google Dapper自己实现Demo

import java.util.ArrayList;  
import java.util.List;  
  
  
public class Test {  
  
    //idWorker就是为了生成一个唯一的id 
    private static SnowflakeIdWorker idWorker = new SnowflakeIdWorker(0, 0);  
    private static List list = new ArrayList();  
      
    public static void main(String[] args) {  
        long traceID =idWorker.nextId();   
        long spanID =idWorker.nextId();  
        MessageVO vo = new MessageVO("main方法开始了……", traceID, -1L, spanID);  
        list.add(vo);  
        doA(traceID,spanID);  
        doB(traceID,spanID);  
          
        treeMenuList(-1L,0);  
    }  
      
    public static void treeMenuList(Long pid,int d){   
        int tmp =0;  
        for(MessageVO mu: list){    
            //遍历出父id等于参数的id   
            if(mu.getpID().equals(pid)){  
                 for(int i=0;i

public class MessageVO {  
    private String messg; //内容  
    private Long traceID; //全局唯一的 TraceID  
    private Long pID; //上级id  
    private Long spanID; //全局唯一的 SpanID  
      
      
    public MessageVO() {  
          
    }  
  
  
    public MessageVO(String messg, Long traceID, Long pID, Long spanID) {  
        this.messg = messg;  
        this.traceID = traceID;  
        this.pID = pID;  
        this.spanID = spanID;  
    }  
  
  
    public String getMessg() {  
        return messg;  
    }  
  
  
    public void setMessg(String messg) {  
        this.messg = messg;  
    }  
  
  
    public Long getTraceID() {  
        return traceID;  
    }  
  
  
    public void setTraceID(Long traceID) {  
        this.traceID = traceID;  
    }  
  
  
    public Long getpID() {  
        return pID;  
    }  
  
  
    public void setpID(Long pID) {  
        this.pID = pID;  
    }  
  
  
    public Long getSpanID() {  
        return spanID;  
    }  
  
  
    public void setSpanID(Long spanID) {  
        this.spanID = spanID;  
    }  
  
  
    @Override  
    public String toString() {  
        return  messg;  
    }  
      
      
}  

运行结果如下：

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