Basics of SOA

8/10/2019 Basics of SOA

1/67

Basics of SOA Testing

Author : Manas Ranjan Dhal


2/67

J anuary25, 2012

Contents

What is SOA?

Traditional MVC vs SOA

Why SOA needed?

What is Web service and itssignificance?

What is WSDL?

What is SOA !rotocol andits significance?

"ntrod#ction to SOA testing

Challenges in SOA testing

Test A!!roach With SOA

$o% %e overco&e the

challenges'

"ntrod#ction to arasoft SOAtest tool'

Concl#sion


3/67

J anuary25, 2012

What is SOA

Service(Oriented Architect#re )SOA* is an architect#ral style

A!!lications b#ilt #sing an SOA style deliver f#nctionality as services

)e'g Create C#sto&er+ ,et C#sto&er "nfo+ Add Acco#nt f#nctionalities

in a ban-ing do&ain* that can be #sed or re#sed %hen b#ilding

a!!lications or integrating %ithin the enter!rise or trading !artners'

A service(oriented architect#re is essentially a collection of services

%hich is based on heterogeneo#s technologies'


4/67

J anuary25, 2012

Traditional MVC vs SOA MVC divides the a!!lication into !resentation+ b#siness f#nctions+

and data access layers'

resentation i&!le&ented %ith /S0servlets' 1#siness logic

i&!le&ented %ith O/Os or 2/1s' Data access logic i&!le&ented

%ith /A0$ibernate

$ere each b#siness f#nction %ill have its o%n set of controller logicand solely de!endent on the a!!lication and technology it

i&!le&ented %ith'

With SOA+ the b#siness f#nctions can be abstracted o#t of the core

a!!lication !rocesses and se!arated as re#sable services' The

services can no% be #sed %ith other a!!lications inde!endent oftechnology and !latfor&' The services allo% for ch better

co&!onent creation+ and allo%s for ease of great things li-e single

sign on+ data syncing+ sec#rity+ fle3ibility etc


5/67

J anuary25, 2012

Why SOA

The reality in "T enter!rises is that infrastr#ct#re is heterogeneo#sacross o!erating syste&s+ a!!lications+ syste& soft%are+ anda!!lication infrastr#ct#re'

2nter!rises sho#ld 4#ic-ly res!ond to b#siness changes %ith agility '1#t so&e e3isting a!!lications are #sed to r#n c#rrent b#siness

!rocesses+ so starting fro& scratch to b#ild ne% infrastr#ct#re isn5t ano!tion'

SOA %ith its loosely co#!led nat#re allo%s enter!rises to !l#g in ne%

services or #!grade e3isting services in a gran#lar fashion to address

the ne% b#siness re4#ire&ents+ !rovides the o!tion to &a-e the

services cons#&able across different channels+ and e3!oses thee3isting enter!rise and legacy a!!lications as services+ thereby

safeg#arding e3isting "T infrastr#ct#re invest&ents'


6/67

J anuary25, 2012

Benefits Of SOA

latfor& and technology inde!endent'

Mod#lari6ed and less co&!le3'

Lo% integration cost'

Sec#re and reliable'

Loosely co#!led'

Change is easy'

7e(#sable across the b#siness channels'


7/67

J anuary25, 2012

We Service

The W8C defines a 9Web service9 as 9a soft%are syste& designed to

s#!!ort intero!erable &achine(to(&achine interaction over a

net%or-9'

"t has an interface described in a &achine(!rocessable for&at

)s!ecifically Web Services Descri!tion Lang#age+ -no%n by theacrony& WSDL*'

Other syste&s interact %ith the Web service in a &anner !rescribed

by its descri!tion #sing SOA)Si&!le Ob:ect Access rotocol*

&essages+ ty!ically conveyed #sing $TT'


8/67

J anuary25, 2012

WSD! The We Services Descri"tion !anguageis an ;ML(based lang#age

that is #sed for describing the f#nctionality offered by a Web(Service'

