<%
/*
* delete.jsp
*
* Deletes an entry in the address book with the specified name. On success,
* the name of the deleted entry will be displayed, on failure the error
* message will be displayed.
*
* Version: $Revision: 1.1 $ $Date: 2005/02/08 10:10:55 $
* Authors: Ernst de Haan (ernst@jollem.com)
*/
%>
<%@ page import="addressbook.ejb.*,java.io.*,java.util.*,javax.naming.*" %>
<%
// Make sure this page will not be cached by the browser
response.addHeader("Pragma", "no-cache");
response.addHeader("Cache-Control", "no-store");
// We will send error messages to System.err, for verbosity. In a real
// application you will probably not want this. We will send a few log
// messages to System.out.
PrintStream errorStream = System.err;
// If we find any fatal error, we will store it in the "error" variable. If we
// need to store the exception too, we will store it in "exception".
String error = null;
Exception exception = null;
// We will store the name for the entry to be deleted in this variable.
String name = null;
// We will first attempt to get the reference to the address book from the
// session. The "list.jsp" page sets this attribute in the session.
AddressBook addressBook = (AddressBook) session.getAttribute("AddressBook");
if (addressBook == null) {
error = "No connection with the AddressBook bean established.";
} else {
// Attempt to get the "name" parameter from the session
name = request.getParameter("name");
// If the name is null, then something is definitely wrong. When this page
// is called from "list.jsp", the name is always specified.
if (name == null) {
error = "No name specified.";
// Otherwise we will attempt to find and delete the entry
} else {
name = name.trim();
try {
addressBook.remove(name);
} catch (Exception e) {
exception = e;
error = "Caught \"" + exception.getClass().getName() +
"\" while attempting to remove the address entry with " +
"name \"" + name + "\".";
errorStream.println(error);
exception.printStackTrace(errorStream);
}
}
}
// Decide what the title will be.
String title;
if (error != null) {
title = "Error";
} else {
title = "Addressbook | Delete entry";
}
%>
<%= title %>
<%= title %>
<%
// If there was a fatal error, then display the error message
if (error != null) {
%>
<%= error %>
<%
// Otherwise display a message saying that the entry was deleted
} else {
%>