An example of logging in with Errai Security via the AuthenticationService Caller

LoginForm.java

@Templated
@Page(role = LoginPage.class)
public class LoginForm extends Composite {
  
  @Inject @DataField
  private TextBox username;
  
  @Inject @DataField
  private TextBox password;
  
  @Inject @DataField
  private Button submit;
  
  @Inject
  private Caller<AuthenticationService> authenticationCaller;
  
  @EventHandler("submit")
  public void submit(ClickEvent event) {
    authenticationCaller.call(new RemoteCallback<User>() {
      
      public void callback(User user) {
        Window.alert("Login Successful!");
      }
    }, new ErrorCallback<Message>() {
      
      public boolean error(Message message, Throwable t) {
        Window.alert("Login Failed!");
      }
    }).login(username.getText(), password.getText());
  }
}