--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/components/visual-panels/core/src/java/vpanels/panel/com/oracle/solaris/vp/panel/common/MXBeanTracker.java	Thu May 24 04:16:47 2012 -0400
@@ -0,0 +1,192 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+
+/*
+ * Copyright (c) 2010, 2012, Oracle and/or its affiliates. All rights reserved.
+ */
+
+package com.oracle.solaris.vp.panel.common;
+
+import java.beans.PropertyChangeEvent;
+import java.io.IOException;
+import java.util.logging.*;
+import javax.management.*;
+import com.oracle.solaris.adr.Stability;
+import com.oracle.solaris.rad.jmx.*;
+import com.oracle.solaris.vp.util.misc.ObjectUtil;
+import com.oracle.solaris.vp.util.misc.event.PropertyChangeListeners;
+
+/**
+ * The {@code MXBeanTracker} is a {@link ConnectionTracker} that automatically
+ * creates and re-creates an {@link #getBean MXBean} after changes in the {@link
+ * #setMBeanServerConnection MBeanServerConnection} or {@link #setObjectName
+ * ObjectName}.
+ * </p>
+ * A property change notification is sent out when the tracked {@code MXBean}
+ * changes.
+ */
+public class MXBeanTracker<T> extends ConnectionTracker {
+    //
+    // Static data
+    //
+
+    /**
+     * The name of the property that changes with {@link #setBean}.
+     */
+    public static final String PROPERTY_BEAN = "bean";
+
+    //
+    // Instance data
+    //
+
+    private Class<T> clazz;
+    private T bean;
+    private Stability stability;
+
+    //
+    // Constructors
+    //
+
+    public MXBeanTracker(ObjectName oName, Class<T> clazz, Stability stability)
+    {
+	super(oName);
+	try {
+	    setClass(clazz, stability);
+
+	// Impossible because mbsc not yet set
+	} catch (TrackerException impossible) {
+	}
+    }
+
+    public MXBeanTracker(ObjectName oName, Class<T> clazz, Stability stability,
+	ClientContext context) throws TrackerException {
+
+	this(oName, clazz, stability);
+	setClientContext(context);
+    }
+
+    //
+    // ConnectionTracker methods
+    //
+
+    @Override
+    public void setMBeanServerConnection(MBeanServerConnection mbsc)
+	throws TrackerException {
+
+	if (getMBeanServerConnection() != mbsc) {
+	    super.setMBeanServerConnection(mbsc);
+	    setBean();
+	}
+    }
+
+    @Override
+    public void setObjectName(ObjectName oName)
+	throws TrackerException {
+
+	if (!ObjectUtil.equals(getObjectName(), oName)) {
+	    super.setObjectName(oName);
+	    setBean();
+	}
+    }
+
+    //
+    // MXBeanTracker methods
+    //
+
+    protected T createBean() throws JMException,
+	IncompatibleVersionException, IOException {
+
+	T bean = null;
+	MBeanServerConnection mbsc = getMBeanServerConnection();
+	ObjectName oName = getObjectName();
+	if (mbsc != null && oName != null && clazz != null && stability != null)
+	{
+	    bean = RadJMX.newMXBeanProxy(mbsc, oName, clazz, stability);
+	}
+
+	return bean;
+    }
+
+    public T getBean() {
+	return bean;
+    }
+
+    public Class<T> getBeanClass() {
+	return clazz;
+    }
+
+    public Stability getStability() {
+	return stability;
+    }
+
+    public void setBean(T bean) {
+	if (this.bean != bean) {
+	    PropertyChangeEvent e = new PropertyChangeEvent(
+		this, PROPERTY_BEAN, this.bean, bean);
+	    this.bean = bean;
+	    getPropertyChangeListeners().propertyChange(e);
+	}
+    }
+
+    //
+    // Private methods
+    //
+
+    private void setClass(Class<T> clazz, Stability stability)
+	throws TrackerException {
+
+	this.clazz = clazz;
+	this.stability = stability;
+	setBean();
+    }
+
+    private void setBean() throws TrackerException {
+	T bean = null;
+	String message = null;
+	Throwable cause = null;
+
+	try {
+	    bean = createBean();
+
+	} catch (IncompatibleVersionException e) {
+	    cause = e;
+	    message = "Incompatible client and server versions for: "
+		+ clazz.getSimpleName();
+
+	} catch (JMException e) {
+	    cause = e;
+	    message = "Error getting MBean information for: " + getObjectName();
+
+	} catch (IOException e) {
+	    cause = e;
+	    message = "Error contacting MBean server while "
+		+ "creating proxy for: " + clazz.getSimpleName();
+	}
+
+	setBean(bean);
+
+	if (cause != null) {
+	    Logger.getLogger(getClass().getName()).log(
+		Level.SEVERE, message, cause);
+	    throw new TrackerException(cause);
+	}
+    }
+}