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Lock and Concurrency in JPA

There are tow locking ways: optimistic and pessimistic locking. Optimistic locking applies the following case: there are infrequenct conflicts between concurrrent transactions t...

2017/05/15 14:08
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dataset website

GroupLens Research has collected and made avaialable rating data sets from the MovieLens web site(http://movielens.org). http://grouplens.org/datasets/movielens/...

2015/05/19 17:37
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