import com.google.gwt.user.client.ui.HasWidgets;
import com.google.gwt.user.client.ui.Widget;
import com.vaadin.client.ApplicationConfiguration.ErrorMessage;
-import com.vaadin.client.ApplicationConnection.ApplicationStoppedEvent;
import com.vaadin.client.ResourceLoader.ResourceLoadEvent;
import com.vaadin.client.ResourceLoader.ResourceLoadListener;
import com.vaadin.client.communication.HasJavaScriptConnectorHelper;
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.AbstractComponentState;
import com.vaadin.shared.ApplicationConstants;
import com.vaadin.shared.JsonConstants;
import com.vaadin.shared.VaadinUriResolver;
* This is the client side communication "engine", managing client-server
* communication with its server side counterpart
* com.vaadin.server.VaadinService.
- *
+ *
* Client-side connectors receive updates from the corresponding server-side
* connector (typically component) as state updates or RPC calls. The connector
* has the possibility to communicate back with its server side counter part
* through RPC calls.
- *
+ *
* TODO document better
- *
+ *
* Entry point classes (widgetsets) define <code>onModuleLoad()</code>.
*/
public class ApplicationConnection implements HasHandlers {
* A string that, if found in a non-JSON response to a UIDL request, will
* cause the browser to refresh the page. If followed by a colon, optional
* whitespace, and a URI, causes the browser to synchronously load the URI.
- *
+ *
* <p>
* This allows, for instance, a servlet filter to redirect the application
* to a custom login page when the session expires. For example:
* </p>
- *
+ *
* <pre>
* if (sessionExpired) {
* response.setHeader("Content-Type", "text/html");
/**
* Event triggered when a XHR request has finished with the status code of
* the response.
- *
+ *
* Useful for handlers observing network failures like online/off-line
* monitors.
*/
/**
* Event triggered when a application is stopped by calling
* {@link ApplicationConnection#setApplicationRunning(false)}.
- *
+ *
* To listen for the event add a {@link ApplicationStoppedHandler} by
* invoking
* {@link ApplicationConnection#addHandler(ApplicationConnection.ApplicationStoppedEvent.Type, ApplicationStoppedHandler)}
* to the {@link ApplicationConnection}
- *
+ *
* @since 7.1.8
* @author Vaadin Ltd
*/
/**
* Called when a communication error has occurred. Returning
* <code>true</code> from this method suppresses error handling.
- *
+ *
* @param details
* A string describing the error.
* @param statusCode
* A listener for listening to application stopped events. The listener can
* be added to a {@link ApplicationConnection} by invoking
* {@link ApplicationConnection#addHandler(ApplicationStoppedEvent.Type, ApplicationStoppedHandler)}
- *
+ *
* @since 7.1.8
* @author Vaadin Ltd
*/
* Triggered when the {@link ApplicationConnection} marks a previously
* running application as stopped by invoking
* {@link ApplicationConnection#setApplicationRunning(false)}
- *
+ *
* @param event
* the event triggered by the {@link ApplicationConnection}
*/
* called once this application has started (first response received) or
* failed to start. This ensures that the applications are started in order,
* to avoid session-id problems.
- *
+ *
*/
public void start() {
String jsonText = configuration.getUIDL();
* <li><code>vaadin.postRequestHooks</code> is a map of functions which gets
* called after each XHR made by vaadin application. Note, that it is
* attaching js functions responsibility to create the variable like this:
- *
+ *
* <code><pre>
* if(!vaadin.postRequestHooks) {vaadin.postRequestHooks = new Object();}
* postRequestHooks.myHook = function(appId) {
* </pre></code> First parameter passed to these functions is the identifier
* of Vaadin application that made the request.
* </ul>
- *
+ *
* TODO make this multi-app aware
*/
private native void initializeClientHooks()
/**
* Runs possibly registered client side post request hooks. This is expected
* to be run after each uidl request made by Vaadin application.
- *
+ *
* @param appId
*/
private static native void runPostRequestHooks(String appId)
/**
* If on Liferay and logged in, ask the client side session management
* JavaScript to extend the session duration.
- *
+ *
* Otherwise, Liferay client side JavaScript will explicitly expire the
* session even though the server side considers the session to be active.
* See ticket #8305 for more information.
/**
* Indicates whether or not there are currently active UIDL requests. Used
* internally to sequence requests properly, seldom needed in Widgets.
