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NOT PART OF THE BUILD - simple observer test to demonstrate use of weak references

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jband%netscape.com 2001-01-31 02:32:39 +00:00
parent b3988570b3
commit 3ad4de6403
1 changed files with 34 additions and 0 deletions
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34
js/src/xpconnect/tests/js/old/xpctest_observer.js Normal file
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const observerInterface = Components.interfaces.nsIObserverService;
const observerClazz = Components.classes["@mozilla.org/observer-service;1"];
var observerService = observerClazz.getService(observerInterface);
var observer1 = {
Observe : function(aSubject, aTopic, someData) {
print("observer1 notified for: "+aTopic+" with: "+someData);
},
QueryInterface: function (iid) {
if (iid.equals(Components.interfaces.nsISupportsWeakReference)) {
return this;
}
throw Components.results.NS_ERROR_NO_INTERFACE;
}
}
var observer2 = {
Observe : function(aSubject, aTopic, someData) {
print("observer2 notified for: "+aTopic+" with: "+someData);
}
}
const topic = "xpctest_observer_topic";
observerService.AddObserver(observer1, topic);
observerService.AddObserver(observer2, topic);
observerService.Notify(null, topic, "notification 1");
gc();
observer1 = null;
observer2 = null;
observerService.Notify(null, topic, "notification 2");
gc();
observerService.Notify(null, topic, "notification 3");