mirror of https://github.com/facebook/rocksdb.git
91 lines
2.6 KiB
C++
91 lines
2.6 KiB
C++
// Copyright (c) 2011 The LevelDB Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file. See the AUTHORS file for names of contributors.
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//
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// Logger implementation that can be shared by all environments
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// where enough posix functionality is available.
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#ifndef STORAGE_LEVELDB_UTIL_AUTO_ROLL_LOGGER_H
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#define STORAGE_LEVELDB_UTIL_AUTO_ROLL_LOGGER_H
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#include "util/posix_logger.h"
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#include "db/filename.h"
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namespace leveldb {
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// Rolls the log file by size and/or time
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class AutoRollLogger : public Logger {
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public:
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AutoRollLogger(Env* env, const std::string& dbname,
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const std::string& db_log_dir,
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size_t log_max_size,
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size_t log_file_time_to_roll):
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dbname_(dbname),
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db_log_dir_(db_log_dir),
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env_(env),
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status_(Status::OK()),
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kMaxLogFileSize(log_max_size),
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kLogFileTimeToRoll(log_file_time_to_roll),
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cached_now(static_cast<uint64_t>(env_->NowMicros() * 1e-6)),
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ctime_(cached_now),
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cached_now_access_count(0),
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call_NowMicros_every_N_records_(100) {
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env->GetAbsolutePath(dbname, &db_absolute_path_);
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log_fname_ = InfoLogFileName(dbname_, db_absolute_path_, db_log_dir_);
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RollLogFile();
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ResetLogger();
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}
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void Logv(const char* format, va_list ap);
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// check if the logger has encountered any problem.
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Status GetStatus() {
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return status_;
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}
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size_t GetLogFileSize() const {
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return logger_->GetLogFileSize();
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}
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virtual ~AutoRollLogger() {
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}
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void SetCallNowMicrosEveryNRecords(uint64_t call_NowMicros_every_N_records) {
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call_NowMicros_every_N_records_ = call_NowMicros_every_N_records;
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}
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private:
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bool LogExpired();
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Status ResetLogger();
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void RollLogFile();
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std::string log_fname_; // Current active info log's file name.
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std::string dbname_;
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std::string db_log_dir_;
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std::string db_absolute_path_;
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Env* env_;
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std::shared_ptr<Logger> logger_;
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// current status of the logger
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Status status_;
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const size_t kMaxLogFileSize;
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const size_t kLogFileTimeToRoll;
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// to avoid frequent env->NowMicros() calls, we cached the current time
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uint64_t cached_now;
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uint64_t ctime_;
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uint64_t cached_now_access_count;
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uint64_t call_NowMicros_every_N_records_;
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};
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// Facade to craete logger automatically
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Status CreateLoggerFromOptions(
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const std::string& dbname,
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const std::string& db_log_dir,
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Env* env,
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const Options& options,
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std::shared_ptr<Logger>* logger);
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} // namespace leveldb
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#endif // STORAGE_LEVELDB_UTIL_AUTO_ROLL_LOGGER_H
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