Example usage for com.vaadin.server DefaultErrorHandler doDefault

Introduction

In this page you can find the example usage for com.vaadin.server DefaultErrorHandler doDefault.

Prototype

public static void doDefault(ErrorEvent event) 

Source Link

Usage

From source file:com.klwork.explorer.web.MyNavigationUI.java

License:Apache License

/**
 * Exception on action//w  w w. jav a2 s .  c  o m
 */
@Override
public void error(com.vaadin.server.ErrorEvent event) {
    // connector event
    if (event.getThrowable().getCause() instanceof IllegalArgumentException) {
        IllegalArgumentException exception = (IllegalArgumentException) event.getThrowable().getCause();
        Notification.show(exception.getMessage(), Notification.Type.ERROR_MESSAGE);

        // Cleanup view. Now Vaadin ignores errors and always shows the view.  :-(
        // since beta10
        setContent(null);
        return;
    }

    // Error on page load. Now it doesn't work. User sees standard error page.
    if (event.getThrowable() instanceof IllegalArgumentException) {
        IllegalArgumentException exception = (IllegalArgumentException) event.getThrowable();

        Label label = new Label(exception.getMessage());
        label.setWidth(-1, Unit.PERCENTAGE);

        Link goToMain = new Link("Go to main", new ExternalResource("/"));

        VerticalLayout layout = new VerticalLayout();
        layout.addComponent(label);
        layout.addComponent(goToMain);
        layout.setComponentAlignment(label, Alignment.MIDDLE_CENTER);
        layout.setComponentAlignment(goToMain, Alignment.MIDDLE_CENTER);

        VerticalLayout mainLayout = new VerticalLayout();
        mainLayout.setSizeFull();
        mainLayout.addComponent(layout);
        mainLayout.setComponentAlignment(layout, Alignment.MIDDLE_CENTER);

        setContent(mainLayout);
        Notification.show(exception.getMessage(), Notification.Type.ERROR_MESSAGE);
        return;
    }

    DefaultErrorHandler.doDefault(event);
}

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