- *
+ *
* @return true if there are active requests
*/
public boolean hasActiveRequest() {
/**
* Requests an analyze of layouts, to find inconsistencies. Exclusively used
* for debugging during development.
- *
+ *
* @deprecated as of 7.1. Replaced by {@link UIConnector#analyzeLayouts()}
*/
@Deprecated
* Sends a request to the server to print details to console that will help
* the developer to locate the corresponding server-side connector in the
* source code.
- *
+ *
* @param serverConnector
* @deprecated as of 7.1. Replaced by
* {@link UIConnector#showServerDebugInfo(ServerConnector)}
/**
* Makes an UIDL request to the server.
- *
+ *
* @param reqInvocations
* Data containing RPC invocations and all related information.
* @param extraParams
/**
* Sends an asynchronous or synchronous UIDL request to the server using the
* given URI.
- *
+ *
* @param uri
* The URI to use for the request. May includes GET parameters
* @param payload
}
}).schedule(100);
} else {
- handleError(
- "Invalid status code 0 (server down?)",
+ handleError("Invalid status code 0 (server down?)",
statusCode);
}
return;
} else if ((statusCode / 100) == 5) {
// Something's wrong on the server, there's nothing the
// client can do except maybe try again.
- handleError("Server error. Error code: "
- + statusCode, statusCode);
+ handleError("Server error. Error code: " + statusCode,
+ statusCode);
return;
}
/**
* Handles received UIDL JSON text, parsing it, and passing it on to the
* appropriate handlers, while logging timing information.
- *
+ *
* @param jsonText
* @param statusCode
*/
/**
* Sends an asynchronous UIDL request to the server using the given URI.
- *
+ *
* @param uri
* The URI to use for the request. May includes GET parameters
* @param payload
/**
* Checks whether or not the CSS is loaded. By default checks the size of
* the loading indicator element.
- *
+ *
* @return
*/
protected boolean isCSSLoaded() {
/**
* Shows the communication error notification.
- *
+ *
* @param details
* Optional details for debugging.
* @param statusCode
* The status code returned for the request
- *
+ *
*/
protected void showCommunicationError(String details, int statusCode) {
VConsole.error("Communication error: " + details);
/**
* Shows the authentication error notification.
- *
+ *
* @param details
* Optional details for debugging.
*/
/**
* Shows the session expiration notification.
- *
+ *
* @param details
* Optional details for debugging.
*/
/**
* Shows an error notification.
- *
+ *
* @param details
* Optional details for debugging.
* @param message
/**
* Shows the error notification.
- *
+ *
* @param details
* Optional details for debugging.
*/
/**
* This method is called after applying uidl change set to application.
- *
+ *
* It will clean current and queued variable change sets. And send next
* change set if it exists.
*/
/**
* Cleans given queue of variable changes of such changes that came from
* components that do not exist anymore.
- *
+ *
* @param variableBurst
*/
private void cleanVariableBurst(
int size = connectors.size();
for (int i = 0; i < size; i++) {
ServerConnector conn = connectors.get(i);
- ComponentConnector compConn = null;
+ if (isWorkPending(conn)) {
+ return true;
+ }
+
if (conn instanceof ComponentConnector) {
- compConn = (ComponentConnector) conn;
- Widget wgt = compConn.getWidget();
- if (wgt instanceof DeferredWorker) {
- if (((DeferredWorker) wgt).isWorkPending()) {
- return true;
- }
+ ComponentConnector compConn = (ComponentConnector) conn;
+ if (isWorkPending(compConn.getWidget())) {
+ return true;
}
}
}
return false;
}
+ private static boolean isWorkPending(Object object) {
+ return object instanceof DeferredWorker
+ && ((DeferredWorker) object).isWorkPending();
+ }
+
/**
* Checks if deferred commands are (potentially) still being executed as a
* result of an update from the server. Returns true if a deferred command
* <p>
* Used by the native "client.isActive" function.
* </p>
- *
+ *
* @return true if deferred commands are (potentially) being executed, false
* otherwise
*/
/**
* Returns the loading indicator used by this ApplicationConnection
- *
+ *
* @return The loading indicator for this ApplicationConnection
*/
public VLoadingIndicator getLoadingIndicator() {
/**
* Determines whether or not the loading indicator is showing.
- *
+ *
* @return true if the loading indicator is visible
* @deprecated As of 7.1. Use {@link #getLoadingIndicator()} and
* {@link VLoadingIndicator#isVisible()}.isVisible() instead.
* server is received.
