Online Examination Using Farming Based System Ajay Anand(d0267003) Kapil More(d0267007) Sri...

Online Examination Using Farming Based System

Ajay Anand(d0267003)

Kapil More(d0267007)

Sri Ram(d0267027)

Yogesh Patrikar(d0267022)

Online Examination Using Farming Based System

Load BalancingCorba Architecture Platform IndependentN-tier ArchitectureAnalysis and DesignDatabase ConnectivityGUI and Web Server

Load Balancing

The core idea of this project is Load Balancing.Load Balancing is done by the SchedulerScheduler Receives the request from the client

and on the basis of priority/time requirement,loads on the servers ,forwards the requests to the appropriate server.

There are lots of servers behind the Scheduler to handle the requests.

Common Object Request Broker

Common Object Request Broker Architecture is a standard architecture for distributed object systems.

It allows distributed heterogeneous collection of objects to interoperate by providing a set of standard interfaces.

Platform Independent

This project is Platform Independent.Client and Server can reside anywhere in

the word on any platform.Client makes call without knowing where

the server is .Handle Transparency.

N-tiers Architecture

Scheduler

N-tiers Architecture

It is an N-Tiers Architecture.The Sequence is:

Client-Web Server-Scheduler-Cluster Server-Database-……….

Architecture…

APP1

APP2

APP3

APP4

SchedulerTomcatWeb ClientMySQL

Detail Architecture…

APS1

APS2

APS3

APS4

SchedulerTomcatWeb ClientMySQL

NS 1000

NS 2000Registration,

Authentication,………….

Registration1, Registration2, Registration3,…………….

Proxy Design Pattern

Scheduler Mechanism….

function_impl {

give(info);

waitforlock();

getlock();

…..

client code follows……

Scheduler

Function call

Server ID

Analysis and Design

UML(Unified Modeling Language)– Standard for describing designs– Visual: a set of diagrams

Use Case DiagramsSequence DiagramsCollaboration DiagramsIDL

Use Case

Registration

(from User)

Taking Exam

(from User)

View Result

(from User)

Student

(f rom Exam)

Paper Registration

(from Admin)

Statistical Report

(from Admin)

Logout

(from Exam)

Login

(from Exam)

HR Admin

(f rom Exam)

User Validation

(from Exam)

<<include>>

User Validation

(from Scheduller)

Configuration

(from Admin)

System Admin

(f rom Scheduller)

Reporting

(from Scheduller)

Login

(from Scheduller)

Logout

(from Scheduller)

System User

(f rom Scheduller)

<<include>>

Sequence Diagram:SystemAdmin-Config

: System Admin CI : Config Interface CC : Config Controller CE : Configuration CDB : ConfigDB

Request for configuring parameter

Config Param and Values

Update configuration

Set Config

Collaboration Diagram:SystemAdmin-Config

: System Admin CI : Config Interface CC : Config Controller

CE : Configuration

CDB : ConfigDB

1: Request for configuring parameter

8:

2: Config Param and Values

7:

3: Update configuration

6:

4: Set Config

5:

Sequence Diagram:Student-Examination

: Student EU : Examination UI EC : Examination Controller : Schedulling E : Examination EDB : ExamDB

Request for taking an exam

Request for a question

Get previous question list

Forward request to server

Forward the request to Exam controller

Get Question

Collaboration Diagram:Student-Examination

: Student EU : Examination UI

: Schedulling

E : Examination

EC : Examination Controller

3: Get previous question list

EDB : ExamDB

1: Request for taking an exam

10:

2: Request for a question

9:

4: Forward request to server

5: Forward the request to Exam controller

8:

6: Get Question

7:

Sequence Diagram:Student-ViewResult

: Student VR : View Result UI VC : View Result Controller : Schedulling : Examination ESDB : ExamStatisticDB

Show result

View result request for user

Collaboration Diagram:Student-ViewResult

: Registration

: Registration Controller

: Registration Form

: Student

: Schedulling

: (Student)

4: Get shortest job5: Get least loaded server

7: Set Student Data8:

3: Please schedule the request

10:

2: Registration Request

11:

1: Personal Info

12:

6: Request for registration

9:

Sequence Diagram:HRAdmin-Login

: HR Admin : Login Form : Login Controller : Authenitaction Proxy : Authentication : Schedulling

Name and Passwd

Request for Login

Asking the proxy for req.

