package com.smtservlet.resolver;

import javax.servlet.http.HttpServletRequest;

import org.springframework.web.method.HandlerMethod;
import org.springframework.web.servlet.handler.AbstractHandlerMapping;

import com.smtservlet.core.SMTApp;
import com.smtservlet.core.SMTApp.SMTRequestConfig;

public class SMTRequestMapping extends AbstractHandlerMapping
{
	public SMTRequestMapping()
	{
	}
	
	@Override
	protected Object getHandlerInternal(HttpServletRequest request)throws Exception 
	{
		// 通过request获得url
		SMTRequestConfig requestConfig = SMTApp.getRequestConfig(request);
		if(requestConfig == null || requestConfig._mapBean == null)
			return null;
		
		// 如果requestConfig._mapHandler未缓存，则缓存之
		synchronized(requestConfig)
		{
			if(requestConfig._mapHandler == null)
			{
				requestConfig._mapHandler = new HandlerMethod(requestConfig._mapBean, requestConfig._mapMethod);
			}
		}
		
		return requestConfig._mapHandler;
	}

}