BlogJava-Skynet-随笔分类-AOP

spring 与 hibernate 整合(事务)

G_G — Fri, 09 May 2008 05:47:00 GMT

参考：第 9 章事务管理 - Spring Framework reference 2.0.5 参考手册中文版
http://doc.javanb.com/spring-framework-reference-zh-2-0-5/ch09.html

先从配置文件开始：
源码：springAop.rar

需要jar

xml version="1.0" encoding="UTF-8"?>
<classpath>
    <classpathentry kind="src" path="java"/>
    <classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER"/>
    <classpathentry kind="lib" path="lib/aspectjrt.jar"/>
    <classpathentry kind="lib" path="lib/aspectjweaver.jar"/>
    <classpathentry kind="lib" path="lib/spring.jar"/>
    <classpathentry kind="lib" path="lib/spring-sources.jar"/>
    <classpathentry kind="lib" path="lib/commons-logging-1.0.4.jar"/>
    <classpathentry kind="lib" path="lib/cglib-nodep-2.1_3.jar"/>
    <classpathentry kind="lib" path="lib/hibernate3.jar"/>
    <classpathentry kind="lib" path="lib/log4j-1.2.11.jar"/>
    <classpathentry kind="con" path="org.eclipse.jdt.junit.JUNIT_CONTAINER/4"/>
    <classpathentry kind="lib" path="lib/dom4j-1.6.1.jar"/>
    <classpathentry kind="lib" path="lib/commons-collections-2.1.1.jar"/>
    <classpathentry kind="lib" path="lib/mysql.jar"/>
    <classpathentry kind="lib" path="lib/jta.jar"/>
    <classpathentry kind="lib" path="lib/antlr-2.7.6.jar"/>
    <classpathentry kind="output" path="bin"/>
classpath>

spring 配置

xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xmlns:aop="http://www.springframework.org/schema/aop"
       xmlns:tx="http://www.springframework.org/schema/tx"
       xsi:schemaLocation="
       http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.0.xsd
       http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-2.0.xsd
       http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-2.0.xsd">



  <bean id="beanDao" class="dao.imp.BeanDaoImp">
      <property name="sessionFactory">
          <ref bean="sessionFactory">ref>
      property>
  bean>



   <bean id="sessionFactory"
        class="org.springframework.orm.hibernate3.LocalSessionFactoryBean">

       <property name="configLocation" value="classpath:hibernate.cfg.xml" />
   bean>


   <aop:config>

         <aop:pointcut id="aopBean" expression="execution(* *.*.*(..))"/>
           <aop:advisor advice-ref="txAdvice" pointcut-ref="aopBean" />
      aop:config>


       <bean id="txManager" class="org.springframework.orm.hibernate3.HibernateTransactionManager">
      <property name="sessionFactory" ref="sessionFactory" />
    bean>


      <tx:advice id="txAdvice" transaction-manager="txManager">
           <tx:attributes>
             <tx:method name="get*" read-only="true"/>
          <tx:method name="*" />
        tx:attributes>
      tx:advice>

beans>

hibernate 配置

xml version="1.0" encoding="UTF-8"?>
DOCTYPE hibernate-configuration PUBLIC
        "-//Hibernate/Hibernate Configuration DTD 3.0//EN"
        "http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd">
<hibernate-configuration>
<session-factory name="asdf">
    <property name="hibernate.dialect">mysqlproperty>
    <property name="myeclipse.connection.profile">
        com.mysql.jdbc.Driver
    property>
    <property name="connection.url">
        jdbc:mysql://localhost/aop
    property>
    <property name="show_sql">trueproperty>

    <property name="connection.username">rootproperty>
    <property name="connection.password">property>
    <property name="connection.driver_class">
        com.mysql.jdbc.Driver
    property>
    <property name="dialect">
        org.hibernate.dialect.MySQLDialect
    property>

    <mapping resource="bean/UnitBean.hbm.xml" />

session-factory>
hibernate-configuration>

dao 类（接口）

package dao.imp;

import java.util.List;

import org.springframework.orm.hibernate3.support.HibernateDaoSupport;

import bean.UnitBean;

import dao.BeanDao;

public class BeanDaoImp extends HibernateDaoSupport implements BeanDao{
    public void addBean(UnitBean unitBean) {
        this.getHibernateTemplate().save(unitBean);
    }

    public List<UnitBean> getBeanByAll() {
        return this.getHibernateTemplate().find(" from "+UnitBean.class.getName());
    }

    public void removeBean(long beanId) {
        this.getHibernateTemplate().delete(
                getHibernateTemplate().get(UnitBean.class, beanId)
            );
    }

}

Main 类

package unit;

import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

import dao.BeanDao;
import bean.UnitBean;

public class Main {
    public static void main(String[] args) {
           ApplicationContext ctx = new ClassPathXmlApplicationContext("beans.xml");
           BeanDao dao = (BeanDao) ctx.getBean("beanDao");
           UnitBean bean = new UnitBean();
           bean.setName("xx");
           bean.setPass("11");
           dao.addBean(bean);

           for(UnitBean unitBean : dao.getBeanByAll() ){
               System.out.println( unitBean.getId() );
           }

           dao.removeBean(bean.getId());

