Concurrency in the java.util.concurrent collection is enabled via re-entrant read-write locks and is now supported natively inside Terracotta 2.4.

concurrent中的集合的并发性是通过再入读写锁实现的，现在已经得到Terracotta 2.4的原生支持。

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Pessimistic session locks should generally be write locks; they should let other users read the locked data, unless there is a very strong case to not do so.

悲观会话锁通常为写入锁，它们允许其他用户读取锁定的数据，除非遇到不能读取的情况。

youdao

Pessimistic session locks should generally be write locks; they should let other users read the locked data, unless there is a very strong case to not do so.

悲观会话锁通常为写入锁，它们允许其他用户读取锁定的数据，除非遇到不能读取的情况。

youdao