Implementation of logging system in C++17 (2023)

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  • Programming/Internet
  • thread starterRitty
  • start dateApril 13, 2023
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  • April 13, 2023
  • #1

I may have done a bit of programming and created a very simple logging system for my personal project. While it works well so far, I'd love any suggestions on how to improve its behavior and what I can do to make it more useful in general.

Key questions include:

  1. Is my code thread safe? If not, how can I make it thread safe?

  2. Is there a way to make the interface more user-friendly? Now#definitionIt feels a bit strange.

  3. Is there a way to avoid using the globalsingle_ptr?

  4. Should I make this a header only library? Are there any advantages to this?



#pragma once/* Use this header by including it in every file you need and start a new record in your main function. Logger::startLog("Log.txt"); Use different error levels by naming them and simply passing the information and what you want to print. Logger::log(ERROR, "Something went wrong.");*/// For unique pointers. #include// Tok datoteke。#include// Array class for name and passed parameters. #include#define FATAL Logger::Level::Fatal#define ERROR Logger::Level::Error#define WARNING Logger::Level::Warning#define INFO Logger::Level::Info#define DEBUG Logger::Level::Debugnamespace Logger { // Enumeration of severity levels. enum classLevel {fatal, error, warning, info, debug}; // Initialize the record. void startLog(const std::string& filepath); // Message record. void log(Level s, const std::string& msg); // record class. class Log { public: Log(const std::string& filepath); void addLog(Level s, const std::string& msg); ~log(); private:// Logging file. std::ofstream m_logfile; std::string levels[5] = {"fatal", "error", "warning", "info", "debug"}; };}



#include "Log.hpp"namespace Logger { // Objeto de global registro. std::unique_ptrg_log; // Inicializar nuestro objeto de registro. void startLog(const std::string&filepath) { g_log = std::make_unique(file path); Logger::log(Level::Info, "Start logging system."); } //Registration method. void log(Level s, const std::string& msg) { g_log->addLog(s, msg); } // Create our global registry object. Log::Log(const std::string& filepath) : m_logfile{} {; } // Adding a message to our log. void Log::addLog(Level s, const std::string& msg) { if (m_logfile.is_open()) { m_logfile << levels[static_cast(s)] << ": " << msg << std :: end; } } Log::~Log() { addLog(Level::Info, "Logging system stopped."); m_logfile.close(); }}
(Video) Minimal Structured Logging for Autonomous Vehicles - Robert Keelan - CppCon 2019

unanswered thread

Is it possible to embed $\mathrm{Sp}_{2m}(p)\leqslant S_{p^m-1}$?

  • usuario488802
  • mathematics
  • Answer: 0

Is it possible to make the following installations?

$\mathrm{Sp}_{2m}(p)\leqslant S_{p^m-1}$ where $S_{p^m-1}$ is a symmetry group and $p$ is a prime number. I see that when $p=3$ and $m=3$, the order of the former divides the order of the latter.

Thank you.

None The phone's screen size (2) is not confirmed, it will get 3 years of Android updates

  • - Latest Articles
  • android
  • Answer: 0

None The phone's screen size (2) is not confirmed, it will get 3 years of Android updates

Implementation of logging system in C++17 (1)

sugarJune 1, 2023

A few weeks ago, Nothing founder Carl Pei confirmed that the Phone (2), arriving in July,It will be powered by Snapdragon 8+ Gen 1 SoC.Recently Pei stated that Nothing Phone (2)It includes a 4,700 mAh battery, greater than 200 mAhphone (1)Cell. Now the company has revealed the phone's screen size (2).

The screen of the Nothing Phone (2) will be 0.15 inches larger than the screen of the Phone (1), with a diagonal of 6.7 inches. While Nothing hasn't revealed its resolution, it's likely to be FullHD+ like the phone's panel (1).

Implementation of logging system in C++17 (2)
Nothing Phone Design Trailer (2)

In addition, nothing says that the phone (2) has a carbon footprint of 53.45 kg, which is more than 5 kg less than the phone (1). The young brand also says that the phone (2) uses 3 times more bio-based or recycled components than the phone (1) and that the retail packaging is plastic-free.

(Video) How databases scale writes: The power of the log ✍️🗒️

Implementation of logging system in C++17 (3)

Also, to make the phone (2) more sustainable, Nothing commits to three years of Android updates and four years of security updates for smartphones powered by Snapdragon 8+ Gen 1.

canRead the entire Twitter thread hereMore details.

