ClientNotificationManagerpublic final class ClientNotificationManager extends Object implements Runnable| A NotificationManager class used on the client-side to mainly
call the NotificationListeners appropriately
whenever a notification is received from the server-side.
The ClientNotificationManager uses a NotificationReceiver running on a
separate thread to listen for notifications.
The ClientNotificationManager when constructed will make a connection
to the server-side with an unique id identifying this ClientNotificationManager. |
| Fields Summary |
|---|
| private final Map | env | | private final HashMap | listenerMap | | private final String | mgrId | | private final com.sun.enterprise.admin.jmx.remote.notification.SimpleQueue | que | | private final NotificationReceiver | receiver | | private final Thread | eventThread | | private volatile boolean | exit | | private static final Logger | logger |
| Constructors Summary |
|---|
public ClientNotificationManager(com.sun.enterprise.admin.jmx.remote.comm.HttpConnectorAddress ad, Map envIn)/*,
DefaultConfiguration.LOGGER_RESOURCE_BUNDLE_NAME );*/
env = envIn;
que = new SimpleQueue();
listenerMap = new HashMap();
String hname="null";
try {
hname = InetAddress.getLocalHost().getHostName();
} catch (Exception ex) {
/*ignore*/
hname = "null";
}
mgrId = (new java.rmi.server.UID()).toString() + ":" + hname;
eventThread = new Thread(this);
eventThread.start();
receiver = new NotificationReceiver(ad, this);
|
| Methods Summary |
|---|
| public java.lang.String | addNotificationListener(javax.management.ObjectName objname, javax.management.NotificationListener listener, javax.management.NotificationFilter filter, java.lang.Object handback)Registers the notification listener so that they may be called
in case a notification is received.
ListenerInfo info = new ListenerInfo();
info.listener = listener;
info.filter = filter;
info.handback = handback;
info.id = info.computeId();
ArrayList list = (ArrayList)listenerMap.get(objname);
if (list == null) {
list = new ArrayList();
}
list.add(info);
listenerMap.put(objname, list);
return info.id;
| | public void | close()
exit = true;
try {
receiver.exit();
} finally {
synchronized (que) {
que.notify();
}
eventThread.join();
}
| | public java.lang.String | getId()
return mgrId;
| | private boolean | isExiting()
return exit;
| | public void | raiseEvent(com.sun.enterprise.admin.jmx.remote.notification.NotificationWrapper wrapr)
synchronized (que) {
que.add(wrapr);
que.notify();
}
| | public boolean | reinit()A method to reinitialize the connection to the server-side in case
the connection gets dropped.
This method is called for every MBeanServerConnection method call.
return receiver.reinit();
| | public java.lang.String[] | removeNotificationListener(javax.management.ObjectName mbean, javax.management.NotificationListener listener)
String[] strs = removeNotificationListener(mbean, listener, null, null, true);
return strs;
| | public java.lang.String[] | removeNotificationListener(javax.management.ObjectName mbean, javax.management.NotificationListener listener, javax.management.NotificationFilter filter, java.lang.Object handback)
String[] strs = removeNotificationListener( mbean,
listener,
filter,
handback, false);
return strs;
| | private java.lang.String[] | removeNotificationListener(javax.management.ObjectName mbean, javax.management.NotificationListener listener, javax.management.NotificationFilter filter, java.lang.Object handback, boolean listenerOnly)Unregisters the notification listeners as per the logic defined by
MBeanServer.removeNotificationListener
1. -- all the registrations for the listener to the specified mbean
are removed.
2.
-- only that registration, for the listener, which was registered
with this filter and handback will be removed.
ArrayList idlist = new ArrayList();
ArrayList list = (ArrayList) listenerMap.get(mbean);
if (list == null) {
return (new String[0]);
}
ListenerInfo info1 = new ListenerInfo();
info1.listener = listener;
info1.filter = filter;
info1.handback = handback;
info1.id = info1.computeId();
Iterator itr = list.iterator();
// Because updating the list when we are iterating the list throws an exception,
// unless we return immediately
ArrayList list1 = (ArrayList) list.clone();
while (itr.hasNext()) {
ListenerInfo info = (ListenerInfo) itr.next();
if (!listenerOnly && info.id.equals(info1.id)) {
list1.remove(list1.indexOf(info));
idlist.add(info.id);
} else if (listenerOnly && info.listener == listener) {
list1.remove(list1.indexOf(info));
idlist.add(info.id);
}
}
listenerMap.put(mbean, list1);
String[] ids = new String[idlist.size()];
ids = (String[]) idlist.toArray(ids);
return ids;
| | public void | run()This is the event dispatch thread, which calls the notification listeners
as and when a notification is received for that listener.
while (!isExiting()) {
synchronized (que) {
while (que.isEmpty() && !isExiting()) {
try {
que.wait();
} catch (InterruptedException intre) {
}
}
}
if (isExiting())
break;
while (!que.isEmpty() && !isExiting()) {
NotificationWrapper wrapr = (NotificationWrapper) que.remove();
ObjectName source = wrapr.getSource();
Notification notif = wrapr.getNotification();
ArrayList listeners = (ArrayList) listenerMap.get(source);
Iterator itr = listeners.iterator();
while (itr.hasNext() && !isExiting()) {
ListenerInfo info = (ListenerInfo) itr.next();
boolean callListener = true;
if (info.filter != null)
callListener = info.filter.isNotificationEnabled(notif);
if (callListener)
info.listener.handleNotification(notif, info.handback);
}
}
}
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