ClearRules clears all hotspot param flow rules.

ClearRulesOfResource clears resource level hotspot param flow rules.

GetRules returns all the hotspot param flow rules based on copy.

GetRulesOfResource returns specific resource's hotspot parameter flow control rules based on copy.

LoadRules replaces all old hotspot param flow rules with the given rules.

LoadRulesOfResource loads the given resource's hotspot param flow rules to the rule manager, while all previous resource's rules will be replaced.

SetTrafficShapingGenerator sets the traffic controller generator for the given control behavior.

Concurrency 标识并发统计.

QPS 标识每秒的统计数.

ConcurrencyStatSlot is to record the Concurrency statistic for all arguments.

ParamsMetric carries real-time counters for frequent ("hot spot") parameters.

Rule 代表热点（频繁）参数流控规则.

ControlBehavior indicates the traffic shaping behaviour.

MetricType 表示目标度量类型。.

TrafficControllerGenFunc represents the TrafficShapingController generator function of a specific control behavior.