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