MongoDB\Driver\Monitoring\TopologyChangedEvent::getPreviousDescription
(mongodb >=1.13.0)
MongoDB\Driver\Monitoring\TopologyChangedEvent::getPreviousDescription — Returns the previous description for the topology
说明
final public MongoDB\Driver\Monitoring\TopologyChangedEvent::getPreviousDescription(): MongoDB\Driver\TopologyDescription
参数
此函数没有参数。
返回值
Returns the previous MongoDB\Driver\TopologyDescription for the topology.
错误／异常
- Throws MongoDB\Driver\Exception\InvalidArgumentException on argument parsing errors.
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