returnObject

returnObject.java

//看了恶俗的borrow，看到return就轻松多了，
//把对象置为空闲状态 
_factory.passivateObject(obj);

// Add instance to pool if there is room and it has passed validation
boolean doAllocate = false;
synchronized (this) {
    if (isClosed()) {
        //检查是否关闭
        shouldDestroy = true;
    } else {
        if((_maxIdle >= 0) && (_pool.size() >= _maxIdle)) {
            //检查空闲的对象是否达到maxIdle
            shouldDestroy = true;
        } else if(success) {
            // borrowObject always takes the first element from the queue,
            // so for LIFO, push on top, FIFO add to end
            if (_lifo) {
                //后入先出，加到队列头部
                _pool.addFirst(new ObjectTimestampPair(obj));
            } else {
                //先入先出加到队列尾部
                _pool.addLast(new ObjectTimestampPair(obj));
            }
            if (decrementNumActive) {
                _numActive--;
            }
            doAllocate = true;
        }
    }
}
//处理请求队列，为等待的请求分配对象。
if (doAllocate) {
    allocate();
}