问题描述
我正在研究Clojure中的并发编程。
I am looking into the Concurrency programming in Clojure .http://clojure.org/concurrent_programming
我得知，原子，参考和代理表单用于维护程序状态。
I got to know that atom, ref and agent forms are used to maintain program state.
只有 ref 用于协调更新，因此在执行更改时使用 dosync 宏。
Only ref is used for coordinated updates , so dosync macro is used when performing changes.
所以很明显，STM引擎在这一点上涉及。
So it is obvious that STM engine is involved at this point.
只是想清楚下面的怀疑我有，
Just wanted to be clear about following doubt I have,
推荐答案
STM与代理相关，发送，发送和 send-via 在 dosync 块中调用时，只会生效一次（且如果）事务成功提交。
The STM is related to Agents in that send, send-off and send-via, when called inside a dosync block, only take effect once (and if) the transaction successfully commits.
STM和原子之间没有关系。
There is no relationship between the STM and Atoms.
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