How to add custom MTP logger

[filzrev]

I want to add custom MTP logger that forward log to Open Telemetry Logs.

But it seems not possible. Because logger related class is defined as internal.
And DI registration is not exposed to MTP extensions..

Is there any extension points to customize MTP logging behaviors?

[Youssef1313]

What you are looking for is a reporter, not a logger. Reporters in MTP are the equivalent of loggers in VSTest. We have a sample here (permalink)

[filzrev]

MTP logs that are written with ILogger interface seems not send to MessageBus.
So it can't write custom reporter that handle log message.

I found there is ILoggingManager::AddProvider is exposed as experimental feature.

I've confirmed it can write custom logger that forward MTP logs to Microsoft.Extension.Logging based logger.
(Except for TestApplication logs. These logs are written with FileLoggerProvider and LoggerFactory is not used.)