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reader comments


  • anonymous
  • iJ3
  • 11 minutes ago

no no no why? 6.1 inches is enough, why are the big manufacturers pushing mobile phones with large screens (6.7 inches or more)? If you say it's all about battery life, look no further than the Zenfone 9...


Screen 6.7 is an exaggeration


  • anonymous
  • 15 minutes ago

I don't mind using recycled materials. I want my phone to last

Total reader comments:6


Beginner's problem: adding a flag affects the triode circuit

  • el zamu
  • physical
  • Answer: 0

Thanks to the help of this community, I was able to build the following transistor circuit (detailshere, many thanks @mathkeepsmebusy):

Implementation of logging system in C++17 (4)

The circuit works and the LED lights up according to the temperature of the thermistor.

Next I need to add an indicator to show the temperature of the thermistor. i useVDO brodski instrumenti, here is the wiring diagram for reference:

Implementation of logging system in C++17 (5)

My thermistor has one terminal with the body grounded as shown in the "standard ground" diagram in the picture.

I tested the gauge by connecting the signal wire to ground through a resistor and the gauge showed the correct temperature reading. However, when I connect the signal wire to the upper circuit at test point \$TP\$, the circuit stops working and the meter reads incorrectly compared to the resistance indicated by the thermistor.

(Video) Logging in Python || Learn Python Programming (Computer Science)

My understanding is that the meter is an active component whose signal wire interferes with the voltage you connect to the base of the first transistor.

My question is how should I "isolate" the meter from the circuit (and vice versa) so that the meter reads correctly and the circuit turns on the LED correctly?

Thanks in advance!

PCIe to Thunderbolt connection issues

  • Shannon
  • physical
  • Answer: 0

I have a custom board (using FPGA with PCIe IP) with a PCIe (gen2 4 lane) connection, I use an external device that connects PCIe to NVMe, then I use NVMe to connect to the Thunderbolt module. As follows:

Implementation of logging system in C++17 (6)
series 1

The problem I'm having is that custom board #1 and the setup driver for custom board #1 are recognized in device manager, and the same custom board #1 is also recognized as a PCIe connection directly to the PC as configuration #2. Testing custom board #2 of configuration #1, we see that the custom board is not recognized in device manager, but when testing configuration #2, the personalized board is recognized.

Implementation of logging system in C++17 (7)
Set #2

Why is one board recognized as directly connected to the computer but not working with the Thunderbolt configuration, while the other board works with both configurations?

Any suggestion is appreciated.

  • Orion
  • physical
  • Answer: 0

I am setting up an EMC test device and have a spectrum analyzer (SA): Rohde and Schwarz FPL 1003 spectrum analyzer. I'm trying to do some preliminary testing to make sure what I'm seeing in the parser is correct.

(Video) Login System with Registration & Filestoring & Filesystem C++ Tutorial Visual Studio

To do this, I send a sine wave of a certain frequency (100 kHz) and amplitude (2 V p-p) to the SA from the function generator and control the output.

Output: Fundamental (100 kHz) and higher frequencies match the spectrum seen in SA. However, the size seen is quite different.

The function generator now has 3 "Load Settings" options: 1. 50 ohms 2. High Z and 3. Load

In high impedance configuration: i/p: 2Vp-p, ie 0 to 1 Vpk || o/p (in SA): 353 mV

In 50 ohm configuration: i/p: same || o/p (in SA): 671 mV

In load setting: i/p: same || o/p (in SA): 671 mV

Am I missing something to not get the correct 1V output on the spectrum analyzer?

How far does 220VAC shock you?

  • dribling bite
  • physical
  • Answer: 0

As a result, our gardens and front yards become very waterlogged after heavy rains. My brother bought an AC submersible pump in the market, small things (it sits in the palm of my hand), with low flow (Possibly 4-6 liters per minute), not sophisticated (Cheap, when you buy something and ask the owner about the "guarantee", he just looks at you as if that word hurts him.) But the wire that came with it was pretty short, so we connected a longer wire and put electrical tape on it. Now I was shocked when I discovered this device and saw that the knuckles were submerged in water and we often got into it without getting shocked. What's going on here? Do we insulate it so well that not a single drop of water touches the bare metal wire, or is there something else to be thankful for?

Investing in energy through transmission lines

  • toby urban
  • physical
  • Answer: 0

I know from my undergraduate courses that real power flows from the bus with the higher power angle \$\delta\$ to the bus with the lower power angle. If I want to reverse the direction of the power flow, I now have to increase the power angle of the bus with the lower power angle.

How would you achieve this reversal of energy flow? How to increase the power angle on the bus?


