--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/jdk/src/jdk.jstatd/share/classes/sun/jvmstat/perfdata/monitor/protocol/rmi/PerfDataBuffer.java	Wed Apr 27 12:06:51 2016 -0700
@@ -0,0 +1,92 @@
+/*
+ * Copyright (c) 2004, Oracle and/or its affiliates. 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.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package sun.jvmstat.perfdata.monitor.protocol.rmi;
+
+import sun.jvmstat.monitor.*;
+import sun.jvmstat.monitor.remote.*;
+import sun.jvmstat.perfdata.monitor.*;
+import java.io.*;
+import java.rmi.RemoteException;
+import java.nio.ByteBuffer;
+
+/**
+ * The concrete PerfDataBuffer implementation for the <em>rmi:</em>
+ * protocol for the HotSpot PerfData monitoring implementation.
+ * <p>
+ * This class is responsible for acquiring the instrumentation buffer
+ * data for a remote target HotSpot Java Virtual Machine.
+ *
+ * @author Brian Doherty
+ * @since 1.5
+ */
+public class PerfDataBuffer extends AbstractPerfDataBuffer {
+
+    private RemoteVm rvm;
+
+    /**
+     * Create a PerfDataBuffer instance for accessing the specified
+     * instrumentation buffer.
+     *
+     * @param rvm the proxy to the remote MonitredVm object
+     * @param lvmid the local Java Virtual Machine Identifier of the
+     *              remote target.
+     *
+     * @throws MonitorException
+     */
+    public PerfDataBuffer(RemoteVm rvm, int lvmid) throws MonitorException {
+
+        this.rvm = rvm;
+        try {
+            ByteBuffer buffer = ByteBuffer.allocate(rvm.getCapacity());
+            sample(buffer);
+            createPerfDataBuffer(buffer, lvmid);
+
+        } catch (RemoteException e) {
+            throw new MonitorException("Could not read data for remote JVM "
+                                       + lvmid, e);
+        }
+    }
+
+    /**
+     * Get a copy of the remote instrumentation buffer.
+     *<p>
+     * The data in the remote instrumentation buffer is copied into
+     * the local byte buffer.
+     *
+     * @param buffer the buffer to receive the copy of the remote
+     *               instrumentation buffer.
+     * @throws RemoteException Thrown on any communications errors with
+     *                         the remote system.
+     */
+    public void sample(ByteBuffer buffer) throws RemoteException {
+        assert buffer != null;
+        assert rvm != null;
+        synchronized(buffer) {
+            buffer.clear();
+            buffer.put(rvm.getBytes());
+        }
+    }
+}