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Glassfish JNDI一覧表示 |
はじめて、InitialContext? が、なんで "Initial" なのか分かったわ
package com.mycompany.sampleweb;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.Enumeration;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.naming.Binding;
import javax.naming.Context;
import javax.naming.InitialContext;
import javax.naming.NamingEnumeration;
import javax.naming.NamingException;
import javax.naming.RefAddr;
import javax.naming.Reference;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
@WebServlet(name = "NewServlet", urlPatterns = {"/NewServlet"})
public class NewServlet extends HttpServlet {
/**
* Processes requests for both HTTP <code>GET</code> and <code>POST</code>
* methods.
*
* @param request servlet request
* @param response servlet response
* @throws ServletException if a servlet-specific error occurs
* @throws IOException if an I/O error occurs
*/
protected void processRequest(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
response.setContentType("text/html;charset=UTF-8");
try (PrintWriter out = response.getWriter()) {
out.println("<!DOCTYPE html>");
out.println("<html>");
out.println("<head>");
out.println("<title>Servlet NewServlet</title>");
out.println("</head>");
out.println("<body>");
out.println("<h1>Servlet NewServlet at " + request.getContextPath() + "</h1>");
out.println(dumpJndi("", new InitialContext()));
out.println("</body>");
out.println("</html>");
} catch (Exception ex) {
Logger.getLogger(NewServlet.class.getName()).log(Level.SEVERE, null, ex);
}
}
private String dumpJndi(String prefix, Context ctx) throws NamingException {
StringBuilder sb = new StringBuilder();
sb.append("<ul>");
NamingEnumeration<Binding> bindings = ctx.listBindings("");
while(bindings.hasMoreElements()) {
Binding binding = bindings.next();
String name = binding.getName();
Object obj = binding.getObject();
sb.append("<li>")
.append(prefix)
.append(binding.getName())
.append("<font size=2 color='gray'> ")
.append(binding.getClassName())
.append("</font>");
if (obj instanceof Context) {
sb.append(dumpJndi(prefix + name + "/", (Context)obj));
} else if (obj instanceof Reference) {
sb.append(dumpReference(prefix + name + "/", (Reference)obj));
}
sb.append("</li>");
}
sb.append("</ul>");
return sb.toString();
}
private String dumpReference(final String prefix, final Reference ref) {
StringBuilder sb = new StringBuilder();
sb.append("<ul>");
Enumeration<RefAddr> refAddrs = ref.getAll();
while(refAddrs.hasMoreElements()) {
RefAddr refAddr = refAddrs.nextElement();
String type = refAddr.getType();
Object content = refAddr.getContent();
sb.append("<li>")
.append(type).append("=").append(content)
.append("</li>");
}
sb.append("</ul>");
return sb.toString();
}
// <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>
}
jndi.png