Support for Apache Skywalking

[Marcel-Ha]

Add basic support for apache skywalking framework.

Draft, as I want to test first if the pipeline runs. Also it needs to be checked if different configurations are possible.

[Marcel-Ha]

@DaGeRe You can have a look at it now. In addition to the standard configuration I also added a configuration with sampling (was not sure about a good sampling rate though, used 60 per 3 seconds). I think that was the only reasonable configuration option to also include from the possible configuration options but maybe you want to take a look there as well.

[DaGeRe]

Thanks for the PR, looks fine.

It would be nice to have a configuration that disables parts of the process, to get an estimate whether the overhead is caused by the instrumentation, the data collection or writing the data. Would it be possible to have another customize_enhance.xml, which only monitors the constructor, or a method that is not existing? This might yield to instrumentation etc. being started, but no overhead from the real data collection.

[Marcel-Ha]

I added a new configuration which uses the constructor for the customize_enhance.xml. In my limited tests the performance was very similar to the default moobench, so I am not sure if it actually has some overhead or if the differences were just random.

[DaGeRe]

Thanks for the update, let's give it a try in the measurement environment. We can always remove a configuration later.