mirror of
https://github.com/nestriness/cdc-file-transfer.git
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4326e972ac
The tools allow efficient and fast synchronization of large directory trees from a Windows workstation to a Linux target machine. cdc_rsync* support efficient copy of files by using content-defined chunking (CDC) to identify chunks within files that can be reused. asset_stream_manager + cdc_fuse_fs support efficient streaming of a local directory to a remote virtual file system based on FUSE. It also employs CDC to identify and reuse unchanged data chunks.
145 lines
4.8 KiB
C++
145 lines
4.8 KiB
C++
/*
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* Copyright 2022 Google LLC
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef COMMON_LOG_H_
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#define COMMON_LOG_H_
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#include <memory>
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#include "absl/strings/str_format.h"
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#include "absl/synchronization/mutex.h"
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#include "common/clock.h"
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namespace cdc_ft {
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enum class LogLevel { kVerbose, kDebug, kInfo, kWarning, kError };
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// Note: Bazel always uses forward slashes for paths.
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#define __FILENAME__ \
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(strrchr(__FILE__, '/') ? strrchr(__FILE__, '/') + 1 : __FILE__)
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#define LOG_VERBOSE(...) \
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::cdc_ft::Log::SafePrintf(::cdc_ft::LogLevel::kVerbose, __FILENAME__, \
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__LINE__, __func__, __VA_ARGS__);
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#define LOG_DEBUG(...) \
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::cdc_ft::Log::SafePrintf(::cdc_ft::LogLevel::kDebug, __FILENAME__, \
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__LINE__, __func__, __VA_ARGS__);
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#define LOG_INFO(...) \
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::cdc_ft::Log::SafePrintf(::cdc_ft::LogLevel::kInfo, __FILENAME__, __LINE__, \
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__func__, __VA_ARGS__);
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#define LOG_WARNING(...) \
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::cdc_ft::Log::SafePrintf(::cdc_ft::LogLevel::kWarning, __FILENAME__, \
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__LINE__, __func__, __VA_ARGS__);
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#define LOG_ERROR(...) \
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::cdc_ft::Log::SafePrintf(::cdc_ft::LogLevel::kError, __FILENAME__, \
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__LINE__, __func__, __VA_ARGS__);
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#define LOG_LEVEL(level, ...) \
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::cdc_ft::Log::SafePrintf(level, __FILENAME__, __LINE__, __func__, \
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__VA_ARGS__);
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class Log {
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public:
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// Initializes the Log singleton. Should be called in the beginning.
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static void Initialize(std::unique_ptr<Log> log);
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// Deletes the Log singleton. Must be called in the end.
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static void Shutdown();
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// Returns the global log instance.
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static Log* Instance();
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template <typename... Args>
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static void SafePrintf(LogLevel level, const char* file, int line,
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const char* func,
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const absl::FormatSpec<Args...>& format,
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Args... args) {
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Log* inst = MaybeNullInstance();
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if (inst) {
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inst->Printf(level, file, line, func, format, args...);
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} else {
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DefaultWriteLogMessage(level, file, line,
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absl::StrFormat(format, args...).c_str());
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}
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}
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template <typename... Args>
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void Printf(LogLevel level, const char* file, int line, const char* func,
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const absl::FormatSpec<Args...>& format, Args... args) {
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if (log_level_ <= level) {
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WriteLogMessage(level, file, line, func,
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absl::StrFormat(format, args...).c_str());
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}
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}
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static LogLevel VerbosityToLogLevel(int verbosity);
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void SetLogLevel(LogLevel log_level) { log_level_ = log_level; }
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LogLevel GetLogLevel() const { return log_level_; }
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virtual ~Log();
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protected:
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explicit Log(LogLevel log_level) : log_level_(log_level) {}
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virtual void WriteLogMessage(LogLevel level, const char* file, int line,
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const char* func, const char* message) = 0;
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private:
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// A default log writer implementation in case the log was not initialized.
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static void DefaultWriteLogMessage(LogLevel level, const char* file, int line,
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const char* message);
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// Returns the global log instance.
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static Log* MaybeNullInstance();
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static Log* instance_;
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LogLevel log_level_;
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};
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class ConsoleLog : public Log {
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public:
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explicit ConsoleLog(LogLevel log_level) : Log(log_level) {}
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protected:
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void WriteLogMessage(LogLevel level, const char* file, int line,
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const char* func, const char* message) override
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ABSL_LOCKS_EXCLUDED(mutex_);
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private:
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absl::Mutex mutex_;
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};
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class FileLog : public Log {
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public:
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FileLog(LogLevel log_level, const char* path);
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~FileLog();
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protected:
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void WriteLogMessage(LogLevel level, const char* file, int line,
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const char* func, const char* message) override
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ABSL_LOCKS_EXCLUDED(mutex_);
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private:
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FILE* file_;
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DefaultSystemClock clock_;
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absl::Mutex mutex_;
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};
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} // namespace cdc_ft
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#endif // COMMON_LOG_H_
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