GitHub user martinRocks added a comment to the discussion: Support for template
names
What do you think about doing something like this? I'm not sure if any of the
names are something that my cloud log reader would ingest, but that should fix
part of my problem. To make this work, just add this class to the project and
replace the Layout in the file appender.
```
public class MyLayout : LayoutSkeleton
{
public override void ActivateOptions()
{
}
public override void Format(TextWriter writer, LoggingEvent
loggingEvent)
{
var messageObject = loggingEvent.MessageObject;
if (messageObject is string)
{
writer.WriteLine(messageObject);
return;
}
var messageObjectFormat =
((log4net.Util.SystemStringFormat)messageObject).Format;
var templateNames = GetTemplateNames(messageObjectFormat);
var args = ((log4net.Util.SystemStringFormat)messageObject).Args;
var i = 0;
var dic = new Dictionary<string, string>();
foreach (var name in templateNames)
{
dic.Add(name, args[i].ToString());
i++;
}
var serializer = new JsonSerializer();
serializer.Serialize(writer, new
TemplateWithValue(messageObjectFormat, dic));
writer.WriteLine();
}
private static List<string> GetTemplateNames(string template)
{
var regex = new Regex(@"\{(\w+)\}");
var matches = regex.Matches(template);
return (from Match match in matches select
match.Groups[1].Value).ToList();
}
private class TemplateWithValue
{
public TemplateWithValue(string template, Dictionary<string,
string> values)
{
Template = template;
Values = values;
}
public string Template { get; private set; }
public Dictionary<string,string> Values { get; private set; }
}
}
```
GitHub link:
https://github.com/apache/logging-log4net/discussions/261#discussioncomment-13621719
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