career information maintenance system.doc

8/15/2019 Career Information Maintenance System.DOC

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INTRODUCTION

Career Information Maintenance is a project developed

for National Engineering Corporation. The main concept of Career

Information Maintanance is to computerize the users profile and

conduct online interviews.By using this system we can save time

and wor involved for employing people to the jo!s posted."or this

a separate section named placement cell is maintained !y thecompany which involves in selecting the right person for the right

jo!.#s there will !e more one person posting for a single jo!

online tests can !e conducted for the users at a time and all the

users will a!le to get the results within notime. $o this system of

implemention can !e followed !y any company.

Need to develop Career Information Maintanance: Now a day%s

time is !ecoming more and more precious.&''( industries are

computerized and there is a vast development in industries either in

the pu!lic sector or in the private sector.Today every company

wants to do any type of wor fast and with less investment. $omost of the companies are going for computerization where in time

and la!our involved in manual system will !e reduced such that

they can use these resources in other wor.

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)ere the company is the manufacturer of Transformers

and Stabilizers.

"or their growth of !usiness they want to employee people with in

less time.The placement cell has a list of jo!s !eing displayed for

the registered and unregistered users.The jo!seeers can not only

view the jo!s !ut also can post and tae online tests for that jo!.

$o the people who get *ualified and have the right sills are

employed. By this the company can select right employees and not

distur! their other activities. This will help them to !ecome a

num!er one position in the current competitive maret.

The another advantage is that the company is

having !ranches throughout the country. $o this system will help

them to employee people from anywhere for any !ranch. They

don%t need to involve in personally with the jo! seeers and go for

long procedures as followed in manual systems. It will give +n,

line solutions from the superiors to the jo!seeers after taing the

test so that immediately the wor is finished.

-iely there are so many advantages !y using

this Career Information Maintanance for a company lie NEC.


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Features:

$electing silled and professionally needed

person for the jo!.

$upport of multiple users.

By selecting the users for online test

selections can !e done within less time.

$elections can !e done for any !ranches of the

company.

ABOUT THE ORGANIZATION

N #TI+N#- EN/INEE0IN/ C+01+0#TI+N

2NEC3 is a

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1remier organization in India and it was esta!lished in 5une &678

to play a promotional role in the development of Transformers and

$ta!ilizers. It provides re*uirements to the corporate sector. The

last decade had witnessed NEC emerge as an agent of change that

has *uietly changed the wor culture and the process of decision.

The organization of NEC is located at )9:E0#B#:;

5EE:IMET-#. To meet the o!jectives; NEC%s infrastructure was

e


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88'@; A' to 8' )z3 current transformers !oth for metering and

protection. Current Transformers are manufactured generally

confirming to the Indian $tandards. The type class accuracy and

!urden of these transformers depends on the purpose for which

they are used. NEC #C @oltage $ta!ilizer provides cost,effective

solutions to pro!lems of fluctuations !y ensuring constant output

voltage. The field of application is very wide for #C $ta!ilizer.

eeping in view of the wide range of our country which spans

from ashmir to anyaumari NEC puts its !est effort to provide

good *uality supply.

The principal role played !y NEC; !esides changing the wor

culture and maing the administration more effective and efficient

at all levels; is in the nature of demolishing !arriers and in maing

the woring of the organization more transparent to the pu!lic; as

well as in maing the information more readily availa!le from one

:epartment to another. The availa!ility of information; accurately

and on a timely !asis; re*uired !y the officials concerned; has

given a new dimension to the management. NEC is proud that it

has made all this possi!le. ith this support today it is proud todeclare that it is going to launch its site on the INTE0NET.

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# major resource of NEC is its highly silled pool of

manpower . The main o!jective of NEC is

&.To design and develop Transformers and

$ta!ilizers.

. To generate; silled manpower within

departments.

ith the facility of having its site on the INTE0NET the

organization is going to e


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through out India has a large num!er of employees all over the

country.This company has people who are highly silled and

dedicated to the company.)ence forth if there are any jo!s present

here then they go for such *ualities in the employees.

Normally jo!s in a company will !e advertised and num!er

of people might send there resumes for the posts. The person; who

has to participate in the selections; has to travel all the way and

attend the conducted e


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person for the jo!.





company.

Need for comp#teri$ation:

Time plays an important role in today%s world. #ny

information is useful if it is availa!le on the right time. Duic and

correct information at he right time needs computerization. Many

scientists% engineers have to spend their valua!le time to attend a

conference; which is going on a long distance place. "or them even

one second costs millions and millions of dollars. $o this project

will help them to participate in the selecting right person for

companys development.


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)ere the company is the manufacturer of Transformers and

Stabilizers."or their growth of !usiness they want to employee

people with in less time.The placement cell has a list of jo!s !eing

displayed for the registered and unregistered users.The jo!seeers

can not only view the jo!s !ut also can post and tae online tests

for that jo!. $o the people who get *ualified and have the right

sills are employed. By this the company can select right

employees and not distur! their other activities. This will help

them to !ecome a num!er one position in the current competitive

maret.

The another advantage is that the company is

having !ranches throughout the country. $o this system will help

them to employee people from anywhere for any !ranch. They

don%t need to involve in personally with the jo! seeers and go for

long procedures as followed in manual systems. It will give +n,

line solutions from the superiors to the jo!seeers after taing the

test so that immediately the wor is finished.

