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/*
* To change this template, choose Tools | Templates
* and open the template in the editor.
*/
package prober;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.*;
import java.util.concurrent.atomic.AtomicInteger;
import javax.annotation.Resource;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.glassfish.flashlight.client.ProbeClientMediator;
import org.glassfish.flashlight.provider.FlashlightProbe;
import org.glassfish.flashlight.provider.ProbeRegistry;
/**
* @author Byron Nevins
*/
public class ProberServlet extends HttpServlet {
@Resource
private ProbeClientMediator listenerRegistrar;
@Resource
private ProbeRegistry probeRegistry;
private PrintWriter out;
protected void processRequest(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
response.setContentType("text/html;charset=UTF-8");
out = response.getWriter();
try {
pr("<html>");
pr("<head>");
pr("<title>Servlet ProbeServlet</title>");
pr("</head>");
pr("<body>");
pr("<h2>All Probes</h2>");
pr("<ul>");
// KISS
for (Iterator<String> it = getAllProbes().iterator(); it.hasNext();) {
String s = it.next();
if(s.startsWith("fooblog"))
s = "<b>" + s + "</b>";
pr("<li>" + s + "</li>");
}
pr("</ul>");
pr("</body>");
pr("</html>");
}
finally {
out.close();
}
}
@Override
public void init() throws ServletException {
if (listenerRegistrar == null)
throw new ServletException("ProbeClientMediator was not injected.");
try {
listenerRegistrar.registerListener(new ConnectionProbeListener());
}
catch (Exception e) {
throw new ServletException("Error initializing", e);
}
}
private void pr(String s) {
out.println(s);
}
private Set<String> getAllProbes() {
Collection<FlashlightProbe> probes = probeRegistry.getAllProbes();
NavigableSet sorted = new TreeSet<String>();
for (FlashlightProbe flp : probes) {
String probeString = flp.toString();
sorted.add(probeString);
}
if (sorted.isEmpty()) {
sorted.add("No Probes found!");
}
return sorted;
}
// <editor-fold defaultstate="collapsed" desc="HttpServlet methods. Click on the + sign on the left to edit the code.">
/**
* Handles the HTTP <code>GET</code> method.
* @param request servlet request
* @param response servlet response
* @throws ServletException if a servlet-specific error occurs
* @throws IOException if an I/O error occurs
*/
@Override
protected void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
processRequest(request, response);
}
/**
* Handles the HTTP <code>POST</code> method.
* @param request servlet request
* @param response servlet response
* @throws ServletException if a servlet-specific error occurs
* @throws IOException if an I/O error occurs
*/
@Override
protected void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
processRequest(request, response);
}
/**
* Returns a short description of the servlet.
* @return a String containing servlet description
*/
@Override
public String getServletInfo() {
return "Short description";
}// </editor-fold>
private final static AtomicInteger counter = new AtomicInteger();
}