How do you implement a logger? ›

Logging Best Practices: The 13 You Should Know
  1. Don't Write Logs by Yourself (AKA Don't Reinvent the Wheel) ...
  2. Log at the Proper Level. ...
  3. Employ the Proper Log Category. ...
  4. Write Meaningful Log Messages. ...
  5. Write Log Messages in English. ...
  6. Add Context to Your Log Messages. ...
  7. Log in Machine Parseable Format.
Oct 15, 2019

Does C++ have a logger? ›

There are many C++ logging frameworks out there to choose from.

How do you use logger in CPP? ›

Logging using interfaces provided by the Logger class

void debug(const char* text) throw(); void debug(std::string& text) throw(); void debug(std::ostringstream& stream) throw(); One simply needs to pass the message to the function that is desired to be logged.

What is logging in CPP? ›

The log() function in C++ returns the natural logarithm (base-e logarithm) of the argument. This function is defined in <cmath> header file. [Mathematics] logex = log(x) [In C++ Programming]

How to implement logger in Web API? ›

The information will log into target files.
  1. using NLog;
  2. using System;
  3. using System.Web.Mvc;
  4. namespace NLogTest.Controllers {
  5. public class HomeController: Controller {
  6. private static Logger logger = LogManager.GetCurrentClassLogger();
  7. public ActionResult Index() {
  8. ViewBag.Title = "Home Page";
Nov 5, 2020

Where can I implement C++? ›

C++ is also used in writing database management software. The two most popular databases MySQL and Postgres are written in C++.

Is there a tree library in C++? ›

One of the most common data structures in computer science and programming is a tree. Trees are an abstract data type for all kinds of hierarchical data like file systems, parse trees, domain object models (HTML, XML), binary search trees, and many more. Yet, there is no tree type in the C++ standard library.

Can a hacker use C++? ›

Is C++ used for hacking? C++ is one of the go-to C languages for hackers because it helps them gain low-level access to hardware and processes.

How do you add a logger to code? ›

Create new Logger

You have to use Logger. getLogger() method. The getLogger() method identifies the name of the Logger and takes string as a parameter. So, if a Logger pre-exists then, that Logger is returned, else a new Logger is created.

What is the use of logger command? ›

The logger command provides an interface to the syslog subroutine, which writes entries to the system log. A Message variable can be specified on the command line, which is logged immediately, or a File variable is read and each line of the File variable is logged.

How does logger work? ›

A logger works in the lumber industry, cutting down trees and loading them for transportation. Typical job duties involve cutting, skidding, and pre-processing the logs. The logs are then processed into boards, paper, and other valuable materials. Most loggers work in teams of two to safely fell timber.

What are the different types of logging in programming? ›

The most common logging levels include FATAL, ERROR, WARN, INFO, DEBUG, TRACE, ALL, and OFF.

What is process logging? ›

Network Manager can create log and trace files for its processes. Log files provide information about important process events, such as changes in state, warnings, or errors, in a standard format that is compatible with IBM's Common Base Event (CBE) format.

What is logger in REST API? ›

A logger is an object in the client application that submits log messages to the backend. Every logger is identified by a unique name. The name should be a meaningful indicator of the origin of the messages delivered to the server by the logger.

How to create logs in API? ›

How to Create Logs to Debug API Issues
  1. Name of the class and method being accessed.
  2. Custom messages used in the code to specify the reason why the message was logged.
  3. All argument values sent to the method that logged the message.

Which .NET function would you use to get a logger? ›

ILogger : This interface provides the Log() method, which can be used to write a log message.

What are 4 types of logging? ›

Types of logging
  • Circular logging. Use circular logging if all you want is restart recovery, using the log to roll back transactions that were in progress when the system stopped. ...
  • Linear logging. ...
  • Active log. ...
  • Inactive log. ...
  • Secondary log files.
Apr 30, 2020

What are the two methods of logging? ›

Logging is generally categorized into two categories: selective and clear-cutting. Selective logging is selective because loggers choose only wood that is highly valued, such as mahogany. Clear-cutting is not selective.

What are implementations in C++? ›

• Implementation is the set of private data structures and the. code for that implements the methods that act on the data. • The conceptual power of this separation is that code. outside of a class does not need to know anything about how data is structured in the class, only how to call the class' methods.

What is the average salary of a C++ programmer? ›


What is the difference between interface and implementation in C++? ›

An interface is an empty shell, there are only the signatures of the methods, which implies that the methods do not have a body. The interface can't do anything. It's just a pattern. The implementation is the actual substance behind the idea, the actual definition of how the interface will do what we expect it to.