* <p>
* The initial id when no request has yet been processed is -1.
- *
+ *
* @return and id identifying the response
*/
public int getLastResponseId() {
/**
* 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
*/
* 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
/**
* Adds an explicit RPC method invocation to the send queue.
- *
+ *
* @since 7.0
- *
+ *
* @param invocation
* RPC method invocation
* @param delayed
/**
* Removes any pending invocation of the given method from the queue
- *
+ *
* @param invocation
* The invocation to remove
*/
/**
* This method sends currently queued variable changes to server. It is
* called when immediate variable update must happen.
- *
+ *
* To ensure correct order for variable changes (due servers multithreading
* or network), we always wait for active request to be handler before
* sending a new one. If there is an active request, we will put varible
* "burst" to queue that will be purged after current request is handled.
- *
+ *
*/
public void sendPendingVariableChanges() {
if (!deferredSendPending) {
/**
* Build the variable burst and send it to server.
- *
+ *
* When sync is forced, we also force sending of all pending variable-bursts
* at the same time. This is ok as we can assume that DOM will never be
* updated after this.
- *
+ *
* @param pendingInvocations
* List of RPC method invocations to send
*/
* is true, the update is sent as soon as possible. If immediate is false,
* the update will be sent along with the next immediate update.
* </p>
- *
+ *
* @param paintableId
* the id of the paintable that owns the variable
* @param variableName
* is true, the update is sent as soon as possible. If immediate is false,
* the update will be sent along with the next immediate update.
* </p>
- *
+ *
* @param paintableId
* the id of the paintable that owns the variable
* @param variableName
* is true, the update is sent as soon as possible. If immediate is false,
* the update will be sent along with the next immediate update.
* </p>
- *
+ *
* @param paintableId
* the id of the paintable that owns the variable
* @param variableName
* is true, the update is sent as soon as possible. If immediate is false,
* the update will be sent along with the next immediate update.
* </p>
- *
+ *
* @param paintableId
* the id of the paintable that owns the variable
* @param variableName
* is true, the update is sent as soon as possible. If immediate is false,
* the update will be sent along with the next immediate update.
* </p>
- *
+ *
* @param paintableId
* the id of the paintable that owns the variable
* @param variableName
* is true, the update is sent as soon as possible. If immediate is false,
* the update will be sent along with the next immediate update.
* </p>
- *
+ *
* @param paintableId
* the id of the paintable that owns the variable
* @param variableName
* is true, the update is sent as soon as possible. If immediate is false,
* the update will be sent along with the next immediate update.
* </p>
- *
+ *
* @param paintableId
* the id of the paintable that owns the variable
* @param variableName
* is true, the update is sent as soon as possible. If immediate is false,
* the update will be sent along with the next immediate update.
* </p>
- *
+ *
* @param paintableId
* the id of the paintable that owns the variable
* @param variableName
/**
* Sends a new value for the given paintables given variable to the server.
- *
+ * <p>
* The update is actually queued to be sent at a suitable time. If immediate
* is true, the update is sent as soon as possible. If immediate is false,
* the update will be sent along with the next immediate update.
- *
+ * <p>
* A null array is sent as an empty array.
- *
+ *
* @param paintableId
* the id of the paintable that owns the variable
* @param variableName
/**
* Sends a new value for the given paintables given variable to the server.
- *
+ * <p>
* The update is actually queued to be sent at a suitable time. If immediate
* is true, the update is sent as soon as possible. If immediate is false,
- * the update will be sent along with the next immediate update. </p>
- *
+ * the update will be sent along with the next immediate update.
+ * <p>
* A null array is sent as an empty array.
- *
- *
+ *
* @param paintableId
* the id of the paintable that owns the variable
* @param variableName
/**
* Does absolutely nothing. Replaced by {@link LayoutManager}.
- *
+ *
* @param container
* @deprecated As of 7.0, serves no purpose
*/
/**
* Returns false
- *
+ *
* @param paintable
* @return false, always
* @deprecated As of 7.0, serves no purpose
/**
* Returns false
- *
+ *
* @param paintable
* @return false, always
* @deprecated As of 7.0, serves no purpose
/**
* Get either an existing ComponentConnector or create a new
* ComponentConnector with the given type and id.
- *
+ *
* If a ComponentConnector with the given id already exists, returns it.
* Otherwise creates and registers a new ComponentConnector of the given
* type.
