Joys of Programming » Log Analysis

How to install log-analysis in Ubuntu/Linux?

Joys of Programming — Sat, 19 Mar 2011 19:11:06 +0000

Log-analysis will analyse syslog, wtmp and sulog files in the system in order to summarise information found there. It will also apply a number of known expressions in order to extract relevant data it knows of. Log-analysis can be customized and extended with custom configuration files to detect certain events that are system-dependant. (dpkg package [...]

Create Log4cpp Layout

Joys of Programming — Fri, 15 Jan 2010 18:20:28 +0000

Apart from the Simple and Basic Layout of log4cpp, you can create your own log pattern using the Pattern Layout. But you can add certain strings to the pattern. If you want to add additional functionality like displaying process ID, hostname using functions like getpid(), gethostbyname(), you need to create your own layout. You can [...]

How to direct logs to multiple log files (destinations) – log4cpp

Joys of Programming — Fri, 15 Jan 2010 14:23:54 +0000

log4cpp can not only be used to log the events to a log file or standard output, but also helps you to log events to multiple destinations. For this purpose, either you can add multiple appenders to a single category or make use of multiple Categories. We will explore the first options. With this option, [...]

log4cpp::PropertyConfigurator – Configure with configuration files

Joys of Programming — Thu, 14 Jan 2010 06:42:21 +0000

log4cpp can also be configured with the configuration files. log4cpp::PropertyConfigurator can be used for this purpose. It has a single function which takes as input the configuration file. Simply specify the configuration in a file. You must specify the layout, priority and the appender in the configuration file as shown here You can read here [...]

log4cpp::PatternLayout – Available log4cpp log formats

Joys of Programming — Thu, 14 Jan 2010 06:38:31 +0000

log4cpp supports three layouts: Simple Layout, Basic Layout and PatternLayout. Simple and Basic Layout are the simplest ones and you need not configure them in any way. The display the log in a fixed format. log4cpp::PatternLayout has the additional advantage that it supports four different formats and provides a mechanism to create a format of [...]

OstreamAppender: Direct the log4cpp logs to standard Output

Joys of Programming — Mon, 11 Jan 2010 13:50:13 +0000

log4cpp enables you to easily log important events. The logs can be directed to files or even periodically rolled back and back up. There are multiple destinations for the log files and you can decide which one to choose from. Though in most cases, you want to use log files, you can also make use [...]

log4cpp::RollingFileAppender – How to Backup and Roll Over log files?

Joys of Programming — Mon, 04 Jan 2010 18:16:43 +0000

It is very important to log the events in your software both for analytics and debugging. Log4cpp is helpful for logging in with C++. Log4Cpp::File Appender can be used to direct the output of logs to a file. But there are certain challenges that you may face while using log files The files can soon [...]

log4cpp::Appender – Destination of Logs

Joys of Programming — Fri, 01 Jan 2010 10:55:58 +0000

As pointed out in log4cpp tutorial, one of the important things while initializing logging using log4cpp is to decide the destination of the log. It can be any file often known as log file or even across the network. An object of the class log4cpp::Appender must be initialized for this purpose as shown in the [...]

A Simple log4cpp example

Joys of Programming — Thu, 31 Dec 2009 10:04:23 +0000

As pointed in the log4cpp tutorial, to program with log4cpp, you must be instantiate the following Appender: The destination of your log file Layout: The format of your log file Category: The type of logging like critical or debugging purposes The following simple program depicts this. Do not forget to change the value of LOGFILE. [...]

Log4Cpp Tutorial

Joys of Programming — Thu, 31 Dec 2009 09:14:14 +0000

log4cpp is used for logging in C++. Given below is the log4cpp tutorial. The tutorial explains the various features of log4cpp with examples. log4cpp Tutorial Introduction to Logging log4cpp for logging in C++ Installation of log4cpp Install log4cpp from sources A sample Log4cpp Example Compile and link log4cpp programs Three Important Steps for Log4cpp programming [...]