-iely there are so many advantages !y usingthis Career Information Maintanance for a company lie NEC.

Features:

6


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person for the jo!.





company.

%AT&ORM'AC(AGE! !E%ECTED

&'


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)INDO)! NT:

indows NT is an operating system

developed !y Microsoft. Two versions of NT are availa!leF a

server version and a worstation version. Both share the same

architecture; !ut the server version is optimized for running server

operations; while the worstation version is intended for client

machines. indows NT worstation is focussed on providing a

destop operating system for solving comple< !usiness needs;

offering performance for systems such as dual,processor

worstation or multiprocessor 0I$C servers.

indows NT is a 4,!it operating system. It offers much greater

data transfer speed than a &8 !it operating system; !othwith in the processor and to peripherals; and it allows a

much larger memory space to !e addressed; !oosting

performance even more. The larger memory space means

that 4,!it operating systems have the !and width to offer

other processing advantages; such as the a!ility to run

different applications in separate memory spaces; perform

multitasing and so on.

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NT worstation re*uires a powerful system. # minimum

configuration of a ?8 1C with &8 M!ytes of 0#M and ''

M!ytes of hard dis is recommended !y the Microsoft.

indows NT worstation uses pre,emptive multitasing; which

allows users to run tass simultaneously; without losing system

performance. 1re,emptive multitasing assigns processing

resources e*ually !etween all the applications that are running;

slowing down all of them e*ually.

Multitasing; which is provided !y; NT is vital for taing

advantage of multiprocessing. It allows different parts of a

program to !e handled independently !y the operating systems

indows NT provides crash protection !y running applications in

separate address spaces. NT protects system resources !y giving

each application a mirror of the system resources within its own

spaces. If the application crashes only the mirrored resources; is

affected; while the real system resources; continues to function.

NT meets the security certification re*uirements for users level

security on access to a standalone worstation. "iles; folders and

application can !e made invisi!le to specific users. It also provides

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secure user profiles to control access to the destop applications

and system configuration files. # transacted file offers increased

data protection. NT worstation comes with the most common

networing protocols; including Netware; TC1GI1; I1HG$1HG $-I1

and 111. It also scala!le and runs on a variety of platforms.

#s more powerful mainstream machines are developed;

technologies created for NT worstation will migrate to indows

6A. The advantage is this compati!ility !rings to customers an

users are that applications can !e shared across the two operating

systems; that training needs are reduced as ease of use is increased

and the that the larger volume of application leads to lower

software and support cost.

HTM%:

To pu!lish information for glo!al distri!ution; one

needs a universally understood language; a ind of pu!lishing

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mother tongue that all computers may potentially understand. The

pu!lishing language used !y the orld ide e! is )TM-

2)yper Te


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in late &66?. )TM- 2&6643 and 2)TM-.4'J3 2&66A3 proposed

much richer versions of )TM-; despite never receiving consensus

in standards discussions; these drafts led to the adoption of new

features. The efforts of the )orld )ide )e* Con,orti#m.,

)TM- woring group to codify common practice in &668 resulted

in )TM- 4. 25anuary &6673. Most people agree that )TM-

documents should wor well across different !rowsers and

platforms. #chieving interopera!ility lowers costs to content

providers since they must develop only one version of a document.

If the effort is not made; there is much greater ris that the e!

will devolve into a proprietary world of incompati!le formats;

ultimately reducing the e!%s commercial potential for all

participants.

Ta*le,:

#uthors now have greater control over structure and

layout 2e.g. column groups3. The a!ility of designers to

recommend column widths user agents to display ta!le data

incrementally 2as it arrives3 rather than waiting for the entire ta!le

!efore rendering.

Compo#nd doc#ment,:

&A


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)TM- now offers a standard mechanism for

em!edding generic media o!jects and applications in )TM-

documents. The +B5ECT element 2together with its more specific

ancestor elements IM/ and #11-ET provides a mechanism for

including images; video; sound; mathematics; specialized

applications; and other o!jects in a document. It also allows

authors to specify a hierarchy of alternate renderings for user

agents that don%t support a specific rendering.

!t-le ,+eet,:

$tyle sheets simplify )TM- marup and largely

relieve )TM- of the responsi!ilities of presentation. They give

!oth authors and users control over the presentation of documents,

font information; alignment; colors; etc.

$tyle information can !e specified for specific elements or groups

of elements either within an )TM- document or in separate style

sheets. The mechanism for associating a style sheet with a

document is independent of the style sheet language. Before the

advent of style sheets; authors had limited control over rendering)TM- 4. included a num!er of attri!utes and elements offering

control over alignment; font size; and te


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relatively long time it taes for users to upgrade their !rowsers;

means that these features will continue to !e used for some time.

)owever; since style sheets offer more powerful presentation

mechanisms; the orld ide e! Consortium will eventually

phase out many of )TM-%s presentation elements and attri!utes.

!criptin/:

Through scripts; authors may create Ksmart formsL that

react at users fill them out. $cripting allows designers to create

dynamic e! pages; and to use )TM- as a means to !uild

networed applications. The mechanism provided to associate

)TM- with scripts are independent of particular scripting

languages.

rintin/:

$ometimes; authors will want to mae it easy for users

to print more than just the current document. hen documents

form part of a larger wor; the relationships !etween them can !e

descri!ed using the )TM- -IN element or using 4C%s

0esource :escription -anguage.

