vaadin-framework/uitest/src/main/java/com/vaadin/tests/appengine/GAESyncTest.java

package com.vaadin.tests.appengine;

import com.google.apphosting.api.DeadlineExceededException;
import com.vaadin.data.Property;
import com.vaadin.data.Property.ValueChangeEvent;
import com.vaadin.server.ClassResource;
import com.vaadin.server.DownloadStream;
import com.vaadin.server.LegacyApplication;
import com.vaadin.ui.Button;
import com.vaadin.ui.Button.ClickEvent;
import com.vaadin.ui.Embedded;
import com.vaadin.ui.GridLayout;
import com.vaadin.ui.Label;
import com.vaadin.ui.LegacyWindow;
import com.vaadin.ui.Notification;
import com.vaadin.v7.ui.LegacyTextField;

public class GAESyncTest extends LegacyApplication {

    /**
     *
     */
    private static final long serialVersionUID = -3724319151122707926l;

    @Override
    public void init() {
        setMainWindow(new IntrWindow(this));

    }

    @Override
    public void error(com.vaadin.server.ErrorEvent event) {
        Throwable t = event.getThrowable();
        // Was this caused by a GAE timeout?
        while (t != null) {
            if (t instanceof DeadlineExceededException) {
                getMainWindow().showNotification("Bugger!", "Deadline Exceeded",
                        Notification.TYPE_ERROR_MESSAGE);
                return;
            }
            t = t.getCause();
        }

        super.error(event);

    }

    private class IntrWindow extends LegacyWindow {
        private int n = 0;
        private static final long serialVersionUID = -6521351715072191625l;
        LegacyTextField tf;
        Label l;
        LegacyApplication app;
        GridLayout gl;

        private IntrWindow(LegacyApplication app) {

            this.app = app;
            tf = new LegacyTextField("Echo thingie");
            tf.setImmediate(true);
            tf.addListener(new Property.ValueChangeListener() {
                @Override
                public void valueChange(ValueChangeEvent event) {
                    IntrWindow.this.showNotification(
                            (String) event.getProperty().getValue());

                }

            });
            addComponent(tf);

            l = new Label("" + n);
            addComponent(l);

            {
                Button b = new Button("Slow", new Button.ClickListener() {
                    @Override
                    public void buttonClick(ClickEvent event) {
                        try {
                            Thread.sleep(15000);
                        } catch (InterruptedException e) {
                            // TODO Auto-generated catch block
                            e.printStackTrace();
                        }
                    }

                });
                addComponent(b);
            }

            {
                Button b = new Button("Add", new Button.ClickListener() {

                    @Override
                    public void buttonClick(ClickEvent event) {
                        if (getUI() == getMainWindow()) {
                            getUI().getPage()
                                    .showNotification(new Notification("main"));
                            try {
                                Thread.sleep((5000));
                            } catch (InterruptedException e) {
                                // TODO Auto-generated catch block
                                e.printStackTrace();
                            }
                        }
                        addImage();
                    }

                });
                addComponent(b);
            }

            gl = new GridLayout(30, 50);
            addComponent(gl);

        }

        private void addImage() {
            ClassResource res = new ClassResource("img1.png") {

                private static final long serialVersionUID = 1L;

                @Override
                public DownloadStream getStream() {
                    try {
                        Thread.sleep((long) (Math.random() * 5000));
                    } catch (InterruptedException e) {
                        // TODO Auto-generated catch block
                        e.printStackTrace();
                    }
                    return super.getStream();
                }

            };
            res.setCacheTime(0);
            Embedded emb = new Embedded("" + n, res);
            emb.setWidth("30px");
            emb.setHeight("5px");
            gl.addComponent(emb);
            l.setValue("" + n++);
        }

    }

    @Override
    public LegacyWindow getWindow(String name) {
        LegacyWindow w = super.getWindow(name);
        if (w == null) {
            w = new IntrWindow(this);
            addWindow(w);
        }
        return w;

    }

}