AOP

（singleton,unlimited , poolable），
public class BeanFactory {
....
private Object getBeanProxy(BeanConfiguration config)throws UtilException {
Object bean = null ;
Object proxy = null ;
TransactionDelegate delegate = null ;
String beanName = config.getImpl();
String[] interfaceNames = config.getName();
Class[] cls = new Class[interfaceNames.length] ;
try {
for (int i = 0; i < interfaceNames.length; i++) {
System.out.println("cls ="+interfaceNames);
cls = Class.forName(interfaceNames.trim()) ;
}
if (BeanConfiguration.SINGLETON.equals(config.getMethod())) {
bean = cache.getFromCache(beanName) ;
if (bean == null) {
bean = Class.forName(beanName).newInstance() ;
cache.putIntoCache(beanName , bean) ;
}
delegate = new TransactionDelegate() ;
delegate.setObject(bean) ;
proxy = Proxy.newProxyInstance(delegate.getClass().getClassLoader() ,
cls , delegate) ;
} else if (BeanConfiguration.UNLIMITED.equals(config.getMethod())) {
bean = Class.forName(beanName).newInstance() ;
delegate = new TransactionDelegate();
delegate.setObject(bean);
proxy = Proxy.newProxyInstance(delegate.getClass().getClassLoader() ,
cls , delegate);
} else if (BeanConfiguration.POOLED.equals(config.getMethod())) {
ServiceLog.debug("beanPool instance ="+beanPool);
if (beanPool == null) {
throw new UtilException("系统没有发现相应的池，不支持池管理Bean" , -1);
}
ServiceLog.info("current facade bean pool active num is ="+beanPool.currentActiveNum(beanName));
ServiceLog.info("current facade bean pool idle num is ="+beanPool.currentIdleNum(beanName));
bean = beanPool.get(beanName) ;
delegate = new TransactionDelegate() ;
delegate.setObject(bean);
ServiceLog.info("current facade bean pool size is ="+delegate);
proxy = Proxy.newProxyInstance(delegate.getClass().getClassLoader() ,
cls , delegate);
} else {
throw new UtilException("错误的池的Bean管理方式" , -1);
}
System.out.println("从池中取出的bean 为="+bean);
return proxy ;
} catch (UtilException ex) {
ex.printStackTrace();
ServiceLog.error(ex.getMessage() , ex);
throw ex ;
} catch (Exception ex) {
ex.printStackTrace();
ServiceLog.error(ex.getMessage() , ex);
throw new UtilException(ex);
}
}
......
}



package com.goldenchance.amis.framework.proxy;

import java.lang.reflect.Method;
import java.lang.reflect.InvocationHandler;
import com.goldenchance.common.framework.OperationService;
import com.goldenchance.common.exception.FacadeAccessException;
import com.goldenchance.common.util.TransactionContext;
import com.goldenchance.common.util.TransactionContextFactory;
import com.goldenchance.common.log.ServiceLog;
import java.util.*;
import java.lang.reflect.*;
/**
* 事务代理类
* <p>Title: 实时监控系统</p>
* <p>Description: 通过动态代理技术,实现事务处理的动态封装</p>
* @version 1.0
*/
public class TransactionDelegate implements InvocationHandler {
private final static List DEFAULT_METHOD_LIST = new ArrayList();
private TransactionContextFactory factory ;
private Object object;

public TransactionDelegate() {
factory = TransactionContextFactory.newFactory();
}

public void finalize() {
this.release();
}

public void release() {
object = null ;
}

/**
* 将Object对象中的方法设置为纳入默认忽略的方法集合中
*/
static {
DEFAULT_METHOD_LIST.add("equals");
DEFAULT_METHOD_LIST.add("getClass");
DEFAULT_METHOD_LIST.add("hashCode");
DEFAULT_METHOD_LIST.add("notify");
DEFAULT_METHOD_LIST.add("notifyAll");
DEFAULT_METHOD_LIST.add("toString");
DEFAULT_METHOD_LIST.add("wait");
}

/**
* 实现接口的invoke方法
* @see java.lang.reflect.InvocationHandler.invoke(Object , Method , Object[])
*/
public Object invoke(Object proxy, Method method, Object[] args) throws Throwable {
String name = method.getName() ;
Object result = null ;
ServiceLog.info("开始调用"+object.getClass().getName()+"的方法"+name);
if (DEFAULT_METHOD_LIST.contains(name)) {
result = method.invoke(object , args);
ServiceLog.info("Start : 调用"+object.getClass().getName()+"的方法"+name);
return result ;
} else if (object instanceof OperationService){
//如果代理对象是OperationService实现类,则说明它支持事务处理
OperationService serivce = (OperationService)object ;
TransactionContext tc = factory.getTransactionContext();
try {
serivce.setTransactionContext(tc);
if (name.startsWith("search")) {
//如果是查询方法,则不进行事务封装
result = method.invoke(object , args) ;
} else {
tc.beginTransaction();
try {
result = method.invoke(object , args) ;
tc.commitTransaction();
} catch (Exception ex) {
ServiceLog.error(ex.getMessage() , ex) ;
if (ex instanceof FacadeAccessException) {
FacadeAccessException actual = (FacadeAccessException) ex ;
tc.rollbackTransaction() ;
throw actual ;
}
throw ex ;
}
}
return result ;
} finally {
tc.closeConnection();
ServiceLog.info("End : 调用"+object.getClass().getName()+"的方法"+name);
}

} else {
result = method.invoke(object , args) ;
return result ;
}

}

public Object getObject() {
return object;
}

public void setObject(Object object) {
this.object = object;
}

}

 

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you ge shi cuo wu............