在 Google App Engine JAVA 中创建多个实例

发布于 2024-12-02 22:12:24 字数 1569 浏览 2 评论 0原文

我正在使用 JAVA 测试 Google App Engine，我想测试并行运行多个实例。但是，我不知道如何激活多个实例。

我尝试在不同的浏览器中运行此 Servlet（我也尝试在不同的计算机中运行并发调用 - 使用不同的 IP）

import java.io.IOException;
import javax.servlet.*;
import javax.servlet.http.*;
import java.math.*;
public class SimpleServlet extends HttpServlet
{
  //A variable that is NOT thread-safe!

  public void doGet(HttpServletRequest req, HttpServletResponse resp)
    throws ServletException, IOException
  {
    doPost(req, resp);
  }
  public void doPost(HttpServletRequest req, HttpServletResponse resp)
    throws ServletException, IOException
  {
     int counter = 0;
    resp.getWriter().println("<HTML><BODY>");
    resp.getWriter().println(this + ": <br>");
    for (int c = 0; c < 10; c++)
    {
      resp.getWriter().println("Counter = " + counter + "<BR>");
      try
      {
        //Thread.currentThread().sleep( 500);
          for (int e=0;e<9999;e++) {
          }
        Thread.sleep(500);

        counter++;
      }
      catch (InterruptedException exc) {
        resp.getWriter().println("I can't sleep<BR>");
      }
    }
    resp.getWriter().println("</BODY></HTML>");
  }
}

每个 Servlet 需要 5 秒来处理，但请求会集中在单个实例中，例如，如果我运行此 Servlet 10 次然后花了50秒来处理最后一个。

我尝试使用：

<threadsafe>true</threadsafe>

但它什么也没做。

我尝试更改设置

settings

但没有运气。

在此处输入图像描述

那么，我能做什么？

原文

I am testing Google App Engine using JAVA and I want to test to run multiples instances in parallel. However, I don't know how to activate multiples instances.

I tried running this Servlet in different browser (also I tried running concurrent calls in a different machine - with different IP)

import java.io.IOException;
import javax.servlet.*;
import javax.servlet.http.*;
import java.math.*;
public class SimpleServlet extends HttpServlet
{
  //A variable that is NOT thread-safe!

  public void doGet(HttpServletRequest req, HttpServletResponse resp)
    throws ServletException, IOException
  {
    doPost(req, resp);
  }
  public void doPost(HttpServletRequest req, HttpServletResponse resp)
    throws ServletException, IOException
  {
     int counter = 0;
    resp.getWriter().println("<HTML><BODY>");
    resp.getWriter().println(this + ": <br>");
    for (int c = 0; c < 10; c++)
    {
      resp.getWriter().println("Counter = " + counter + "<BR>");
      try
      {
        //Thread.currentThread().sleep( 500);
          for (int e=0;e<9999;e++) {
          }
        Thread.sleep(500);

        counter++;
      }
      catch (InterruptedException exc) {
        resp.getWriter().println("I can't sleep<BR>");
      }
    }
    resp.getWriter().println("</BODY></HTML>");
  }
}

Every Servlet took 5 seconds to process but the requests are pooled in a single instance, for example if I run 10 times this servlet then it took 50 seconds to process the last one.

I tried using: