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Logging to different Log4Net loggers with dependency injection #124

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tiofred opened this issue Apr 8, 2022 · 1 comment
Open

Logging to different Log4Net loggers with dependency injection #124

tiofred opened this issue Apr 8, 2022 · 1 comment

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@tiofred
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tiofred commented Apr 8, 2022

Hello.
I achieved this :
Using dependency injection, I managed to load log4net confile and to pass ILogger<> to constructors.
It works fine with a root logger and multiple appenders filtering the level, so i.e. it logs DEBUG to a file and ERROR to another.
.ConfigureLogging(logging => { logging.ClearProviders(); logging.SetMinimumLevel(LogLevel.Trace); logging.AddLog4Net("config.log4Net.xml", true);
`

<appender name="MyServiceAppender" type="log4net.Appender.RollingFileAppender">
	<encoding type="System.Text.UTF8Encoding" />
	<file value="..\Infos.log" />
	<appendToFile value="true" />
	<maximumFileSize value="5000KB" />
	<maxSizeRollBackups value="20" />
	<rollingStyle value="Size" />
	<layout type="log4net.Layout.PatternLayout">
		<conversionPattern value="%date %-5level %logger.%method [%line] > %message%newline" />
	</layout>
	<filter type="log4net.Filter.LevelRangeFilter">
		<levelMin value="DEBUG" />
		<levelMax value="INFO" />
	</filter>
</appender>	

<appender name="ErrorAppender" type="log4net.Appender.RollingFileAppender">
	<encoding type="System.Text.UTF8Encoding" />
	<file value="..\Error.log" />
	<appendToFile value="true" />
	<maximumFileSize value="10000KB" />
	<maxSizeRollBackups value="20" />
	<rollingStyle value="Size" />
	<layout type="log4net.Layout.PatternLayout">
		<conversionPattern value="%message%newline" />
	</layout>
	<filter type="log4net.Filter.LevelRangeFilter">
		<levelMin value="ERROR" />
		<levelMax value="ERROR" />
	</filter>
</appender>

<root>
	<level value="ALL" />
	<appender-ref ref="MyServiceAppender" />
	<appender-ref ref="ErrorAppender" />	
</root>

`

What I'd like is :
Configure in log4net two loggers, one for the on-the-fly infos, one for the on-the-fly datas.

<appender name="MyServiceAppender" type="log4net.Appender.RollingFileAppender">
	<encoding type="System.Text.UTF8Encoding" />
	<file value="..\Infos.log" />
	<appendToFile value="true" />
	<maximumFileSize value="5000KB" />
	<maxSizeRollBackups value="20" />
	<rollingStyle value="Size" />
	<layout type="log4net.Layout.PatternLayout">
		<conversionPattern value="%date %-5level %logger.%method [%line] > %message%newline" />
	</layout>
	<filter type="log4net.Filter.LevelRangeFilter">
		<levelMin value="DEBUG" />
		<levelMax value="INFO" />
	</filter>
</appender>	

<appender name="ErrorAppender" type="log4net.Appender.RollingFileAppender">
	<encoding type="System.Text.UTF8Encoding" />
	<file value="..\Error.log" />
	<appendToFile value="true" />
	<maximumFileSize value="10000KB" />
	<maxSizeRollBackups value="20" />
	<rollingStyle value="Size" />
	<layout type="log4net.Layout.PatternLayout">
		<conversionPattern value="%message%newline" />
	</layout>
	<filter type="log4net.Filter.LevelRangeFilter">
		<levelMin value="ERROR" />
		<levelMax value="ERROR" />
	</filter>
</appender>

<appender name="DataAppender" type="log4net.Appender.RollingFileAppender">
	<encoding type="System.Text.UTF8Encoding" />
	<file value="..\Data.log" />
	<appendToFile value="true" />
	<maximumFileSize value="10000KB" />
	<maxSizeRollBackups value="20" />
	<rollingStyle value="Size" />
	<layout type="log4net.Layout.PatternLayout">
		<conversionPattern value="%message%newline" />
	</layout>
	<filter type="log4net.Filter.LevelRangeFilter">
		<levelMin value="DEBUG" />
		<levelMax value="DEBUG" />
	</filter>
</appender>

<logger name="MyService">
	<level value="ALL" />
	<appender-ref ref="MyServiceAppender" />
            <appender-ref ref="ErrorAppender" />		
</logger>
<logger name="DataService">
	<appender-ref ref="DataAppender" />
	<level value="DEBUG" />
</logger>	
But also being able to inject those two loggers in my constructors to be able to log inside MyServiceAppender or DataAppender using the DEBUG level. `myServiceLogger.LogDebug("test");` goes to Infos.log `myDataLogger.LogDebug("test");` goes to Data.log

Is there any way to achieve this ?
Thanks for the help.

@tiofred
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tiofred commented Apr 12, 2022

I found a way to achieve this, with dependency injection.
I write it here, it might be useful for someone else :
I replaced in the constructor's prototype
ILogger<AcquisitionManager> myLogger
by
ILoggerFactory loggerFactory
and added
ILogger myServiceLogger = loggerFactory.CreateLogger("MyService"); ILogger myDataLogger = loggerFactory.CreateLogger("DataService");

I leave it open for now, if you think that's the right way it should be closed.
If there's another way, I'd be glad to hear about it.

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