or should not handle this message right now, either
- // because of locks or because it's an out-of-order message
-
- if (locked) {
- // Some component is doing something that can't be interrupted
- // (e.g. animation that should be smooth). Enqueue the UIDL
- // message for later processing.
- getLogger().info("Postponing UIDL handling due to lock...");
- } else {
- // Unexpected server id
- if (serverId <= lastSeenServerSyncId) {
- // Why is the server re-sending an old package? Ignore it
- getLogger().warning("Received message with server id "
- + serverId + " but have already seen "
- + lastSeenServerSyncId + ". Ignoring it");
- endRequestIfResponse(json);
- return;
- }
-
- // We are waiting for an earlier message...
- getLogger().info("Received message with server id " + serverId
- + " but expected " + getExpectedServerId()
- + ". Postponing handling until the missing message(s) have been received");
- }
- pendingUIDLMessages.add(new PendingUIDLMessage(json));
- if (!forceHandleMessage.isRunning()) {
- forceHandleMessage.schedule(MAX_SUSPENDED_TIMEOUT);
- }
- return;
- }
-
- final Date start = new Date();
- /*
- * Lock response handling to avoid a situation where something pushed
- * from the server gets processed while waiting for e.g. lazily loaded
- * connectors that are needed for processing the current message.
- */
- final Object lock = new Object();
- suspendReponseHandling(lock);
-
- getLogger().info("Handling message from server");
- connection.fireEvent(new ResponseHandlingStartedEvent(connection));
-
- // Client id must be updated before server id, as server id update can
- // cause a resync (which must use the updated id)
- if (json.containsKey(ApplicationConstants.CLIENT_TO_SERVER_ID)) {
- int serverNextExpected = json
- .getInt(ApplicationConstants.CLIENT_TO_SERVER_ID);
- getMessageSender().setClientToServerMessageId(serverNextExpected,
- isResynchronize(json));
- }
-
- if (serverId != -1) {
- /*
- * Use sync id unless explicitly set as undefined, as is done by
- * e.g. critical server-side notifications
- */
- lastSeenServerSyncId = serverId;
- }
-
- // Handle redirect
- if (json.containsKey("redirect")) {
- String url = json.getValueMap("redirect").getString("url");
- getLogger().info("redirecting to " + url);
- WidgetUtil.redirect(url);
- return;
- }
-
- final MultiStepDuration handleUIDLDuration = new MultiStepDuration();
-
- // Get security key
- if (json.containsKey(ApplicationConstants.UIDL_SECURITY_TOKEN_ID)) {
- csrfToken = json
- .getString(ApplicationConstants.UIDL_SECURITY_TOKEN_ID);
- }
- getLogger().info(" * Handling resources from server");
-
- if (json.containsKey("resources")) {
- ValueMap resources = json.getValueMap("resources");
- JsArrayString keyArray = resources.getKeyArray();
- int l = keyArray.length();
- for (int i = 0; i < l; i++) {
- String key = keyArray.get(i);
- connection.setResource(key, resources.getAsString(key));
- }
- }
- handleUIDLDuration
- .logDuration(" * Handling resources from server completed", 10);
-
- getLogger().info(" * Handling type inheritance map from server");
-
- if (json.containsKey("typeInheritanceMap")) {
- connection.getConfiguration().addComponentInheritanceInfo(
- json.getValueMap("typeInheritanceMap"));
- }
- handleUIDLDuration.logDuration(
- " * Handling type inheritance map from server completed", 10);
-
- getLogger().info("Handling type mappings from server");
-
- if (json.containsKey("typeMappings")) {
- connection.getConfiguration().addComponentMappings(
- json.getValueMap("typeMappings"),
- connection.getWidgetSet());
-
- }
-
- getLogger().info("Handling resource dependencies");
- connection.getDependencyLoader().loadDependencies(json);
-
- handleUIDLDuration.logDuration(
- " * Handling type mappings from server completed", 10);
- /*
- * Hook for e.g. TestBench to get details about server peformance
- */
- if (json.containsKey("timings")) {
- serverTimingInfo = json.getValueMap("timings");
- }
-
- Command c = new Command() {
- private boolean onlyNoLayoutUpdates = true;
-
- @Override
- public void execute() {
- assert serverId == -1 || serverId == lastSeenServerSyncId;
-
- handleUIDLDuration.logDuration(" * Loading widgets completed",
- 10);
-
- Profiler.enter("Handling meta information");
- ValueMap meta = null;
- if (json.containsKey("meta")) {
- getLogger().info(" * Handling meta information");
- meta = json.getValueMap("meta");
- if (meta.containsKey("repaintAll")) {
- prepareRepaintAll();
- }
- if (meta.containsKey("timedRedirect")) {
- final ValueMap timedRedirect = meta
- .getValueMap("timedRedirect");
- if (redirectTimer != null) {
- redirectTimer.cancel();
- }
- redirectTimer = new Timer() {
- @Override
- public void run() {
- WidgetUtil.redirect(
- timedRedirect.getString("url"));
- }
- };
- sessionExpirationInterval = timedRedirect
- .getInt("interval");
- }
- }
- Profiler.leave("Handling meta information");
-
- if (redirectTimer != null) {
- redirectTimer.schedule(1000 * sessionExpirationInterval);
- }
-
- updatingState = true;
-
- double processUidlStart = Duration.currentTimeMillis();
-
- // Ensure that all connectors that we are about to update exist
- JsArrayString createdConnectorIds = createConnectorsIfNeeded(
- json);
-
- // Update states, do not fire events
- JsArrayObject<StateChangeEvent> pendingStateChangeEvents = updateConnectorState(
- json, createdConnectorIds);
-
- /*
- * Doing this here so that locales are available also to the
- * connectors which get a state change event before the UI.
