--- /dev/null	2019-01-28 17:47:36.000000000 +0800
+++ new/src/share/vm/jfr/recorder/repository/jfrRepository.hpp	2019-01-28 17:47:35.000000000 +0800
@@ -0,0 +1,73 @@
+/*
+ * Copyright (c) 2012, 2019, 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.
+ *
+ * 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.
+ *
+ */
+#ifndef SHARE_VM_JFR_RECORDER_REPOSITORY_JFRREPOSITORY_HPP
+#define SHARE_VM_JFR_RECORDER_REPOSITORY_JFRREPOSITORY_HPP
+
+#include "jni.h"
+#include "jfr/utilities/jfrAllocation.hpp"
+
+class JfrChunkWriter;
+class JfrPostBox;
+
+//
+// Represents the location on disk where internal files, "chunks", are stored.
+//
+// A "chunk" is a self-contained file artifact storing events and metadata that
+// has been moved out of process memory.
+//
+// Chunk files are associated with recordings and are managed at a higher level in Java.
+// Java continously keeps the VM informed about new chunk locations via set_chunk_path().
+//
+// A JfrChunkWriter will open the next chunk file which it maintains as the current chunk.
+// There is a rotation scheme in place for creating new chunks at certain intervals.
+//
+class JfrRepository : public JfrCHeapObj {
+  friend class JfrRecorder;
+  friend class JfrRecorderService;
+ private:
+  char* _path;
+  JfrPostBox& _post_box;
+
+  JfrRepository(JfrPostBox& post_box);
+  ~JfrRepository();
+
+  bool set_path(const char* path);
+  void set_chunk_path(const char* path);
+  bool open_chunk(bool vm_error = false);
+  size_t close_chunk(jlong metadata_offset);
+  void on_vm_error();
+  static void notify_on_new_chunk_path();
+  static JfrChunkWriter& chunkwriter();
+
+  static JfrRepository& instance();
+  static JfrRepository* create(JfrPostBox& post_box);
+  bool initialize();
+  static void destroy();
+
+ public:
+  static void set_path(jstring location, JavaThread* jt);
+  static void set_chunk_path(jstring path, JavaThread* jt);
+};
+
+#endif // SHARE_VM_JFR_RECORDER_REPOSITORY_JFRREPOSITORY_HPP