De,i/nin/ doc#ment, 0it+ HTM% 123:

&7


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The following general principles are o!served when

woring with )TM- ?.'

!eparate ,tr#ct#re and pre,entation

)TM- has its roots in $/M-; which has always

!een a language for the specification of structural marup. #s

)TM- matures more and more of its presentational elements and

attri!utes are !eing replaced !y other mechanisms; in particular

style sheets. E


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configurations. In order for documents to !e interpreted correctly;

designers should include in their document information a!out the

natural language and direction of the te


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5ava was conceived !y 5ames /osling; 1atric

Naughton; Chris arth; Ed "ran and Mie $heridan at $=N

Micro $ystems Inc Corporation in &66&. It too &months to

develop the first woring version. This language was initially

called +#; !ut was renamed 5#@# in &66A. Before the

initial implementation of +# in &66 and the pu!lic

announcement of 5ava in&66A; many more contri!uted to the

design and evolution of the language.

5A6A O6ER6IE):

5ava is powerful !ut lean on +!ject +riented

programming language. It has generated a lot of e


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standalone applications as well. It is !ecoming so popular that

many people !elieve it will !ecome standard language for !oth

general purpose and Internet programming.

There are many !uzzwords associated with 5ava;

!ut !ecause of its spectacular growth in popularity; a new !uzz

word has appeared am!iguous; Indeed; all indications are that it

will soon !e everywhere.

5ava !uilds on the strength of COO. It has taen the

!est features of COO and discarded the more pro!lematic and error

prone parts. To this lean core; it has added gar!age collection

2automatic memory management3; multithreading 2the capacity for

one program to do more than one thing at a time3; security

capa!ilities. The result is that 5ava is simple; elegant; powerful

and easy to use.

5ava is actually a platform consisting of three

componentsF

&. 5ava programming language. . 5ava is li!rary of classes and interfaces.

4. 5ava is a @irtual Machine.

The following sections will say more a!out these componentsF

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5A6A I! ORTAB%E:

+ne of the !iggest advantages 5ava offers is that it

is porta!le. #n application written in 5ava will run on all the major

platforms. #ny computer with a 5ava !ased !rowser can run the

applications or applets written in the 5ava programming language.

# programmer no longer has to write one program to run on a

Macintosh; another program to run on a indows machine; still

another to run on a =NIH machine; and so on. In other words;

with 5ava; developers write their programs only once. The @irtual

Machine is what gives 5ava its cross platform capa!ilities. 0ather

than !eing compiled into Machine language; which is different for

each operating systems and computer architecture; 5ava code is

compiled into !yte codes.

ith other languages; the program code is compiled

into a language that the computer can understand. The pro!lem is

that other computers with different machine instruction set cannot

understand that language. 5ava code; on the other hand is compiledinto !yte codes rather than a machine language. These !yte codes

go to the 5ava @irtual Machine; which e


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translates them into the language that is understood !y the machine

running it.

ith 5:BC #1I e


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The class paradigm allows one to encapsulate data

so that specific data values are those using the data can not see

function implementation. Encapsulation maes it possi!le to mae

the changes in code without !reaing other programs that use that

code. If for e


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developers have reported slashing development time !y as much as

two thirds. The following is a list of some of 5avas features that

mae it easier to write correct codeF

GARBAGE CO%%ECTION:

#utomatically taes care of allocating and de

allocating memory; a huge potential source of errors. If an o!ject

is no longer !eing used 2has no references to it3; then it is

automatically removed from memory; or /ar!age Collected.

1rogrammers dont have to eep trac of what has !een allocated

and de allocated themselves; which maes their jo! a lot easier;

!ut; more importantly it stops memory leas.

NO OINTER!:

Eliminates !ig source errors. By using o!ject

references instead of many pointers; pro!lems with pointer

arithmetic are eliminated; and pro!lems with inadvertently

accessing the wrong memory address are greatly reduced.

!TRONG T"ING:

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Cuts down on runtime errors. Because 5ava enforces strong

type checing; many errors are caught when code is compiled.

:ynamic !inding is possi!le and often very useful; !ut static

!inding with strict type checing is used when possi!le.

!IM%ICIT":

5ava is made easier to learn and use correctly. 5ava

eeps it simple !y having just one way to do something instead of

having several alternatives; as in some languages. 5ava also stays

lean !y not including multiple inheritance; which eliminates the

errors and am!iguity that arise when you create a su!class that

inherits from two or more classes. To replace capa!ilities; multiple

inheritance provides 5ava lets you add functionality to a class

throw the use of interfaces.

5A6A INC%UDE! A %IBRAR" O& C%A!!E! AND

INTER&ACE!:

The 5ava platform includes an e


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Both classes and interfaces contain data mem!ers

2fields3 and functions 2methods3; !ut there are major differences.

In a class; fields may !e either varia!le or constant; and methods

are fully implemented. In an interface; fields must !e constants;

and methods are just prototypes with no further implementations.

The prototypes give the method signature 2the return type; the

function name; and the num!er of parameters; with the type for

each parameter3; !ut the programmer must supply

implementations. To use an interface; a programmer defines a

class; declares that it implements the interface; and then

implements all the methods in that interface as part of the class.

These methods are implemented in a way that is

appropriate for the class in which the methods are !eing used.

Interfaces let one add functionality to a class and give a great deal

of fle


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7ava2lan/ 88 This pacage is so !asic that it is automatically

included in any 5ava program. It includes classes dealing with

numeric; strings; o!jects; runtime; security and threads.

5ava2io 88 Classes that manage reading data from input streams and

writing data to the output streams.

5ava2#til 88 Miscellaneous utility classes; including generic data

structures; !it sets; time; date; the string manipulation; random

num!er generation; system properties; notification and

enumeration of data structures.

5ava2net 88 Classes for networ support.

5ava2a0t 88Classes that manage user interface components such

as windows; dialog !o


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5ava2applet 88 The #pplet class; which provides the a!ility to write

applets; this pacage also includes several interfaces that connect

an applet to its document and to resources for playing audio.

5ava2,9l 88 The 5:BC #1I; classes and interfaces that access

data!ases and send $D- statements.

The first three pacages listed; java.lang; java.io;

and java.util form the foundation; they are the !asic classes and

interfaces for general,purpose programming. 5ava :evelopment

it @ersion&.& added some new pacages; with

5:BC is !eing one of them. +ther new pacages include such

things as 0emote Method Invocation; $ecurity and 5ava Beans the

new #1I for creating reusa!le components.

5A6A I! ETEN!IB%E:

# !ig plus for 5ava is the fact it can !e e


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e


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layout decisions. #s a result; a programmer not loos at a class

definition and figure out how it might !e laid in memory.

2 T+e 0a- cla,,e, are loaded: The 5ava !yte code loader; another

part of the virtual machine; checs whether classes loaded during

program e


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5A6A ER&ORM! )E%%:

5avas performance is !etter than one might e


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management; pointers and multiple inheritance. 5ava offers good

performance with the advantages of high level languages !ut

without the disadvantages of C and COO. In the world of design

trade,off; you can thin of 5ava as providing a very attractive

middle ground.

5A6A I! ROBU!T:

The multi platform environment of the EB places

e


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To understand how 5ava is ro!ust; consider two main reasons for

program failureF

Memory management mistaes and mishandled e


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!andwidth transmission over the Internet. In addition the 5ava

+perating $ystem offers a standalone 5ava platform that eliminates

host operating system overhead while still supporting the full 5ava

platform #1I. This maes 5ava ideal for low cost networ

computers whose sole purpose is to access the Internet.

5A6A I! MU%TITHREADED:

Multithreading is simply the a!ility of a program to

do more than one thing at a time. "or e


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#ctive 1rograms. "or e


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provides a standard #1I for toolGdata!ase developers and maes

it possi!le to write data!ase applications using a pure 5ava #1I.

=sing 5:BC; it is easy to send $D- statements to

virtually any relational data!ase. In other words; with the 5:BC

#1I; it is not necessary to write one program to access a $y!ase

data!ase; another program to access a +racle data!ase; another

program to access a Informi< data!ase; and so on.. +ne can write a

single program using the 5:BC #1I; and the program will !e a!le

to send $D- statements to the appropriate data!ase. #nd with in an

application written in 5ava programming language; one also doesnt

have to worry a!out writing different applications to run on

different platforms. The com!ination of 5ava and 5:BC lets a

programmer to write it once run it anywhere.

5ava; !eing ro!ust; secure; easy to understand; and

automatically downloaded on a networ; is an e


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we! page containing an applet that uses information o!tained from

a remote data!ase or an enterprise can use 5:BC to connect all this

employees 2even if they are using conglomeration of indows;

Macintosh; and =ni< machines3 to one or more internal data!ases

via an Internet. ith more and more programmers using the 5ava

programming language; the need for easy data!ase access from

5ava is continuing to grow.

MI$ managers lie the com!ination of 5ava and 5:BC

!ecause it maes disseminating information easy and economical.

Businesses can continue to use their installed data!ases and access

information easily even of it is stored on different data!ase

management systems. :evelopment time for new applications is

short. Installation and version controls are greatly simplified. #

programmer can write an application or an update once; put it on

the server; and every!ody has access to the latest version. #nd for

!usiness selling information services; 5ava and 5:BC offer a !etter

way of getting out information updates to e


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&. Esta!lish a connection with the data!ase

. $end $D- statements

4. 1rocess the results

The following code fragment gives a !asic e


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program that must !e e


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"ig. E


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with 5avaF for e


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+:BC Bridge. The *uestion now !ecomes Shy do you need

5:BC%R There are several answers to this *uestionF

&. +:BC is not appropriate for direct use from 5ava; !ecause it

uses a C interface. Calls from 5ava to native C,code have a

num!er of draw!acs in the security; implementation ro!ustness

and automatic pro!a!ility of applications.

. # literal translation of the +:BC C #1I into a 5ava #1I would

not !e desira!le. "or e.g.; 5ava has no pointers; and +:BC

maes copious use of them; including the notoriously error,

prone generic pointer Kvoid L. 9ou can thin of 5:BC ac

+:BC translated into an o!ject,oriented interface that is natural

for 5ava programmers.

4. +:BC is hard to learn. It mi


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drivers must !e manually installed on every client machine.

hen the 5:BC driver is written completely in 5ava; however;

5:BC code is automatically installa!le; porta!le; and secure on

all 5ava platforms from networ computers to mainframes.

In summary; the 5:BC #1I is a natural

5ava interface to the !asic $D- a!stractions and concepts. It

!uilds on +:BC rather than starting from scratch; so

programmers familiar with +:BC will find it very easy to learn

5:BC. 5:BC returns the !asic design features of +:BCP in fact

!oth interfaces are !ased on the 2HG+pen $D- C-I 2Call -evel

Interface3. The !ig difference is that 5:BC !uilds on end

reinforces the style and virtues of 5ava; and; of course it is easy

to use.

More recently; Microsoft has introduced new #1Is

!eyond +:BCF 0:+; #:+; and +-E dB. These designs move

in the same direction as 5:BC in many ways; that is; in !eing an

o!ject,oriented data!ase interface !ased on classes that can !e

implemented on +:BC. )owever; there is no compellingfunctionality in any of these interfaces to mae them an

alternative !asis to +:BC; especially with +:BC driver maret

well esta!lished. Mostly they represent a thin veneer on +:BC.

?A


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This is not to say that 5:BC does not need to evolve from the

initial releaseP however; the general feeling is that most new

functionality !elongs in higher,level #1Is such as the

o!jectGrelational mappings and em!edded $D- mentioned in the

previous section.

T+,TIE0 #N: T)0EE,TIE0 M+:E-$F

The 5:BC #1I supports !oth two,tier and three,

tier models for data!ase access. In the two,tier model; # 5ava

applet or application tals directly to the data!ase. This re*uires a

5:BC driver that can communicate with the particular data!ase

management system !eing accessed. # user%s $D- statements are

delivered to the data!ase; and the results of those statements are

sent !ac to the user. The data!ase may !e located on another

machine to which the user is connected via a networ. This is

referred to as a clientGserver configuration; with the user%s machine

as the client; and the machine housing the data!ase as the server.

The networ can !e the Intranet; which; for e


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"ig. Two,tier #rchitecture

In the three,tier models; commands are send to a

middle,tier of services; which then send $D- statements to the

data!ase. The data!ase process the $D- statements and then send

the results !ac to the middle tier; which then sends them to the

user. MI$ directors find the three,tier model very attractive

!ecause the middle tier maes it possi!le to maintain control over

access and the inds of updates that can !e made to corporate data.

Client

$erver

?7

Presentation

FunctionalityApplication

ServerData Server

DATARDBMSLegacy

applicationRemote


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"ig. Three,Tier #rchitecture

=ntil now the middle tier has typically !een written in

languages such as C or COO; which offers fast performance.

)owever; with the introduction of optimizing compilers that

translate 5ava B9TEC+:E into efficient machine,specific code; it

is !ecoming practical to implement the middle tier in 5ava. This is

a !ig plus; maing it possi!le to tae advantage of 5avas

ro!ustness; multithreading; and security features. 5:BC is

important to allow data!ase access from 5ava middle tier.

!% ER&OMANCE:

$tructured Duery -anguage 2$D-3 is the standard

language for accessing relational data!ases. +ne area of difficulty

is that most :BM$ use a standard form of $D- for !asic

functionality; they do not conform to the most recently defined

standard $D- synta< or semantics for more advanced functionality.

"or e


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more and more functionality. In the mean time; the 5:BC #1I

must support $D- as it is.

+ne way the 5:BC #1I deals with this pro!lem is to

allow any *uery string to !e passed through to an underlying

:BM$ driver. This means that application is free to use as much

$D- functionality as desired; !ut it runs the ris of receiving an

error on some :BM$. In fact; an application *uery need not even

!e $D-; or it may !e a specialized derivative of $D- designed for

specific :BM$ 2for document or image *ueries; for e


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that applications adapt to the re*uirements and capa!ilities of each

:BM$.

Because the 5:BC will !e used ad a !ase #1I for

developing higher,level data!ase access tools and #1Is; it also has

to address the pro!lem of conformance for any thing !uilt on it.

The designation 5:BC C+M1-#INT was created to set a

standard level of 5:BC functionality on which the users can rely.

In order to use this designation; a driver must support at least;

#N$I $D-, Entry level. 2#N$I $D-, refers to the standard

o!tained !y the #merican National $tandards Institute in &66.

Enter level refers to a specific list of $D- capa!ilities.3 :river

developers can ascertain that their drivers meet these standards !y

using the test suite availa!le with the 5:BC #1I.

The 5:BC C+M1-#INT designation indicates that a

vendors 5:BC implementation has passed the conformance tests

provided !y 5ava$oft. These performance tests chec for the

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5:BC #1I !y data!ase vendors; connectivity vendors; Internet

$ervice @endors; and application writers; 5:BC is *uicly

!ecoming the standard for 5ava data!ases.

5DBC RODUCT!:

#t present; a num!er of 5:BC,!ased products have

already !een developed or under development. +f course; the

information in this section will *uicly !ecome dated; so one

should consult the 5:BC we! page

=0-FhttpFGGwww.javasoft.comGproductsGjd!c for the latest

information.

5ava!oft &rame 0or=:

5ava $oft provides three 5:BC product components as a

part of the 5ava :evelopment it 25:3F

• the 5:BC driver manager

• the 5:BC driver test suit; and

• the 5:BC,+:BC !ride

The 5:BC driver manager is the !ac!one of the

5:BC architecture. It actually is *uite small and simpleP its

A&


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primary function is to connect the 5ava applications to the

correct 5:BC driver and then get out of the way.

The 5:BC driver test suite provides some confidence

that 5:BC drivers will run your program. +nly drivers that pass

the 5:BC driver suite can !e designated 5:BC C+M1-#INT.