- */
- Profiler.enter("Handling locales");
- getLogger().info(" * Handling locales");
- // Store locale data
- LocaleService.addLocales(getUIConnector()
- .getState().localeServiceState.localeData);
- Profiler.leave("Handling locales");
-
- // Update hierarchy, do not fire events
- ConnectorHierarchyUpdateResult connectorHierarchyUpdateResult = updateConnectorHierarchy(
- json);
-
- // Fire hierarchy change events
- sendHierarchyChangeEvents(
- connectorHierarchyUpdateResult.events);
-
- updateCaptions(pendingStateChangeEvents,
- connectorHierarchyUpdateResult.parentChangedIds);
-
- delegateToWidget(pendingStateChangeEvents);
-
- // Fire state change events.
- sendStateChangeEvents(pendingStateChangeEvents);
-
- // Update of legacy (UIDL) style connectors
- updateVaadin6StyleConnectors(json);
-
- // Handle any RPC invocations done on the server side
- handleRpcInvocations(json);
-
- if (json.containsKey("dd")) {
- // response contains data for drag and drop service
- VDragAndDropManager.get()
- .handleServerResponse(json.getValueMap("dd"));
- }
-
- unregisterRemovedConnectors(
- connectorHierarchyUpdateResult.detachedConnectorIds);
-
- getLogger().info("handleUIDLMessage: "
- + (Duration.currentTimeMillis() - processUidlStart)
- + " ms");
-
- updatingState = false;
-
- Profiler.enter("Layout processing");
- try {
- LayoutManager layoutManager = getLayoutManager();
- if (!onlyNoLayoutUpdates) {
- layoutManager.setEverythingNeedsMeasure();
- }
- if (layoutManager.isLayoutNeeded()) {
- layoutManager.layoutNow();
- }
- } catch (final Throwable e) {
- getLogger().log(Level.SEVERE, "Error processing layouts",
- e);
- }
- Profiler.leave("Layout processing");
-
- if (ApplicationConfiguration.isDebugMode()) {
- Profiler.enter("Dumping state changes to the console");
- getLogger().info(" * Dumping state changes to the console");
- VConsole.dirUIDL(json, connection);
- Profiler.leave("Dumping state changes to the console");
- }
-
- if (meta != null) {
- Profiler.enter("Error handling");
- if (meta.containsKey("appError")) {
- ValueMap error = meta.getValueMap("appError");
-
- VNotification.showError(connection,
- error.getString("caption"),
- error.getString("message"),
- error.getString("details"),
- error.getString("url"));
-
- connection.setApplicationRunning(false);
- }
- Profiler.leave("Error handling");
- }
-
- // TODO build profiling for widget impl loading time
-
- lastProcessingTime = (int) ((new Date().getTime())
- - start.getTime());
- totalProcessingTime += lastProcessingTime;
- if (bootstrapTime == 0) {
-
- double fetchStart = getFetchStartTime();
- if (fetchStart != 0) {
- int time = (int) (Duration.currentTimeMillis()
- - fetchStart);
- getLogger().log(Level.INFO, "First response processed "
- + time + " ms after fetchStart");
- }
-
- bootstrapTime = calculateBootstrapTime();
- if (Profiler.isEnabled() && bootstrapTime != -1) {
- Profiler.logBootstrapTimings();
- }
- }
-
- getLogger().info(" Processing time was "
- + String.valueOf(lastProcessingTime) + "ms");
- getLogger().info(
- "Referenced paintables: " + getConnectorMap().size());
-
- endRequestIfResponse(json);
- resumeResponseHandling(lock);
-
- ConnectorBundleLoader.get().ensureDeferredBundleLoaded();
-
- if (Profiler.isEnabled()) {
- Scheduler.get().scheduleDeferred(new ScheduledCommand() {
- @Override
- public void execute() {
- Profiler.logTimings();
- Profiler.reset();
- }
- });
- }
- }
-
- /**
- * Properly clean up any old stuff to ensure everything is properly
- * reinitialized.
- */
- private void prepareRepaintAll() {
- String uiConnectorId = getUIConnector().getConnectorId();
- if (uiConnectorId == null) {
- // Nothing to clear yet
- return;
- }
-
- // Create fake server response that says that the uiConnector
- // has no children
- JsonObject fakeHierarchy = Json.createObject();
- fakeHierarchy.put(uiConnectorId, Json.createArray());
- JsonObject fakeJson = Json.createObject();
- fakeJson.put("hierarchy", fakeHierarchy);
- ValueMap fakeValueMap = ((JavaScriptObject) fakeJson.toNative())
- .cast();
-
- // Update hierarchy based on the fake response
- ConnectorHierarchyUpdateResult connectorHierarchyUpdateResult = updateConnectorHierarchy(
- fakeValueMap);
-
- // Send hierarchy events based on the fake update
- sendHierarchyChangeEvents(
- connectorHierarchyUpdateResult.events);
-
- // Unregister all the old connectors that have now been removed
- unregisterRemovedConnectors(
- connectorHierarchyUpdateResult.detachedConnectorIds);
- }
-
- private void updateCaptions(
- JsArrayObject<StateChangeEvent> pendingStateChangeEvents,
- FastStringSet parentChangedIds) {
- Profiler.enter("updateCaptions");
-
- /*
- * Find all components that might need a caption update based on
- * pending state and hierarchy changes
- */
- FastStringSet needsCaptionUpdate = FastStringSet.create();
- needsCaptionUpdate.addAll(parentChangedIds);
-
- // Find components with potentially changed caption state
- int size = pendingStateChangeEvents.size();
- for (int i = 0; i < size; i++) {
- StateChangeEvent event = pendingStateChangeEvents.get(i);