- *
+ *
* @param connectorId
* Id of the paintable
* @param connectorType
* Type of the connector, as passed from the server side
- *
+ *
* @return Either an existing ComponentConnector or a new ComponentConnector
* of the given type
*/
/**
* Creates a new ServerConnector with the given type and id.
- *
+ *
* Creates and registers a new ServerConnector of the given type. Should
* never be called with the connector id of an existing connector.
- *
+ *
* @param connectorId
* Id of the new connector
* @param connectorType
* Type of the connector, as passed from the server side
- *
+ *
* @return A new ServerConnector of the given type
*/
private ServerConnector createAndRegisterConnector(String connectorId,
/**
* Gets a recource that has been pre-loaded via UIDL, such as custom
* layouts.
- *
+ *
* @param name
* identifier of the resource to get
* @return the resource
/**
* Singleton method to get instance of app's context menu.
- *
+ *
* @return VContextMenu object
*/
public VContextMenu getContextMenu() {
/**
* Gets an {@link Icon} instance corresponding to a URI.
- *
+ *
* @since 7.2
* @param uri
* @return Icon object
* Translates custom protocols in UIDL URI's to be recognizable by browser.
* All uri's from UIDL should be routed via this method before giving them
* to browser due URI's in UIDL may contain custom protocols like theme://.
- *
+ *
* @param uidlUri
* Vaadin URI from uidl
* @return translated URI ready for browser
/**
* Gets the URI for the current theme. Can be used to reference theme
* resources.
- *
+ *
* @return URI to the current theme
*/
public String getThemeUri() {
/**
* Listens for Notification hide event, and redirects. Used for system
* messages, such as session expired.
- *
+ *
*/
private class NotificationRedirect implements VNotification.EventListener {
String url;
/**
* 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() {
/**
* Use to notify that the given component's caption has changed; layouts may
* have to be recalculated.
- *
+ *
* @param component
* the Paintable whose caption has changed
* @deprecated As of 7.0.2, has not had any effect for a long time
/**
* Gets the main view
- *
+ *
* @return the main view
*/
public UIConnector getUIConnector() {
/**
* Gets the {@link ApplicationConfiguration} for the current application.
- *
+ *
* @see ApplicationConfiguration
* @return the configuration for this application
*/
* list of events which has server side listeners is updated automatically
* before the component is updated so the value is correct if called from
* updatedFromUIDL.
- *
+ *
* @param paintable
* The connector to register event listeners for
* @param eventIdentifier
/**
* Adds the get parameters to the uri and returns the new uri that contains
* the parameters.
- *
+ *
* @param uri
* The uri to which the parameters should be added.
* @param extraParams
/**
* Get VTooltip instance related to application connection
- *
+ *
* @return VTooltip instance
*/
public VTooltip getVTooltip() {
* this method is now handled by the state change event handler in
* AbstractComponentConnector. The only function this method has is to
* return true if the UIDL is a "cached" update.
- *
+ *
* @param component
* @param uidl
* @param manageCaption
* Schedules a heartbeat request to occur after the configured heartbeat
* interval elapses if the interval is a positive number. Otherwise, does
* nothing.
- *
+ *
* @deprecated as of 7.2, use {@link Heartbeat#schedule()} instead
*/
@Deprecated
* Heartbeat requests are used to inform the server that the client-side is
* still alive. If the client page is closed or the connection lost, the
* server will eventually close the inactive UI.
- *
+ *
* @deprecated as of 7.2, use {@link Heartbeat#send()} instead
*/
@Deprecated
/**
* 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) {
/**
* Resumes the rendering process once all locks have been removed.
- *
+ *
* @param lock
*/
public void resumeResponseHandling(Object lock) {
/**
* Sets the delegate that is called whenever a communication error occurrs.
- *
+ *
* @param delegate
* the delegate.
*/
/**
* Gets the active connector for focused element in browser.
- *
+ *
* @return Connector for focused element or null.
*/
private ComponentConnector getActiveConnector() {
/**
* Sets the status for the push connection.
- *
+ *
* @param enabled
* <code>true</code> to enable the push connection;
* <code>false</code> to disable the push connection.
push.init(this, pushState, new CommunicationErrorHandler() {
@Override
public boolean onError(String details, int statusCode) {
- handleCommunicationError(details,statusCode);
+ handleCommunicationError(details, statusCode);
return true;
}
});
/**
* Returns a human readable string representation of the method used to
* communicate with the server.
- *
+ *
* @since 7.1
* @return A string representation of the current transport type
*/
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