Mercurial > jdk8-mips64-public > hotspot / file comparison
comparison: src/share/vm/jfr/recorder/repository/jfrRepository.hpp
src/share/vm/jfr/recorder/repository/jfrRepository.hpp
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| 1 /* | |
| 2 * Copyright (c) 2012, 2018, Oracle and/or its affiliates. All rights reserved. | |
| 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. | |
| 4 * | |
| 5 * This code is free software; you can redistribute it and/or modify it | |
| 6 * under the terms of the GNU General Public License version 2 only, as | |
| 7 * published by the Free Software Foundation. | |
| 8 * | |
| 9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
| 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 12 * version 2 for more details (a copy is included in the LICENSE file that | |
| 13 * accompanied this code). | |
| 14 * | |
| 15 * You should have received a copy of the GNU General Public License version | |
| 16 * 2 along with this work; if not, write to the Free Software Foundation, | |
| 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
| 18 * | |
| 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA | |
| 20 * or visit www.oracle.com if you need additional information or have any | |
| 21 * questions. | |
| 22 * | |
| 23 */ | |
| 24 #ifndef SHARE_VM_JFR_RECORDER_REPOSITORY_JFRREPOSITORY_HPP | |
| 25 #define SHARE_VM_JFR_RECORDER_REPOSITORY_JFRREPOSITORY_HPP | |
| 26 | |
| 27 #include "jni.h" | |
| 28 #include "jfr/utilities/jfrAllocation.hpp" | |
| 29 | |
| 30 class JfrChunkWriter; | |
| 31 class JfrPostBox; | |
| 32 | |
| 33 // | |
| 34 // Represents the location on disk where internal files, "chunks", are stored. | |
| 35 // | |
| 36 // A "chunk" is a self-contained file artifact storing events and metadata that | |
| 37 // has been moved out of process memory. | |
| 38 // | |
| 39 // Chunk files are associated with recordings and are managed at a higher level in Java. | |
| 40 // Java continously keeps the VM informed about new chunk locations via set_chunk_path(). | |
| 41 // | |
| 42 // A JfrChunkWriter will open the next chunk file which it maintains as the current chunk. | |
| 43 // There is a rotation scheme in place for creating new chunks at certain intervals. | |
| 44 // | |
| 45 class JfrRepository : public JfrCHeapObj { | |
| 46 friend class JfrRecorder; | |
| 47 friend class JfrRecorderService; | |
| 48 private: | |
| 49 char* _path; | |
| 50 JfrPostBox& _post_box; | |
| 51 | |
| 52 JfrRepository(JfrPostBox& post_box); | |
| 53 ~JfrRepository(); | |
| 54 | |
| 55 bool set_path(const char* path); | |
| 56 void set_chunk_path(const char* path); | |
| 57 bool open_chunk(bool vm_error = false); | |
| 58 size_t close_chunk(jlong metadata_offset); | |
| 59 void on_vm_error(); | |
| 60 static void notify_on_new_chunk_path(); | |
| 61 static JfrChunkWriter& chunkwriter(); | |
| 62 | |
| 63 static JfrRepository& instance(); | |
| 64 static JfrRepository* create(JfrPostBox& post_box); | |
| 65 bool initialize(); | |
| 66 static void destroy(); | |
| 67 | |
| 68 public: | |
| 69 static void set_path(jstring location, JavaThread* jt); | |
| 70 static void set_chunk_path(jstring path, JavaThread* jt); | |
| 71 }; | |
| 72 | |
| 73 #endif // SHARE_VM_JFR_RECORDER_REPOSITORY_JFRREPOSITORY_HPP |
