logFileOutput.hpp (original) (raw)

1 /* 2 * Copyright (c) 2015, 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_LOGGING_LOGFILEOUTPUT_HPP 25 #define SHARE_VM_LOGGING_LOGFILEOUTPUT_HPP 26 #include "logging/logFileStreamOutput.hpp" 27 #include "utilities/globalDefinitions.hpp" 28 #include "runtime/mutex.hpp" 29 30 class LogDecorations; 31 32 // The log file output, with support for file rotation based on a target size. 33 class LogFileOutput : public LogFileStreamOutput { 34 private: 35 static const char FileOpenMode; 36 static const char* FileCountOptionKey; 37 static const char* FileSizeOptionKey; 38 static const char* PidFilenamePlaceholder; 39 static const char* TimestampFilenamePlaceholder; 40 static const char* TimestampFormat; 41 static const size_t StartTimeBufferSize = 20; 42 static const size_t PidBufferSize = 21; 43 static char _pid_str[PidBufferSize]; 44 static char _vm_start_time_str[StartTimeBufferSize]; 45 46 Mutex _rotation_lock; 47 const char* _name; 48 char* _file_name; 49 char* _archive_name; 50 51 uint _current_file; 52 uint _file_count; 53 uint _file_count_max_digits; 54 55 size_t _archive_name_len; 56 size_t _rotate_size; 57 size_t _current_size; 58 59 void archive(); 60 void rotate(); 61 bool configure_rotation(const char* options); 62 char make_file_name(const char file_name, const char* pid_string, const char* timestamp_string); 63 static size_t parse_value(const char* value_str); 64 65 bool should_rotate() const { 66 return _file_count > 0 && _rotate_size > 0 && _current_size >= _rotate_size; 67 } 68 69 public: 70 LogFileOutput(const char name); 71 virtual ~LogFileOutput(); 72 virtual bool initialize(const char options); 73 virtual int write(const LogDecorations& decorations, const char* msg); 74 75 virtual const char* name() const { 76 return _name; 77 } 78 79 static void set_file_name_parameters(jlong start_time); 80 }; 81 #endif