如何配置一个附加程序来记录所有log4net ThreadContext / GlobalContext / LogicalThreadContext属性？

Question

How to configure an appender to log all log4net ThreadContext/GlobalContext/LogicalThreadContext properties?

I would like to use custom properties in my application and log everything into a textfile. Every logmessage should be a valid JSON-Object.

I would like to include all properties from the different Context-Objects (Thread/LogicalThread/MDC/Global). But all examples I find need the knowledge of the property-key.

I found an answer which leads me to the thought, that this is not possible with the API at all: Log4Net: Enumerating GlobalContext properties?

If there is no official way to do this, would this code point to the correct direction?

log4net.ext.json seems to ignore the context-properties

Answer 1

simply just use below conversion pattern, the [%property] would cover all the properties in the context.

%date [%thread] %-5level %logger [%property] - %message%newline

For JSON object, then you need to write your own converter.

Answer 2

With log4net.Ext.Json , one could use the property member:

<appender...>
    <layout type='log4net.Layout.SerializedLayout, log4net.Ext.Json'>
        <decorator type='log4net.Layout.Decorators.StandardTypesDecorator, log4net.Ext.Json' />
        <default /> <!--explicit default members-->
        <member value='property' />
    </layout> 
</appender>