java主从表事务控制(EJB3.0解决方法)

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主从表事务控制解决方法EJB3.0
author:chinayaosir
QQ:44633197  QQ Group:8284865,34610648
blog http://blog.csdn.net/chinayaosir

0.事务一致性控制解释:
银行卡转帐操作事务:
用户从张三帐号1111222333444转帐8000.00到李四帐号2222333344445555!
步骤如下:
0.1验证张三密码和帐号正确!
0.2验证李四帐号2222333344445555输入正确！
0.3张三输入转帐金额8000.00!
0.4计算手续费4.00
0.5验证张三帐号余额>=8000.00+4.00

0.6李四帐号2222333344445555加上8000.00
0.7张三帐号1111222333444减去8004.00

0.8事务控制
0.6到0.7共2步没有任何错误，则转帐成功[提交事务]！
0.6到0.7共2步   有任何错误，则转帐失败[回滚事务]！
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1.主表和从表事务控制要求

假设主表只有一行数据，而从表有1到n行数据！
当我们一起保存或者删除主表和从表,事务要求如下:
1.1.Create/Update事务要求
  如果主表Create/Update失败而从表Create/Update成功;
  或者主表Create/Update成功而从表Create/Update失败.
  则整个事务都回滚，结果是主从表保存失败，达到事务控制要求.
  打个比方：完成一件事情要经过A->B->C->D->E->F共6步，
            如果6步中有一步出错, 则Create/Update成功的部分被事务回滚强制取消;
            如果6步中没有一步出错,则mCreate/Update成功，则事务提交!

1.2.delete事务要求
  如果主表delete失败而从表delete成功;
  或者主表delete成功而从表delete失败.
  则整个事务都回滚，结果是主从表delete失败，达到事务控制要求.

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2.主表和从表事务控制EJB客户调用方法
2.1Create/update调用:spdaotrans.SaveWithTransation(sphead, splist);
sphead=主表,1行记录(最多只能输入一条)
splist=从表,2行记录(可以输入1-N条,N属于自然数)

2.2Delete调用:spdaotrans.DeleteWithTransation("PB100563");
"PB100563"=主从表都使用的一个关键字PK,
DeleteWithTransation()方法由1-2-3步删除数据构成一个整体事务!

2.3源码参考
package com;
//import java basic package
import java.util.*;
import java.lang.String;
import java.text.SimpleDateFormat;
import javax.naming.InitialContext;

//import entity and service package
import shipping.entity.*;
import shipping.shippingDAO.spDAOTransRemote;

public class testTransation {
    public static void main(String[] args) {
        //************************begin************************************   
        try {
            //1.InitialContext and get spDAOTrans object
            InitialContext ctx = JNDIContext.getInitContextByRemote();
            spDAOTransRemote spdaotrans=(spDAOTransRemote)ctx.lookup("spDAOTrans/remote");
            //************************************************************       
            //2.Save  with transation test value=OK
            //SaveWithTransation(SSpMaster m,List<SSpDetail> d )
            System.out.println("SaveWithTransation(SSpMaster m,List<SSpDetail> d )");
            System.out.println("fill SSpMaster data");   
            //2.1fill SSpMaster
            SSpMaster sphead=new SSpMaster();   
            SSpMasterId spheadpk=new SSpMasterId();
            spheadpk.setPsonumber("PB100563");
            spheadpk.setSubcustom("0000000000");
            String s1="10/29/2010",s2="10/25/2010",s3="10/30/2010";
            SimpleDateFormat   sdf =  new SimpleDateFormat("MM/dd/yyyy");  
            Date d1=sdf.parse(s1);
            Date d2=sdf.parse(s2);
            Date d3=sdf.parse(s3);       

            sphead.setId(spheadpk);       
            sphead.setPshipDate(d1);
            sphead.setShippDate(d2);
            sphead.setShip2Date(d3);
            sphead.setCustomerid("B.A.B.");                           
            sphead.setDestinatio("COLUMBUS, OHIO");
            sphead.setCustofPoe("LONG BEACH");
            sphead.setId(spheadpk);           

            //2.2fill SSpDetail list
            System.out.println("fill SSpDetail data");   
   
            SSpDetailId spdetailpk1=new SSpDetailId();       
            SSpDetail spdetail1=new SSpDetail();   
            SSpDetailId spdetailpk2=new SSpDetailId();   
            SSpDetail spdetail2=new SSpDetail();
            ArrayList<SSpDetail> splist = new ArrayList<SSpDetail>();
           
            String sdate="10/25/2010";
            SimpleDateFormat   sdfDetail =  new SimpleDateFormat("MM/dd/yyyy");  
            Date d_shipdate=sdfDetail.parse(sdate);
            //2.3fill spdetailpk data
            spdetailpk1.setShippDate(d_shipdate);
            spdetailpk1.setPsonumber("PB100563");
            spdetailpk1.setOcNumber("B1000577");
            spdetailpk1.setItemnumber("BY34317");   
            spdetailpk1.setSubcustome("B.A.B./OH");       
   
