package org.nutz.mvc;
import java.io.IOException;
import javax.servlet.ServletConfig;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.nutz.lang.util.Context;
import org.nutz.mvc.config.ServletNutConfig;
/**
* 挂接到 JSP/Servlet 容器的入口
*
* @author zozoh(zozohtnt@gmail.com)
* @author wendal(wendal1985@gmail.com)
* @author juqkai(juqkai@gmail.com)
*/
@SuppressWarnings("serial")
public class NutServlet extends HttpServlet {
protected ActionHandler handler;
private String selfName;
private SessionProvider sp;
@Override
public void init(ServletConfig servletConfig) throws ServletException {
Mvcs.setServletContext(servletConfig.getServletContext());
selfName = servletConfig.getServletName();
Mvcs.set(selfName, null, null);
NutConfig config = new ServletNutConfig(servletConfig);
Mvcs.setNutConfig(config);
handler = new ActionHandler(config);
sp = config.getSessionProvider();
}
public void destroy() {
Mvcs.resetALL();
Mvcs.set(selfName, null, null);
if(handler != null)
handler.depose();
Mvcs.setServletContext(null);
Mvcs.close();
}
@Override
protected void service(HttpServletRequest req, HttpServletResponse resp)
throws ServletException, IOException {
String preName = Mvcs.getName();
Context preContext = Mvcs.resetALL();
try {
if (sp != null)
req = sp.filter(req, resp, getServletContext());
Mvcs.set(selfName, req, resp);
if (!handler.handle(req, resp))
resp.sendError(404);
} finally {
Mvcs.resetALL();
//仅当forward/incule时,才需要恢复之前设置
if (null != (req.getAttribute("javax.servlet.forward.request_uri"))) {
if (preName != null)
Mvcs.set(preName, req, resp);
if (preContext != null)
Mvcs.ctx.reqThreadLocal.set(preContext);
}
}
}
}