Handling MySQL Errors

Max User Connections problem should be really fixed at this point. You
also cannot delete a location unless no devices/employees are there.
There is now a "something went wrong!" page in case someone works around
that.

WebContent/adminLogin.jsp

@@ -8,21 +8,28 @@ String pass;
 Cookie adminCookie;
 ssoNum = Integer.parseInt(request.getParameter("ssoNum2"));
 pass = request.getParameter("pass");
-MySQLAccess myaccess = new MySQLAccess();
-Statement statement = myaccess.getStatement();
+String database = "jdbc:mysql://us-cdbr-iron-east-04.cleardb.net/ad_15a989204c2ff8a?user=b372dfe7409692&password=74f6e317";
+String user = "b372dfe7409692";
+String password = "74f6e317";
+System.getenv("VCAP_SERVICES");
+Class.forName("com.mysql.jdbc.Driver");
+Connection connection = DriverManager.getConnection(database, user, password);
+Statement stmt = connection.createStatement();
 ResultSet result;
-result = statement.executeQuery("select * FROM admin where Admin_ID='" + ssoNum + "' AND Password='" + pass + "'");
+result = stmt.executeQuery("select * FROM admin where Admin_ID='" + ssoNum + "' AND Password='" + pass + "'");
 
 if (result.next()){
 	request.getSession();
 	session.setAttribute("ssoNum", ssoNum);
 	adminCookie = new Cookie("ssoNum", Integer.toString(ssoNum));
 	adminCookie.setMaxAge(30*60);
 	response.addCookie(adminCookie);
-	statement.close();
+	stmt.close();
+	connection.close();
 	response.sendRedirect("html/webpages/admin.jsp");
 } else {
-	statement.close();
+	stmt.close();
+	connection.close();
 	response.sendRedirect("index.jsp");
 }
 

WebContent/html/webpages/adminLocation.jsp

@@ -230,8 +230,8 @@
                     <label for="modifyZip">Zip Code *</label>
                     <input style = "width: 100px;" name = "zip" type = "number" class="form-control" id="modifyZip" required = "true">
                 </div>
-                <button type = "submit" name = "modify" value = "Save Changes" class="btn btn-primary">Save Changes</button>
-                <button style = "display: inline-block;" type = "submit" name = "delete" value = "Delete Entry" class="btn btn-primary">Delete</button>
+                <button id = "themodifybutton" type = "submit" name = "modify" value = "Save Changes" class="btn btn-primary">Save Changes</button>
+                <button id = "thedeletebutton" type = "submit" name = "delete" value = "Delete Entry" class="btn btn-primary" style = "display: inline-block;" title = "hello">Delete</button>
                 <input type = "text" id = "modifyID" name = "id" style = "display: none;">
               </form>
             </div>
@@ -323,6 +323,15 @@ function modifyModal(){
   $("#modifyState").val(locations[i].state);
   $("#modifyZip").val(locations[i].zip);
   $("#modifyID").val(locations[i].id);
+  
+  if(locations[i].numDevices > 0 || locations[i].numEmployees > 0){
+  $('#thedeletebutton').attr('disabled',true);
+  $('#thedeletebutton').attr('title','Cannot delete because devices and/or employees are at this location!');
+  }
+  else{
+  $('#thedeletebutton').attr('disabled',false);
+  $('#thedeletebutton').removeAttr('title');
+  }
   $("#modifyModal").show();
 }
 

WebContent/html/webpages/deviceRedirect.jsp

@@ -28,7 +28,6 @@
 
 <%
 //make instance
-MySQLAccess myaccess = new MySQLAccess();
 String name = request.getParameter("name").replace("\"","\\\"");
 String description = request.getParameter("description").replace("\"","\\\"");
 String status = request.getParameter("status");

WebContent/html/webpages/locationRedirect.jsp

@@ -34,6 +34,7 @@ String address = request.getParameter("address").replace("\"","\\\"");
 String town = request.getParameter("town").replace("\"","\\\"");
 String state = request.getParameter("state");
 String zip = request.getParameter("zip");
+int er = 0;
 //add form was submitted
 if(request.getParameter("add") != null){
   Location location = new Location(name,address,town,state,zip,0);
@@ -52,11 +53,14 @@ if(request.getParameter("modify") != null){
 if(request.getParameter("delete") != null){
   String strID = request.getParameter("id");
   int id = Integer.parseInt(strID);
-  LocationQueries.deleteLocation(id);
+  er = LocationQueries.deleteLocation(id);
 }
 %>
 <script>
+if(<%=er%> == 0)
 window.location.replace("adminLocation.jsp");
+else
+window.location.replace("somethingwrong.jsp");
 </script>
 <!-- Navbar generation. -->
 </body>

