I want to save all logs during each day in folder named YYYYMMdd - log4net should handle creating new folder depending on system datetime - how I can setup this?
I want to save all logs during the day to n files of 1MB - I don't want to rewrite old files but to really have all logs during one day - how I can setup this?
I am usin C#
Regards
Alex
Try this (It should be OK!):
<appender name="LogFileAppender" type="log4net.Appender.RollingFileAppender">
<file value="logs\\" />
<appendToFile value="true" />
<DatePattern value="yyyy\\\\MM\\\\dd'.inf.log'" />
<rollingStyle value="Date" />
<param name="StaticLogFileName" value="false" />
<layout type="log4net.Layout.PatternLayout">
<header value="[Header]
" />
<footer value="[Footer]
" />
<conversionPattern value="%date [%thread] %-5level %logger [%ndc] <%property{auth}> - %message%newline" />
</layout>
</appender>
It will create a logfile named 'logs\2010\04\02.inf.log' (let date be 2010-04-02)
Thank you all.
We created SortByFolderFileAppender, which inherit from RollingFileAppender
Example of final result:
somewhere\Logs\20100305\Client-104615.0
namespace CustomLogging
{
public class SortByFolderFileAppender : log4net.Appender.RollingFileAppender
{
protected override void OpenFile(string fileName, bool append)
{
//Inject folder [yyyyMMdd] before the file name
string baseDirectory = Path.GetDirectoryName(fileName);
string fileNameOnly = Path.GetFileName(fileName);
string newDirectory = Path.Combine(baseDirectory, DateTime.Now.ToString("yyyyMMdd"));
string newFileName = Path.Combine(newDirectory, fileNameOnly);
base.OpenFile(newFileName, append);
}
}
}
<appender name="SortByFolderFileAppender" type="CustomLogging.SortByFolderFileAppender">
<file type="log4net.Util.PatternString" value="Logs\Client"/>
<appendToFile value="true"/>
<rollingStyle value="Composite"/>
<datePattern value="-HHmmss"/>
<maxSizeRollBackups value="40"/>
<maximumFileSize value="1MB"/>
<countDirection value="1"/>
<encoding value="utf-8"/>
<staticLogFileName value="false"/>
<layout type="log4net.Layout.PatternLayout">
<conversionPattern value="%date{HH:mm:ss.fff}|%-5level|%message%newline"/>
</layout>
</appender>
I believe, you may create your own appender, based on the FileAppender class. You may need to override the OpenFile method to create a file in the right location.
You could use the rollinglogfileappender which creates files named by date and starts a new file at midnight. Then just write a script that moves them to a correct map at 00.01.
As for logging all files during one day with a maximum of 1 MB per file, here's an example:
<appender name="RollingLogFileAppender" type="log4net.Appender.RollingFileAppender">
<file type="log4net.Util.PatternString" value="Logging\\MWLog"/>
<appendToFile value="true"/>
<rollingStyle value="Composite"/>
<datePattern value="-yyyyMMdd"/>
<maxSizeRollBackups value="-1"/>
<maximumFileSize value="1MB"/>
<countDirection value="1"/>
<encoding value="utf-8"/>
<staticLogFileName value="false"/>
<layout type="log4net.Layout.PatternLayout">
<conversionPattern value="%date{HH:mm:ss.fff}|%-5level|%message%newline"/>
</layout>
</appender>
To build from the answer above using the SortByFolderFileAppender.
This is how we resolved the issue using rolling date for log filenames. I changed the staticLogFileName to true so the entire filename is passed into the OpenFile method.
If the filename ends in ".log" then nothing needs to be appended. I'm guessing some kind of locking has occurred and I want log4net to try using the same filename again, hoping the previous lock has been released.
Although, I'm not sure if this could end up causing an infinite call to OpenFile if the file is locked and won't let go of it. We did create a web service using the producer consumer pattern to log everything in one location from all applications in the system, which is currently ten and growing.
We don't need to include log4net into any of the other applications but we needed to create a web client class that is accessible by all applications to use for logging to the web service.
The result for the filename is "Logs\Client\2017\11\08.log" and obviously changes everyday.
protected override void OpenFile( string fileName, bool append )
{
// append "\yyyy\mm\dd.log" to create the correct filename.
if ( !fileName.EndsWith( ".log") )
fileName = $#"{fileName}\{DateTime.Now:yyyy\\MM\\dd}.log";
base.OpenFile( fileName, append );
}
Modification of the configuration from above.
