Question

我听说过很多关于阿卡的好事。我有一个价格流，我需要创建两个移动平均价格。最后我有一个策略来监听这些信号=＆gt;价格，移动平均价格1和移动平均价格2并作出一些决定。

我通过演员实现了这个，但不幸的是我遇到了订单问题，a）我不知道如何为生成的消息或事件指定时间戳或优先级顺序。

public static void main(String[] args) {  
    String[] array1 = 
            {"15", "1", "D1", "Wine",       "1", "0", 
             "15", "3", "D3", "Tap water",  "2", "2",
             "15", "1", "M1", "Fish",       "3", "0",
             "9", "5", "D4", "Coffee",     "2", "2",
             "9", "2", "P2", "Cake",       "2", "1" 
            };
    List<String> list = Arrays.asList(array1);
    Comparator<List<String>> comparator = new Comparator<List<String>>(){
        @Override
        public int compare(List<String>a1, List<String> a2) {
            return Integer.valueOf(a1.get(1)).compareTo(Integer.valueOf(a2.get(1)));
        }
    };
    int lineLength=6;
    System.out.println(list.toString());
    bubbleSort(list,lineLength,comparator);
    System.out.println(list.toString());
}
//classic bubble-sort algorithm
public static void bubbleSort(List<String> list,int lineLength,Comparator<List<String>> comparator){
    int numRow=list.size()/lineLength;
    for(int i=0;i<numRow;i++){
        for(int j=i+1;j<numRow;j++){
            List<String> extractArrayI = extractArray(list, i, lineLength);
            List<String> extractArrayJ = extractArray(list, j, lineLength);
            if(comparator.compare(extractArrayI, extractArrayJ)>0){
                swichLines(list,i,j,lineLength);
            }
        }
    }
}
//extract i-th row
public static List<String> extractArray(List<String> list,int i, int lineLength){
    return list.subList(i*lineLength, i*lineLength+lineLength);
}
//Switch line i,j
public static void swichLines(List<String>list,int i, int j,int lineLength){
    List<String>tempI = new ArrayList<String>(list.subList(i*lineLength, i*lineLength+lineLength));
    List<String>tempJ = new ArrayList<String>(list.subList(j*lineLength, j*lineLength+lineLength));
    replaceSublist(list,tempJ,i,lineLength);
    replaceSublist(list,tempI,j,lineLength);
}
//replace sublist
private static void replaceSublist(List<String> list, List<String> temp, int line, int lineLength) {
    for (int k=0; k<lineLength; k++)
    {
        list.set(line*lineLength+k, temp.get(k));
    }
}

其中PriceEvent是一个带有字符串id和double值的简单类。移动平均线收听价格并计算移动平均线并每次创建一个新的PriceEvent。

策略会监听所有这些PriceEvent，并使用它们的ID可以区分它们。

Akka，优先订单活动

0 个答案: