Please answer these questions before submitting your issue.

• Why do you submit this issue?
  I want to use skywaling with brpc-java.
  https://github.com/baidu/brpc-java

• Question or discussion
  discussion

• Bug
  no

• Requirement
  yes

• Feature or performance improvement
  Feature

Question

• What do you want to know?

Bug

• Which version of SkyW

Based on comments like this i suggest a compatiblity matrix in the readme under the section Will Dapper work with my DB provider?.

This way new users can get some heads-up before investing time and effort. Especially Microsoft.Data.Sqlite

developer guide: development note for Middleware Engineering

• why need Middleware Engineering
• how to do it

Middleware Engineering 🔥, like multi-version Java full support(support low version Java and full functions of high version Java), is boring but essential for middleware! 🤣

https://github.com/alibaba/transmittable-thread-local/releases/tag/v2.5.0

I figured out that node-sass dependency mentioned in web package is obsolete now.

I tried to change it to

"devDependencies": {
"@vue/cli-plugin-babel": "^3.0.0-rc.10",
"@vue/cli-plugin-eslint": "^3.0.0-rc.10",
"@vue/cli-service": "^3.0.0-rc.10",
"node-sass": "^4.14.0",
"sass-loader": "^7.0.3",
"vue-template-compiler": "^2.5.16"
},

then web-vue built s

I understand that we use 'cls' for context storage/thread local storage. However, it is a little painful for me right now to try to get spans from thread local storage, that is because there are many moving parts: I need to initialize the tracer or get the global tracer (will creating a new tracer work?) and then check the current context but then check if the contextManager has a rootSpan. Also g

I'm not sure if I'm just tired and stupid, but I have gone through all the examples and I cannot seem to find a way to limit the number of results returned...

Is this a limitation at the moment?

Thanks for the good examples.
There's warning when running example/queue:
queue/runner.py:19: DeprecationWarning: Application.make_handler(...) is deprecated, use AppRunner API instead

python 3.7.2
aiozipkin==0.5.0
aiohttp==3.5.4
aiojobs==0.2.2

Checked latest aiohttp doc., maybe need to update like this (it works without warnings):

# /examples/queue/runner.py
def ru