com.vaadin.server

Class GlobalResourceHandler

java.lang.Object

com.vaadin.server.GlobalResourceHandler

All Implemented Interfaces:

RequestHandler, Serializable

public class GlobalResourceHandler
extends Object
implements RequestHandler

A RequestHandler that takes care of ConnectorResources that should not be served by the connector.

Since:

7.0.0

Author:

Vaadin Ltd

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
GlobalResourceHandler()

Method Summary

Modifier and Type	Method and Description
String	getUri(ClientConnector connector, ConnectorResource resource) Gets a global URI for a resource if it's registered with this handler.
boolean	handleRequest(VaadinSession session, VaadinRequest request, VaadinResponse response) Called when a request needs to be handled.
void	register(Resource resource, ClientConnector ownerConnector) Registers a resource to be served with a global URL.
void	unregisterConnector(ClientConnector connector) Notifies this handler that resources registered for the given connector can be released.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

GlobalResourceHandler

public GlobalResourceHandler()

Method Detail

handleRequest

public boolean handleRequest(VaadinSession session,
                             VaadinRequest request,
                             VaadinResponse response)
                      throws IOException

Description copied from interface: RequestHandler

Called when a request needs to be handled. If a response is written, this method should return true to indicate that no more request handlers should be invoked for the request.

Note that request handlers by default do not lock the session. If you are using VaadinSession or anything inside the VaadinSession you must ensure the session is locked. This can be done by extending SynchronizedRequestHandler or by using VaadinSession.accessSynchronously(Runnable) or UI.accessSynchronously(Runnable).

Specified by:

handleRequest in interface RequestHandler

Parameters:

session - The session for the request

request - The request to handle

response - The response object to which a response can be written.

Returns:

true if a response has been written and no further request handlers should be called, otherwise false

Throws:

IOException - If an IO error occurred

register

public void register(Resource resource,
                     ClientConnector ownerConnector)

Registers a resource to be served with a global URL.

A ConnectorResource registered for a LegacyComponent will be set to be served with a global URL. Other resource types will be ignored and thus not served by this handler.

Parameters:

resource - the resource to register

ownerConnector - the connector to which the resource belongs

getUri

public String getUri(ClientConnector connector,
                     ConnectorResource resource)

Gets a global URI for a resource if it's registered with this handler.

Parameters:

connector - the connector for which the uri should be generated.

resource - the resource for which the uri should be generated.

Returns:

an URI string, or null if the resource is not registered.

unregisterConnector

public void unregisterConnector(ClientConnector connector)

Notifies this handler that resources registered for the given connector can be released.

Parameters:

connector - the connector for which any registered resources can be released.