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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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
88 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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2answers
382 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
237 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
88 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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3answers
266 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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3answers
146 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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2answers
73 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 ...
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1answer
184 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
315 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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2answers
147 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 ...
2
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3answers
926 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
84 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
367 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
votes
1answer
516 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
384 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
142 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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3answers
131 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 ...
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3answers
288 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
85 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
676 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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2answers
93 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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83 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
76 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
1k 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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1answer
261 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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1answer
603 views

Logging in a distributed system

We have several application servers (and different applications) running on Amazon AWS and our main method of logging is a combination of statsd, carbon/graphite, and an alert system based off of the ...
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3answers
99 views

Communicating details of method result?

I have code like this (pseudocode) foreach(Box box in boxes) { if(boxFilter.PassesFilter(box)) { // do something useful } else { Log.Log(format("Box %s was rejected", ...
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2answers
131 views

Logging page/session ID in an inner module

We have a C# ORM module that generates queries. It logs generated queries and other information into the error/trace file. It is used by our web application. Most of our queries are generated ...
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2answers
120 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, ...
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1answer
630 views

What factors should I consider when logging a (JSF) web-app?

I've recently read the article The Problem with logging and was wondering about my current logging strategy. Usualy I use Log4J in my projects and just have to decide which line/attributes I would ...
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3answers
622 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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1answer
39 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 = ...
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3answers
488 views

Maintaining log stream after file name change

I'm trying to log to a file and move it about every 30 seconds. I'm using the os.rename function (which I do from a supervisord process) in python to move the current log to a timestamped log (which ...
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2answers
265 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. ...
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1answer
140 views

Strategy for clients to retrieve real-time log from HTTP server

I have an HTTP Server Service application which has its own logging mechanism. It's written in Delphi. I would like to provide a way for multiple clients to connect to this service and get a real-time ...
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0answers
100 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 ...
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3answers
191 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 ...
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2answers
36 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 ...
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2answers
122 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, ...
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3answers
152 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
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2answers
500 views

Is storing stack traces in database recommended?

The current system I am working on goes through a set of documents & performs some logic using the metadata of the document. If the metadata of a document is fishy..it throws an exception. The ...
0
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3answers
150 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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1answer
95 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 ...
0
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1answer
91 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?
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2answers
136 views

finding patterns into logs

I am trying to put together a way to figure out if incidents occurred based on log content. Typically, on log (or db table) would contain a list of transactions composed as follow: {Timestamp} ...
0
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1answer
109 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 ...
0
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2answers
170 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 ...
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2answers
1k 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 ...