The 5:BC,+:BC !ridge allows +:BC drivers to !e

used as 5:BC drivers. It was implemented as a way to get 5:BC

off the ground *uicly; and long term will provide a way to access

some of the less popular :BM$ if 5:BC drivers are not

implemented for them.

5DBC DRI6ER T"E!:

The 5:BC drivers that are availa!le at this time fit into

one of the four categoriesF

&. 5:BC,+:BC !ridge plus +:BC driverF The 5ava$oft !ridge

product provides 5:BC access via +:BC drivers. Note that+:BC !inary code; and in many cases data!ase client code;

must !e loaded on each client machine that uses this driver.

A


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#s a result; this ind is most appropriate on a

corporate networ where client installations are not a major

pro!lem; or for application server code written in 5ava in a

three,tier architecture.

. Native,#1I partly,5ava driverF This ind of driver converts

5:BC calls into calls on the client #1I for +racle; $y!ase;

Informi


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?. Native,protocol pure 5ava driverF This ind of driver converts

5:BC calls into the networ protocol used !y the :BM$

directly. This allows a direct call from the client machine to the

:BM$ server and is a practical solution for Internet access.

$ince many of these protocols are proprietary; the data!ase

vendors themselves will !e the primary source; and several

data!ase vendors have these in progress.

A. Eventually; it is e


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The following chart shows the four categories and their

propertiesF

:0I@E0 C#TE/+09 #-- 5#@# NET

10+T+C+-

&. 5:BC,+:BC !ridge No :irect

. Native #1I as !asis No :irect

4. 5:BC, Net Connector 9es 0e*uires

?. Native protocol as !asis 9es :irect

5DBC INTER&ACE!:

Connection Overvie0:

# connection o!ject represents a connection with a

data!ase. Connection session includes the $D- statements that are

e


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referred to as the 5:BC manager layer; attempts to locate a driver

than it connect to the data!ase represented !y that =0-. The

:riverManager class maintains a list of registered :river classes;

and when the method getConnection is called; it checs with each

driver in the list until it finds one that can connect to the data!ase

specified in the =0-. The driver method connects uses this =0- to

actually esta!lish the connection.

The user can !y pass the 5:BC management layer and

call driver methods directly. This could !e useful in the rare case

that two drivers can connect to a data!ase and the user user wants

to e


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of the drivers that are availa!le and handles esta!lishing a

connection !etween a data!ase and the appropriate driver. In

addition; the :riverManager class attends to things lie driver

login time limits and the printing of log and tracing messages.

"or simple applications; the only method in this class

that a general needs to use directly is

:riverManager.getConnection. #s its name implies; this method

esta!lishes a connection to a data!ase. 5:BC allows the user to call

the :riverManager methods get:river; get:rivers; and

register:river as well as the driver method connect; !ut in most

cases it is !etter to let the :riverManager class manage the details

of Esta!lishing a Connection $tatementF

!tatement Overvie0:

# statement o!ject is used to send $D- statements

to a data!ase. There are actually three inds of statement o!jects;

all of which act as containers for e


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o!ject is used to e


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changing the )TM- files themselves. #ll of these common items

are contained in a single fileUcalled the template file.

AD6ANTAGE!:

The o!vious advantage of using the )TM-

Templates feature is that you can esta!lish; and later update; the

way multiple files appear all from one template file. This is

especially helpful in cases where content is created !efore the

presentation is decided or when content from multiple origins must

!e com!ined into some cohesive presentation. 0ather than go !ac

and edit all those files; you simply create a template filewhich

uniformly applies the desired presentation elements.

Besides the application of headers and footers to

your )TM- files; you can also define !ody content to appear

!efore or after the content of the source )TM- documents. This

can !e a simple !ut powerful way of including information.

)+at t+e 5ava )e* !erver Doe,

A6


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#nd; under the $ervlets Invoed column; template.

If there is no entry for Gtemplate in the #lias

column; select the last entry in the #lias field; clic #dd. This will

create a new entry space into which you should type Gtemplate. )it

ta! ey to move to the $ervlet Invoed column and then type

template.

)ell formed HTM% &ile:

Be sure that your source )TM- files 2to which the

templates will !e applied3 are Kwe W formedL. This means that the

)TM- is correctly formed with an opening X)TM-Y tag; a headsection enclosed !y X)E#:YXG)E#:Y tags; a !ody section enclosed

!y XB+:9YXGB+:9Y tags; and a closing XG)TM-Y T#/. The

template servlet%s parser is very strictUif you don%t have proper

marup; you may see pages with no content.

The default template file goes in the document !ase

directory. In general; there needs to !e only one default template

file per document set. )owever; lie the default template files;

more can !e used in su!directories to override attri!utes present in

the parent default template file.

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To #,e t+e Template, feat#re:

&. $pecify the Common Elements

Create a file with named default template. This

template file should he a well,formed )TM- file containingF

opening )TM- tag; a )E#: section; a B+:9 section; and a

closing )TM- tag. Insert one or more presentations; elements into

the desired locations in the template file W just as you would insert

these elements into any )TM- files.

$ome of the presentation elements we might want

to apply to our files include :ocument color scheme 2for e


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source document%s )E#: section into the )E#: section of the

template file

B: In t+e BOD" ,ection F,#*,et dataBOD"F',#*,t

This is another )TM- e


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c. =nder Configure; scroll down to template

d. Clic on template

# ta!!ed note!oo will !e shown. The

Configuration of the note!oo tells you the full class name of the

templates. These are also -oaded at $tartup and -oaded Now

entries on the page; these should !oth indicates 9es. If they do not;

then set them to 9es !y pressing the 9es radio !utton.

