RequestDispatcher.java

package org.theonefx.wcframework.mvc.wcweb;

import javax.servlet.ServletContext;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.theonefx.wcframework.mvc.WebApplicationContext;

/**
 * @File   		: RequestDispatcher.java
 * @ClassName   : RequestDispatcher 
 * @Author 		: 陈曦
 * @Date   		: 2012-3-22 下午02:12:06
 * @Version		: v1.0
 * @Description : WCF的web请求分发器
 */
public class RequestDispatcher {

	private final WebApplicationContext wactx;

	private final ServletContext servletContext;
	
	private final ActionProxyFactory actionFactory;

	public RequestDispatcher(ServletContext servletContext) {
		this.servletContext = servletContext;
		this.wactx = (WebApplicationContext) servletContext.getAttribute(WebApplicationContext.APPCTX_ATTRNAME);
		this.actionFactory = new ActionProxyFactory(wactx);
		servletContext.setAttribute(ActionProxyFactory.FactoryKey, actionFactory);
	}

	public boolean dispatch(HttpServletRequest req, HttpServletResponse res, RequestPather pather) throws Exception {
		return dispatch(req, res, pather, null);
	}
	
	public boolean dispatch(HttpServletRequest req, HttpServletResponse res, RequestPather pather, ActionInvocationContext rctx) throws Exception {
		ActionProxy proxy = getActionProxy(pather.getPath(), req);
		if (proxy == null) {
			return false;
		} else {
			if (rctx == null) {
				rctx = new ActionInvocationContext(wactx, pather, req, res, servletContext, this);
			}
			proxy.execute(rctx);
			return true;
		}
	}

	public ActionProxy getActionProxy(String path, HttpServletRequest req) {
		ActionProxy proxy = actionFactory.get(path, req);
		return proxy;
	}
	
	public void depose() {
		// 清理工作，暂时不需要做什么
	}
}