[jboss-cvs] JBossAS SVN: r64874 - trunk/jmx/src/main/org/jboss/mx/loading.
jboss-cvs-commits at lists.jboss.org
jboss-cvs-commits at lists.jboss.org
Sat Aug 25 00:31:14 EDT 2007
Author: scott.stark at jboss.org
Date: 2007-08-25 00:31:14 -0400 (Sat, 25 Aug 2007)
New Revision: 64874
Modified:
trunk/jmx/src/main/org/jboss/mx/loading/UnifiedLoaderRepository3.java
Log:
JBAS-4593, add property to control whether class loader addition/removal emits a notification
Modified: trunk/jmx/src/main/org/jboss/mx/loading/UnifiedLoaderRepository3.java
===================================================================
--- trunk/jmx/src/main/org/jboss/mx/loading/UnifiedLoaderRepository3.java 2007-08-25 04:26:43 UTC (rev 64873)
+++ trunk/jmx/src/main/org/jboss/mx/loading/UnifiedLoaderRepository3.java 2007-08-25 04:31:14 UTC (rev 64874)
@@ -1,26 +1,27 @@
/*
- * JBoss, Home of Professional Open Source
- * Copyright 2005, JBoss Inc., and individual contributors as indicated
- * by the @authors tag. See the copyright.txt in the distribution for a
- * full listing of individual contributors.
- *
- * This is free software; you can redistribute it and/or modify it
- * under the terms of the GNU Lesser General Public License as
- * published by the Free Software Foundation; either version 2.1 of
- * the License, or (at your option) any later version.
- *
- * This software is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with this software; if not, write to the Free
- * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
- * 02110-1301 USA, or see the FSF site: http://www.fsf.org.
- */
+ * JBoss, Home of Professional Open Source.
+ * Copyright 2006, Red Hat Middleware LLC, and individual contributors
+ * as indicated by the @author tags. See the copyright.txt file in the
+ * distribution for a full listing of individual contributors.
+ *
+ * This is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU Lesser General Public License as
+ * published by the Free Software Foundation; either version 2.1 of
+ * the License, or (at your option) any later version.
+ *
+ * This software is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this software; if not, write to the Free
+ * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
+ * 02110-1301 USA, or see the FSF site: http://www.fsf.org.
+ */
package org.jboss.mx.loading;
+import java.lang.ref.WeakReference;
import java.net.MalformedURLException;
import java.net.URL;
import java.net.URLClassLoader;
@@ -74,6 +75,17 @@
/** Used to provide a relative ordering of UCLs based on the order in
* which they are added to the repository */
private static int addedCount;
+ /** The jmx notification behavior mode. This is set by the
+ * org.jboss.mx.loading.UnifiedLoaderRepository.notifyMode system
+ * property.
+ */
+ // Send notification with the ClassLoader as the user data
+ private static final int LEGACY_MODE = 0;
+ // Send notification with the ClassLoader as the user data wrapped in a WeakReference
+ private static final int WEAK_REFERENCE_MODE = 1;
+ // Don't send any notifications
+ private static final int NO_NOTIFICATION_MODE = 2;
+ private static int NOTIFICATION_MODE;
// Attributes ----------------------------------------------------
@@ -150,6 +162,24 @@
*/
private MBeanNotificationInfo[] info;
+ static
+ {
+ // JBAS-4593 notification behavior
+ String value = ClassToStringAction.getProperty("org.jboss.mx.loading.UnifiedLoaderRepository.notifyMode", "0");
+ NOTIFICATION_MODE = Integer.valueOf(value).intValue();
+ switch(NOTIFICATION_MODE)
+ {
+ case LEGACY_MODE:
+ case WEAK_REFERENCE_MODE:
+ case NO_NOTIFICATION_MODE:
+ break;
+ default:
+ log.warn("Invalid org.jboss.mx.loading.UnifiedLoaderRepository.notifyMode("
+ +value+"), defaulting to LEGACY_MODE");
+ NOTIFICATION_MODE = LEGACY_MODE;
+ break;
+ }
+ }
// Public --------------------------------------------------------
@@ -935,9 +965,15 @@
broadcaster.sendNotification(msg);
}
- Notification msg = new Notification(CLASSLOADER_REMOVED, this, getNextSequenceNumber());
- msg.setUserData(cl);
- broadcaster.sendNotification(msg);
+ if (NOTIFICATION_MODE == LEGACY_MODE || NOTIFICATION_MODE == WEAK_REFERENCE_MODE)
+ {
+ Notification msg = new Notification(CLASSLOADER_REMOVED, this, getNextSequenceNumber());
+ if (NOTIFICATION_MODE == WEAK_REFERENCE_MODE)
+ msg.setUserData(new WeakReference(cl));
+ else
+ msg.setUserData(cl);
+ broadcaster.sendNotification(msg);
+ }
}
/**
@@ -952,9 +988,15 @@
public LoaderRepository registerClassLoader(RepositoryClassLoader ucl)
{
addClassLoader(ucl);
- Notification msg = new Notification(CLASSLOADER_ADDED, this, getNextSequenceNumber());
- msg.setUserData(ucl);
- broadcaster.sendNotification(msg);
+ if (NOTIFICATION_MODE == LEGACY_MODE || NOTIFICATION_MODE == WEAK_REFERENCE_MODE)
+ {
+ Notification msg = new Notification(CLASSLOADER_ADDED, this, getNextSequenceNumber());
+ if (NOTIFICATION_MODE == WEAK_REFERENCE_MODE)
+ msg.setUserData(new WeakReference(ucl));
+ else
+ msg.setUserData(ucl);
+ broadcaster.sendNotification(msg);
+ }
return this;
}
@@ -991,15 +1033,22 @@
{
if (info == null)
{
- info = new MBeanNotificationInfo[]{
- new MBeanNotificationInfo(new String[]{"CLASSLOADER_ADDED"},
- "javax.management.Notification",
- "Notification that a classloader has been added to the extensible classloader"),
- new MBeanNotificationInfo(new String[]{"CLASS_REMOVED"},
- "javax.management.Notification",
- "Notification that a class has been removed from the extensible classloader")
-
- };
+ if (NOTIFICATION_MODE != NO_NOTIFICATION_MODE)
+ {
+ info = new MBeanNotificationInfo[]{
+ new MBeanNotificationInfo(new String[]{"CLASSLOADER_ADDED"},
+ "javax.management.Notification",
+ "Notification that a classloader has been added to the extensible classloader"),
+ new MBeanNotificationInfo(new String[]{"CLASS_REMOVED"},
+ "javax.management.Notification",
+ "Notification that a class has been removed from the extensible classloader")
+
+ };
+ }
+ else
+ {
+ info = new MBeanNotificationInfo[0];
+ }
}
return info;
}
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