/*

 * 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.

 *

 */

#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);

};