Ftr: Generic Implement

[Patrick0308]

What this PR does:
Ftr: add Generic Implement

Which issue(s) this PR fixes
Fixes #290

Special notes for your reviewer:

Does this PR introduce a user-facing change?:

[codecov-io]

Codecov Report

❗ No coverage uploaded for pull request base (develop@1c5cca4). Click here to learn what that means.
The diff coverage is 0%.

@@            Coverage Diff             @@
##             develop     #291   +/-   ##
==========================================
  Coverage           ?   66.56%           
==========================================
  Files              ?      113           
  Lines              ?     7230           
  Branches           ?        0           
==========================================
  Hits               ?     4813           
  Misses             ?     1946           
  Partials           ?      471

Impacted Files	Coverage Δ
filter/tps/tps_limiter_method_service.go	80% <ø> (ø)
filter/tps/tps_limit_fix_window_strategy.go	100% <ø> (ø)
filter/tps/tps_limit_sliding_window_strategy.go	100% <ø> (ø)
...r/tps/tps_limit_thread_safe_fix_window_strategy.go	100% <ø> (ø)
filter/filter/generic_filter.go	67.69% <0%> (ø)

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[Patrick0308]

@AlexStocks Do you think I should capitalize the first letter of methodName for generic invoke because the first letter of go's methodName should be upper.

[AlexStocks]

@AlexStocks Do you think I should capitalize the first letter of methodName for generic invoke because the first letter of go's methodName should be upper.

pls give some adives @fangyincheng @hxmhlt @pantianying

[fangyincheng]

you need a switch to control whether generic_service should be working, instead of default

[Patrick0308]

@fangyincheng In java sdk, generic filter is default filter. In go, do we need to control it be working?

[fangyincheng]

@AlexStocks Do you think I should capitalize the first letter of methodName for generic invoke because the first letter of go's methodName should be upper.

dubbo-go support lowercase method to provide a service.

[fangyincheng]

@fangyincheng In java sdk, generic filter is default filter. In go, do we need to control it be working?

ok

[Patrick0308]

@AlexStocks Do you think I should capitalize the first letter of methodName for generic invoke because the first letter of go's methodName should be upper.

dubbo-go support lowercase method to provide a service.

I see.

[fangyincheng]

LGTM

[fangyincheng]

Has it been tested with java Dubbo？

[Patrick0308]

@fangyincheng yeah, I tested

[pantianying]

LGTM