Supporting RequestRateLimiterGatewayFilterFactory

[xiaoy00]

Please answer these questions before submitting pull request

• Why submit this pull request?

• [1] Bug fix

• New feature provided

• Improve performance

• Related issues
  no

---

Bug fix

• Bug description.
  when i use the RequestRateLimiterGatewayFilterFactory for limit.
  then ContextManager.capture() can not work in NettyRoutingFilterInterceptor.class
  because Thread is changed from 'reactor-http-nio' to 'lettuce-nioEventLoop'

• How to fix?
  get ContextSnapshot on FilteringWebHandlerInterceptor and set it into SWTransmitter.
  then NettyRoutingFilterInterceptor can use ContextSnapshot to ContextManager.continued(swTransmitter.getSnapshot());
  and i have to create a new LocalSpan for bring ContextManager.continued() worked

---

New feature or improvement

• Describe the details and related test reports.

[wu-sheng]

@xiaoy00 Could you provide demo codes about this?

[zhaoyuguang]

The current gateway test demo, it would be better to enrich this case here.

[xiaoy00]

The current gateway test demo, it would be better to enrich this case here.

I have already submitted the case on gateway test demo, please have a look

[zhaoyuguang]

Hi @xiaoy00 , Please modify the code according to code style and modify testcase so that test cases can work.

[xiaoy00]

Hi @xiaoy00 , Please modify the code according to code style and modify testcase so that test cases can work.
you talk about gateway-2.1.x-plugin or gateway test demo ?

[zhaoyuguang]

Fix gateway-2.1.x-plugin according to code style.
And make gateway test demo can work.

[xiaoy00]

Fix gateway-2.1.x-plugin according to code style.
And make gateway test demo can work.
check style is ok on my idea.
demo can work too, by the way , its need redis to work.
i dont know what's the error . and i showed you on QQ.
u can give me some error infos.

[wu-sheng]

You should verify style by maven command. It is what we used on CI. Also, click details link, we have the logs.

[wu-sheng]

The referred demo is integratuon test, you need to read the plugin tests document and change the codes, then make tests passed.

In open source, we need to make sure cases are checked in any further changes. But not just your local tests.
Please understand, we need to make sure the whole community good, and make sure all upstream changes are safe and could be reverified always.
You need to spend mire time on tests than code changes.

[wu-sheng]

#3603 merged. Please continue.

[xiaoy00]

#3603 merged. Please continue.
roger!

[wu-sheng]

There are many filed not under Apache 2.0 license. So CI fail with rat check unpassed. Please fix.

@zhaoyuguang Please review the code changes.

[wu-sheng]

Resolve the conflicts, please.

[zhaoyuguang]

/run agent-plugin-test-3

[xiaoy00]

/run agent-plugin-test-3

[xiaoy00]

/run agent-plugin-test-3

[zhaoyuguang]

LGTM

[wu-sheng]

Cast to approve as @zhaoyuguang approved.