refactor

[pingww]

refactor will and retain

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 12.38938% with 198 lines in your changes missing coverage. Please review.

Project coverage is 36.81%. Comparing base (edbfa39) to head (0210408).
Report is 108 commits behind head on develop.

Files with missing lines	Patch %	Lines
...apache/rocketmq/mqtt/cs/session/loop/WillLoop.java	0.00%	119 Missing ⚠️
...meta/raft/processor/RetainedMsgStateProcessor.java	0.00%	21 Missing ⚠️
.../rocketmq/mqtt/example/MqttWillRetainProducer.java	0.00%	19 Missing ⚠️
...ketmq/mqtt/meta/raft/processor/StateProcessor.java	60.00%	16 Missing and 2 partials ⚠️
...apache/rocketmq/mqtt/meta/raft/MqttRaftServer.java	7.14%	13 Missing ⚠️
...org/apache/rocketmq/mqtt/meta/config/MetaConf.java	0.00%	4 Missing ⚠️
...ache/rocketmq/mqtt/meta/raft/MqttStateMachine.java	0.00%	2 Missing ⚠️
...rg/apache/rocketmq/mqtt/ds/meta/MetaRpcClient.java	0.00%	1 Missing ⚠️
.../rocketmq/mqtt/example/MqttWillRetainConsumer.java	0.00%	1 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##           develop     #178      +/-   ##
===========================================
- Coverage    37.01%   36.81%   -0.20%     
===========================================
  Files          128      128              
  Lines         5927     5948      +21     
  Branches       842      841       -1     
===========================================
- Hits          2194     2190       -4     
- Misses        3367     3392      +25     
  Partials       366      366              

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