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package com.vaadin.tests.errorhandler;
import java.lang.reflect.InvocationTargetException;
import com.vaadin.event.ListenerMethod.MethodException;
import com.vaadin.server.DefaultErrorHandler;
import com.vaadin.server.ErrorHandler;
import com.vaadin.server.ServerRpcManager.RpcInvocationException;
import com.vaadin.server.VaadinRequest;
import com.vaadin.tests.components.AbstractReindeerTestUI;
import com.vaadin.ui.Button;
import com.vaadin.ui.Component;
import com.vaadin.ui.Label;
import com.vaadin.ui.Notification;
import com.vaadin.ui.Notification.Type;
import com.vaadin.ui.VerticalLayout;
public class ErrorHandlers extends AbstractReindeerTestUI {
public static class NotificationErrorHandler implements ErrorHandler {
@Override
public void error(com.vaadin.server.ErrorEvent event) {
Notification.show(getErrorMessage(event), Type.ERROR_MESSAGE);
}
}
@Override
protected void setup(VaadinRequest request) {
addComponent(runtimeExceptionOnClick(new Button("Standard button")));
addComponent(npeOnClick(new Button("Standard button with NPE")));
Button customErrorButton = notificationErrorHandler(
new Button("Button with notification error handler"));
addComponent(runtimeExceptionOnClick(customErrorButton));
final VerticalLayout layoutWithErrorHandler = new VerticalLayout(
runtimeExceptionOnClick(new Button("Error handler on parent")));
ErrorHandler e = event -> layoutWithErrorHandler.addComponent(
new Label("Layout error: " + getErrorMessage(event)));
layoutWithErrorHandler.setErrorHandler(e);
layoutWithErrorHandler.addComponent(notificationErrorHandler(
npeOnClick(new Button("Error handler on button and parent"))));
addComponent(layoutWithErrorHandler);
}
private Button notificationErrorHandler(Button button) {
button.setErrorHandler(new NotificationErrorHandler());
return button;
}
protected static String getErrorMessage(
com.vaadin.server.ErrorEvent event) {
Component c = DefaultErrorHandler.findAbstractComponent(event);
String errorMsg = "Error: '" + getMessage(event) + "' in ";
errorMsg += c.getClass().getSimpleName() + " with caption '"
+ c.getCaption() + "'";
return errorMsg;
}
private static String getMessage(com.vaadin.server.ErrorEvent event) {
Throwable e = getUserCodeException(event);
if (e.getMessage() != null) {
return e.getMessage();
} else {
return e.getClass().getSimpleName();
}
}
private static Throwable getUserCodeException(
com.vaadin.server.ErrorEvent event) {
Throwable t = event.getThrowable();
if (t instanceof RpcInvocationException) {
t = t.getCause();
}
if (t instanceof InvocationTargetException) {
t = t.getCause();
}
if (t instanceof MethodException) {
t = t.getCause();
}
return t;
}
private Button runtimeExceptionOnClick(Button customErrorButton) {
customErrorButton.setCaption("RE: " + customErrorButton.getCaption());
customErrorButton.addClickListener(event -> {
throw new RuntimeException("Fail in click event");
});
return customErrorButton;
}
private Button npeOnClick(Button customErrorButton) {
customErrorButton.setCaption("NPE: " + customErrorButton.getCaption());
customErrorButton.addClickListener(event -> {
Integer i = null;
i += 2;
});
return customErrorButton;
}
@Override
protected String getTestDescription() {
// TODO Auto-generated method stub
return null;
}
@Override
protected Integer getTicketNumber() {
// TODO Auto-generated method stub
return null;
}
}
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