&. Indicates the files to which the Templates should !e applied

$pecifying the files to which the template should !e applied

involves using the $ervlet #lias feature of the 5ava e!

$erver%s #dministration Tool. Brief instructions are provided

!elow. "or more information on mapping files or directories top

servlet aliases; see $ervlet #lias.

To map a set of files to a servlet alias; in the

#dministration ToolF

a. $elect e! $ervice and clic Manage

!. Clic the $etup !utton.

c. :ou!le,clic $ervlet #liases.d. In the #lias column; enter the G template directory or

a filename pattern 2such as html3 to which the alias

will apply.

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e. In the $ervlet Invoed co lumen; type template. This

will map the directory to the servlet alias template.

=se of )TM- "ramesF

The template file cannot read in a frame set

from a source file !ecause only the contents of the )E#: section

and the B+:9 section are copied. )owever; there is nothing to

stop you from using files processed !y the template servlet as

content in your own frame set.

$ervletsF

$ervlets provide a 5ava !ased solution used to

address the pro!lems currently associated with doing server,side

programming; including ine


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loada!le; plugga!le helper !yte code o!jects on the server side that

can !e used to dynamically e


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A. $ecure,even when downloading across the networ; the servlet

security model and servlet sand!o< protects your system from

unfriendly !ehavior.

T+e Advanta/e of t+e !ervlet AI:

+ne of the great advantages of the $ervlets #1I is

protocol dependence. It assumes nothing a!outF The protocol !eing

used to transmission the )ow it is loaded The server environment

it will !e running in these *ualities are important; !ecause it

allows the $ervlet #1I to !e em!edded in many different inds of

servers. It%s e


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4. $erver,$ide IncludesF ,$ervlets can !e invoed from

dynamic )TM- documents using tags.

?. 0eplacing C/I $criptF , $ervlets are an effective su!stitute

for C/I script; and provide a faster and cleaner way to generate

dynamic document.

!ER6%ET!

Introd#ction to !ervlet,:

The 5ava$erver product family provides servers that

can !e configured to run one or more servicesF !odies of the code

that implement an application W level protocol; such as "T1;

:)C1; +0 $MT1. $ervlets are modules that run inside re*uest G

response,oriented services and e


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!ervlet, Arc+itect#re Overvie0:

The central a!straction in the 5$: is the $ervlets

interface. #ll servlets implement this interface; either directly or;

more commonly; !y e


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from clients that are using application protocols such as the )TT1

1+$T and 1=T methods. $u!classes of $ervlet 0e*uest allow the

servlet to retrieve more protocol,specific data. "or e


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can also remove $ervlets. They are the steps of a $ervlets life

cycle. The ne


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save manner. "or e


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$ervlets that manage resources do so !y overriding the

lifecycle methods init and destroy. These servlets might need to !e

given argument at startup; in order to initialize correctly.

Overridin/ t+e Init Met+od:

:uring initialization; the servlet should prepare the

resources it manages; to ready the servlet for accepting service

re*uests. It can do this without regard for multi,threading

concerns; since there is only a single thread running on !ehalf of

the servlet during initialization. #s soon as the init method returns;

the servlet can receive client re*uests. If; for some reason; the

servlet%s re*uired resources cannot !e made availa!le 2for e


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you should store the $ervletConfig o!ject yourself; and override

the get$ervletConfig method so that it can o!tain the o!ject from

its new location.

#s you can see; this init method calls the super. init

method to manage the $ervletConfig o!ject. The init method also

sets a field; results:ir; with the directory name that is provided as

an initialization parameter. It no directory name is provided; the

servlet throws an unavaila!le e


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that initialization; this is not re*uired. "or e


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applets in that they are faceless o!jects 2without graphics or a /=I

component3. They serve as platform independent; dynamically

loada!le; plugga!le helper Byte Code o!jects on the server side

that can !e used to dynamically e


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tags. #re secure , even when downloading across the networ; the

servlet security model and $ervlet sand!o< protect your system

from unfriendly !ehavior.

T+e Advanta/e, of t+e !ervlet AI:

+ne of the great advantages of the $ervlet #1I is

protocol Independence. It assumes nothing a!outF

The protocol !eing used to transmit on the net

)ow it is loaded

The server environment it will !e running in

These *ualities are important; !ecause it allows the $ervlet

#1I to !e em!edded in many different inds of servers. There are

other advantages to the $ervlet #1I as well.

These includeF its e


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The 5ava $erver uses mime types to call servlets se*uentially.

$erver,$ide IncludesF $ervlets can !e invoed from dynamic

)TM- documents using server,side include tags. 0eplacing C/I

$criptsF $ervlets are an effective su!stitute for C/I scripts; and

provide a faster and cleaner way to generate dynamic documents.

INTERNA% !ER6%ET!:

The 5ava TM e! $erver TM servlet architecture is

very fle


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loads the servlet if necessary; invoes that servlet; and sends

the output of the servlet to the client at the point where the

servlet tag was em!edded.

• Admin !ervlet :

The #dmin servlet facilitates administration of the

5ava we! server through a /=I front end the #dministration

Tool.