What are the 3 main libraries of C++? ›

The Containers, Iterators and Algorithms Libraries (the Standard Template Library) The Standard Template Library (STL) is a facility for the management and manipulation of collections of objects.

What libraries should I learn in C++? ›

Top 13 libraries for C++
  • The C++ Standard Library. When you mention The C++ standard library, of course you will immediately think about STL, right? ...
  • Boost. The next library on the list will be Boost. ...
  • POCO. Source: ...
  • OpenSSL. ...
  • FFmpeg. ...
  • SQLite. ...
  • Dear ImGui. ...
  • JSON for Modern C++
Mar 29, 2022

What library is free in C++? ›

The free() function is used in C++ to de-allocate the memory dynamically. It is basically a library function used in C++, and it is defined in stdlib. h header file. This library function is used when the pointers either pointing to the memory allocated using malloc() function or Null pointer.

What are the 7 types of hackers? ›

  • 1) White Hat Hackers.
  • 2) Black Hat Hackers.
  • 3) Gray Hat Hackers.
  • 4) Script Kiddies.
  • 5) Green Hat Hackers.
  • 6) Blue Hat Hackers.
  • 7) Red Hat Hackers.
  • 8) State/Nation Sponsored Hackers.

What is the best language for cyber security? ›

The top cybersecurity languages include Java, JavaScript, Python, SQL, PHP, PowerShell, and C. Depending on your career path, you may find other languages useful as well.

Can C++ damage my computer? ›

Don't worry, you won't destroy your computer with any C++ script you write.

How do I create a custom logger? ›

Steps for creating a custom logger
  1. logger = logging.getLogger('demologger') logger.setLevel(logging.INFO)
  2. For Stream Handler, consoleHandler = logging.StreamHandler() ...
  3. For File Handler, ...
  4. formatter = logging.Formatter('%(asctime)s – %(name)s – %(levelname)s: ...
  5. logger.addHandler(fileHandler) ...
  6. For example,

Which classes will allow you to implement the logging functionality? ›

The java. util. logging package provides the Logger class to log application messages.

What is logging coding? ›

In computing, logging is the act of keeping a log of events that occur in a computer system, such as problems, errors or just information on current operations. These events may occur in the operating system or in other software.

What is the command used to create a logging message? ›

Just type logger <message> on the command line and your message will be added to the end of the /var/log/syslog file.

Why is logger better than system out? ›

As we've seen in the previous section, logger frameworks allow writing the logs to a file. Similarly, they also provide appenders to send logs to other systems and applications. This makes it possible to send logs to a Kafka Stream or an Elasticsearch database using Log4J appenders rather than using System. out.

What is a logger tool? ›

The downhole hardware needed to make a log. The term is often shortened to simply "tool." Measurements-while-drilling (MWD) logging tools, in some cases known as logging while drilling (LWD) tools, are drill collars into which the necessary sensors and electronics have been built.

What is an example of data logging? ›

Applications of data logging include: Unattended weather station recording (such as wind speed / direction, temperature, relative humidity, solar radiation). Unattended hydrographic recording (such as water level, water depth, water flow, water pH, water conductivity). Unattended soil moisture level recording.

Who uses data logging? ›

Data Loggers are used in geotechnical monitoring and instrumentation on a large scale because they automatically collect real-time data from the sensors and display it over the mobile device. One can leave the data loggers unattended and can still get the complete data anytime they wish to.

What is an example of a data logger? ›

When a patient has had a major operation or is very ill, they may be in the Intensive Care Unit (ICU). While they are in the ICU, they will be constantly monitored to make sure that their condition is stable. A heart monitor will take readings of their heart rate and pattern of beats.

What is the best method of logging? ›

8 Log Management Best Practices
  • Implement Structured Logging.
  • Build Meaning and Context into Log Messages.
  • Avoid Logging Non-essential or Sensitive Data.
  • Capture Logs from Diverse Sources.
  • Aggregate and Centralize Your Log Data.
  • Index Logs for Querying and Analytics.
  • Configure Real-Time Log Monitoring and Alerts.
Nov 26, 2021

What are the five levels of logging? ›

What are the standard log levels?
  • Emergency. Emergency logs are given the numerical value "0". ...
  • Alert. ...
  • Critical. ...
  • Error. ...
  • Warning. ...
  • Notice. ...
  • Informational. ...
  • Debug.

