Fix issue24

[Synex-wh]

Motivation:

fix #19 to #24 bug and new feature

[codecov-io]

Codecov Report

❗ No coverage uploaded for pull request base (master@bf57100). Click here to learn what that means.
The diff coverage is 45.1%.

@@            Coverage Diff            @@
##             master      #41   +/-   ##
=========================================
  Coverage          ?   60.03%           
  Complexity        ?       44           
=========================================
  Files             ?      378           
  Lines             ?    13333           
  Branches          ?     1314           
=========================================
  Hits              ?     8004           
  Misses            ?     4422           
  Partials          ?      907

Impacted Files	Coverage Δ	Complexity Δ
...ofa/registry/common/model/metaserver/DataNode.java	43.39% <ø> (ø)	0 <0> (?)
.../server/meta/bootstrap/AbstractNodeConfigBean.java	46.8% <ø> (ø)	0 <0> (?)
...er/data/remoting/dataserver/task/AbstractTask.java	75% <ø> (ø)	0 <0> (?)
...ta/event/handler/DataServerChangeEventHandler.java	40.69% <0%> (ø)	0 <0> (?)
...rver/data/datasync/sync/AbstractAcceptorStore.java	53.65% <0%> (ø)	0 <0> (?)
...ssion/scheduler/task/WatcherRegisterFetchTask.java	0% <0%> (ø)	0 <0> (?)
...er/session/scheduler/task/DataChangeFetchTask.java	0% <0%> (ø)	0 <0> (?)
...ion/scheduler/task/ReceivedConfigDataPushTask.java	0% <0%> (ø)	0 <0> (?)
...server/session/resource/SessionDigestResource.java	35.35% <0%> (ø)	0 <0> (?)
...ent/handler/LocalDataServerChangeEventHandler.java	17.64% <0%> (ø)	0 <0> (?)
... and 42 more

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