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/*
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* Copyright (c) 2012, 2018, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*
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*/
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#ifndef SHARE_VM_JFR_RECORDER_REPOSITORY_JFRREPOSITORY_HPP
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#define SHARE_VM_JFR_RECORDER_REPOSITORY_JFRREPOSITORY_HPP
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#include "jni.h"
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#include "jfr/utilities/jfrAllocation.hpp"
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class JfrChunkWriter;
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class JfrPostBox;
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//
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// Represents the location on disk where internal files, "chunks", are stored.
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//
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// A "chunk" is a self-contained file artifact storing events and metadata that
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// has been moved out of process memory.
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//
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// Chunk files are associated with recordings and are managed at a higher level in Java.
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// Java continously keeps the VM informed about new chunk locations via set_chunk_path().
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//
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// A JfrChunkWriter will open the next chunk file which it maintains as the current chunk.
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// There is a rotation scheme in place for creating new chunks at certain intervals.
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//
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class JfrRepository : public JfrCHeapObj {
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friend class JfrRecorder;
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friend class JfrRecorderService;
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private:
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char* _path;
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JfrPostBox& _post_box;
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JfrRepository(JfrPostBox& post_box);
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~JfrRepository();
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bool set_path(const char* path);
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void set_chunk_path(const char* path);
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bool open_chunk(bool vm_error = false);
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size_t close_chunk(jlong metadata_offset);
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void on_vm_error();
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static void notify_on_new_chunk_path();
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static JfrChunkWriter& chunkwriter();
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static JfrRepository& instance();
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static JfrRepository* create(JfrPostBox& post_box);
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bool initialize();
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static void destroy();
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public:
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static void set_path(jstring location, JavaThread* jt);
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static void set_chunk_path(jstring path, JavaThread* jt);
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};
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#endif // SHARE_VM_JFR_RECORDER_REPOSITORY_JFRREPOSITORY_HPP
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