--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/java.net.http/share/classes/jdk/internal/net/http/websocket/MessageStreamConsumer.java	Tue Apr 17 08:54:17 2018 -0700
@@ -0,0 +1,52 @@
+/*
+ * Copyright (c) 2015, 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.internal.net.http.websocket;
+
+import java.nio.ByteBuffer;
+
+/*
+ * A callback for consuming messages and related events on the stream.
+ */
+interface MessageStreamConsumer {
+
+    void onText(CharSequence data, boolean last);
+
+    void onBinary(ByteBuffer data, boolean last);
+
+    void onPing(ByteBuffer data);
+
+    void onPong(ByteBuffer data);
+
+    void onClose(int statusCode, CharSequence reason);
+
+    /*
+     * Indicates the end of stream has been reached and there will be no further
+     * messages.
+     */
+    void onComplete();
+
+    void onError(Throwable e);
+}