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Because unsolicited notifications are sent asynchronously by the server, you can use the same event model used for receiving notifications about namespace changes and object content changes. You register interest in receiving unsolicited notifications by registering an UnsolicitedNotificationListener with an EventContext or EventDirContext.
Here is an example of an UnsolicitedNotificationListener.
public class UnsolListener implements UnsolicitedNotificationListener {
public void notificationReceived(UnsolicitedNotificationEvent evt) {
System.out.println("received: " + evt);
}
public void namingExceptionThrown(NamingExceptionEvent evt) {
System.out.println(">>> UnsolListener got an exception");
evt.getException().printStackTrace();
}
}
Following is an example that registers an implementation of UnsolicitedNotificationListener with an event source. Note that only the listener argument to EventContext.addNamingListener() is relevant. The name and scope parameters are not relevant to unsolicited notifications.
// Get the event context for registering the listener
EventContext ctx = (EventContext)
(new InitialContext(env).lookup("ou=People"));
// Create the listener
NamingListener listener = new UnsolListener();
// Register the listener with the context (all targets equivalent)
ctx.addNamingListener("", EventContext.ONELEVEL_SCOPE, listener);
A listener that implements UnsolicitedNotificationListener can also implement other NamingListener interfaces, such as NamespaceChangeListener and ObjectChangeListener.
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