            //2.4fill spdetail1 data
            spdetail1.setId(spdetailpk1);   
            spdetail1.setCustomerid("B.A.B.");   
            spdetail1.setItemofname("C.P.O #");
            spdetail1.setItemofpono("1006944");
            spdetail1.setLoadofname("P.O.#");
            spdetail1.setLoadofpono("1006944");
            Long qty1=new Long(3708);
            spdetail1.setLoadqtyinp(qty1);
            spdetail1.setOrdercqty(qty1);       
   
            //2.5fill spdetail2 data               
            spdetailpk2.setShippDate(d_shipdate);
            spdetailpk2.setPsonumber("PB100563");
            spdetailpk2.setOcNumber("B1000578");
            spdetailpk2.setItemnumber("BY34318");   
            spdetailpk2.setSubcustome("B.A.B./OH");       
           
            Long qty2=new Long(17208);
            spdetail2.setId(spdetailpk2);
            spdetail2.setLoadqtyinp(qty2);
            spdetail2.setOrdercqty(qty2);   
            spdetail2.setCustomerid("B.A.B.");   
            spdetail2.setItemofname("C.P.O #");
            spdetail2.setItemofpono("1006944");
            spdetail2.setLoadofname("P.O.#");
            spdetail2.setLoadofpono("1006944");
            //2.5.add spdetail1,spdetail2 into splist

            splist.add(spdetail1);//insert 1 row
            splist.add(spdetail2);//insert 2 row
            //2.6.主从表一起保存(包含对三个表的操作)
            spdaotrans.SaveWithTransation(sphead, splist);
           
            //************************************************************   
            //3.Delete with transation
            //DeleteWithTransation(String sp)
            System.out.println("DeleteWithTransation(sp)");   
            //主从表一起删除包含对三个表的操作       
            spdaotrans.DeleteWithTransation("PB100563");
           
            //************************************************************               
            //4.spNumber Create,Retrieve,Update,Delete
            //spNumber Create test value=>ok   
            System.out.println("getspNumber()");
            spdaotrans.spNumberGet();    //create spnumber with database procedure
           
               
        } catch (Exception e) {
           
            e.printStackTrace();
        }//end try
        //************************end************************************           
    }//end main

}//end class


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3.主表和从表事务控制EJB实现方法
EJB3.0事务控制标注:
3.1用@TransactionAttribute(NOT_SUPPORTED)标注整个类spDAOTrans不支持事务,代码如下:
@TransactionAttribute(NOT_SUPPORTED)
public class spDAOTrans implements spDAOTransRemote

3.2用@TransactionAttribute(REQUIRED)标注save方法支持事务,代码如下:
@TransactionAttribute
public void SaveWithTransation(SSpMaster m,List<SSpDetail> d )

3.3用@TransactionAttribute(REQUIRED)标注delete方法支持事务,代码如下:
@TransactionAttribute(REQUIRED)   
public void DeleteWithTransation(String sp)

3.4完整源码如下!

package shipping.shippingDAO;

//import java basic package
import java.util.Date;
import java.util.Iterator;
import java.util.List;
//import ejb3.0
import javax.ejb.Stateless;
import javax.ejb.TransactionAttribute;
import javax.persistence.EntityManager;
import javax.persistence.PersistenceContext;
import javax.persistence.Query;
import static javax.ejb.TransactionAttributeType.*;

//import entity and util package
import shipping.entity.*;
import publicUtility.LogUtil;
import java.util.logging.Level;
@Stateless
@TransactionAttribute(NOT_SUPPORTED)
public class spDAOTrans implements spDAOTransRemote {
    @PersistenceContext
    private EntityManager em;   

    @TransactionAttribute(REQUIRED)
    public void SaveWithTransation(SSpMaster m,List<SSpDetail> d ){
        try{
        String sp=m.getId().getPsonumber();
        spMasterSave(m);            //1.save master   
        spDetailDelete(sp);            //2.delete  history data   
        Iterator isp = d.iterator();    //3.save detail    list
        while(isp.hasNext()){
            SSpDetail echo_d = (SSpDetail)isp.next();
            spDetailSave(echo_d);
        }   
        spNumberChgFlag(sp,"1");        //4.update psnumber flag
       
        }catch(Exception e){
            System.out.println("Transation fail!");
        }
    }
    @TransactionAttribute(REQUIRED)   
    public void DeleteWithTransation(String sp){
        try{
        spMasterDelete(sp);            //1.delete master   
        spDetailDelete(sp);            //2.delete detail       
        spNumberChgFlag(sp,"0");        //3.update spnumber flag
        }catch(Exception e){
            System.out.println("Transation fail!");
        }       
    }
   
