author | mgronlun |
Fri, 11 Oct 2019 19:46:05 +0200 | |
branch | JEP-349-branch |
changeset 58567 | e77a97d0edbb |
parent 57360 | 5d043a159d5c |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 2012, 2019, 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_JFR_RECORDER_REPOSITORY_JFRREPOSITORY_HPP |
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#define SHARE_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(); |
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size_t flush_chunk(); |
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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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static void flush(JavaThread* jt); |
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static jlong current_chunk_start_nanos(); |
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}; |
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#endif // SHARE_JFR_RECORDER_REPOSITORY_JFRREPOSITORY_HPP |