- if (VCaption.mightChange(event)) {
- ServerConnector connector = event.getConnector();
- needsCaptionUpdate.add(connector.getConnectorId());
- }
- }
-
- ConnectorMap connectorMap = getConnectorMap();
-
- // Update captions for all suitable candidates
- JsArrayString dump = needsCaptionUpdate.dump();
- int needsUpdateLength = dump.length();
- for (int i = 0; i < needsUpdateLength; i++) {
- String childId = dump.get(i);
- ServerConnector child = connectorMap.getConnector(childId);
-
- if (child instanceof ComponentConnector
- && ((ComponentConnector) child)
- .delegateCaptionHandling()) {
- ServerConnector parent = child.getParent();
- if (parent instanceof HasComponentsConnector) {
- Profiler.enter(
- "HasComponentsConnector.updateCaption");
- ((HasComponentsConnector) parent)
- .updateCaption((ComponentConnector) child);
- Profiler.leave(
- "HasComponentsConnector.updateCaption");
- }
- }
- }
-
- Profiler.leave("updateCaptions");
- }
-
- private void delegateToWidget(
- JsArrayObject<StateChangeEvent> pendingStateChangeEvents) {
- Profiler.enter("@DelegateToWidget");
-
- getLogger().info(" * Running @DelegateToWidget");
-
- // Keep track of types that have no @DelegateToWidget in their
- // state to optimize performance
- FastStringSet noOpTypes = FastStringSet.create();
-
- int size = pendingStateChangeEvents.size();
- for (int eventIndex = 0; eventIndex < size; eventIndex++) {
- StateChangeEvent sce = pendingStateChangeEvents
- .get(eventIndex);
- ServerConnector connector = sce.getConnector();
- if (connector instanceof ComponentConnector) {
- String className = connector.getClass().getName();
- if (noOpTypes.contains(className)) {
- continue;
- }
- ComponentConnector component = (ComponentConnector) connector;
-
- Type stateType = AbstractConnector
- .getStateType(component);
- JsArrayString delegateToWidgetProperties = stateType
- .getDelegateToWidgetProperties();
- if (delegateToWidgetProperties == null) {
- noOpTypes.add(className);
- continue;
- }
-
- int length = delegateToWidgetProperties.length();
- for (int i = 0; i < length; i++) {
- String propertyName = delegateToWidgetProperties
- .get(i);
- if (sce.hasPropertyChanged(propertyName)) {
- Property property = stateType
- .getProperty(propertyName);
- String method = property
- .getDelegateToWidgetMethodName();
- Profiler.enter("doDelegateToWidget");
- doDelegateToWidget(component, property, method);
- Profiler.leave("doDelegateToWidget");
- }
- }
-
- }
- }
-
- Profiler.leave("@DelegateToWidget");
- }
-
- private void doDelegateToWidget(ComponentConnector component,
- Property property, String methodName) {
- Type type = TypeData.getType(component.getClass());
- try {
- Type widgetType = type.getMethod("getWidget")
- .getReturnType();
- Widget widget = component.getWidget();
-
- Object propertyValue = property
- .getValue(component.getState());
-
- widgetType.getMethod(methodName).invoke(widget,
- propertyValue);
- } catch (NoDataException e) {
- throw new RuntimeException(
- "Missing data needed to invoke @DelegateToWidget for "
- + component.getClass().getSimpleName(),
- e);
- }
- }
-
- /**
- * Sends the state change events created while updating the state
- * information.
- *
- * This must be called after hierarchy change listeners have been
- * called. At least caption updates for the parent are strange if
- * fired from state change listeners and thus calls the parent
- * BEFORE the parent is aware of the child (through a
- * ConnectorHierarchyChangedEvent)
- *
- * @param pendingStateChangeEvents
- * The events to send
- */
- private void sendStateChangeEvents(
- JsArrayObject<StateChangeEvent> pendingStateChangeEvents) {
- Profiler.enter("sendStateChangeEvents");
- getLogger().info(" * Sending state change events");
-
- int size = pendingStateChangeEvents.size();
- for (int i = 0; i < size; i++) {
- StateChangeEvent sce = pendingStateChangeEvents.get(i);
- try {
- sce.getConnector().fireEvent(sce);
- } catch (final Throwable e) {
- getLogger().log(Level.SEVERE,
- "Error sending state change events", e);
- }
- }
-
- Profiler.leave("sendStateChangeEvents");
- }
-
- private void verifyConnectorHierarchy() {
- Profiler.enter(
- "verifyConnectorHierarchy - this is only performed in debug mode");
-
- JsArrayObject<ServerConnector> currentConnectors = getConnectorMap()
- .getConnectorsAsJsArray();
- int size = currentConnectors.size();
- for (int i = 0; i < size; i++) {
- ServerConnector c = currentConnectors.get(i);
- if (c.getParent() != null) {
- if (!c.getParent().getChildren().contains(c)) {
- getLogger().severe("ERROR: Connector "
- + c.getConnectorId()
- + " is connected to a parent but the parent ("
- + c.getParent().getConnectorId()
- + ") does not contain the connector");
- }
- } else if (c == getUIConnector()) {
- // UIConnector for this connection, ignore
- } else if (c instanceof WindowConnector && getUIConnector()
- .hasSubWindow((WindowConnector) c)) {
- // Sub window attached to this UIConnector, ignore
- } else {
- // The connector has been detached from the
- // hierarchy but was not unregistered.
