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package com.sun.enterprise.admin.jmx.remote.notification;
import java.io.IOException;
import java.util.logging.Logger;
import java.util.Map;
import java.util.HashMap;
import java.util.ArrayList;
import java.util.Iterator;
import java.net.InetAddress;
import javax.management.*;
import com.sun.enterprise.admin.jmx.remote.notification.SimpleQueue;
import com.sun.enterprise.admin.jmx.remote.notification.NotificationWrapper;
import com.sun.enterprise.admin.jmx.remote.notification.ListenerInfo;
import com.sun.enterprise.admin.jmx.remote.comm.HttpConnectorAddress;
import com.sun.enterprise.admin.jmx.remote.DefaultConfiguration;
/**
* 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.
*/
public final class ClientNotificationManager implements Runnable {
private final Map env;
private final HashMap listenerMap;
private final String mgrId;
private final SimpleQueue que;
private final NotificationReceiver receiver;
private final Thread eventThread;
private volatile boolean exit = false;
private static final Logger logger = Logger.getLogger(
DefaultConfiguration.JMXCONNECTOR_LOGGER);/*,
DefaultConfiguration.LOGGER_RESOURCE_BUNDLE_NAME );*/
public ClientNotificationManager(HttpConnectorAddress ad, Map envIn)
throws IOException {
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);
}
public String getId() {
return mgrId;
}
/**
* 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.
*/
public boolean reinit() throws IOException {
return receiver.reinit();
}
/**
* Registers the notification listener so that they may be called
* in case a notification is received.
*/
public String addNotificationListener( ObjectName objname,
NotificationListener listener,
NotificationFilter filter,
Object handback) {
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 String[] removeNotificationListener(
ObjectName mbean,
NotificationListener listener) {
String[] strs = removeNotificationListener(mbean, listener, null, null, true);
return strs;
}
public String[] removeNotificationListener(
ObjectName mbean,
NotificationListener listener,
NotificationFilter filter,
Object handback) {
String[] strs = removeNotificationListener( mbean,
listener,
filter,
handback, false);
return strs;
}
/**
* Unregisters the notification listeners as per the logic defined by
* MBeanServer.removeNotificationListener
* 1. <mbean, listener> -- all the registrations for the listener to the specified mbean
* are removed.
* 2. <mbean, listener, filter, handback>
* -- only that registration, for the listener, which was registered
* with this filter and handback will be removed.
*/
private String[] removeNotificationListener(
ObjectName mbean,
NotificationListener listener,
NotificationFilter filter,
Object handback,
boolean listenerOnly) {
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 raiseEvent(NotificationWrapper wrapr) {
synchronized (que) {
que.add(wrapr);
que.notify();
}
}
private boolean isExiting() {
return exit;
}
public void close() throws Exception {
exit = true;
try {
receiver.exit();
} finally {
synchronized (que) {
que.notify();
}
eventThread.join();
}
}
/**
* This is the event dispatch thread, which calls the notification listeners
* as and when a notification is received for that listener.
*/
public void run() {
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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