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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Should I try to read user input for logger data?

Our logger data has gotten a bit out of hand, so I am trying to find ways to trim out unnecessary log information. What I've found is that the programmer who implemented the logs (no longer working ...
1
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0answers
20 views

A way to trace each sqlite query

I've got big and hairy app with sqlite via dbi (from .c) as a backend - plenty of select/insert/update/delete queries. From looking through documentation I did not found a way to log all the queries ...
15
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6answers
1k views

Why does the TRACE level exists, and when should I use it rather than DEBUG?

In Log4J, Slf4J and a couple other logging frameworks in Java, you have two "developper" level for logging. DEBUG TRACE I understand what DEBUG do, because the explanation is clear. The ...
0
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1answer
51 views

Logging private data

In general, I write a debug log whenever one of my functions is entered, including the parameters. For instance: function execute_query($query, $conn_string) { ...
11
votes
3answers
600 views

Why create a Logger object instead of using static logging methods across an application?

Taking an example of a simple Ruby on Rails application. It creates a Logger object during application load process: # in environment.rb config.logger = Logger.new(<STDOUT | file | whatever>) ...
1
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0answers
87 views

Approach for polyglot logging

I'm building a desktop app with a Java front-end and very performance critical Fortran libraries. We've recently started pushing more of our code out of Java and into Fortran (see below) Soon we will ...
2
votes
1answer
35 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() ...
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2answers
71 views

Should client side have a log? [closed]

The client side of my application is written in VB.Net, it accesses a java server. Server logs every request that was made by client, client shows every exception to the user (with an option to send ...
2
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1answer
33 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 ...
1
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3answers
74 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 ...
0
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1answer
78 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); // ...
4
votes
2answers
84 views

Strategies to analyze collected exceptions

We want to add error feedback to our application. I had a look at existing solutions (e.g. raygun.io), but these work "in the cloud", which is a no-go for us: most installations of our application ...
3
votes
2answers
140 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. ...
1
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0answers
105 views

How to to log clicks for a Pay-Per-Click software?

Let say you have a Website with advertising, and each time a user clicks on it, you want to charge an advertiser the amount he bids (basically, a pay-per-click system, like Adswords, with a different ...
0
votes
0answers
54 views

Is Python Logging in a WSGI application a best practice a production environment?

I am trying to log my webpage access to a database. It is a requirement. It seems to be a difficult thing to do outside of Windows IIS, and I do not wish to use Python with IIS. My options seem to ...
4
votes
3answers
718 views

Write progress from a long running process

We have some long running processes which could run for as long as an hour up to 6 hours. Some of the processes are started by hand and the user wants to see what the progress of the process is. ...
14
votes
6answers
3k views

Is logging next to an implementation a SRP violation?

When thinking of agile software development and all the principles (SRP, OCP, ...) I ask myself how to treat logging. Is logging next to an implementation a SRP violation? I would say yes because ...
2
votes
1answer
380 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 ...
8
votes
2answers
642 views

How should I handle logger failures?

In several of our company's applications, we use a custom logger. It's fairly robust, though we may replace it with something like NLog in the future. One of the logger's tasks is to log any ...
2
votes
3answers
993 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 ...
1
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1answer
43 views

Loggers - Functional, non-functional or layered?

We use different loggers to break up and apply specific rules to different kinds of log data. We typically specify which logger to be used with something like this: var logger = ...
1
vote
2answers
155 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. ...
1
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2answers
110 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 ...
3
votes
5answers
246 views

Exception handling and 3rd party library

I'm currently having an issue with a 3rd party control library provider. They have an exception occulting culture that gets in the way of my general fail-fast approach when developing software. An ...
0
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3answers
357 views

Convention for logging within nested try catch blocks

I've looked at this question but it doesn't really help solve my dilemma. System 1 calls system 2 within a try catch, the method in system 2 has it's own try catch, which sadly handles an exception ...
0
votes
2answers
41 views

How do we sequence logs from different services in a system?

So, if I am designing a system as a set of different roles (client, app-server, backend services 1 to n). Each of these roles will have their own logging mechanism. I can aggregate all the logs at one ...
2
votes
2answers
110 views

Exception messages and event logging - which tense to use?

