mirror of
https://github.com/facebook/rocksdb.git
synced 2024-11-27 11:43:49 +00:00
cdaf44f9ae
Summary: Now the file summary is too small for printing. Enlarge it. To enable it, allow to pass a size to log buffer. Test Plan: Add a unit test. make all check Reviewers: ljin, yhchiang Reviewed By: yhchiang Subscribers: leveldb Differential Revision: https://reviews.facebook.net/D21723
55 lines
1.7 KiB
C++
55 lines
1.7 KiB
C++
// Copyright (c) 2014, Facebook, Inc. All rights reserved.
|
|
// This source code is licensed under the BSD-style license found in the
|
|
// LICENSE file in the root directory of this source tree. An additional grant
|
|
// of patent rights can be found in the PATENTS file in the same directory.
|
|
|
|
#pragma once
|
|
|
|
#include "rocksdb/env.h"
|
|
#include "util/arena.h"
|
|
#include "util/autovector.h"
|
|
#include <ctime>
|
|
|
|
namespace rocksdb {
|
|
|
|
class Logger;
|
|
|
|
// A class to buffer info log entries and flush them in the end.
|
|
class LogBuffer {
|
|
public:
|
|
// log_level: the log level for all the logs
|
|
// info_log: logger to write the logs to
|
|
LogBuffer(const InfoLogLevel log_level, Logger* info_log);
|
|
|
|
// Add a log entry to the buffer. Use default max_log_size.
|
|
// max_log_size indicates maximize log size, including some metadata.
|
|
void AddLogToBuffer(size_t max_log_size, const char* format, va_list ap);
|
|
|
|
size_t IsEmpty() const { return logs_.empty(); }
|
|
|
|
// Flush all buffered log to the info log.
|
|
void FlushBufferToLog();
|
|
|
|
private:
|
|
// One log entry with its timestamp
|
|
struct BufferedLog {
|
|
struct timeval now_tv; // Timestamp of the log
|
|
char message[1]; // Beginning of log message
|
|
};
|
|
|
|
const InfoLogLevel log_level_;
|
|
Logger* info_log_;
|
|
Arena arena_;
|
|
autovector<BufferedLog*> logs_;
|
|
};
|
|
|
|
// Add log to the LogBuffer for a delayed info logging. It can be used when
|
|
// we want to add some logs inside a mutex.
|
|
// max_log_size indicates maximize log size, including some metadata.
|
|
extern void LogToBuffer(LogBuffer* log_buffer, size_t max_log_size,
|
|
const char* format, ...);
|
|
// Same as previous function, but with default max log size.
|
|
extern void LogToBuffer(LogBuffer* log_buffer, const char* format, ...);
|
|
|
|
} // namespace rocksdb
|