A WSDL descri!tion of a %eb service !rovides a &achine(readable

descri!tion of ho% the service can be called+ %hat !ara&eters it

e3!ects+ and %hat data str#ct#res it ret#rns' "t th#s serves a ro#ghly

si&ilar !#r!ose as a &ethod signat#re in a !rogra&&ing lang#age'

WSDL is often #sed in co&bination %ith SOA and an ;ML Sche&ato !rovide Web services over the "nternet'

A client !rogra& connecting to a Web service can read the WSDL file

to deter&ine %hat o!erations are available on the server' Any s!ecial

dataty!es #sed are e&bedded in the WSDL file in the for& of ;ML

Sche&a' The client can then #se SOA to act#ally call one of the

o!erations listed in the WSDL file #sing ;ML or $TT'


9/67

J anuary25, 2012

WSDL Doc#&ent Str#ct#re

A WSDL doc#&ent describes a %eb service #sing these &a:or ele&ents A container for data ty!e definitions #sed by the %eb service

=&essage>A ty!ed definition of the data being co&nicated

=!ortTy!e> A set of o!erations s#!!orted by one or &ore end!oints

=binding> A !rotocol and data for&at s!ecification for a !artic#lar !ort

ty!e


10/67

J anuary25, 2012

WSDL Doc#&ent Str#ct#reWSDL orts

The =!ortTy!e> ele&ent is the &ost i&!ortant WSDL ele&ent' "t describes a

%eb service+ the o!erations that can be !erfor&ed+ and the &essages that

are involved'The =!ortTy!e> ele&ent can be co&!ared to a f#nction library

)or a &od#le+ or a class* in a traditional !rogra&&ing lang#age'

WSDL Messages

The =&essage> ele&ent defines the data ele&ents of an o!eration'2ach

&essage can consist of one or &ore !arts' The !arts can be co&!ared to the

!ara&eters of a f#nction call in a traditional !rogra&&ing lang#age'

WSDL Ty!es

The =ty!es> ele&ent defines the data ty!es that are #sed by the %eb service'or

&a3i& !latfor& ne#trality+ WSDL #ses ;ML Sche&a synta3 to define data

ty!es'

WSDL 1indings

The =binding> ele&ent defines the data for&at and !rotocol for each !ort ty!e'


11/67

J anuary25, 2012

Str#ct#re of a WSDL=definitions>

=ty!es>

data ty!e definitions''''''''

=0ty!es>

=&essage>

definition of the data being co&nicated''''=0&essage>

=!ortTy!e>

set of o!erations''''''

=0!ortTy!e>

=binding>

!rotocol and data for&at s!ecification''''

=0binding>

=0definitions>


12/67

J anuary25, 2012

Ty"ical Service #nteractions


13/67

J anuary25, 2012

SOA$ SOA stands for Si&!le Ob:ect Access rotocol

SOA is a co&nication !rotocol for co&nication bet%een

service based a!!lications

SOA is a for&at for sending &essages

SOA relies on other a!!lication layer !rotocols+ li-e $y!erte3t

Transfer rotocol )$TT* or Si&!le Mail Transfer rotocol )SMT*+for &essage negotiation and trans&ission

SOA is !latfor& inde!endent

SOA is lang#age inde!endent

SOA is based on ;ML SOA is si&!le and e3tensible

SOA allo%s yo# to get aro#nd fire%alls


14/67

J anuary25, 2012

Why SOA$

Today5s a!!lications co&nicate #sing 7e&ote roced#re Calls

)7C* bet%een different ob:ects'

7C re!resents a co&!atibility and sec#rity !roble&@ fire%alls and

!ro3y servers %ill nor&ally bloc- this -ind of traffic'

A better %ay to co&nicate bet%een a!!lications is over $TT+beca#se $TT is s#!!orted by all "nternet bro%sers and servers'

SOA %as created to acco&!lish this'

SOA !rovides a %ay to co&nicate bet%een a!!lications r#nning

on different o!erating syste&s+ %ith different technologies and

!rogra&&ing lang#ages'


15/67

J anuary25, 2012

SOA$ Synta%

A SOA &essage is an ordinary ;ML doc#&ent containing the follo%ingele&ents

Documents

Basics of SOA