I found my table has a version column so that hibernate has a error. But what it provides features ? I read the doc , but not understand well.
Javadoc:
/**
* Additional contract for types which may be used to version (and optimistic lock) data.
*
* @author Gavin King
* @author Steve Ebersole
*/
感谢。
当不止一名客户希望更新相同数据时,你可以选择:
the version column is an implementation of the third strategy. If you get errors chances are you have two clients which try to alter data concurrently.
how to implement optimistic (maybe not the best)
http://en.wikipedia.org/wiki/Optimistic_locking”rel=“nofollow noreferer”>furtherread
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