Computer data logging is the process of recording events in a computer program, usually with a certain scope, in order to provide an audit trail that can be used to understand the activity of the system and to diagnose problems.

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Common Industry Term For Negative Logging? [closed]

It is one thing to log something that happened in code, a process, or procedure. It is another thing to log something that didn't happen. For example, if your ETL system is supposed to receive a ...
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3answers
441 views

How can I make my logging more useful? [duplicate]

I tend to find that after I build an application, the logs emitted by it become near useless and completely unparseable, and has the problem of being really verbose, while not outputting important ...
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196 views

Filesystems that use logging: If you're writing the data in the log (on disk), and in the actual locations themselves (also on disk) then…?

Aren't you essentially writing the same data twice, to the disk? Doesn't this cause a slowdown of a factor of ~2x? What optimizations can be made to minimize the cost of having to write things twice?
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4answers
153 views

Logging into text file or database?

When should I use database for logging and when text files? I see that web servers and web frameworks (that your app uses internally) usually (always?) log requests and errors into text files by ...
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2answers
360 views

Is it still a good practice to log parameters and returns?

Just a context, I am currently making a base code for a Java Spring Boot Application. I am currently setting up the logging of the application and I stumbled upong this url and found it helpful. ...
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2k views

Logging asynchronously - how should it be done?

In many of the services I work on there are a lot of logging being done. The services are WCF services(mostly) which use the .NET EventLogger class. I'm in the process of improving these services' ...
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97 views

Should we reuse web app logs for user behaviour analytics?

Our web app generates a large amount of logs. These logs include both events regarding background operations in the app (data arrives from the server, ajax failures, inter-component communication, etc....
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1answer
276 views

Is console logging inappropriate for chatty applications?

12 Factor states that applications should log to the console, those console logs should should be unbuffered, and the logs should be redirected to someplace useful (file, database, whatever). But ...
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4answers
172 views

What is your approach to debugging a transient problem [closed]

I am working on a system that controls a label printer and occasionally the label printer will print the same label 2,3,...,10 times. The error is transient, occurring once per 3000-4000 (once a ...
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2answers
210 views

What percentage of code and runtime do you typically allow for testing? [closed]

When I write code, a certain amount of it is just for the purpose of logging, tracing, or otherwise "testing" what the program is doing. This not unit testing; this is not when it is running in "...
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3answers
468 views

how should I handle server error during ajax logout?

I need to write a handler for server error during user logout. What is a common practice? ajax.post({ url: '/auth/logout' }).done(function (response) { switch (response.statusCode) { ...
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1answer
223 views

Should I put logging in common shared libraries? [duplicate]

Should you add logging to common libraries that are used in many applications? For example, if I have a parser that's used in multiple apps, should I add logging inside the parser? My concern is that ...
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654 views

It is bad practice to hard couple logging interface/implementation with business model classes?

Should we avoid using logging in business model classes and try to move logging to service/controller classes? In for example java context, logging in model classes will hard couple the code with ...
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2answers
345 views

Verbose or concise logging [duplicate]

I was wondering how much data should be logged. I know this deeply depends on multiple factors. But it can still be hard to find the golden middle way. Lets say I have an application where people ...
3
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1answer
95 views

An extensible logging architecture for Android?

The end goal is to have a variety of data sets that can all be graphically plotted against eachother. All data should correspond to a date, so that when plotted against each other, they show the ...
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163 views

Log with Application Insights only (NLog vs AI) in Asp MVC

I was going through several blog posts and stackoverflow and programmers and I am still a bit confused. You can install NLog (or some other logging lib) and start logging quite fast and then you can ...
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3answers
244 views

Forcing logger/appender to output line logged at lower than its current level?

Consider the following scenario: I am writing a Dispatcher Servlet that delegates processing to various handlers depending on the request URL; the handler objects having previously registered ...
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1answer
2k views

Is Logger.getLogger(MyClass.class) the best way to initialise log4j loggers?

This Mkyong tutorial suggests intialising loggers this way: @Controller public class WelcomeController { private static final Logger logger = Logger.getLogger(WelcomeController.class); // ...
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1answer
362 views

Logging in a latency sensitive system

Requirements: My application is latency sensitive. Millisecond level responsiveness matters. Not all the time, but when it acts, it needs to be fast. My application needs to log information about ...
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2answers
236 views

Exception messages and event logging - which tense to use? [closed]

Do you have best practices regarding to which tense to use in message when you're coding exception-throwing or message-logging code: "Could not acquire connection from DataSource" versus "Can not ...
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2answers
235 views

Adding centralized logging mechanism to Project (Best Practice)

I want to add a logging mechanism to my project but I am afraid to have logging code spread all over the place. I thus had the idea of having only one class Logger responsible for writing relevant ...
2
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1answer
2k views

How to design a log() method that can easily be accessed from the outside of the Console class?

Recently my team has programmed a custom developer console in a video game which can easily be hidden or displayed, because it's more comfortable and less of a hassle. The Console class contains a ...
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2answers
393 views

When is it okay to log filename/line information for errors?

We have a closed-source commercial C++ application. Some of our logged error messages are in plain English like "ERROR: could not read file 'foo'". While others use a macro to print filename/line ...
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3answers
169 views

Logging an audit trail (Java application)

I'm creating a Java (Spring Boot) application for creating Entities. I've got my @Controller for getting the data from a web front end, I've got my @Service for processing the data, and I've got my @...
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2answers
202 views

Can I alter the code while adding logging?