    //SpMaster save,delete,find
    //SpMaster save

    private void spMasterSave(SSpMaster entity) {
        LogUtil.log(" spMasterSave(SSpMaster entity)" , Level.INFO,null);
        try {
            SSpMasterId id=new SSpMasterId();
            id.setPsonumber(entity.getId().getPsonumber());
            id.setSubcustom(entity.getId().getSubcustom());
            SSpMaster instance = em.find(SSpMaster.class, id);
            if (instance!=null){//存在则修改
                instance.setBlSooffcr(entity.getBlSooffcr());   
                instance.setBoatclose(entity.getBoatclose());
                instance.setCustofPoe(entity.getCustofPoe());
                instance.setCustomerid(entity.getCustomerid());
                instance.setDestinatio(entity.getDestinatio());
                instance.setRevisedate(entity.getRevisedate());
                instance.setPshipDate(entity.getPshipDate());
                instance.setShip2Date(entity.getShip2Date());
                instance.setShippDate(entity.getShippDate());   
                instance.setSopsoFlag(entity.getSopsoFlag());
                em.merge(instance);
            }
            else{//不存在则插入
                em.persist(entity);
            }               
           
        } catch (RuntimeException re) {
            LogUtil.log("spMasterSave() failed", Level.SEVERE, re);
            throw re;
        }

    }
    //SpMaster delete
    private void spMasterDelete(String sp) {
        LogUtil.log("spMasterDelete(String sp)" , Level.INFO,null);   
        try {
            Query query=em.createQuery("DELETE FROM SSpMaster c WHERE c.id.psonumber=:sp");
            query.setParameter("sp",sp);
            query.executeUpdate();                   
        } catch (RuntimeException re) {
            LogUtil.log("spMasterDelete() failed", Level.SEVERE, re);
            throw re;
        }

    }   

    //SpDetail save,delete,find   
    //SpDetail save
    private void spDetailSave(SSpDetail entity) {
        LogUtil.log("void spDetailSave(SSpDetail entity)" , Level.INFO,null);
        try {
            SSpDetailId id=new SSpDetailId();
            id.setItemnumber(entity.getId().getItemnumber());
            id.setOcNumber(entity.getId().getOcNumber());
            id.setPsonumber(entity.getId().getPsonumber());
            id.setShippDate(entity.getId().getShippDate());
            id.setSubcustome(entity.getId().getSubcustome());
            SSpDetail instance = em.find(SSpDetail.class, id);
            if (instance!=null){//存在则修改
                instance.setCustomcode(entity.getCustomcode());
                instance.setCustomerid(entity.getCustomerid())    ;
                instance.setItemofname(entity.getItemofname());
                instance.setItemofpono(entity.getItemofpono());
                instance.setLoadofname(entity.getLoadofname());
                instance.setLoadofpono(entity.getLoadofpono());
                instance.setLoadqtyinp(entity.getLoadqtyinp());
                instance.setOrdercqty(entity.getOrdercqty());
                instance.setSopsoFlag(entity.getSopsoFlag());
                em.merge(instance);
            }
            else{//不存在则插入
                em.persist(entity);       
            }
        } catch (RuntimeException re) {
            LogUtil.log("spDetailSave() failed", Level.SEVERE, re);
            throw re;
        }

    }
    //SpDetail delete
    private void spDetailDelete(String sp) {
        LogUtil.log("spDetailDelete(String sp) " , Level.INFO,null);   
        try {
            Query query=em.createQuery("delete from SSpDetail where psonumber=:sp");
            query.setParameter("sp",sp);
            query.executeUpdate();
           
        } catch (RuntimeException re) {
            LogUtil.log("spDetailDelete() failed", Level.SEVERE, re);
            throw re;
        }

    }

    //spNumber create,update,find
    //spNumber create
    @TransactionAttribute(REQUIRED)   
    public void spNumberGet() {
        LogUtil.log("void spNumberGet()", Level.INFO,null);
        try {
            Query query=em.createNativeQuery("{call get_sp_number()}");
            query.executeUpdate();
        }
        catch (RuntimeException re) {
            LogUtil.log("spNumberGet() failed", Level.SEVERE, re);
            throw re;
        }
    }
    //spNumber update
    private void spNumberChgFlag(String sp, String flag) {
        LogUtil.log("spNumberChgFlag(String sp,String flag)", Level.INFO,null);
        try {
            Query query=em.createQuery("UPDATE SSpNumber c " +
                    "SET c.flag=:flag WHERE c.psonumber=:sp");           
            query.setParameter("flag",flag);
            query.setParameter("sp",sp);
            query.executeUpdate();           
        } catch (RuntimeException re) {
            LogUtil.log("spNumberChgFlag() failed", Level.SEVERE, re);
            throw re;
        }

    }

}