Servlet With Thread : Thread « Servlet « Java Tutorial

1. Java Tutorial
2. Servlet
3. Thread

import java.io.*;
import javax.servlet.*;
import javax.servlet.http.*;
import java.util.*;

public class MyServlet extends HttpServlet implements Runnable {

  long lastprime = 0;                    
  Date lastprimeModified = new Date();   
  Thread searcher;

  public void init() throws ServletException {
    searcher = new Thread(this);
    searcher.setPriority(Thread.MIN_PRIORITY);
    searcher.start();
  }

  public void run() {
    long candidate = 2;

    while (true) {     
      candidate += 2;                    
      try {
        searcher.sleep(5000);
      }
      catch (InterruptedException ignored) { }
      lastprime = 1;   
    }
  }

  public void doGet(HttpServletRequest req, HttpServletResponse res)
                               throws ServletException, IOException {
    res.setContentType("text/plain");
    PrintWriter out = res.getWriter();
    if (lastprime == 0) {
      out.println("Still searching for first prime...");
    }
    else {
      out.println("The last prime discovered was " + lastprime);
      out.println(" at " + lastprimeModified);
    }
  }

  public void destroy() {
    searcher.stop();
  }
}

<?xml version="1.0" encoding="ISO-8859-1"?>

<!DOCTYPE web-app
    PUBLIC "-//Sun Microsystems, Inc.//DTD Web Application 2.2//EN"
    "http://java.sun.com/j2ee/dtds/web-app_2_2.dtd">

<web-app>
    <servlet><servlet-name>MyServletName</servlet-name>
             <servlet-class>MyServlet</servlet-class>
    </servlet>
    
    <servlet-mapping><servlet-name>MyServletName</servlet-name>
        <url-pattern>/index.html</url-pattern>
    </servlet-mapping>
</web-app>

25.28.Thread
	25.28.1.	Servlet With Thread