    }
}

结果：
Hibernate: insert into bean (name, pass) values (?, ?)
Hibernate: select unitbean0_.id as id0_, unitbean0_.name as name0_, unitbean0_.pass as pass0_ from bean unitbean0_
1
Hibernate: select unitbean0_.id as id0_0_, unitbean0_.name as name0_0_, unitbean0_.pass as pass0_0_ from bean unitbean0_ where unitbean0_.id=?
Hibernate: delete from bean where id=?

G_G 2008-05-09 13:47 发表评论

spring AspectJ 基本使用

G_G — Thu, 08 May 2008 02:08:00 GMT

我的aop 基础

AOP(3)

spring 实际使用（这就使用一个例子说明）

测试类以及结果：

package unit;

import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

import bean.HelloService;

public class Main {
    public static void main(String[] args) {
           ApplicationContext context = new ClassPathXmlApplicationContext(
                   "beans.xml");
           HelloService service = (HelloService) context.getBean("helloService");
           service.annotationAop();

           System.out.println();

           service.xmlAop();

    }
}
结果：
annotationAop//正常方法运行
aop--AspectJ! //annotation拦截

xmlAop //正常方法运行
aop--XmlAop! //配置拦截

use jar

--aspectjrt.jar
--aspectjweaver.jar
--acglib-nodep-2.1_3.jar
--commons-logging.jar
--spring.jar
--spring-aspects.jar

XML配置

<beans xmlns="http://www.springframework.org/schema/beans"
            xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
            xmlns:aop="http://www.springframework.org/schema/aop"
               xsi:schemaLocation=
                   "http://www.springframework.org/schema/beans
                   http://www.springframework.org/schema/beans/spring-beans.xsd
                   http://www.springframework.org/schema/aop
                   http://www.springframework.org/schema/aop/spring-aop.xsd">


        <bean id="helloService"
            class="bean.HelloService"/>



        <bean id="xmlAop"
            class="aop.AnnotationAspectJ"/>
        <aop:aspectj-autoproxy/>



        <bean id="XmlAspectJ"
            class="aop.XmlAspectJ"/>
        <aop:config>
             <aop:aspect ref="XmlAspectJ">
                 <aop:pointcut id="mainMethod" expression="execution(* xmlAop(..))"/>
                 <aop:after-returning pointcut-ref="mainMethod" method="goXmlAop"/>
             aop:aspect>
         aop:config>

beans>

HelloService.java

package bean;

public class HelloService {
    public void annotationAop() {
        System.out.println(" annotationAop ");
    }

    public void xmlAop(){
        System.out.println(" xmlAop ");
    }
}

AnnotationAspectJ.java

package aop;

import org.aspectj.lang.annotation.AfterReturning;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Pointcut;

@Aspect
public class AnnotationAspectJ {
    @Pointcut("execution(* annotationAop(..))")
    public void mainMethod() {}

    @AfterReturning("mainMethod()")
    public void sayHello() {
        System.out.println("aop--AspectJ!");
    }
}

XmlAspectJ.java

package aop;

public class XmlAspectJ {
    public void goXmlAop(){
        System.out.println(" aop--XmlAop! ");
    }
}

G_G 2008-05-08 10:08 发表评论

CGLib 学习

G_G — Mon, 05 Nov 2007 02:22:00 GMT

看hbn 源代码发现用了 CGlib 这就看看这个jar 。特留个文 ^_^(转）http://www.nirvanastudio.org/java/cglib-%E6%8C%87%E5%8D%97.html

CGlib 就2个例能说明一切
先是使用类

public class MyClass {

    public void method() {
        System.out.println("MyClass.method()");
    }

    public void method2() {
        System.out.println("MyClass.method2()");
    }
}

例1：

import java.lang.reflect.Method;

import net.sf.cglib.proxy.Enhancer;
import net.sf.cglib.proxy.MethodProxy;
import net.sf.cglib.proxy.MethodInterceptor;

public class Main {

    public static void main(String[] args) {

        Enhancer enhancer = new Enhancer();

        //在这代理了
        enhancer.setSuperclass(MyClass.class);
        enhancer.setCallback( new MethodInterceptorImpl() );

        // 创造代理（动态扩展了MyClass类）
        MyClass my = (MyClass)enhancer.create();

        my.method();
    }

    private static class MethodInterceptorImpl implements MethodInterceptor {

        public Object intercept(Object obj,
                                Method method,
                                Object[] args,
                                MethodProxy proxy) throws Throwable {

            System.out.println(method);

            proxy.invokeSuper(obj, args);

            return null;
        }
    }
}

例2：

import java.lang.reflect.Method;

import net.sf.cglib.proxy.Enhancer;
import net.sf.cglib.proxy.MethodProxy;
import net.sf.cglib.proxy.MethodInterceptor;
import net.sf.cglib.proxy.NoOp;
import net.sf.cglib.proxy.Callback;
import net.sf.cglib.proxy.CallbackFilter;

public class Main2 {

    public static void main(String[] args) {

        Callback[] callbacks =
            new Callback[] { new MethodInterceptorImpl(),  NoOp.INSTANCE };

        Enhancer enhancer = new Enhancer();

        enhancer.setSuperclass(MyClass.class);
        enhancer.setCallbacks( callbacks );
        //添加方法过滤器返回1为不运行 2 为运行
        enhancer.setCallbackFilter( new CallbackFilterImpl() );

        MyClass my = (MyClass)enhancer.create();

        my.method();
        my.method2();
    }

    private static class CallbackFilterImpl implements CallbackFilter {

        public int accept(Method method) {

            if ( method.getName().equals("method2") ) {
                return 1;

            } else {
                return 0;
            }
        }
    }

    private static class MethodInterceptorImpl implements MethodInterceptor {

        public Object intercept(Object obj,
                                Method method,
                                Object[] args,
                                MethodProxy proxy) throws Throwable {

            System.out.println(method);

            return proxy.invokeSuper(obj, args);
        }
    }
}

简单不哈哈比jdk 中的动态代理好用，那还要接口不太方便。

G_G 2007-11-05 10:22 发表评论

AOP 学习笔记

G_G — Thu, 18 Oct 2007 10:16:00 GMT

如有错误大家多指教

1.call(* *(..)) 和 execution(* *(..)) 区别
call 和 execution 都为切面限定
execution 进行切面添加只能在方法定义的开始和结束。如：
   >>>AOP 添加
    public String getName(){
        System.out.println("G_G");
        return this.name ;
    }
   >>>AOP 添加
call进行切面添加没有限定。如：
    >>>AOP 添加
    public String getName(){
          >>>AOP 添加
        System.out.println("G_G");
          >>>AOP 添加
        return this.name ;
    }
   >>>AOP 添加

     2.this 和within的区别
   都为范围限定作用，如： within(Demo) && execution( * *(..)) 在类Demo中的所有..
   区别是：this不能切静态,within没有

3.cflow的作用
我们从 1>cflow( within(DD+) && execution( * *(..)) ) 和
         2>within(DD+) && execution( * *(..)) 的区别来看
1与2的对比是在2的切入点下再加 aj 文件的方法进行添加切入点。

4.方法添加
如：Introduction Example例中的 CloneablePoint.aj
     Point类继承Clonable 添加 clone() 方法

   declare parents: Point implements Cloneable;

   public Object Point.clone() throws CloneNotSupportedException {
      return super.clone();
   }

   point.clone()....

G_G 2007-10-18 18:16 发表评论

我的AOP学习(AspectJ)

G_G — Mon, 15 Oct 2007 08:57:00 GMT

学习拥有连贯
在我刚认识让 java 动态这种动态编译动态加载的几天后
对我一向不懂的 AOP 特别是 AspectJ 开窍了（哈哈那感觉好啊^_^）
下面我写出我刚对AOP的一些小练

1。目的
DAO中大量的 session的开和闭不紧使代码成倍加，还及容易出错
用设计模式 hibernate 包装下大家好象有点接受不了（@_@!）
AOP就进入我的视线但总没个切入点

2。原理
其实让 java 动态就是那点东西但IBM 包出个好用的框架来。

3。代码说明

//*******************Dao.java ****************************
package tt;
//为了简单 session 看成是真的session 哈 ^_^
public class Dao {
    public String session = "close" ;

    public void testDao(){
        System.out.println( "testDao in function : "+ session);
    }

    static public void main(String[]args){
        Dao dao = new Dao() ;
        dao.testDao();
        System.out.println("main in function : " +  dao.session);
    }
}

//*****************List.aj ****************************
package tt;

public aspect List {
    //切点范围声明（Dao.testDao 归 readOnly切点管）
    pointcut readOnly(Dao dao):execution(* *Dao.testDao*(..))&&this(dao);

    //挂载 readOnly 开始方法
     before(Dao dao) :  readOnly(dao) {
             openSession(dao);
      }
     //挂载 readOnly 结束方法
     after(Dao dao) returning()  :  readOnly(dao) {
          close(dao);
     }

     // readOnly 方法运行代码（到这可以大胆的写 java 代码了）。。。。
     private void openSession(Dao dao) {
         if(dao.session.equals("close"))
             dao.session = "Session Open";
     }
     private void close(Dao dao) {
         dao.session = "close" ;
     }
}

4。结果：
testDao in function : Session Open
main in function : close

4。后续
AspectJ 使 AOP 简单
可能还会统一标准
能为我们的java 框架灵活更上一层（期待）

G_G 2007-10-15 16:57 发表评论