<appender name="xxxRollingFileAppender" type="namespace.xxxRollingFileAppender">
<file value="Logs\Client"/>
<staticLogFileName value="true"/>
<appendToFile value="true"/>
<maxSizeRollBackups value="40"/>
<maximumFileSize value="1MB"/>
<encoding value="utf-8"/>
<layout type="log4net.Layout.PatternLayout">
<conversionPattern value="%date{HH:mm:ss.fff}|%-5level|%message%newline"/>
</layout>
</appender>
Related
I have implemented log4net in my windows service and it works as expected and created new file with current date as per config setting.
<configSections>
<section name="log4net" type="log4net.Config.Log4NetConfigurationSectionHandler,Log4net" />
</configSections>
<log4net>
<appender name="file" type="log4net.Appender.RollingFileAppender">
<file type="log4net.Util.PatternString" value="Logs\log-%utcdate{yyyy-MM-dd}.txt" />
<staticLogFileName value="false" />
<appendToFile value="true" />
<rollingStyle value="Composite" />
<maxSizeRollBackups value="5" />
<maximumFileSize value="5MB" />
<staticLogFileName value="true" />
<layout type="log4net.Layout.PatternLayout">
<conversionPattern value="%date [%thread] %level %logger - %message%newline" />
</layout>
<param name="DatePattern" value="dd.MM.yyyy'.log'" />
</appender>
<root>
<level value="ALL" />
<appender-ref ref="file" />
</root>
</log4net>
Problem here is that, if my service is running from last 2 days, so it will not create new file with current date it keep reference of 2 days older file and adding logs into older file instead of create new file for that day.
Logger code is like
public static class Logger
{
public static log4net.ILog Log { get; set; }
static Logger()
{
Log = log4net.LogManager.GetLogger(typeof(System.Reflection.MethodBase));
}
public static void Trace(string message)
{
Log.Info(message);
}
public static void LogException(Exception ex)
{
StringBuilder builer = new StringBuilder();
builer.AppendLine("=============Exception===========");
builer.AppendLine("Exception: {0}");
builer.AppendLine("StackTrack: {1}");
Log.ErrorFormat(builer.ToString(), ex.Message, ex.StackTrace);
}
}
To log info into log file I am using code
Logger.Trace("Hello");
What is code level changes require for me to, create new log file every day even service/desktop application is running continuously from last many days?
Your configuration has both <staticLogFileName value="false" /> and <staticLogFileName value="true" />, which is may explain why it's not rolling correctly.
I suggest that you remove the <staticLogFileName value="true" /> and change the file and DatePattern as follows:
<file value="Logs\log-" />
...
<param name="DatePattern" value="yyyy-MM-dd'.log'" />
With staticLogFileName false, the date string will be appended to the base file name to give e.g.:
Logs\log-2018-01-30.log
I would note however that log4net will only check if it needs to roll the log file when you actually log a message, so if you aren't logging frequently, it may not roll the moment the next day begins.
I'm using log4net in my mvc 4 project to log any error & exceptions. My configuration file looks like below
<appender name="AsynchronousLog4NetAppender" type="Umbraco.Core.Logging.AsynchronousRollingFileAppender, Umbraco.Core">
<file value="App_Data\Logs\APIErrorsLog.txt"/>
<lockingModel type="log4net.Appender.FileAppender+MinimalLock"/>
<appendToFile value="true"/>
<rollingStyle value="Date"/>
<maximumFileSize value="5MB"/>
<layout type="log4net.Layout.PatternLayout">
<conversionPattern value="%date [%thread] %-5level %logger - %message%newline"/>
</layout>
<encoding value="utf-8"/>
</appender>
I have also created a view on which I read & output this file's content App_Data\Logs\APIErrorsLog.txt and show the errors. The issue is a new file is created every day. I guess I can increase the size using maximumFileSizeattribute but how I can stop the creation of new file everyday?
Thanks
You are getting a new file every day because you have set <rollingStyle value="Date"/> - use <rollingStyle value="Size" /> to only create a new file when the maximum size is reached. You may want to also add a maxSizeRollBackups entry as well to limit the number of files.
