* feature：data synchronization function

* feature：data synchronization function

* feature：data synchronization function

* fix：add license

* fix：resource close bug

* fix：remove class author

* fix：Improve test coverage

* fix：add UT

* fix：add UT

* fix：data sync node renamed to datax

* fix：add UT

* fix: UT bug

* fix：Optimize variable name

* fix：pom

* fix：Variable name error

* fix：optimize the code