WebContent/html/webpages/profileSettingsRedirect.jsp

@@ -28,7 +28,6 @@
 
 <%
 //make instance
-MySQLAccess myaccess = new MySQLAccess();
 String name = request.getParameter("name").replace("\"","\\\"");
 int id = Integer.parseInt(request.getParameter("sso"));
 String phone = request.getParameter("phone");

WebContent/html/webpages/somethingwrong.jsp

@@ -0,0 +1,40 @@
+<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
+<html lang="en">
+<head>
+  <meta charset="utf-8">
+  <meta http-equiv="X-UA-Compatible" content="IE=edge">
+  <meta name="viewport" content="width=device-width, initial-scale=1">
+  <!-- The above 3 meta tags *must* come first in the head; any other head content must come *after* these tags -->
+  <meta name="description" content="">
+  <meta name="author" content="">
+
+  <title>Synchrony Financial</title>
+
+  <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css">
+  <script src="https://ajax.googleapis.com/ajax/libs/jquery/1.12.4/jquery.min.js"></script>
+  <script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js"></script>
+  <link rel = "stylesheet" type = "text/css" href = "../css/stylesheet.css">
+  <link rel = "shortcut icon" href = "../imgs/synchrony-financial-logo-dlpx_1.ico">
+  <style>
+  div.error{
+      text-align: center; 
+      position: absolute; 
+      top: 50%; 
+      left: 50%; 
+      margin-top: -126px;
+      margin-left: -138px;
+    }
+  </style>
+</head>
+
+<body>
+  <nav class="navbar navbar-inverse navbar-fixed-top" id = "navbaruniversal">
+    <%@ include file="navbar.jsp"%>
+  </nav>
+  <div class = "error">
+  	<h2>Something Went Wrong!</h2>
+  	<img src="../imgs/my-icons-collection-128px/png/wrong.png"/>
+  	<h2>Try Again Later.</h2>
+  </div>
+</body>
+</html>

WebContent/index.jsp

@@ -68,7 +68,7 @@
     div.menuOption{
       display: inline-block; 
       width: 250px; 
-      height: 150px; 
+      height: 210px; 
       vertical-align: top; 
       border: solid; 
       padding: 10px; 
@@ -95,16 +95,16 @@
        <div class = "menuOption">
          <h2>User Login</h2>
          <form action="userLogin.jsp" method="post">
-         	<input type="text" name="ssoNum" placeholder="SSO Number" /><br>
-         	<input type ="submit" value="Login" />
+         	<input class = "form-control" type="text" name="ssoNum" placeholder="SSO Number" /><br>
+         	<button type = "submit" value = "Add" class="btn btn-primary">Login</button>
          </form>
          </div>
       <div class = "menuOption">
         <h2>Admin Login</h2> 
          <form action="adminLogin.jsp" method="post">
-         	<input type="text" name="ssoNum2" placeholder="SSO Number" />
-         	<input type="password" name="pass"  placeholder="Password" />
-         	<input type ="submit" value="Login" />
+         	<input class = "form-control" type="text" name="ssoNum2" placeholder="SSO Number" />
+         	<input class = "form-control" type="password" name="pass"  placeholder="Password" /><br>
+         	<button type = "submit" value = "Add" class="btn btn-primary">Login</button>
          </form>
          </div>
  </div> 
@@ -124,7 +124,7 @@ if(usercookies != null){
 		if(c.getName().equals("ssoNum")){//when (and if) we get to user cookie we want to reset it
 			navsso = c.getValue(); 
 			c.setMaxAge(0);//delete current
-			newCookie = new Cookie("ssoNum",navsso);//make new one
+			newCookie = new Cookie("ssoNum",navsso); //make new one
 			newCookie.setMaxAge(30*60);
 			response.addCookie(newCookie);
 			break;

WebContent/userLogin.jsp

@@ -6,21 +6,28 @@
 int ssoNum;
 Cookie userCookie;
 ssoNum = Integer.parseInt(request.getParameter("ssoNum"));
-MySQLAccess myaccess = new MySQLAccess();
-Statement statement = myaccess.getStatement();
+System.getenv("VCAP_SERVICES");
+Class.forName("com.mysql.jdbc.Driver");
+String database = "jdbc:mysql://us-cdbr-iron-east-04.cleardb.net/ad_15a989204c2ff8a?user=b372dfe7409692&password=74f6e317";
+String user = "b372dfe7409692";
+String password = "74f6e317";
+Connection connection = DriverManager.getConnection(database, user, password);
+Statement stmt = connection.createStatement();
 ResultSet result;
-result = statement.executeQuery("select * FROM employee where Employee_ID='" + ssoNum + "'");
+result = stmt.executeQuery("select * FROM employee where Employee_ID='" + ssoNum + "'");
 