- getLogger().severe("ERROR: Connector "
- + c.getConnectorId()
- + " is not attached to a parent but has not been unregistered");
- }
-
- }
-
- Profiler.leave(
- "verifyConnectorHierarchy - this is only performed in debug mode");
- }
-
- private void unregisterRemovedConnectors(
- FastStringSet detachedConnectors) {
- Profiler.enter("unregisterRemovedConnectors");
-
- JsArrayString detachedArray = detachedConnectors.dump();
- for (int i = 0; i < detachedArray.length(); i++) {
- ServerConnector connector = getConnectorMap().getConnector(
- detachedArray.get(i));
-
- Profiler.enter(
- "unregisterRemovedConnectors unregisterConnector");
- getConnectorMap().unregisterConnector(connector);
- Profiler.leave(
- "unregisterRemovedConnectors unregisterConnector");
- }
-
- if (ApplicationConfiguration.isDebugMode()) {
- // Do some extra checking if we're in debug mode (i.e. debug
- // window is open)
- verifyConnectorHierarchy();
- }
-
- getLogger().info("* Unregistered " + detachedArray.length()
- + " connectors");
- Profiler.leave("unregisterRemovedConnectors");
- }
-
- private JsArrayString createConnectorsIfNeeded(ValueMap json) {
- getLogger().info(" * Creating connectors (if needed)");
-
- JsArrayString createdConnectors = JavaScriptObject.createArray()
- .cast();
- if (!json.containsKey("types")) {
- return createdConnectors;
- }
-
- Profiler.enter("Creating connectors");
-
- ValueMap types = json.getValueMap("types");
- JsArrayString keyArray = types.getKeyArray();
- for (int i = 0; i < keyArray.length(); i++) {
- try {
- String connectorId = keyArray.get(i);
- ServerConnector connector = getConnectorMap()
- .getConnector(connectorId);
- if (connector != null) {
- continue;
- }
-
- // Always do layouts if there's at least one new
- // connector
- onlyNoLayoutUpdates = false;
-
- int connectorType = Integer
- .parseInt(types.getString(connectorId));
-
- Class<? extends ServerConnector> connectorClass = connection
- .getConfiguration()
- .getConnectorClassByEncodedTag(connectorType);
-
- // Connector does not exist so we must create it
- if (connectorClass != getUIConnector().getClass()) {
- // create, initialize and register the paintable
- Profiler.enter(
- "ApplicationConnection.getConnector");
- connector = connection.getConnector(connectorId,
- connectorType);
- Profiler.leave(
- "ApplicationConnection.getConnector");
-
- createdConnectors.push(connectorId);
- } else {
- // First UIConnector update. Before this the
- // UIConnector has been created but not
- // initialized as the connector id has not been
- // known
- getConnectorMap().registerConnector(connectorId,
- getUIConnector());
- getUIConnector().doInit(connectorId, connection);
- createdConnectors.push(connectorId);
- }
- } catch (final Throwable e) {
- getLogger().log(Level.SEVERE,
- "Error handling type data", e);
- }
- }
-
- Profiler.leave("Creating connectors");
-
- return createdConnectors;
- }
-
- private void updateVaadin6StyleConnectors(ValueMap json) {
- Profiler.enter("updateVaadin6StyleConnectors");
-
- JsArray<ValueMap> changes = json.getJSValueMapArray("changes");
- int length = changes.length();
-
- // Must always do layout if there's even a single legacy update
- if (length != 0) {
- onlyNoLayoutUpdates = false;
- }
-
- getLogger()
- .info(" * Passing UIDL to Vaadin 6 style connectors");
- // update paintables
- for (int i = 0; i < length; i++) {
- try {
- final UIDL change = changes.get(i).cast();
- final UIDL uidl = change.getChildUIDL(0);
- String connectorId = uidl.getId();
-
- final ComponentConnector legacyConnector = (ComponentConnector) getConnectorMap()
- .getConnector(connectorId);
- if (legacyConnector instanceof Paintable) {
- String key = null;
- if (Profiler.isEnabled()) {
- key = "updateFromUIDL for " + legacyConnector
- .getClass().getSimpleName();
- Profiler.enter(key);
- }
-
- ((Paintable) legacyConnector).updateFromUIDL(uidl,
- connection);
-
- if (Profiler.isEnabled()) {
- Profiler.leave(key);
- }
- } else if (legacyConnector == null) {
- getLogger().severe(
- "Received update for " + uidl.getTag()
- + ", but there is no such paintable ("
- + connectorId + ") rendered.");
- } else {
- getLogger()
- .severe("Server sent Vaadin 6 style updates for "
- + Util.getConnectorString(
- legacyConnector)
- + " but this is not a Vaadin 6 Paintable");
- }
-
- } catch (final Throwable e) {
- getLogger().log(Level.SEVERE, "Error handling UIDL", e);
- }
- }
-
- Profiler.leave("updateVaadin6StyleConnectors");
- }
-
- private void sendHierarchyChangeEvents(
- JsArrayObject<ConnectorHierarchyChangeEvent> events) {
- int eventCount = events.size();
- if (eventCount == 0) {
- return;
- }
- Profiler.enter("sendHierarchyChangeEvents");
-
- getLogger().info(" * Sending hierarchy change events");
- for (int i = 0; i < eventCount; i++) {
- ConnectorHierarchyChangeEvent event = events.get(i);
- try {
- logHierarchyChange(event);
- event.getConnector().fireEvent(event);
- } catch (final Throwable e) {
- getLogger().log(Level.SEVERE,
- "Error sending hierarchy change events", e);
- }
- }
-
- Profiler.leave("sendHierarchyChangeEvents");
- }
-
- private void logHierarchyChange(
- ConnectorHierarchyChangeEvent event) {
- if (true) {
- // Always disabled for now. Can be enabled manually
- return;
- }
-
- getLogger().info("Hierarchy changed for "
- + Util.getConnectorString(event.getConnector()));
- String oldChildren = "* Old children: ";
- for (ComponentConnector child : event.getOldChildren()) {
- oldChildren += Util.getConnectorString(child) + " ";
- }
- getLogger().info(oldChildren);
-
- String newChildren = "* New children: ";
- HasComponentsConnector parent = (HasComponentsConnector) event
- .getConnector();
- for (ComponentConnector child : parent.getChildComponents()) {
- newChildren += Util.getConnectorString(child) + " ";
- }
- getLogger().info(newChildren);
- }
-
- private JsArrayObject<StateChangeEvent> updateConnectorState(
- ValueMap json, JsArrayString createdConnectorIds) {
- JsArrayObject<StateChangeEvent> events = JavaScriptObject
- .createArray().cast();
- getLogger().info(" * Updating connector states");
