Hi!, Im new kind of new on Vaadin and GWT, in fact I dont know much about GWT, I have problem with a simple application that Im doing on Vaadin, and the class Timer, Im just trying to reload a table every 5 minutes. I saw on some messages on the forums that Timer class from GWT can be used on vaadin but Im gettint this error:
Code:
private Timer t = new Timer() {
public void run() {
getWindow().showNotification(“Reload!”);
}
};
…
…
…
botonReload= new Button(“Reload”);
botonRecarga.addListener(new Button.ClickListener() {
@Override
public void buttonClick(ClickEvent event) {
// TODO Auto-generated method stub
// t.scheduleRepeating(5000);
// Schedule the timer to run once in 5 seconds.
t.schedule(5000);
}
});
Error:
com.vaadin.event.ListenerMethod$MethodException
Cause: java.lang.NoClassDefFoundError: com/google/gwt/user/client/Timer
at com.vaadin.event.ListenerMethod.receiveEvent(ListenerMethod.java:507)
at com.vaadin.event.EventRouter.fireEvent(EventRouter.java:161)
at com.vaadin.ui.AbstractComponent.fireEvent(AbstractComponent.java:1154)
at com.vaadin.ui.AbstractField.fireValueChange(AbstractField.java:895)
at com.vaadin.ui.AbstractField.setValue(AbstractField.java:535)
at com.vaadin.ui.AbstractSelect.setValue(AbstractSelect.java:665)
at com.vaadin.ui.AbstractSelect.changeVariables(AbstractSelect.java:474)
at com.vaadin.ui.Tree.changeVariables(Tree.java:446)
at com.vaadin.terminal.gwt.server.AbstractCommunicationManager.handleVariables(AbstractCommunicationManager.java:1094)
at com.vaadin.terminal.gwt.server.AbstractCommunicationManager.doHandleUidlRequest(AbstractCommunicationManager.java:590)
at com.vaadin.terminal.gwt.server.CommunicationManager.handleUidlRequest(CommunicationManager.java:266)
at com.vaadin.terminal.gwt.server.AbstractApplicationServlet.service(AbstractApplicationServlet.java:476)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:722)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:306)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:240)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:161)
at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:558)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:164)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:108)
at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:558)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:379)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:243)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:259)
at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:281)
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
Caused by: java.lang.NoClassDefFoundError: com/google/gwt/user/client/Timer
at com.icreativa.sbhebt.admin.app.SBHEBTApplication.valueChange(SBHEBTApplication.java:218)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at com.vaadin.event.ListenerMethod.receiveEvent(ListenerMethod.java:487)
… 28 more
Caused by: java.lang.ClassNotFoundException: com.google.gwt.user.client.Timer
at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1671)
at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1516)
… 34 more
I am using it wrong?, How do this work?