Package org.miaixz.bus.core.lang.selector

Class SmoothWeightSelector<T>

java.lang.Object
org.miaixz.bus.core.lang.selector.SmoothWeightSelector<T>
Type Parameters:
T - 对象类型
All Implemented Interfaces:
Selector<T>
public class SmoothWeightSelector<T> extends Object implements Selector<T>
平滑加权轮询选择器 思路: 比如 A : 5 , B : 3 , C : 2 (服务器 A,B,C 对应权重分别是 5,3,2) ip: A,B,C weight: 5,3,2 (计算得到 totalWeight = 10) currentWeight: 0,0,0 (当前ip的初始权重都为0) 
 请求次数: |  currentWeight = currentWeight + weight  |  最大权重为  |  返回的ip为 |  最大的权重 - totalWeight,其余不变
      1   |           5,3,2    (0,0,0 + 5,3,2)       |     5      |      A     |      -5,3,2
      2   |           0,6,4    (-5,3,2 + 5,3,2)      |     6      |      B     |       0,-4,4
      3   |           5,-1,6    (0,-4,4 + 5,3,2)     |     6      |     C      |       5,-1,-4
      4   |          10,2,-2    (5,-1,-4 + 5,3,2)    |     10     |     A      |       0,2,-2
      5   |           5,5,0                          |     5      |     A      |       -5,5,0
      6   |           0,8,2                          |     8      |     B      |       0,-2,2
      7   |           5,1,4                          |     5      |     A      |       -5,1,4
      8   |           0,4,6                          |     6      |     C      |       0,4,-4
      9   |           5,7,-2                         |     7      |     B      |       5,-3,-2
      10  |           10,0,0                         |     10     |     A      |        0,0,0
至此结束: 可以看到负载轮询的策略是: A,B,C,A,A,B,A,C,B,A,
Since:
Java 17+
Author:
Kimi Liu

  • Constructor Details

    • SmoothWeightSelector

      public SmoothWeightSelector()
      构造

    • SmoothWeightSelector

      public SmoothWeightSelector(Iterable<? extends WeightObject<T>> weightObjList)
      构造
      Parameters:
      weightObjList - 权重对象列表

  • Method Details

    • of

      public static <T> SmoothWeightSelector<T> of()
      创建平滑加权获取器
      Type Parameters:
      T - 对象类型
      Returns:
      SmoothSelector

    • add

      public SmoothWeightSelector<T> add(T obj, int weight)
      增加对象
      Parameters:
      obj - 对象
      weight - 权重
      Returns:
      this

    • add

      public SmoothWeightSelector<T> add(WeightObject<T> weightObj)
      增加权重对象
      Parameters:
      weightObj - 权重对象
      Returns:
      this

    • select

      public T select()
      通过平滑加权方法获取列表中的当前对象
      Specified by:
      select in interface Selector<T>
      Returns:
      选中的对象