- if (!json.containsKey("state")) {
- return events;
- }
-
- Profiler.enter("updateConnectorState");
-
- FastStringSet remainingNewConnectors = FastStringSet.create();
- remainingNewConnectors.addAll(createdConnectorIds);
-
- // set states for all paintables mentioned in "state"
- ValueMap states = json.getValueMap("state");
- JsArrayString keyArray = states.getKeyArray();
- for (int i = 0; i < keyArray.length(); i++) {
- try {
- String connectorId = keyArray.get(i);
- ServerConnector connector = getConnectorMap()
- .getConnector(connectorId);
- if (null != connector) {
- Profiler.enter("updateConnectorState inner loop");
- if (Profiler.isEnabled()) {
- Profiler.enter("Decode connector state "
- + connector.getClass().getSimpleName());
- }
-
- JavaScriptObject jso = states
- .getJavaScriptObject(connectorId);
- JsonObject stateJson = Util.jso2json(jso);
-
- if (connector instanceof HasJavaScriptConnectorHelper) {
- ((HasJavaScriptConnectorHelper) connector)
- .getJavascriptConnectorHelper()
- .setNativeState(jso);
- }
-
- SharedState state = connector.getState();
- Type stateType = new Type(
- state.getClass().getName(), null);
-
- if (onlyNoLayoutUpdates) {
- Profiler.enter(
- "updateConnectorState @NoLayout handling");
- for (String propertyName : stateJson.keys()) {
- Property property = stateType
- .getProperty(propertyName);
- if (!property.isNoLayout()) {
- onlyNoLayoutUpdates = false;
- break;
- }
- }
- Profiler.leave(
- "updateConnectorState @NoLayout handling");
- }
-
- Profiler.enter("updateConnectorState decodeValue");
- JsonDecoder.decodeValue(stateType, stateJson, state,
- connection);
- Profiler.leave("updateConnectorState decodeValue");
-
- if (Profiler.isEnabled()) {
- Profiler.leave("Decode connector state "
- + connector.getClass().getSimpleName());
- }
-
- Profiler.enter("updateConnectorState create event");
-
- boolean isNewConnector = remainingNewConnectors
- .contains(connectorId);
- if (isNewConnector) {
- remainingNewConnectors.remove(connectorId);
- }
-
- StateChangeEvent event = new StateChangeEvent(
- connector, stateJson, isNewConnector);
- events.add(event);
- Profiler.leave("updateConnectorState create event");
-
- Profiler.leave("updateConnectorState inner loop");
- }
- } catch (final Throwable e) {
- getLogger().log(Level.SEVERE,
- "Error updating connector states", e);
- }
- }
-
- Profiler.enter("updateConnectorState newWithoutState");
- // Fire events for properties using the default value for newly
- // created connectors even if there were no state changes
- JsArrayString dump = remainingNewConnectors.dump();
- int length = dump.length();
- for (int i = 0; i < length; i++) {
- String connectorId = dump.get(i);
- ServerConnector connector = getConnectorMap()
- .getConnector(connectorId);
-
- StateChangeEvent event = new StateChangeEvent(connector,
- Json.createObject(), true);
-
- events.add(event);
-
- }
- Profiler.leave("updateConnectorState newWithoutState");
-
- Profiler.leave("updateConnectorState");
-
- return events;
- }
-
- /**
- * Updates the connector hierarchy and returns a list of events that
- * should be fired after update of the hierarchy and the state is
- * done.
- *
- * @param json
- * The JSON containing the hierarchy information
- * @return A collection of events that should be fired when update
- * of hierarchy and state is complete and a list of all
- * connectors for which the parent has changed
- */
- private ConnectorHierarchyUpdateResult updateConnectorHierarchy(
- ValueMap json) {
- ConnectorHierarchyUpdateResult result = new ConnectorHierarchyUpdateResult();
-
- getLogger().info(" * Updating connector hierarchy");
-
- Profiler.enter("updateConnectorHierarchy");
-
- FastStringSet maybeDetached = FastStringSet.create();
- FastStringSet hasHierarchy = FastStringSet.create();
-
- // Process regular hierarchy data
- if (json.containsKey("hierarchy")) {
- ValueMap hierarchies = json.getValueMap("hierarchy");
- JsArrayString hierarchyKeys = hierarchies.getKeyArray();
- for (int i = 0; i < hierarchyKeys.length(); i++) {
- String connectorId = hierarchyKeys.get(i);
- JsArrayString childConnectorIds = hierarchies
- .getJSStringArray(connectorId);
- hasHierarchy.add(connectorId);
-
- updateConnectorHierarchy(connectorId, childConnectorIds,
- maybeDetached, result);
- }
- }
-
- // Assume empty hierarchy for connectors with state updates but
- // no hierarchy data
- if (json.containsKey("state")) {
- JsArrayString stateKeys = json.getValueMap("state")
- .getKeyArray();
-
- JsArrayString emptyArray = JavaScriptObject.createArray()
- .cast();
-
- for (int i = 0; i < stateKeys.length(); i++) {
- String connectorId = stateKeys.get(i);
- if (!hasHierarchy.contains(connectorId)) {
- updateConnectorHierarchy(connectorId, emptyArray,
- maybeDetached, result);
- }
- }
- }
-
- Profiler.enter(
- "updateConnectorHierarchy detach removed connectors");
-
- /*
- * Connector is in maybeDetached at this point if it has been
- * removed from its parent but not added to any other parent
- */
- JsArrayString maybeDetachedArray = maybeDetached.dump();
- for (int i = 0; i < maybeDetachedArray.length(); i++) {
- ServerConnector removed = getConnectorMap()
- .getConnector(maybeDetachedArray.get(i));
- recursivelyDetach(removed, result.events,
- result.detachedConnectorIds);
- }
-
- Profiler.leave(
- "updateConnectorHierarchy detach removed connectors");
-
- if (result.events.size() != 0) {
- onlyNoLayoutUpdates = false;
- }
-
- Profiler.leave("updateConnectorHierarchy");
-
- return result;
-
- }
-
- /**
- * Updates the hierarchy for a connector
- *
- * @param connectorId
- * the id of the connector to update
- * @param childConnectorIds
- * array of child connector ids
- * @param maybeDetached
- * set of connectors that are maybe detached
- * @param result
- * the hierarchy update result
- */
- private void updateConnectorHierarchy(String connectorId,
- JsArrayString childConnectorIds,
- FastStringSet maybeDetached,
- ConnectorHierarchyUpdateResult result) {
- try {
- Profiler.enter("updateConnectorHierarchy hierarchy entry");
-
- ConnectorMap connectorMap = getConnectorMap();
