spring管理的mongodb连接池如何切换mongodb复制集？

mongodb spring 配置信息

<mongo:mongo id="replicaSetMongo" host="192.168.0.164:27017,192.168.0.104:27017,192.168.0.162:27017" port="27017">
    <mongo:options 
            connections-per-host="100"
        threads-allowed-to-block-for-connection-multiplier="30"
        auto-connect-retry="true"
        connect-timeout="30000"
        max-wait-time="50000"
        socket-keep-alive="true"
        socket-timeout="50000"    
        slave-ok="true"
        write-number="1"
        write-timeout="0"
        write-fsync="true"/>   
</mongo:mongo> 

当mongodb一台主节点挂时，另一台成为新的主节点。配置的连接池无法自动切换。请问如何才能实现自动切换