99 lines
3.3 KiB
C++
99 lines
3.3 KiB
C++
/*
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* Copyright (c) 2015, 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_LOGGING_LOGFILEOUTPUT_HPP
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#define SHARE_VM_LOGGING_LOGFILEOUTPUT_HPP
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#include "logging/logFileStreamOutput.hpp"
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#include "runtime/semaphore.hpp"
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#include "utilities/globalDefinitions.hpp"
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class LogDecorations;
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// The log file output, with support for file rotation based on a target size.
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class LogFileOutput : public LogFileStreamOutput {
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private:
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static const char* FileOpenMode;
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static const char* FileCountOptionKey;
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static const char* FileSizeOptionKey;
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static const char* PidFilenamePlaceholder;
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static const char* TimestampFilenamePlaceholder;
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static const char* TimestampFormat;
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static const size_t DefaultFileCount = 5;
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static const size_t DefaultFileSize = 20 * M;
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static const size_t StartTimeBufferSize = 20;
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static const size_t PidBufferSize = 21;
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static const uint MaxRotationFileCount = 1000;
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static char _pid_str[PidBufferSize];
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static char _vm_start_time_str[StartTimeBufferSize];
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const char* _name;
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char* _file_name;
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char* _archive_name;
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uint _current_file;
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uint _file_count;
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uint _file_count_max_digits;
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size_t _archive_name_len;
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size_t _rotate_size;
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size_t _current_size;
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// Semaphore used for synchronizing file rotations and writes
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Semaphore _rotation_semaphore;
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void archive();
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void rotate();
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bool parse_options(const char* options, outputStream* errstream);
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char *make_file_name(const char* file_name, const char* pid_string, const char* timestamp_string);
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bool should_rotate() {
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return _file_count > 0 && _rotate_size > 0 && _current_size >= _rotate_size;
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}
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void increment_file_count() {
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_current_file++;
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if (_current_file == _file_count) {
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_current_file = 0;
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}
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}
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public:
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LogFileOutput(const char *name);
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virtual ~LogFileOutput();
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virtual bool initialize(const char* options, outputStream* errstream);
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virtual int write(const LogDecorations& decorations, const char* msg);
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virtual int write(LogMessageBuffer::Iterator msg_iterator);
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virtual void force_rotate();
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virtual void describe(outputStream *out);
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virtual const char* name() const {
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return _name;
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}
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static const char* Prefix;
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static void set_file_name_parameters(jlong start_time);
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};
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#endif // SHARE_VM_LOGGING_LOGFILEOUTPUT_HPP
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