package com.suning.esb.asyncservlet;

import java.io.IOException;
import java.io.PrintWriter;

import javax.servlet.AsyncContext;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

/**
 * Servlet implementation class DemoServleet
 */
@WebServlet(urlPatterns = "/DemoServleet", asyncSupported = true)
public class DemoServlet extends HttpServlet {
	private static final long serialVersionUID = 1L;

	/**
	 * @see HttpServlet#HttpServlet()
	 */
	public DemoServlet() {
		super();
		// TODO Auto-generated constructor stub
	}

	/**
	 * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse
	 *      response)
	 */
	protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
		resp.setContentType("text/html;charset=UTF-8");
		AsyncContext ctx = req.startAsync();
		new Thread(new Executor(ctx)).start();
	}

	/**
	 * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse
	 *      response)
	 */
	protected void doPost(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {
		doGet(request, response);
	}

	public class Executor implements Runnable {
		private AsyncContext ctx = null;

		public Executor(AsyncContext ctx) {
			this.ctx = ctx;
		}

		public void run() {
			try {
				char[] data = new char[1024 * 512 * 1];
				PrintWriter out = ctx.getResponse().getWriter();
				out.write(data);
				out.flush();
				ctx.complete();
			} catch (Exception e) {
				e.printStackTrace();
			}
		}
	}

}