When I add logging (e.g. log4j2 in Java) to existing code, is it ok (good practice), to alter the code? Consider the following example: //if process returned 0 return true return (returnCode == ...
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2answers
158 views

Where should tests' log files go?

My application has a rather non-trivial, yet standard, log configuration. It includes a console appender and a rolling size-based file appender. When I'm running the tests, thru the IDE or with maven,...
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1k views

Opinions on logging in multiprocess applications

We have written an application that spawns at least 9 parallel processes. All processes generate a lot of logging information. Currently we are using Python’s QueueHandler to consolidate all logs ...
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3answers
90 views

Allowing the user to specify the location of a logfile

I'm working on an application, and adding logging, but now I'm stuck. I want to allow (not force!) the user to set the location of the logfile. Basically, my problem is: logger initialization ...
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2answers
1k views

Centralized and decentralized logging mechanisms

I've worked different kind of applications both having centralized and decentralized logging mechanisms. I feel centralized logging mechanism is good to see the proper flow of code and timing of ...
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1answer
25 views

Handling and reporting errors consistently

Errors can come from many different sources - third-party services, libraries, environment, etc. When an error prevents a user from performing their desired action, these diverse errors should be ...
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1answer
141 views

Module level logger function

I've recently been assigned to a new project because I'm one of the only developers at my company who has used Python extensively in the past. My first task was to clean up the code base and make it ...
2
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1answer
416 views

Design patterns to avoiding breaking the SRP while performing heavy data logging

A class that performs both computations and data logging* seems to have at least two responsibilities. Given a system for which the specifications require heavy data logging, what kind of design ...
2
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1answer
60 views

log method calls per object

How to log method calls on a per object basis for a particular class? I.e. after instanciating a = myClass() I somehow want to keep a log for what methods have been called on a like a.reverse() a....
2
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2answers
395 views

Event based logging. Is it a good idea and is it ok to pass a handle to a “logged” object?

Hi I have fairly complex program that is doing computations in a quite large loop. I want to log some basic statistic about the run to be able to analyze its performance over time and vs loop number. ...
2
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1answer
745 views

tail-like view on HTML logfiles

I'm working on an application that creates HTML log files. I'm tired of having to manually reload and scroll to the bottom in the browser to see the latest entries. A solution that does not really ...
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1answer
299 views

Logging RestTemplate's responses

I want to log responses using Spring's RestTemplate. At first I thought I should do it using a ClientHttpRequestInterceptor, but since every set of requests should be logged to a different file, I ...
2
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1answer
506 views

What is the best way to track / record the current programming project you work on? [duplicate]

I have been in this problem for long time and I want to know how it's done in real / big companies project? Suppose I have the project to build a website. Now I divide the project into sub tasks and ...
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2answers
853 views

Logging events for reporting purposes

Are there any design patterns or best practices around logging events for use in reporting and BI systems. For example in a system which manages orders from a website, it would be beneficial if a ...
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2answers
117 views

Does it make sense to internationalize logs?

I'm working on converting the logging API used by a web application from log4j to slf4j, and noticed that the interface used to abstract over the log4j implementation supports internationalization; I ...
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2answers
483 views

Adding Logging to a pre-existing Program

I have a game that I have been writing in java as a hobby for a number of years. I have very sparse logging, just some simple output when something goes really wrong. It's about 25,000 lines of code. ...
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3answers
145 views

Log within try-catch or after? [closed]

Should one log success of an operation within a try-catch-block, or after it? Example: try do x log('successful') catch log('fail') end or is this better: try do x catch log('...
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3answers
424 views

Exception when logging exception: is it correct to ignore them?

My question is specific to php, but i think it can be useful in other languages. I log into a table all the exception a code can throw: try{ //Some code } catch (Exception $e) { $log = new ...
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1answer
88 views

Is there any reason not to include issue numbers in debug logs?

I was going through the answers to this question: What information must never appear in logs? And noticed that nobody mentioned this particular attribute. It's something I find useful- whenever any ...
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2answers
1k views

log4cxx: is it a stable option to include as part of distributed library? [closed]

We are porting our Java API library to C++. (Our target platforms are Linux and Windows.) Since we have minimal C++ experience, the learning curve has been pretty steep, but overall we have been able ...
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3answers
102 views

Event logging: record a whole message, or a list of properties and generate?

I've written a simple event logging system, which I write to with a function similar to: void IIncidentLogic.ReportIncident( string code, string noun, string hostname, DateTimeOffset ...
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2answers
160 views

Logging function names on systems with few (memory and space) resources

Our logging module has a buffer that often gets full and we are searching for a solution to shorten our logs, without making any compormise in performance. The code is written in C++ and currently we ...
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3answers
106 views

Logging instance information in Exceptions

During development on a large existing codebase I've started to capture variable values in my Exception logging. For example: public int Foo(int a, int b) { int returnInt; try{ returnInt =...
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1answer
493 views

How to unit test a class which is just an adapter that logs input and output to a third-party library?

I have the following (in C#, but the question could also apply to Java): public interface ILibraryAdapter { string Property1 { get; } string Method1(string param1); ... } public class ...
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102 views

Are there any arguments for using a local logger variable

PMD Rule LoggerIsNotStaticFinal: In most cases, the Logger reference can be declared as static and final. I seem to remember some arguments for using local variables for logging, but cannot ...
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153 views

Better way of handling pre conditions and logging

1. Imagine you have the following: void Foo::doFoo() { if (!isConditionValid()) { log("doFoo not possible because condition is not valid"); return; } if (!...