Forward the request to server

Ask for validationForward request to server

Get shortest job

Get least loaded server

Collaboration Diagram:HRAdmin-Login

: HR Admin : Login Form : Login Controller

: Authenitaction Proxy

: Authentication

: Schedulling


1: Name and Passwd

14:

2: Request for Login

13:

3: Asking the proxy for req.

12:

8: Forward request to server

9:

4: Forward the request to server11:

7: Ask for validation

10:

Sequence Diagram:Student-Login

: Student LF : Login Form LC : Login Controller : Schedulling AP : Authenitaction Proxy AE : Authentication

Name and PasswdRequest for login

Asking proxy to serve

Forwarding req. to server

Asking proxy for validating

Forwarding the request to server

Shortest Job

Least Loaded Server

Collaboration Diagram:Student-Login

: Student LF : Login Form LC : Login Controller

: Schedulling

AP : Authenitaction Proxy

AE : Authentication 5: Shortest Job6: Least Loaded Server

1: Name and Passwd

14:

2: Request for login

13:

3: Asking proxy to serve

12:

4: Forwarding req. to server11:

7: Asking proxy for validating

10: 8: Forwarding the request to server

9:

Sequence Diagram:HRAdmin-PaperCreation

: HR Admin UP : Upload Paper UI PC : Paper Controller : Schedulling PP : Paper Proxy QP : Ques Paper

Create PaperUpload paper file request

Asking to handle the requestForward the request

Pls. collect the paper and store

Forward the request

Get shortest job


Collaboration Diagram :HRAdmin-PaperCreation

: HR Admin UP : Upload Paper UI PC : Paper Controller

: Schedulling

PP : Paper Proxy

QP : Ques Paper


1: Create Paper

14:

2: Upload paper file request

13:

3: Asking to handle the request

12:

4: Forward the request

11:

7: Pls. collect the paper and store

10:


9:

Sequence Diagram:Student-Registration

: Registration : Registration Controller : Registration Form : Student : Schedulling : (Student)

Personal InfoRegistration Request Please schedule the request

Get shortest job


Request for registration Set Student Data

Collaboration Diagram:Student-Registration

: Student VR : View Result UI VC : View Result Controller

: Schedulling

ESDB : ExamStatisticDB

: Examination

1: Show result

7:

2: View result request for user

6:

3:

4:

5:

Sequence Diagram:HRAdmin-Report

: HR Admin SR : Exam statistics Report RC : Report Controller : Schedulling RP : Report Proxy SR : Statistics Report

Show reportGet report for particular exam

Ask for the reportForward the request

Give me the report

Forward the request

Get shortest job


Collaboration Diagram:HRAdmin-Report

: HR Admin SR : Exam statistics Report RC : Report Controller

: Schedulling

RP : Report Proxy

SR : Statistics Report


1: Show report

14:

2: Get report for particular exam

13:

3: Ask for the report

12:


11:

7: Give me the report

10:


9:

Sequence Diagram :SystemAdmin-User-Report

: System Admin RU : Report Request UI RP : ReportProxy RP : ReportRC : ReportController

Request for report (say load on each server)

Request for particular reportAsk the report proxy to process req

Forward the request

Collaboration Diagram :SystemAdmin-User-Report

: System Admin RU : Report Request UI RP : ReportProxy

RP : Report

RC : ReportController

1: Request for report (say load on each server)

8:

2: Request for particular report

7:

4: Forward the request5:

3: Ask the report proxy to process req

6:

: System Admin : Login Form : Login Controller : Authenitaction Proxy : Authentication


Asking the auth proxy of schduller for req.

Forward the request to auth server of schduller

Sequence Diagram :SystemAdmin-Login

Collaboration Diagram :SystemAdmin-Login

: System Admin : Login Form : Login Controller : Authenitaction Proxy

: Authentication

1: Name and Passwd

8:


7:

3: Asking the auth proxy of schduller for req.