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 ...
0
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2answers
155 views

Printing to out vs Logging, given the nature of this app?

I'm writing a command line application in Java. That app will scan a list of remote resources, do several attempts to access those resources, report failed attempts, and if succesfully accesed, ...
0
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1answer
131 views

Tracing and Logging per item instead of per application

I'm building a service in .NET that process "things" in the background and I'd like to trace the execution of these things per item, not per application. Most logging frameworks (I'm familiar with ...
7
votes
1answer
661 views

Log to file or to database table?

I'm developing a web application which uses MS SQL for various data: including users, user accounts, user licenses, license prices, invoices. I need to log users' real-time usage of the system, and ...
3
votes
1answer
122 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 ...
-1
votes
1answer
81 views

“Grep” that highlights instead of filter [closed]

I was wondering if there is a program in the common unix toolset such as grep that instead of filtering the lines that contain a string, simply outputs the same input but highlighting or coloring the ...
3
votes
1answer
134 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 ...
0
votes
1answer
111 views

What possible things to log in mvc webapp [closed]

I'm about to learn to handle logging in my c# asp.net mvc app and are going to store my log in a noSQL-db. How to handle the logging is done. The thing is I'm having a hard time to figure out possible ...
5
votes
4answers
5k views

Which design pattern is more suitable for logging?

I should log some events in a program but as far as I know it would be better to keep the logging code outside the program because it is not about the real functionality of the program. So may you ...
0
votes
3answers
154 views

Store an object's name in the object or externally?

I'm in the process of building an application which needs extensive logging of points in time at which certain events happen. For example when it renders a sequence of different shapes to the screen ...
0
votes
3answers
179 views

Alternative to printing debug information to stdout\stderr [duplicate]

I currently have a long running application on an embedded Linux environment and all debug messages are currently being outputted to stdout using printf. This isn't ideal for special users who ...
0
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0answers
73 views

Design Logging (or: notify) architecture in application [duplicate]

Update: I edited my question to make my intentions more clear. So I think this question about logging will be different to the often asked questions. First things first: I have an application that ...
-3
votes
1answer
121 views

Distinct Log and Trace for each object in .NET [closed]

I am dealing with very complex objects in .NET (in my case a finite element model that can consist of thousands of other objects say a Model instance have a large list of Element instance). I would ...
1
vote
3answers
85 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 ...
0
votes
2answers
235 views

Logging Exception in multi-tier application

I'm building a multi-tier enterprise application using Spring. I have different layers: Controller, Business and Provider. Within the application I've built a custom error handling mini-framework that ...
1
vote
3answers
829 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' ...
0
votes
1answer
102 views

Why do a lot of logging frameworks provide individual methods instead of a enum 'level'?

I see some of the more preferred logging frameworks like log4j, log4net etc all use 'trace, debug' etc methods. Why do they use these instead of methods that take something like a enum level?
1
vote
3answers
135 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 ...
3
votes
4answers
139 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 ...
19
votes
4answers
14k views

What is the correct way to handle debug output in Java?

As my current Java projects grow bigger and bigger, I feel a likewise growing need to insert debug output in several points of my code. To enable or disable this feature appropriately, depending on ...
0
votes
2answers
2k views

Way for java program to read file from when it was stopped

I am working on an application that reads a log file, looks for a specific string, sends alert emails and saves data from the file into a database. The reading functionality is working well, but I am ...
8
votes
6answers
2k views

Rules and advice for logging?

In my organization we've put together some rules / guildelines about logging that I would like to know if you can add to or comment. We use Java but you may comment in general about loggin - rules ...
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votes
1answer
1k views

What is the best way to get a method name in runtime?

Here is a little background of my problem: I implemented a singleton logger class which is being called from several projects. I want to log the name of the class as well as the name of the method ...
1
vote
2answers
121 views

Strategy to store/average logs of pings

I'm developing a site to monitor web services. The most basic type of check is sending a ping, storing the response time in a CheckLog object. By default, PingCheck objects are triggered every minute, ...