-
- ServerConnector parentConnector = connectorMap
- .getConnector(connectorId);
- int childConnectorSize = childConnectorIds.length();
-
- Profiler.enter(
- "updateConnectorHierarchy find new connectors");
-
- List<ServerConnector> newChildren = new ArrayList<>();
- List<ComponentConnector> newComponents = new ArrayList<>();
- for (int connectorIndex = 0; connectorIndex < childConnectorSize; connectorIndex++) {
- String childConnectorId = childConnectorIds
- .get(connectorIndex);
- ServerConnector childConnector = connectorMap
- .getConnector(childConnectorId);
- if (childConnector == null) {
- getLogger().severe("Hierarchy claims that "
- + childConnectorId + " is a child for "
- + connectorId + " ("
- + parentConnector.getClass().getName()
- + ") but no connector with id "
- + childConnectorId
- + " has been registered. "
- + "More information might be available in the server-side log if assertions are enabled");
- continue;
- }
- newChildren.add(childConnector);
- if (childConnector instanceof ComponentConnector) {
- newComponents
- .add((ComponentConnector) childConnector);
- } else if (!(childConnector instanceof AbstractExtensionConnector)) {
- throw new IllegalStateException(Util
- .getConnectorString(childConnector)
- + " is not a ComponentConnector nor an AbstractExtensionConnector");
- }
- if (childConnector.getParent() != parentConnector) {
- childConnector.setParent(parentConnector);
- result.parentChangedIds.add(childConnectorId);
- // Not detached even if previously removed from
- // parent
- maybeDetached.remove(childConnectorId);
- }
- }
-
- Profiler.leave(
- "updateConnectorHierarchy find new connectors");
-
- // TODO This check should be done on the server side in
- // the future so the hierarchy update is only sent when
- // something actually has changed
- List<ServerConnector> oldChildren = parentConnector
- .getChildren();
- boolean actuallyChanged = !Util
- .collectionsEquals(oldChildren, newChildren);
-
- if (!actuallyChanged) {
- return;
- }
-
- Profiler.enter(
- "updateConnectorHierarchy handle HasComponentsConnector");
-
- if (parentConnector instanceof HasComponentsConnector) {
- HasComponentsConnector ccc = (HasComponentsConnector) parentConnector;
- List<ComponentConnector> oldComponents = ccc
- .getChildComponents();
- if (!Util.collectionsEquals(oldComponents,
- newComponents)) {
- // Fire change event if the hierarchy has
- // changed
- ConnectorHierarchyChangeEvent event = GWT.create(
- ConnectorHierarchyChangeEvent.class);
- event.setOldChildren(oldComponents);
- event.setConnector(parentConnector);
- ccc.setChildComponents(newComponents);
- result.events.add(event);
- }
- } else if (!newComponents.isEmpty()) {
- getLogger().severe("Hierachy claims "
- + Util.getConnectorString(parentConnector)
- + " has component children even though it isn't a HasComponentsConnector");
- }
-
- Profiler.leave(
- "updateConnectorHierarchy handle HasComponentsConnector");
-
- Profiler.enter("updateConnectorHierarchy setChildren");
- parentConnector.setChildren(newChildren);
- Profiler.leave("updateConnectorHierarchy setChildren");
-
- Profiler.enter(
- "updateConnectorHierarchy find removed children");
-
- /*
- * Find children removed from this parent and mark for
- * removal unless they are already attached to some other
- * parent.
- */
- for (ServerConnector oldChild : oldChildren) {
- if (oldChild.getParent() != parentConnector) {
- // Ignore if moved to some other connector
- continue;
- }
-
- if (!newChildren.contains(oldChild)) {
- /*
- * Consider child detached for now, will be cleared
- * if it is later on added to some other parent.
- */
- maybeDetached.add(oldChild.getConnectorId());
- }
- }
-
- Profiler.leave(
- "updateConnectorHierarchy find removed children");
- } catch (final Throwable e) {
- getLogger().log(Level.SEVERE,
- "Error updating connector hierarchy", e);
- } finally {
- Profiler.leave("updateConnectorHierarchy hierarchy entry");
- }
- }
-
- private void recursivelyDetach(ServerConnector connector,
- JsArrayObject<ConnectorHierarchyChangeEvent> events,
- FastStringSet detachedConnectors) {
- detachedConnectors.add(connector.getConnectorId());
-
- /*
- * Reset state in an attempt to keep it consistent with the
- * hierarchy. No children and no parent is the initial situation
- * for the hierarchy, so changing the state to its initial value
- * is the closest we can get without data from the server.
- * #10151
- */
- String prefix = getClass().getSimpleName() + " ";
- Profiler.enter(prefix + "recursivelyDetach reset state");
- try {
- Profiler.enter(prefix
- + "recursivelyDetach reset state - getStateType");
- Type stateType = AbstractConnector.getStateType(connector);
- Profiler.leave(prefix
- + "recursivelyDetach reset state - getStateType");
-
- // Empty state instance to get default property values from
- Profiler.enter(prefix
- + "recursivelyDetach reset state - createInstance");
- Object defaultState = stateType.createInstance();
- Profiler.leave(prefix
- + "recursivelyDetach reset state - createInstance");
-
- if (connector instanceof AbstractConnector) {
- // optimization as the loop setting properties is very
- // slow
- replaceState((AbstractConnector) connector,
- defaultState);
- } else {
- SharedState state = connector.getState();
-
- Profiler.enter(prefix
- + "recursivelyDetach reset state - properties");
- JsArrayObject<Property> properties = stateType
- .getPropertiesAsArray();
- int size = properties.size();
- for (int i = 0; i < size; i++) {
- Property property = properties.get(i);
- property.setValue(state,
- property.getValue(defaultState));
- }
- Profiler.leave(prefix
- + "recursivelyDetach reset state - properties");
- }
- } catch (NoDataException e) {
- throw new RuntimeException("Can't reset state for "
- + Util.getConnectorString(connector), e);
- } finally {
- Profiler.leave(prefix + "recursivelyDetach reset state");
- }
-
- Profiler.enter(prefix + "recursivelyDetach perform detach");
- /*
- * Recursively detach children to make sure they get
- * setParent(null) and hierarchy change events as needed.
