--- /dev/null	2019-02-07 20:54:51.336000000 +0300
+++ new/src/share/classes/jdk/management/jfr/Stream.java	2019-02-08 18:32:43.429906443 +0300
@@ -0,0 +1,81 @@
+/*
+ * Copyright (c) 2016, 2018, 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 jdk.management.jfr;
+
+import java.io.BufferedInputStream;
+import java.io.Closeable;
+import java.io.IOException;
+import java.io.InputStream;
+
+final class Stream implements Closeable {
+
+    private final long identifier;
+    private final BufferedInputStream inputStream;
+    private final byte[] buffer;
+
+    private volatile long time;
+
+    Stream(InputStream is, long identifier, int blockSize) {
+        this.inputStream = new BufferedInputStream(is, 50000);
+        this.identifier = identifier;
+        this.buffer = new byte[blockSize];
+    }
+
+    private void touch() {
+        time = System.currentTimeMillis();
+    }
+
+    public long getLastTouched() {
+        return time;
+    }
+
+    public byte[] read() throws IOException {
+        // OK to reuse buffer since this
+        // is only used for serialization
+        touch();
+        int read = inputStream.read(buffer);
+        if (read == -1) {
+            // null indicate no more data
+            return null;
+        }
+        if (read != buffer.length) {
+            byte[] smallerBuffer = new byte[read];
+            System.arraycopy(buffer, 0, smallerBuffer, 0, read);
+            return smallerBuffer;
+        }
+
+        return buffer;
+    }
+
+    @Override
+    public void close() throws IOException {
+        inputStream.close();
+    }
+
+    public long getId() {
+        return identifier;
+    }
+}