/* ServerPushWindow.java
{{IS_NOTE
Purpose:
Description:
History:
Mon Aug 6 12:37:13 2007, Created by tomyeh
}}IS_NOTE
Copyright (C) 2007 Potix Corporation. All Rights Reserved.
*/
package org.zkoss.zktest.test2;
import org.zkoss.lang.Threads;
import org.zkoss.util.logging.Log;
import org.zkoss.zk.ui.Executions;
import org.zkoss.zk.ui.Desktop;
import org.zkoss.zk.ui.Component;
import org.zkoss.zk.ui.sys.DesktopCtrl;
import org.zkoss.zul.*;
/**
* Used to test the server-push feature.
*
* @author tomyeh
*/
public class ServerPush {
private static final Log log = Log.lookup(ServerPush.class);
public static void start(Component info, Textbox tb) throws InterruptedException {
start(null, info, tb);
}
public static void start(org.zkoss.zk.ui.sys.ServerPush sp, Component info, Textbox tb) throws InterruptedException {
final Desktop desktop = Executions.getCurrent().getDesktop();
if (desktop.isServerPushEnabled()) {
Messagebox.show("Already started");
} else {
desktop.removeAttribute("sp.ceased");
if (sp != null)
((DesktopCtrl)desktop).enableServerPush(sp);
else
desktop.enableServerPush(true);
new WorkingThread(info, tb).start();
}
}
public static void stop() throws InterruptedException {
final Desktop desktop = Executions.getCurrent().getDesktop();
if (desktop.isServerPushEnabled()) {
desktop.enableServerPush(false);
desktop.setAttribute("sp.ceased", Boolean.TRUE);
} else {
Messagebox.show("Already stopped");
}
}
public static void updateInfo(Component info, Textbox tb, String postfix) {
Integer i = (Integer)info.getAttribute("count");
int v = i == null ? 0: i.intValue() + 1;
if (info.getChildren().size() >= 10) {
((Component)info.getChildren().get(0)).detach();
((Component)info.getChildren().get(0)).detach();
}
info.setAttribute("count", new Integer(v));
info.appendChild(new Label(" " + v + ", " + tb.getValue() + " " + postfix));
info.appendChild(new Separator());
//create a new component that is easier to detect bugs
}
private static class WorkingThread extends Thread {
private final Desktop _desktop;
private final Component _info;
private final Textbox _tb;
private WorkingThread(Component info, Textbox tb) {
_desktop = info.getDesktop();
_info = info;
_tb = tb;
}
public void run() {
try {
while (_desktop.getAttribute("sp.ceased") == null) {
Executions.activate(_desktop);
try {
updateInfo(_info, _tb, "comet");
} catch (RuntimeException ex) {
log.error(ex);
throw ex;
} catch (Error ex) {
log.error(ex);
throw ex;
} finally {
Executions.deactivate(_desktop);
}
Threads.sleep(2000); //Update every two seconds
}
log.info("The server push thread ceased");
} catch (InterruptedException ex) {
log.info("The server push thread interrupted", ex);
}
}
}
}