Servlet 3.0 HTTP 404 - The requested resource () is not available

Environment:

Ubuntu 12.04
Apache Tomcat 7.0.27
Eclipse 4.2 (Juno)
Servlet 3.0
Openjdk 7
Trying to do a FileCounter with Servlet 3.0, I get this error on URL

http://localhost:8080/wtp.filecounter/.

Wouldn't have to be http://localhost:8080/wtp.filecounter/FileCounter?

Estado HTTP 404 -

type Informe de estado

mensaje

descripción El recurso requerido () no está disponible.

Apache Tomcat/7.0.2

6

Structure

wtp.filecounter
-dao
- -FileDao.java
-servlets
- -FileCounter.java

FileDao.java read and update visitors to a file

package wtp.filecounter.dao;

import java.io.BufferedReader;
import java.io.File;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
import java.io.PrintWriter;

public class FileDao {

public int getCount() {
    int count = 0;
    // Load the file with the counter
    FileReader fileReader = null;
    BufferedReader bufferedReader = null;
    PrintWriter writer = null ; 
    try {
      File f = new File("FileCounter.initial");
      if (!f.exists()) {
        f.createNewFile();
        writer = new PrintWriter(new FileWriter(f));
        writer.println(0);
      }
      if (writer !=null){
        writer.close();
      }

fileReader = new FileReader(f);
      bufferedReader = new BufferedReader(fileReader);
      String initial = bufferedReader.readLine();
      count = Integer.parseInt(initial);
    } catch (Exception ex) {
      if (writer !=null){
        writer.close();
      }
    }
    if (bufferedReader != null) {
      try {
        bufferedReader.close();
      } catch (IOException e) {
        e.printStackTrace();
      }
    }
    return count;
  }

public void save(int count) throws Exception {
    FileWriter fileWriter = null;
    PrintWriter printWriter = null;
    fileWriter = new FileWriter("FileCounter.initial");
    printWriter = new PrintWriter(fileWriter);
    printWriter.println(count);

// Make sure to close the file
    if (printWriter != null) {
      printWriter.close();
    }
  }
}

FileCounter.java servlet that read counter and write in text plain

package wtp.filecounter.servlets;
import java.io.IOException;
import java.io.PrintWriter;

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

import wtp.filecounter.dao.FileDao;

/**
 * Servlet implementation class FileCounter
 */
@WebServlet("/FileCounter")
public class FileCounter extends HttpServlet {
  private static final long serialVersionUID = 1L;

int count;
  private FileDao dao;

public void init() throws ServletException {
    dao = new FileDao();
    try {
      count = dao.getCount();
    } catch (Exception e) {
      getServletContext().log("An exception occurred in FileCounter", e);
      throw new ServletException("An exception occurred in FileCounter"
          + e.getMessage());
    }
  }

protected void doGet(HttpServletRequest request,
      HttpServletResponse response) throws ServletException, IOException {
    // Set a cookie for the user, so that the counter does not increate
    // everytime the user press refresh
    HttpSession session = request.getSession(true);
    // Set the session valid for 5 secs
    session.setMaxInactiveInterval(5);
    response.setContentType("text/plain");
    PrintWriter out = response.getWriter();
    if (session.isNew()) {
      count++;
    }
    out.println("This site has been accessed " + count + " times.");
  }

public void destroy() {
    super.destroy();
    try {
      dao.save(count);
    } catch (Exception e) {
      e.printStackTrace();
    }
  }
}

web.xml

Any idea about what's wrong?

When I run on server the project open ''http://localhost:8080/wtp.filecounter/'' instead of ''http://localhost:8080/wtp.filecounter/FileCounter'' and the second URL works

Joey Sanchez wrote:
When I run on server the project open ''http://localhost:8080/wtp.filecounter/'' instead of ''http://localhost:8080/wtp.filecounter/FileCounter'' and the second URL works

Hi Joey

The second one works because that where the servlet is found. The "wtp.filecounter" portion is your application context. If you want to access the servlet using "http://localhost:8080/wtp.filecounter/" then you need to change your welcome file to point to the FileCounter servlet instead of using those default welcome files.