- */
- for (ServerConnector child : connector.getChildren()) {
- /*
- * Server doesn't send updated child data for removed
- * connectors -> ignore child that still seems to be a child
- * of this connector although it has been moved to some part
- * of the hierarchy that is not detached.
- */
- if (child.getParent() != connector) {
- continue;
- }
- recursivelyDetach(child, events, detachedConnectors);
- }
- Profiler.leave(prefix + "recursivelyDetach perform detach");
-
- /*
- * Clear child list and parent
- */
- Profiler.enter(
- prefix + "recursivelyDetach clear children and parent");
- connector
- .setChildren(Collections.<ServerConnector> emptyList());
- connector.setParent(null);
- Profiler.leave(
- prefix + "recursivelyDetach clear children and parent");
-
- /*
- * Create an artificial hierarchy event for containers to give
- * it a chance to clean up after its children if it has any
- */
- Profiler.enter(
- prefix + "recursivelyDetach create hierarchy event");
- if (connector instanceof HasComponentsConnector) {
- HasComponentsConnector ccc = (HasComponentsConnector) connector;
- List<ComponentConnector> oldChildren = ccc
- .getChildComponents();
- if (!oldChildren.isEmpty()) {
- /*
- * HasComponentsConnector has a separate child component
- * list that should also be cleared
- */
- ccc.setChildComponents(
- Collections.<ComponentConnector> emptyList());
-
- // Create event and add it to the list of pending events
- ConnectorHierarchyChangeEvent event = GWT
- .create(ConnectorHierarchyChangeEvent.class);
- event.setConnector(connector);
- event.setOldChildren(oldChildren);
- events.add(event);
- }
- }
- Profiler.leave(
- prefix + "recursivelyDetach create hierarchy event");
- }
-
- private native void replaceState(AbstractConnector connector,
- Object defaultState)
- /*-{
- connector.@com.vaadin.client.ui.AbstractConnector::state = defaultState;
- }-*/;
-
- private void handleRpcInvocations(ValueMap json) {
- if (json.containsKey("rpc")) {
- Profiler.enter("handleRpcInvocations");
-
- getLogger()
- .info(" * Performing server to client RPC calls");
-
- JsonArray rpcCalls = Util
- .jso2json(json.getJavaScriptObject("rpc"));
-
- int rpcLength = rpcCalls.length();
- for (int i = 0; i < rpcLength; i++) {
- try {
- JsonArray rpcCall = rpcCalls.getArray(i);
- MethodInvocation invocation = getRpcManager()
- .parseAndApplyInvocation(rpcCall,
- connection);
-
- if (onlyNoLayoutUpdates && !RpcManager
- .getMethod(invocation).isNoLayout()) {
- onlyNoLayoutUpdates = false;
- }
-
- } catch (final Throwable e) {
- getLogger().log(Level.SEVERE,
- "Error performing server to client RPC calls",
- e);
- }
- }
-
- Profiler.leave("handleRpcInvocations");
- }
- }
-
- };
- ApplicationConfiguration.runWhenDependenciesLoaded(c);
- }
-
- private void endRequestIfResponse(ValueMap json) {
- if (isResponse(json)) {
- // End the request if the received message was a
- // response, not sent asynchronously
- getMessageSender().endRequest();
- }
- }
-
- private boolean isResynchronize(ValueMap json) {
- return json.containsKey(ApplicationConstants.RESYNCHRONIZE_ID);
- }
-
- private boolean isResponse(ValueMap json) {
- ValueMap meta = json.getValueMap("meta");
- if (meta == null || !meta.containsKey("async")) {
- return true;
- }
- return false;
- }
-
- /**
- * Checks if the given serverId is the one we are currently waiting for from
- * the server
- */
- private boolean isNextExpectedMessage(int serverId) {
- if (serverId == -1) {
- return true;
- }
- if (serverId == getExpectedServerId()) {
- return true;
- }
- if (lastSeenServerSyncId == UNDEFINED_SYNC_ID) {
- // First message is always ok
- return true;
- }
- return false;
-
- }
-
- private int getServerId(ValueMap json) {
- if (json.containsKey(ApplicationConstants.SERVER_SYNC_ID)) {
- return json.getInt(ApplicationConstants.SERVER_SYNC_ID);
- } else {
- return -1;
- }
- }
-
- private int getExpectedServerId() {
- return lastSeenServerSyncId + 1;
- }
-
- /**
- * Timer used to make sure that no misbehaving components can delay response
- * handling forever.
- */
- Timer forceHandleMessage = new Timer() {
- @Override
- public void run() {
- if (!responseHandlingLocks.isEmpty()) {
- // Lock which was never release -> bug in locker or things just
- // too slow
- getLogger().warning(
- "WARNING: reponse handling was never resumed, forcibly removing locks...");
- responseHandlingLocks.clear();
- } else {
- // Waited for out-of-order message which never arrived
- // Do one final check and resynchronize if the message is not
- // there. The final check is only a precaution as this timer
- // should have been cancelled if the message has arrived
- getLogger().warning("Gave up waiting for message "
- + getExpectedServerId() + " from the server");
-
- }
- if (!handlePendingMessages() && !pendingUIDLMessages.isEmpty()) {
- // There are messages but the next id was not found, likely it
- // has been lost
- // Drop pending messages and resynchronize
- pendingUIDLMessages.clear();
- getMessageSender().resynchronize();
- }
- }
- };
-
- /**
- * This method can be used to postpone rendering of a response for a short
- * period of time (e.g. to avoid the rendering process during animation).
- *
- * @param lock
- */
- public void suspendReponseHandling(Object lock) {
- responseHandlingLocks.add(lock);
- }
-
- /**
- * Resumes the rendering process once all locks have been removed.
