optimize generic filter

[goodjava]

optimize generic filter

[codecov-commenter]

Codecov Report

Merging #8067 (e115c22) into master (8892a36) will decrease coverage by 0.00%.
The diff coverage is 33.33%.

@@             Coverage Diff              @@
##             master    #8067      +/-   ##
============================================
- Coverage     61.16%   61.15%   -0.01%     
+ Complexity      491      490       -1     
============================================
  Files          1091     1091              
  Lines         43953    43955       +2     
  Branches       6417     6417              
============================================
- Hits          26882    26880       -2     
- Misses        14088    14090       +2     
- Partials       2983     2985       +2     

Impacted Files	Coverage Δ
...ava/org/apache/dubbo/rpc/filter/GenericFilter.java	37.90% <33.33%> (+0.19%)	⬆️
...che/dubbo/remoting/transport/mina/MinaChannel.java	35.52% <0.00%> (-10.53%)	⬇️
.../apache/dubbo/rpc/protocol/AsyncToSyncInvoker.java	62.06% <0.00%> (-10.35%)	⬇️
...ting/exchange/support/header/HeartbeatHandler.java	83.72% <0.00%> (-9.31%)	⬇️
.../remoting/transport/netty4/NettyClientHandler.java	83.05% <0.00%> (-3.39%)	⬇️
...e/dubbo/remoting/exchange/codec/ExchangeCodec.java	77.73% <0.00%> (-2.43%)	⬇️
...a/org/apache/dubbo/monitor/dubbo/DubboMonitor.java	86.66% <0.00%> (-1.91%)	⬇️
...ng/transport/dispatcher/all/AllChannelHandler.java	89.65% <0.00%> (ø)
...apache/dubbo/common/extension/ExtensionLoader.java	81.02% <0.00%> (+0.21%)	⬆️
...g/apache/dubbo/registry/consul/ConsulRegistry.java	60.58% <0.00%> (+0.58%)	⬆️
... and 6 more

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[xiaoheng1]

LGTM