package com.vaadin.tests.push;
import com.vaadin.annotations.Push;
import com.vaadin.server.SessionDestroyEvent;
import com.vaadin.server.SessionDestroyListener;
import com.vaadin.server.VaadinRequest;
import com.vaadin.server.WrappedSession;
import com.vaadin.shared.ui.ui.Transport;
import com.vaadin.tests.components.AbstractTestUIWithLog;
import com.vaadin.ui.Button;
import com.vaadin.ui.Button.ClickEvent;
import com.vaadin.ui.Button.ClickListener;
import com.vaadin.ui.Label;
@Push(transport = Transport.WEBSOCKET)
public class PushWebsocketDeadlockUI extends AbstractTestUIWithLog {
// Test for https://dev.vaadin.com/ticket/18436
// Needs breakpoints to test, see ticket for more information
// Can reproduce on Tomcat 8, can't seem to reproduce using
// DevelopmentServerLauncher
// Rough steps to reproduce
// 1. Open test in a new Chrome window
// 2. Set breakpoint in PushHandler.connectionLost
// 3. Set breakpoint in UI.close
// 4. Set breakpoint in PushRequestHandler.handleRequest
// 5. Click the "schedule UI close" button
// 6. Close the Chrome window before the 5s timeout expires and ensure it
// really closes
// 7. Wait for three threads to hit their breakpoints
// 8. Continue/step forward in proper order (see ticket)
@Override
protected void setup(VaadinRequest request) {
WrappedSession wrappedSession = getSession().getSession();
request.getService()
.addSessionDestroyListener(new SessionDestroyListener() {
@Override
public void sessionDestroy(SessionDestroyEvent e) {
System.out.println(
"Session " + e.getSession() + " destroyed");
}
});
final Label l = new Label("Session timeout is "
+ wrappedSession.getMaxInactiveInterval() + "s");
addComponents(l);
Button button = new Button("Invalidate session");
button.addClickListener(new ClickListener() {
@Override
public void buttonClick(ClickEvent e) {
System.out.println(
"invalidating " + getSession() + " for http session "
+ getSession().getSession().getId());
getSession().getSession().invalidate();
System.out.println("invalidated " + getSession());
}
});
addComponents(button);
button = new Button("Close UI");
button.addClickListener(new ClickListener() {
@Override
public void buttonClick(ClickEvent e) {
System.out.println("closing UI " + getUIId() + " in session "
+ getSession() + " for http session "
+ getSession().getSession().getId());
close();
}
});
addComponents(button);
button = new Button("Schedule Close UI (5s delay)");
button.addClickListener(new ClickListener() {
@Override
public void buttonClick(ClickEvent e) {
new Thread(new Runnable() {
@Override
public void run() {
try {
Thread.sleep(5000);
} catch (InterruptedException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
}
// Breakpoint here
access(new Runnable() {
@Override
public void run() {
close();
System.out.println("closing UI " + getUIId()
+ " in session " + getSession()
+ " for http session "
+ getSession().getSession().getId());
}
});
}
}).start();
}
});
addComponents(button);
button = new Button("Slow (5s) operation");
button.addClickListener(new ClickListener() {
@Override
public void buttonClick(ClickEvent e) {
try {
Thread.sleep(5000);
} catch (InterruptedException e1) {
e1.printStackTrace();
}
addComponent(new Label("Slow operation done"));
}
});
addComponents(button);
}
}