- *
- * @param lock
- */
- public void resumeResponseHandling(Object lock) {
- responseHandlingLocks.remove(lock);
- if (responseHandlingLocks.isEmpty()) {
- // Cancel timer that breaks the lock
- forceHandleMessage.cancel();
-
- if (!pendingUIDLMessages.isEmpty()) {
- getLogger().info(
- "No more response handling locks, handling pending requests.");
- handlePendingMessages();
- }
- }
- }
-
- private static native final int calculateBootstrapTime()
- /*-{
- if ($wnd.performance && $wnd.performance.timing) {
- return (new Date).getTime() - $wnd.performance.timing.responseStart;
- } else {
- // performance.timing not supported
- return -1;
- }
- }-*/;
-
- /**
- * Finds the next pending UIDL message and handles it (next pending is
- * decided based on the server id)
- *
- * @return true if a message was handled, false otherwise
- */
- private boolean handlePendingMessages() {
- if (pendingUIDLMessages.isEmpty()) {
- return false;
- }
-
- // Try to find the next expected message
- PendingUIDLMessage toHandle = null;
- for (PendingUIDLMessage message : pendingUIDLMessages) {
- if (isNextExpectedMessage(getServerId(message.json))) {
- toHandle = message;
- break;
- }
- }
-
- if (toHandle != null) {
- pendingUIDLMessages.remove(toHandle);
- handleJSON(toHandle.getJson());
- // Any remaining messages will be handled when this is called
- // again at the end of handleJSON
- return true;
- } else {
- return false;
- }
-
- }
-
- private void removeOldPendingMessages() {
- Iterator<PendingUIDLMessage> i = pendingUIDLMessages.iterator();
- while (i.hasNext()) {
- PendingUIDLMessage m = i.next();
- int serverId = getServerId(m.json);
- if (serverId != -1 && serverId < getExpectedServerId()) {
- getLogger().info("Removing old message with id " + serverId);
- i.remove();
- }
- }
- }
-
- /**
- * Gets the server id included in the last received response.
- * <p>
- * This id can be used by connectors to determine whether new data has been
- * received from the server to avoid doing the same calculations multiple
- * times.
- * <p>
- * No guarantees are made for the structure of the id other than that there
- * will be a new unique value every time a new response with data from the
- * server is received.
- * <p>
- * The initial id when no request has yet been processed is -1.
- *
- * @return an id identifying the response
- */
- public int getLastSeenServerSyncId() {
- return lastSeenServerSyncId;
- }
-
- /**
- * Gets the token (aka double submit cookie) that the server uses to protect
- * against Cross Site Request Forgery attacks.
- *
- * @return the CSRF token string
- */
- public String getCsrfToken() {
- return csrfToken;
- }
-
- /**
- * Checks whether state changes are currently being processed. Certain
- * operations are not allowed when the internal state of the application
- * might be in an inconsistent state because some state changes have been
- * applied but others not. This includes running layotus.
- *
- * @return <code>true</code> if the internal state might be inconsistent
- * because changes are being processed; <code>false</code> if the
- * state should be consistent
- */
- public boolean isUpdatingState() {
- return updatingState;
- }
-
- /**
- * Checks if the first UIDL has been handled
- *
- * @return true if the initial UIDL has already been processed, false
- * otherwise
- */
- public boolean isInitialUidlHandled() {
- return bootstrapTime != 0;
- }
-
- private LayoutManager getLayoutManager() {
- return LayoutManager.get(connection);
- }
-
- private ConnectorMap getConnectorMap() {
- return ConnectorMap.get(connection);
- }
-
- private UIConnector getUIConnector() {
- return connection.getUIConnector();
- }
-
- private RpcManager getRpcManager() {
- return connection.getRpcManager();
- }
-
- private MessageSender getMessageSender() {
- return connection.getMessageSender();
- }
-
- /**
- * Strips the JSON wrapping from the given json string with wrapping.
- *
- * If the given string is not wrapped as expected, returns null
- *
- * @since 7.6
- * @param jsonWithWrapping
- * the JSON received from the server
- * @return an unwrapped JSON string or null if the given string was not
- * wrapped
- */
- public static String stripJSONWrapping(String jsonWithWrapping) {
- if (jsonWithWrapping == null) {
- return null;
- }
-
- if (!jsonWithWrapping.startsWith(JSON_COMMUNICATION_PREFIX)
- || !jsonWithWrapping.endsWith(JSON_COMMUNICATION_SUFFIX)) {
- return null;
- }
- return jsonWithWrapping.substring(JSON_COMMUNICATION_PREFIX.length(),
- jsonWithWrapping.length() - JSON_COMMUNICATION_SUFFIX.length());
- }
-
- /**
- * Unwraps and parses the given JSON, originating from the server
- *
- * @param jsonText
- * the json from the server
- * @return A parsed ValueMap or null if the input could not be parsed (or
- * was null)
- */
- public static ValueMap parseJson(String jsonText) {
- if (jsonText == null) {
- return null;
- }
- final double start = Profiler.getRelativeTimeMillis();
- try {
- ValueMap json = parseJSONResponse(jsonText);
- getLogger().info("JSON parsing took "
- + Util.round(Profiler.getRelativeTimeMillis() - start, 3)
- + "ms");
- return json;
- } catch (final Exception e) {
- getLogger().severe("Unable to parse JSON: " + jsonText);
- return null;
- }
- }
-
- private static native ValueMap parseJSONResponse(String jsonText)
- /*-{
- try {
- return JSON.parse(jsonText);
- } catch (ignored) {
- return eval('(' + jsonText + ')');
- }
- }-*/;
-
- /**
- * Parse the given wrapped JSON, received from the server, to a ValueMap
- *
- * @param wrappedJsonText
- * the json, wrapped as done by the server
- * @return a ValueMap, or null if the wrapping was incorrect or json could
- * not be parsed
- */
- public static ValueMap parseWrappedJson(String wrappedJsonText) {
- return parseJson(stripJSONWrapping(wrappedJsonText));
- }
-
- private static final native double getFetchStartTime()
- /*-{
- if ($wnd.performance && $wnd.performance.timing && $wnd.performance.timing.fetchStart) {
- return $wnd.performance.timing.fetchStart;
- } else {
- return 0;
- }
- }-*/;
-
- }
|