• CGI !ervlet :

This servlet acts as a gateway for the C/I &.&

interface. This servlet allows any program that utilizes the

C/I &.& standard to operate under 5ava e! $erver.

!"!TEM CO&IGURATION

!oft0are Detail,

$erver +peration $ystem

indows NT $erver

Client +perating $ystemindows NT or $tation

-anguages =sedF

5ava .'2$ervlets;5sp; 5d!c;

+:BC;TomcatA.'3

76


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)TM-;

:ataBase F

+racle.

Hard0are Detail,

!erver

1ENTI=M III A'' M)z; ith :ual 1rocessor

&MB 0#M

A8 B EHTE0N#- C#C)E MEM+09

&7 /B )#0: :I$

4 BIT ET)E0 NET

'


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$@/# C+-+0 M+NIT+0

MIC0+$+"T M+=$E

&' IN:+$%6A E9B+#0:

Client

1ENTI=M II A'' M)z

8? MB 0#M

A8 B EHTE0N#- C#C)E MEM+09

/B )#0: :I$

4 BIT ET)E0NET

$@/# C+-+0 M+NIT+0

-+/ITEC) M+=$E

&'A IN:+$%6A E9B+#0:

%OGICA% DE!IGN

-ogical design is a process through which re*uirements

are translated into a representation of software. Initially the

representation depicts a holistic view of software. $u!se*uent

refinement leads to a design representation that is very close to

source code.

&


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The conceptual structure of a data!ase is called a schema.

$chema shows the inds of data that e


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represent four inds of system components. 1rocesses; :ata $tores;

E


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Data &lo0,

:ata "lows model the passage of data on the system

and represented !y the lines joining the system components. #n

arrow indicates the direction of flow and line is la!eled !y the

name of data flow. "low of data in the system can tae place

Between two processes

"rom a data store to a process

"rom a process to a process

"rom source to a process

"rom a process to a sin.

Arc+itect#ral 6ie0 of CIM!

?

!erver

on

Internet

'Intranet

Client

ClientClient

Client


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:": "or $erver

A

Server Get

Jobseeke sr

Details

Necdata

Add

persomns

to jobkeers


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:": "or Client

DATABA!E DE!IGN

8

Client Entry

check

process

Gettin

jobs list

from

server

!ostin

"es#me


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;2Ta*le Name:Re/i,ter

Name N#ll T-pe

88888888888888888888888888888888888888888 88888888 88888888888

U!ERNAME NOT NU%% 6ARCHAR


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!(I%%! 6ARCHAR


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Two main types of testing have !een carried out to

ensure that this system is a *uality product; namely the Unit

Te,tin/ and Inte/ration Te,tin/2

Unit Te,tin/:

=nit Testing focuses verification effort on the smallest

unit of software design module. =sing the detailed description as a

guide; important control paths are tested to uncover errors within

the !oundary of the module. The various modules that have

undergone types of input data were given to ensure the

consistency of the module and to ensure that information properly

flows into and out of the program unit under test. The data!ase

integrity is validated during all steps in the e


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integration testing namely; Top8Do0n Inte/ration and Bottom8

Up Inte/ration. "or the system a com!ination of !oth the types

nown as !and0ic+ Te,tin/ has !een used. The Top,:own

Integration was used during the integration of the various Masters

and the Bottom,up Integration method was used during the

integration of the various modules of the process generation and

the report generation.

The various validations done in this system are given !elowF

Client %o/in !creen:

• The client name is checed; whether it e


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IN!TA%%ATION AND MAINTENANCE

The CIM$ project can !e installed on the computer using the setup

program. It decomposes and installs the files in the appropriate

directories.

T+e Hard0are and !-,tem Re9#irement,

To run the project; certain hardware and software has to !e

installed on the system. The system re*uirements include

• Microsoft indows NT worstation.

• '?8 of higher microprocessor.

• # hard dis with a minimum of A' mega!ytes availa!le space

for a full installation.

• $@/# or higher,resolution screen supported !y Microsoft

indows.

• 4 MB 0#M.

• &.??%% floppies drive.

6


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• # mouse or other suita!le pointing device.

CONC%U!ION

The o!jective of this project is to computerize the users

profile and conduct online interviews . Instead of conducting

selections !y going to respective !ranch place we can select them

from main company through placement cell and employee them in

need !ranch.

By using this project they can

64


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Conduct conferences with their jo! seeers online from the

different !ranches of the company.

The another advantage is that the company is having !ranches

throughout the country so this will help them to communicate

!usiness re*uirements of the company and have up,to,date

information.

By seeing the jo! re*uirement only person having re*uired

sills will post their resumes so no need of short listing.

+n,line tests will still more reduce the wor of the company

and results immediately will clear out the wor.

-iely there are so many advantages !y developing this

maintenance system.

BIB%IOGRAH"

6?


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• 1atric Naughton and )er!ert $hildt ; K The complete

reference 5ava .'.

• 5oseph -. we!er; S =sing 5ava .' S ; 1)I 1u!lishers.

• arl Moss; S 5ava $ervlets S.

• 5ason )unter with illiam Crawford ; S5ava $ervlet

1rogramming S $1: pu!lications.

• 0oger $ 1ressman; S $oftware Engineering% ; Mc/raw )ill Inc.;

4rd Edition; &66.

• 0oughs pu!lications;%5ava $erver 1rogramming &.4%.

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