What are steps of logging on in computer? ›

Login Procedure (Starting the System)
  • Turn on the computer and monitor power. If the monitor power light is not on, turn on the monitor power switch, then press the power button on the computer to turn it on. ...
  • Enter your User ID (username) and password. Enter your user ID and password, click Log In and press the Enter key.

Which is a logging file system? ›

A log-structured filesystem is a file system in which data and metadata are written sequentially to a circular buffer, called a log. The design was first proposed in 1988 by John K.

What is logging in application? ›

What Is Application Logging? Put simply, an application log is a file that contains information about events that have occurred within a software application. These events are logged out by the application and written to the file. They can include errors and warnings as well as informational events.

Why is logging important? ›

Provides necessary materials – Logging is a main source of timber which is used for a number of human needs such as providing construction materials, flooring wood, furniture, fuel for industries and homes, sports goods and other kinds of commodities.

How to implement logger in Java? ›

The process of creating a new Logger in Java is quite simple. You have to use Logger. getLogger() method. The getLogger() method identifies the name of the Logger and takes string as a parameter.

How to implement logger in C#? ›

In this article, we will share seven best practices to take your C# logging to the next level.
  1. Don't Reinvent the Wheel. ...
  2. Write Logs to Files, Not the Console. ...
  3. Use A Third-Party Logging Library. ...
  4. Make Use of Logging Levels. ...
  5. Control Log Messages With Filters. ...
  6. Log Contextual and Diagnostic Data. ...
  7. Use Structured Logging.
Apr 23, 2019

How to implement log4j? ›

How to Use Log4j in Selenium
  1. Write an automation script, such as the one in the example below. ...
  2. After creating the script, create a log4j. ...
  3. Import log4j dependencies like Logger, PropertyConfigurator, and add them to the script along with the logger class.
  4. Add the messages that will be displayed in the log file.
Feb 12, 2023

What are the methods in logger? ›

Logging Methods
#Methods and Description
1public void debug(Object message) It prints messages with the level Level.DEBUG.
2public void error(Object message) It prints messages with the level Level.ERROR.
3public void fatal(Object message) It prints messages with the level Level.FATAL.
3 more rows

How does logger works? ›

Loggers are responsible for capturing events (called LogRecords) and passing them to the appropriate Appender. Appenders (also called Handlers in some logging frameworks) are responsible for recording log events to a destination. Appenders use Layouts to format events before sending them to an output.

What is logging in programming? ›

In computing, logging is the act of keeping a log of events that occur in a computer system, such as problems, errors or just information on current operations. These events may occur in the operating system or in other software. A message or log entry is recorded for each such event.

How to use logger in interface in java? ›

Example of Custom Java Logging Handler
  1. import java.util.logging.LogRecord;
  2. import java.util.logging.StreamHandler;
  3. public class MyHandler extends StreamHandler.
  4. {
  5. @Override.
  6. public void publish(LogRecord record)
  7. {
  8. //add own logic to publish.
Oct 29, 2020

Which logging method is best for spring boot? ›

Spring Boot uses Apache Commons logging for all internal logging. Spring Boot's default configurations provides a support for the use of Java Util Logging, Log4j2, and Logback. Using these, we can configure the console logging as well as file logging.

What is logging framework in C#? ›

Logging levels are used to filter log data. A typical production environment may be configured to log only ERROR and FATAL levels. If problems arise, the logging level can be increased to include DEBUG and WARN events. The additional context provided by these logs can help diagnose failures.

How to implement logger in MVC? ›

We have 4 logging libraries which we are going see in details how to implement them with ASP.NET MVC application.
  1. Log4net (Logging in text file + logging in SQL database)
  2. Nlog (Logging in text file + logging in SQL database)
  3. Serilog (Logging in text file + logging in SQL database)
  4. Elmah (logging in SQL database)
Feb 22, 2019

How to check log4j is used in code? ›

Check the log4j jar file: You can also check the version of log4j by looking at the log4j jar file that is included in your application's classpath. The version information should be included in the file name, such as log4j-1.2. 17. jar, indicating that you are using Log4j version 1.2.

How to write logs in a file using log4j? ›

Follow the below steps:
  1. 1) Create a Java Project.
  2. 2) Add the log4j jar File.
  3. 3) Create a Java File.
  4. 4) Create a File.
  5. 5) Add the file to the Classpath.
  6. 6) Compile and Run the Project.
  7. Output on the Console:
  8. Output:

What is log4j used for? ›

Log4j is used by developers to keep track of what happens in their software applications or online services. It's basically a huge journal of the activity of a system or application. This activity is called 'logging' and it's used by developers to keep an eye out for problems for users.


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