redis源代码查看笔记（备忘）

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1 redis连接池，java客户端实现使用的是apache commons-pool;

2 当达到最大连接数使用的策略：

1）WHEN_EXHAUSTED_BLOCK（默认策略）（A "when exhausted action" type indicating that when the pool is exhausted (i.e., the maximum number of active objects has been reached), theborrowObject method should block until a new object is available, or themaximum wait time has been reached.）

2）WHEN_EXHAUSTED_FAIL（A "when exhausted action" type indicating that when the pool is exhausted (i.e., the maximum number of active objects has been reached), theborrowObject method should fail, throwing aNoSuchElementException.）

3）WHEN_EXHAUSTED_GROW（A "when exhausted action" type indicating that when the pool is exhausted (i.e., the maximum number of active objects has been reached), theborrowObject method should simply create a new object anyway.）

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