Sentinel核心类图

统一资源在不同上下文中的汇总统计类ClusterNode

SystemSlot

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用户滑动窗口算法实现类LeapArray

# windowLengthInMs:int# sampleCount:int# intervalInMs:int- intervalInSecond:double# array:AtomicReferenceArray<WindowWrap<T>>-updateLock：ReentrantLock

DegradeSlot

FlowSlot

- checker：FlowRuleChecker

Wrapper entity class for a period of time window.WindowWrap

- windowLengthInMs:long- windowStart:long- value：T

ProcessorSlotChain

-next：AbstractLinkedProcessorSlot

+ addFirst(AbstractLinkedProcessorSlot<?> protocolProcessor)：void+ addLast(AbstractLinkedProcessorSlot<?> protocolProcessor)：void

Context

- name:String- entranceNode:DefaultNode- curEntry:Entry- origin:String- async:boolan

框架入口类CtSph

当前调用数据保存类 holds information of current invocationEntry

- OBJECTS0:Object[]- createTimestamp:long- completeTimestamp:long- curNode:Node- originNode:Node- error:Throwable- blockError:BlockException- resourceWrapper:ResourceWrapper

具体某个资源统计类DefaultNode

- id：ResourceWrapper- childList：Set<Node>- clusterNode：ClusterNode

+ getChildList()：Set<Node>

核心类

总结：1、数据如何存储2、数据如何计算

滑动窗口支持接口<<Interface>>OccupySupport

测量桶MetricBucket

- counters:LongAdder[]- minRt:long

资源实时统计类StatisticNode

- rollingCounterInSecond：Metric- rollingCounterInMinute：Metric

-first：AbstractLinkedProcessorSlot-end：AbstractLinkedProcessorSlot

AuthoritySlot

AbstractLinkedProcessorSlot

ClusterBuilderSlot

资源的流控数据存储以及统计

资源实施统计接口<<Interface>>Node

统计类ArrayMetric

- data:LeapArray<MetricBucket>

success():longmaxSuccess():longexception()：long....

OccupiableBucketLeapArray

<<Interface>>ProcessorSlot

<<Interface>>Sph

代表一个上下文里面的所有资源统计EntranceNode

Map里存放的是Context的EntranceNode，包含子Node(DefaultNode)

统计SlotStatisticSlot

<<Interface>>SphResourceTypeSupport

消息具体流控设计（调用链设计模式）

入口Client

<<Interface>>Metric

success():longmaxSuccess():longexception()：long...

BucketLeapArray