使用XML实现多渠道接入网站的构架(2)
其余XML则可按这样的规则来定制
五.技术实现
RouterFactory
package com.web.router;
import com.web.platform.Exception.RouterException;
import java.util.java/util/Hashtable.java.html" target="_blank">Hashtable;
/**
* Router产生和清除的类
*/
public class RouterFactory
{
/**
* Router存储的树front
*/
private static java/util/Hashtable.java.html" target="_blank">Hashtable QueuePairFront = null;
/**
* Router存储的树back
*/
private static java/util/Hashtable.java.html" target="_blank">Hashtable QueuePairBack = null;
/**
* Router存储的树
*/
private static java/util/Hashtable.java.html" target="_blank">Hashtable QueueRouter = null;
/**
* 返回的XMLRouter
*/
public static XMLRouter instance = null;
/**
* Router的定义
*/
public static RouterDefine routerdefine = null;
/**
* Router的ID号
*/
public static long routeIndex = 0;
/**
* @roseuid 3F169C21027C
*/
public RouterFactory()
{
}
/**
* 初始化Hashtable和Vector
*/
public static void initFactory() throws java/lang/Exception.java.html" target="_blank">Exception
{
QueuePairFront = new java/util/Hashtable.java.html" target="_blank">Hashtable();
QueuePairBack = new java/util/Hashtable.java.html" target="_blank">Hashtable();
QueueRouter = new java/util/Hashtable.java.html" target="_blank">Hashtable();
initRouteDefine();
}
/**
* 初始化Route的设置
*
*/
private static void initRouteDefine() throws java/lang/Exception.java.html" target="_blank">Exception
{
if( routerdefine == null )
routerdefine = new RouterDefine();
routerdefine.loadRouterDef();
}
/**
* 返回实例
* @return com.web.router.XMLRouter
*/
public static XMLRouter getInstance(long index) throws RouterException
{
return (XMLRouter)QueueRouter.get(new java/lang/Long.java.html" target="_blank">Long(index));
}
/**
* 产生一个XMLRouter的实例
* @return com.web.router.XMLRouter
* @roseuid 3F1618A103BC
*/
public static XMLRouter popInstance() throws RouterException
{
routeIndex ++;
instance = new XMLRouter(routeIndex);
setDefine( instance );
QueueRouter.put(new java/lang/Long.java.html" target="_blank">Long(routeIndex), instance);
return instance;
}
/**
* 清空Hashtable，Vector等
* @roseuid 3F1618B203C1
*/
private static void freeResource() throws java/lang/Exception.java.html" target="_blank">Exception
{
QueuePairFront.clear();
QueuePairBack.clear();
QueueRouter.clear();
QueuePairFront = QueuePairBack = QueueRouter = null;
}
/**
* 清除实例
* @param instanceID
* @throws Exception
*/
public static void removeInstance(XMLRouter instance) throws java/lang/Exception.java.html" target="_blank">Exception
{
instance.clear();
QueueRouter.remove( new java/lang/Long.java.html" target="_blank">Long(instance.getIndex() ) ) ;
}
/**
* Method isNull.
* @return boolean
*/
public static boolean isNull()
{
……
return false;
}
}
XMLRouter
package com.web.router;
import com.web.platform.Exception.RouterException;
import com.web.common.*;
import java.util.*;
import java.lang.reflect.java/lang/reflect/Method.java.html" target="_blank">Method;
import java.lang.reflect.java/lang/reflect/Constructor.java.html" target="_blank">Constructor;
/**
* @author keli
* @version 0.0.1
* 平台的关键，路由的类,每个Router将从RouterFactory里读取
* Router存储的树front,和back,routeIndex,目的是为了能在路由
* 之后可以清除申请的对象。
* Router可以实现同步和异步的功能.
*/
public class XMLRouter
{
/**
* Router存储的树front
*/
private static java/util/Hashtable.java.html" target="_blank">Hashtable QueuePairFront = null;
/**
* Router存储的树back
*/
private static java/util/Hashtable.java.html" target="_blank">Hashtable QueuePairBack = null;
/**
* 本router的index号码
*/
private long routeIndex = 0;
/**
* router的设置
*/
private RouterDefine define = null;
/**
* 用于判断是路由的起回点
*/
private java/lang/String.java.html" target="_blank">String action = "";
/**
*此变量只是用于在routeto方法中申请新的class
*/
private java/lang/String.java.html" target="_blank">String classname = "";
/**
*/
public XMLRouter(long index)
{
routeIndex = index;
}
/**
* 路由
* @throws Exception
* @roseuid 3F1616BD0186
*/
public void routing(Env env) throws RouterException, java/lang/Exception.java.html" target="_blank">Exception
{
/*如果为起点*/
if( action.equalsIgnoreCase( RouterConstant.CFG_FUNC_ROUTETO ) )
{
……
}
/*如果为返回点*/
else if( action.equalsIgnoreCase( RouterConstant.CFG_FUNC_ROUTEBACK ) )
{
……
}
/*否则为错误*/
else
throw new RouterException("Set Router action error.");
}
/**
* 读取本Router的id号.
* @return long
*/
public long getIndex()
{
return routeIndex;
}
/**
* 清除所有对象.
* @throws RouterException
*/
public void clear() throws RouterException
{
QueuePairFront.remove(new java/lang/Long.java.html" target="_blank">Long(routeIndex));
QueuePairBack.remove(new java/lang/Long.java.html" target="_blank">Long(routeIndex));
/*系统回收*/
java/lang/System.java.html" target="_blank">System.runFinalization();
}
/**
* 设置本Router的设置.
* @param def
* @throws RouterException
*/
public void setDefine(RouterDefine def) throws RouterException
{
define = def;
}
/**
* 设置action的值
* @param actionName
* @throws RouterException
*/
public void setAction( java/lang/String.java.html" target="_blank">String actionName )
{
action = actionName;
}
}
Service类
package com.web.common;
import com.web.platform.Exception.RouterException;
/**
* Service的父类，abstract
*/
public abstract class RouteService
{
/**
*/
public RouteService()
{
}
/**
* routeTo方法，是交易的起点。
* @param env
* @throws RouterException
*/
public abstract void routeto(Env env) throws RouterException;
/**
* routeBack，交易的结束点，
* @param env
* @throws RouterException
*/
public abstract void routeback(Env env) throws RouterException;
/**
* routeaccept方法，是交易的接收点，也是routeto的接收函数，
* routeaccept为被动交易对象的主要处理函数
* @param env
* @throws RouterException
*/
public abstract void routeaccept(Env env) throws RouterException;
/**
* routing方法，是Service对外的接口函数
* @throws RouterException
*/
public abstract void routing() throws RouterException;
接下来则需要实现所有的Services的类了,这里就不做介绍了.
六.说明
这个Router到目前为止只能实现同步的交易, 暂时不支持异步的交易,但是由于对Router使用了Composite的模式设计的,实现异步交易也是可以扩展的,这里不做详细分析.
这篇文章是我工作的一个总结,希望能对大家有所帮助.不足之处希望多多指教.