import java.util.Collections;
import java.util.HashSet;
import java.util.Set;
import com.webobjects.appserver.WOActionResults;
import com.webobjects.appserver.WOApplication;
import com.webobjects.appserver.WOComponent;
import com.webobjects.appserver.WOContext;
import com.webobjects.appserver.WOResponse;
import er.ajax.AjaxPushRequestHandler;
import er.ajax.AjaxUtils;
import er.extensions.appserver.ERXResponse;
public class PushExample extends WOComponent {
public PushExample(WOContext context) {
super(context);
if (!_pushThread.isAlive()) {
_pushThread.start();
}
}
public String url() {
return context().urlWithRequestHandlerKey(AjaxPushRequestHandler.AjaxCometRequestHandlerKey, "test",
WOApplication.application().sessionIdKey() + "=" + session().sessionID());
}
@Override
public void appendToResponse(WOResponse response, WOContext context) {
super.appendToResponse(response, context);
AjaxUtils.addScriptResourceInHead(context, response, "prototype.js");
AjaxUtils.addScriptResourceInHead(context, response, "wonder.js");
}
private static Set<String> _pushSessionIDs = Collections.synchronizedSet(new HashSet<String>());
private static Thread _pushThread = new Thread(new Runnable() {
public void run() {
boolean running = true;
while (running) {
Set<String> pushSessionIDs = new HashSet<String>(_pushSessionIDs);
for (String pushSessionID : pushSessionIDs) {
if (AjaxPushRequestHandler.isResponseOpen(pushSessionID, "test")) {
String str = "<br>push to '" + pushSessionID+ "': " + System.currentTimeMillis();
System.out.println("ERXKeepAliveResponse.push: sending '" + str + "'");
AjaxPushRequestHandler.push(pushSessionID, "test", str);
try {
Thread.sleep(2000);
}
catch (InterruptedException e) {
running = false;
}
}
else {
System.out.println("PushExample._pushThread.new Runnable() {...}.run: removing " + pushSessionID);
_pushSessionIDs.remove(pushSessionID);
}
}
}
}
});
public WOActionResults push() {
if (_pushSessionIDs.contains(session().sessionID())) {
System.out.println("PushExample.push: stopping " + session().sessionID());
_pushSessionIDs.remove(session().sessionID());
}
else {
System.out.println("PushExample.push: starting " + session().sessionID());
_pushSessionIDs.add(session().sessionID());
}
return new ERXResponse("Sent some data");
}
}