Hello
I have the following case, I have a button with a Download that download a file from a server.
In the class constructor I have:
StreamResource sr = getExcelStream ();
FileDownloader fileDownloader = new FileDownloader (sr);
fileDownloader.extend (btExcel);
getExcelStream () is:
private StreamResource getExcelStream () {
StreamResource.StreamSource source = new StreamResource.StreamSource () {
private static final long serialVersionUID = -1413114720868341991L;
public InputStream getStream () {
Notification notif = null;
try {
ByteArrayOutputStream stream = new ByteArrayOutputStream ();
String content = loadTable (true);
if (content.isEmpty ()) {
notif = null;
UI.getCurrent (). MarkAsDirtyRecursive ();
notif = new Notification (translator.getTranslation ("cosmsexportKO"), Type.ERROR_MESSAGE);
notif.setDelayMsec (2000);
notif.show (UI.getCurrent (). getPage ());
UI.getCurrent (). MarkAsDirtyRecursive ();
return null;
}
stream.write (Base64.decodeBase64 (content));
InputStream input = new ByteArrayInputStream (stream.toByteArray ());
return input;
} catch (Exception e) {
notif = null;
UI.getCurrent (). MarkAsDirtyRecursive ();
notif = new Notification (translator.getTranslation ("cosmsexportKO"), Type.ERROR_MESSAGE);
notif.setDelayMsec (2000);
notif.show (UI.getCurrent (). getPage ());
UI.getCurrent (). MarkAsDirtyRecursive ();
return null;
}
}
};
StreamResource resource = new StreamResource (source, "listacontratos.xls");
return resource;
}
The code may be better, but it is not the case …
The problem is the following, I want it when I call the method: loadTable (true); is displayed a Notification that says that the file is being downloaded (raductor.getTranslation (“cosmsexportKO”), but the problem is that until it leaves the method getExcelStream () does not do it.
For more I have tried to put the code to display the message in the Button.ClickListener … put the markAsDirty … I have not managed to do it … Does anyone have any ideas?
Sorry for my poor english
Eduardo.
I put markAsDirty because only display de notification after exit the method…