Class StreamRequestHandler

Field Detail

• DYN_RES_PREFIX

  public static final String DYN_RES_PREFIX

  Dynamic resource URI prefix.

  See Also:

  Constant Field Values

Constructor Detail

• StreamRequestHandler

  public StreamRequestHandler()

  Create a new stream request handler with the default StreamReceiverHandler.

• StreamRequestHandler

  protected StreamRequestHandler​(StreamReceiverHandler receiverHandler)

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(Command) or UI.accessSynchronously(Command).

  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

• generateURI

  public static String generateURI​(String name,
                                   String id)

  Generates URI string for a dynamic resource using its id and name. [0] UIid, [1] sec key, [2] name

  Parameters:

  name - file or attribute name to use in path

  id - unique resource id

  Returns:

  generated URI string