When I log in my dev environment there is no problem but when I deploy with a windows installer no log files are produced:
<log4net>
<root>
<level value="ALL"/>
<appender-ref ref="LogFileAppender"/>
</root>
<appender name="LogFileAppender" type="log4net.Appender.RollingFileAppender">
<lockingModel type="log4net.Appender.FileAppender+MinimalLock"/>
<param name="File" value="C:\Logs\log-file.txt"/>
<param name="AppendToFile" value="true"/>
<rollingStyle value="Size"/>
<maxSizeRollBackups value="10"/>
<maximumFileSize value="10MB"/>
<staticLogFileName value="true"/>
<layout type="log4net.Layout.PatternLayout">
<param name="ConversionPattern" value="%date [%thread] %-5level %logger [%C{1}.%M] - %message%newline"/>
</layout>
</appender>
</log4net>
I read that it may be that it cannot find the app.config but how do I tell it where to find it?
The issue was that log4net couldn't find the config file at run time after the dll was installed. Fixed by a suggestion here. In the end, my solution looked like this:
FileInfo fi = new FileInfo(AppDomain.CurrentDomain.BaseDirectory + "Assembly.dll.config");
log4net.Config.XmlConfigurator.Configure(fi);
_log.Info("Hello logging...");
Thank you for all of your input!
The app.config project file is turned to the the application.exe.config file after compilation. Maybe you are not deploying it with the installer?
I have one windows service. For Logging purpose in that service I am using Log4Net.dll. Now my requirement is that I want to create a new log file everyday and it should keep the log of only previous 7 days. Means on 8th day, it should delete first day file and use new file. I am using appender as:
<appender name="LogFileAppender" type="log4net.Appender.RollingFileAppender">
<file type="log4net.Util.PatternString" value="D:\Log\%property{LogName}" />
<AppendToFile value="true" />
<rollingStyle value="Date" />
<maxSizeRollBackups value="100" />
<staticLogFileName value="false" />
<layout type="log4net.Layout.PatternLayout">
<conversionPattern value="%newline %date %-5level %C.%M() - %message" />
</layout>
</appender>
And at service startup I am configuring logger as:
log4net.GlobalContext.Properties["LogName"] = "App_" + DateTime.Now.ToString("MMddyyyy") + ".log";
log4net.Config.XmlConfigurator.Configure();
So is there any functionality of Log4Net that will achieve above functionality? Or is there any other way to do it? Any type of help will be appreciated.
I'm afraid you can't: RollingFileAppender Class
A maximum number of backup files when rolling on date/time boundaries
is not supported
Have a look at this thread for other suggestions: Log4Net: set Max backup files on RollingFileAppender with rolling Date
To implement log file everyday you would use:
<rollingStyle value="Date" />
<datePattern value="yyyyMMdd" />
I have a application which is loading PlugIn-Modules with reflection.
The Application is defining a log4net-log-appender in the app.config like:
<appender name="RollingFileAppender" type="log4net.Appender.RollingFileAppender">
<file value="logs\xxx.log" />
<appendToFile value="true" />
<rollingStyle value="Size" />
<maxSizeRollBackups value="10" />
<maximumFileSize value="1MB" />
<staticLogFileName value="true" />
<threshold value="DEBUG" />
<layout type="log4net.Layout.PatternLayout">
<conversionPattern value="%date [%thread] %-5level %logger{2} - %message%newline" />
</layout>
</appender>
I get the Logger in the code like:
private static readonly ILog log = LogManager.GetLogger(typeof(Indexer));
Now, I am searching a way to declare different Log-Files for each Module (assembly), which is loaded as PlugIn with reflection.
The first problem is, that the modules are using Business-Library-Classes together (they are in a assembly which is used of all modules) which also generates log-entries. This entries should also be inserted in the log-file of the module.
The second problem is, I don't know the modules at developing-time. So I cannot insert some config in the app.config.
The second problem is, i don't know the modules at developing-time. So i cannot insert some config in the app.config.
This reveals that it might not be possible in the config file. When you add a new plugin, you can add code to add a new appender for the plugin.
Hers some (code) to get you inspired:
// Setup RollingFileAppender
log4net.Appender.RollingFileAppender fileAppender = new log4net.Appender.RollingFileAppender();
fileAppender.Layout = new log4net.Layout.PatternLayout("%d [%t]%-5p %c [%x] - %m%n");
fileAppender.MaximumFileSize = "100KB";
fileAppender.MaxSizeRollBackups = 5;
fileAppender.RollingStyle = log4net.Appender.RollingFileAppender.RollingMode.Size;
fileAppender.AppendToFile = true;
fileAppender.File = fileName;
fileAppender.Name = "XXXRollingFileAppender";
log4net.Config.BasicConfigurator.Configure(fileAppender);
You need to add that it is only from the plugin-assembly you want to log, and maybe omit them from the already configures RollingFileAppender.