--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/jdk/test/java/rmi/server/Unreferenced/finiteGCLatency/FiniteGCLatency.java	Sat Dec 01 00:00:00 2007 +0000
@@ -0,0 +1,122 @@
+/* 
+ * Copyright 1998 Sun Microsystems, Inc.  All Rights Reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code 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 General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
+ * CA 95054 USA or visit www.sun.com if you need additional information or
+ * have any questions.
+ */
+
+/* @test
+ * @bug 4164696
+ * @summary The local garbage collector needs to inspect a client VM's heap
+ * often enough (even if the VM is idle) to detect unreachable live remote
+ * references, so that their server VMs can be informed that the client VM
+ * is no longer holding a reference; this facilitates the server VM invoking
+ * the remote object's unreferenced() method (if present), garbage collecting
+ * the remote object, and allowing the server VM to exit.  This test focuses
+ * on the unreferenced() method being invoked: it tests that the callback
+ * method will be invoked within a reasonable time after the remote object is
+ * no longer remotely reachable.
+ * @author Peter Jones
+ *
+ * @library ../../../testlibrary
+ * @build FiniteGCLatency
+ * @build FiniteGCLatency_Stub
+ * @run main/othervm/timeout=120 FiniteGCLatency
+ */
+
+import java.rmi.*;
+import java.rmi.registry.*;
+import java.rmi.server.*;
+
+public class FiniteGCLatency implements Remote, Unreferenced {
+
+    private final static String BINDING = "FiniteGCLatency";
+    private final static long GC_INTERVAL = 6000;
+    private final static long TIMEOUT = 50000;
+
+    private Object lock = new Object();
+    private boolean unreferencedInvoked = false;
+
+    public void unreferenced() {
+	System.err.println("unreferenced() method invoked");
+	synchronized (lock) {
+	    unreferencedInvoked = true;
+	    lock.notify();
+	}
+    }
+
+    public static void main(String[] args) {
+
+	System.err.println("\nRegression test for bug 4164696\n");
+
+	/*
+	 * Set the interval that RMI will request for GC latency (before RMI
+	 * gets initialized and this property is read) to an unrealistically
+	 * small value, so that this test shouldn't have to wait too long.
+	 */
+	System.setProperty("sun.rmi.dgc.client.gcInterval",
+	    String.valueOf(GC_INTERVAL));
+
+	FiniteGCLatency obj = new FiniteGCLatency();
+
+	try {
+	    UnicastRemoteObject.exportObject(obj);
+	    System.err.println("exported remote object");
+
+	    LocateRegistry.createRegistry(TestLibrary.REGISTRY_PORT);
+	    System.err.println("created registry");
+
+	    Registry registry = LocateRegistry.getRegistry("", TestLibrary.REGISTRY_PORT);
+	    registry.bind(BINDING, obj);
+	    System.err.println("bound remote object in registry");
+
+	    synchronized (obj.lock) {
+		registry.unbind(BINDING);
+		System.err.println("unbound remote object from registry; " +
+		    "waiting for unreferenced() callback...");
+		obj.lock.wait(TIMEOUT);
+
+		if (obj.unreferencedInvoked) {
+		    System.err.println("TEST PASSED: unreferenced() invoked");
+		} else {
+		    throw new RuntimeException(
+			"TEST FAILED: unrefereced() not invoked after " +
+			((double) TIMEOUT / 1000.0) + " seconds");
+		}
+	    }
+
+	} catch (Exception e) {
+	    if (e instanceof RuntimeException) {
+		throw (RuntimeException) e;
+	    } else {
+		throw new RuntimeException(
+		    "TEST FAILED: unexpected exception: " + e.toString());
+	    }
+	} finally {
+	    /*
+	     * When all is said and done, try to unexport the remote object
+	     * so that the VM has a chance to exit.
+	     */
+	    try {
+		UnicastRemoteObject.unexportObject(obj, true);
+	    } catch (RemoteException e) {
+	    }
+	}
+    }
+}