 if (result.next()){
 	request.getSession();
 	session.setAttribute("ssoNum", ssoNum);
 	userCookie = new Cookie("ssoNum", Integer.toString(ssoNum));
 	userCookie.setMaxAge(30*60);
 	response.addCookie(userCookie);
-	statement.close();
+	stmt.close();
+	connection.close();
 	response.sendRedirect("html/webpages/index.jsp");
 } else {
-	statement.close();
+	stmt.close();
+	connection.close();
 	response.sendRedirect("index.jsp");
 }
 

src/database/EmployeeQueries.java

@@ -12,17 +12,22 @@ public class EmployeeQueries {
 
 	public static void initializeEmployee(int id) throws ClassNotFoundException, SQLException
 	{
-		MySQLAccess access = new MySQLAccess();
-		Statement statement = access.getStatement();
-		statement.executeUpdate("INSERT INTO employee (Employee_ID) VALUES ("+id+");");
-		access.closeConnection();
+		System.getenv("VCAP_SERVICES");
+		Class.forName("com.mysql.jdbc.Driver");
+		Connection connection = DriverManager.getConnection(database, user, password);
+		Statement stmt = connection.createStatement();
+		stmt.executeUpdate("INSERT INTO employee (Employee_ID) VALUES ("+id+");");
+		stmt.close();
+		connection.close();
 	}
 
 	public static void updateEmployee(int id, String name, String phone, int location, String email) throws ClassNotFoundException, SQLException
 	{
 		System.out.println("Updating employee "+id+": "+name+".\nPhone: "+phone+", location: "+location);
-		MySQLAccess access = new MySQLAccess();
-		Statement statement = access.getStatement();
+		System.getenv("VCAP_SERVICES");
+		Class.forName("com.mysql.jdbc.Driver");
+		Connection connection = DriverManager.getConnection(database, user, password);
+		Statement stmt = connection.createStatement();
 		String query = "";
 		query+="UPDATE employee SET ";
 		query+="Name='"+name;
@@ -31,8 +36,9 @@ public static void updateEmployee(int id, String name, String phone, int locatio
 		query+=", Email='"+email;
 		query+="' WHERE Employee_ID="+id;
 		System.out.println(query);
-		statement.executeUpdate(query);
-		access.closeConnection();
+		stmt.executeUpdate(query);
+		stmt.close();
+		connection.close();
 	}
 
 	public static void updateEmployee(int id, String name, int icon, String phone, String email) throws ClassNotFoundException, SQLException
@@ -57,9 +63,11 @@ public static void updateEmployee(int id, String name, int icon, String phone, S
 
 	public static User getEmployeeByID(int id) throws ClassNotFoundException, SQLException
 	{
-		MySQLAccess access = new MySQLAccess();
-		Statement statement = access.getStatement();
-		ResultSet resultSet = statement.executeQuery("Select * FROM employee WHERE Employee_ID = "+id);
+		System.getenv("VCAP_SERVICES");
+		Class.forName("com.mysql.jdbc.Driver");
+		Connection connection = DriverManager.getConnection(database, user, password);
+		Statement stmt = connection.createStatement();
+		ResultSet resultSet = stmt.executeQuery("Select * FROM employee WHERE Employee_ID = "+id);
 		resultSet.next();
 		User employee = new User(
 			id,
@@ -69,18 +77,20 @@ public static User getEmployeeByID(int id) throws ClassNotFoundException, SQLExc
 			resultSet.getString("Email"),
 			resultSet.getInt("Img_Index")
 			);
-		resultSet = statement.executeQuery("SELECT Address FROM location WHERE Location_ID = "+employee.getLocation());
+		resultSet = stmt.executeQuery("SELECT Address FROM location WHERE Location_ID = "+employee.getLocation());
 		resultSet.next();
 		employee.setLocationName(resultSet.getString("Address"));
-		access.closeConnection();
+		stmt.close();
+		connection.close();
 		return employee;
 	}
 
 	public static User[] getAllUsers() throws SQLException, ClassNotFoundException{
 		//database connect
 		System.getenv("VCAP_SERVICES");
-		MySQLAccess access = new MySQLAccess();
-		Statement stmt = access.getStatement();
+		Class.forName("com.mysql.jdbc.Driver");
+		Connection connection = DriverManager.getConnection(database, user, password);
+		Statement stmt = connection.createStatement();
 		ResultSet resultSet = stmt.executeQuery("SELECT * FROM employee");
 		int counter = 0;
 
@@ -97,7 +107,8 @@ public static User[] getAllUsers() throws SQLException, ClassNotFoundException{
 			counter++;
 		}
 
-		access.closeConnection();
+		stmt.close();
+		connection.close();
 		return users;		
 	}
 }