WSBook Fig Ch6

8/22/2019 WSBook Fig Ch6

1/18

service providerservice requestor

application object(client)

application object(service provider)

SOAP-basedmiddleware


SOAP messagesexchanged on top of,HTTP, SMTP, or othertransport

converts procedure calls to/from XML

messages sent through HTTP or other

protocols.

Copyright Springer Verlag Berlin Heidelberg 2004


2/18


application object

(client)

application object

(service provider)

stub skeleton

WSDL ofservice provider

WSDL compiler(server side)

WSDL compiler(client side)



SOAP messages



3/18

service descriptions

SOAP-based middleware

UDDI registry




stub skeleton



SOAP messages

SOAP messages(to look for services)

SOAP messages(to publish service description)

Copy

rightSpringerVerlagBerlinHeidelberg2004


4/18

SOAP envelope

SOAP header

header block

SOAP body

body block



5/18

SOAP envelope

SOAP body

PurchaseOrderdocument

-product item-quantity

SOAP envelope

SOAP body

Acknowledgementdocument-order id

SOAP envelope

SOAP body

method nameorderGoods

input parameter 1product item

input parameter 2quantity

SOAP envelope

SOAP body

method return

return valueorder id

(a) Document-style interaction

(b) RPC-style interactionCopyright Springer Verlag Berlin Heidelberg 2004


6/18


7/18

57539

ACME Softener

35

header

body

blocks

envelope



8/18

service provider

SOAPengine

service implementation(other tiers)

HTTPengine

service requestor

HTTPengine

client implementation(other tiers)

SOAPengine

SOAP envelope

SOAP header

transactionalcontext

SOAP body

name of theprocedure

input parameter 1

input parameter 2

HTTP Post

SOAP envelope

SOAP header


SOAP body

returnparameter

SOAP envelope

SOAP header


SOAP body

returnparameter

HTTP Post



9/18

service requestor

clientimplementation

HTTP engine

client stub

SOAP engine

invokes the service

as a local call

invoke SOAP engine toprepare SOAP message

packages SOAP into HTTP andpasses it to an HTTP client thatsends it to the provider

service provider

serviceimplementation

HTTP server

server stub

SOAP router

invokes the local procedure of

the service implementation

the router parses the message,identifies the appropriate stub,and delivers the parsed message

passes the content of the HTTPmessage to the router



10/18

WSDL specification

abstract part

types

messages

operations

port types

concrete part

bindings

services andports



11/18

port andservice

binding

operation andport type

messages

abstract

part

concretepart


12/18




stub skeleton

WSDL ofservice provider

WSDL compiler(server side)

WSDL compiler(client side)

SOAP-based

middleware

SOAP-based

middlewareSOAP messages

WSDLgenerator

1

2



13/18

businessEntitynamecontacts

descriptionidentifierscategories

businessServiceservice key

namedescriptioncategories

bindingTemplatebinding keydescriptionaddressdetailed inforeferences to tModels

tModelkeyname

descriptionoverviewDocidentifierscategories

tModelkeyname


Specs storedat theproviders

site

Stored in the UDDI registry

tModelkeyname


tModelkeynamedescriptionoverviewDocidentifierscategories

tModelkeyname



14/18

uddi-org:publication_v3

UDDI Publication API V3.0

http://uddi.org/wsdl/uddi_api_v3_binding.wsdl#UDDI_Publication_SoapBinding

http://uddi.org/pubs/uddi_v3.htm#PubV3

overviewDoc(refer to WSDLspecs and to APIspecs)

classificationinformation(specifies that thistModel is aboutXML, WSDL, andSOAP specs)



15/18

service requestor


Web service interface

SOAP/HTTP

Inquiry APIPublishers API

service provider

SOAP/HTTPS

UDDI registry A



Inquiry API Publishers API

UDDI registry B

Subscription,Replication, and

Custodytransfer APIs(SOAP/HTTPS)



16/18



Inquiry APIPublishers API

UDDI registry

service requestor service provider

WSDL service

descriptions

SOAP/HTTP SOAP/HTTPS

tModel

businessEntity

businessServicebindingTemplate



17/18



18/18

service providerservice

implementation

HTTP engine

server stub

SOAP router

WSDLgenerator

1

Inquiry API

UDDIregistry

WSDL servicedescriptions

WSDL compiler2

UDDI publisher

3

Publishers API

tModel

businessEntity

businessService

bindingTemplate

Documents

WSBook Fig Ch6