springtapestryengine.java

这是< Spring in Action 2005> 源码值得学习

package com.springinaction.tapestry;

import java.util.Map;

import javax.servlet.ServletContext;

import org.apache.tapestry.engine.BaseEngine;
import org.apache.tapestry.request.RequestContext;
import org.springframework.context.ApplicationContext;
import org.springframework.web.context.support.WebApplicationContextUtils;

public class SpringTapestryEngine extends BaseEngine {
  private static final String SPRING_CONTEXT_KEY = "springContext";
  
  protected void setupForRequest(RequestContext context) {
    super.setupForRequest(context);
    
    Map global = (Map) getGlobal();
    
    ApplicationContext appContext = 
        (ApplicationContext) global.get(SPRING_CONTEXT_KEY);
    
    if(context == null) {
      ServletContext servletContext = context.getServlet().getServletContext();
      appContext = WebApplicationContextUtils.
          getWebApplicationContext(servletContext);
      
      global.put(SPRING_CONTEXT_KEY, appContext);
    }
  }
}