java-解决业务操可能数据冲突问题

  问题提出,由于业务会出现多人同时操作,或者业务人员反复的操作,因此在业务流程中,需要对业务操作数据进行保护,由于使用数据库锁可能会引起一些难以预料的问题,因此考虑使用内存锁,设计思想:在内存中使用一个静态的链表,即时的对业务操作进行响应,类似于中断机制。在这个过程中需要考虑使用单例。具体看代码:

 1 import java.util.LinkedList;
 2 
 3 /**
 4  * 
 5  * Description:<p></p>  
 6  * @author: JanneLeMac@gmail.com
 7  * @version: 2013-9-14 下午10:14:47
 8  */
 9 public class SendHelper {
10     private static LinkedList<String> sendItem=null;
11     private static volatile SendHelper M_INSTANCE = null;
12     /** 
13      * Description: <p>use private make sure the SendHelper is unique. </p> 
14      */
15     private SendHelper(){};
16     
17     public static SendHelper getInstance(){
18         if(null == M_INSTANCE){//if null
19             synchronized (SendHelper.class) {//if more than two threads run into the first null check same time 
20                 //to avoid instanced more than one time, it needs to be checked again.
21                 if(null == M_INSTANCE){
22                     M_INSTANCE = new SendHelper();
23                     sendItem=new LinkedList<String>();
24                 }
25             }
26         }
27         return M_INSTANCE;
28     }
29     public LinkedList<String> getSendItem() {
30         return sendItem;
31     }
32     public void setSendItem(LinkedList<String> sendItem) {
33         SendHelper.sendItem = sendItem;
34     }
35     public void addItem(String LSH){
36         sendItem.addLast(LSH);
37     }
38     public void removeItem(String LSH){
39         sendItem.remove(LSH);
40     }
41     
42     public static void main(String []args){
43         System.out.println("---------test beagin-----------");
44         //LinkedList<String> l = new LinkedList<String>();
45         //SendHelper.getInstance().setSendItem(l);
46         SendHelper.getInstance().addItem("1");
47         SendHelper.getInstance().addItem("2");
48         SendHelper.getInstance().addItem("3");
49         SendHelper.getInstance().addItem("4");
50         for(int i=0;i<SendHelper.getInstance().getSendItem().size();i++){
51             System.out.println(SendHelper.getInstance().getSendItem().get(i));
52             if("2".equals(SendHelper.getInstance().getSendItem().get(i))){
53                 SendHelper.getInstance().removeItem("4");
54             }
55         }
56         System.out.println("size:"+SendHelper.getInstance().getSendItem().size());
57         System.out.println("---------test end-----------");
58     }
59     
60     //1.业务判断,有锁,返回提示信息
61     //2.加锁
62     //3.业务操作
63     //4.移除锁
64 }

     问题解决,具体使用还得看业务系统的使用,思路就这样了,还得看系统的运行情况^_^。

posted @ 2013-09-15 22:37  alexander.bruce.lee  阅读(634)  评论(2编辑  收藏  举报