6:

4: Forward the request to auth server of schduller5:

Sequence Diagram:SystemUser-Login

: System User : Login Form : Login Controller : Authenitaction Proxy : Authentication


Asking the auth proxy of schduller for req

Forward the req for login to auth server of schduller

Collaboration Diagram:SystemUser-Login

: System User : Login Form : Login Controller : Authenitaction Proxy

: Authentication

1: Name and Passwd

8:


7:

3: Asking the auth proxy of schduller for req

6:

4: Forward the req for login to auth server of schduller5:

IDL File

//IDL file for corba based client-server online testing application

module Farming_based_system{

interface Question{ attribute unsigned short current_question_paper ;

typedef sequence <string> question_paper ; //list of questions that are in one paper

typedef sequence<unsigned long> question_no_array; //list of questions previously answered by the candidate

exception QNFException {string reason;

};

exception ONSException {string reason;

};

exception CFException {string reason;

};

//get a question from the curren question paper such that it is not previously asked to the candidatevoid get_unique_question(in question_no_array prev_questions_nos , out string question)

raises (QNFException);

IDL Continued….

//verify the answer given by candiate.

void check_ans(in unsigned long question_no,in unsigned long ans_option, out boolean is_correct)

raises (ONSException);

//add to new question paper to the database

void add_question_set(in question_paper question_update)

raises (CFException);

//change the question paper for coming exam

void change_current_question_set(in unsigned long ques_set_no)

raises (CFException);

};

IDL Continued…

interface Authentication

{

struct Login_detail

{

string user_name;

string password;

};

exception InvalidLoginLException {

};

void validate_user(in Login_detail details , out boolean validated)

raises (InvalidLoginException);

};

IDL Continued…

interface Registration{

struct Regist_details{

string name;string password;string address;string sex;unsigned long phone_no;string email_id;

};

exception IDException {string reason;

};

//register user for testvoid register(in Regist_details details)

raises (IDException);

};

IDL Continued….

//get marks of particular student

void get_student_mark(in string stud_ID,out unsigned long marks)

raises (reportException);

//get marks of all students

void get_marks_report( stud_IDs student_ID,out marks student_marks)

raises (reportException);

};

};

IDL Continued…

interface report_manager{

struct pass_stud_report{

unsigned long total_registered_stu; unsigned long total_appeared_stu; unsigned long total_passed_stu;

};struct fail_stud_report{

unsigned long total_registered_stu;unsigned long total_appeared_stu;unsigned long total_failed_stu;

};typedef sequence<string> stud_IDs;//list of student idstypedef sequence <unsigned long >marks;//list of marks

exception reportException {string reason;

};

void get_pass_report(out pass_stud_report passed_stud)raises (reportException);

void get_fail_report(out fail_stud_report failed_stud) raises (reportException);

Database Connectivity

JDBCMysql

Schema…

examstats:

+--------------+---------+------+-----+---------+-------+


+--------------+---------+------+-----+---------+-------+

| month | int(11) | YES | | NULL | |

| year | int(11) | YES | | NULL | |

| t_registered | int(11) | YES | | NULL | |

| t_appeared | int(11) | YES | | NULL | |

| t_passed | int(11) | YES | | NULL | |

| t_failed | int(11) | YES | | NULL | |

+--------------+---------+------+-----+---------+-------+

Schema…

questionset :

+-------------+--------------+------+-----+---------+-------+


+-------------+--------------+------+-----+---------+-------+

| question_no | int(11) | | PRI | 0 | |

| question | varchar(255) | YES | | NULL | |

| opt1 | varchar(100) | YES | | NULL | |




| ans | int(11) | YES | | NULL | |

| section | varchar(25) | YES | | NULL | |

+-------------+--------------+------+-----+---------+-------+

GUI and Web Server

HTMLJSPServletsWeb Server -Tomcat(linux)

Beginning of the end

Thank you……….

Online Examination Using Farming Based System Ajay Anand(d0267003) Kapil More(d0267007) Sri...

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