A Tool for the Design and Verification of Composite

Web Services

María Emilia Cambronero, Gregorio Díaz, Valentín Valero and

Enrique Martínez

Universidad de Castilla-La Mancha. SPAIN

FLACOS 2008

1.Introduction

2.Web Services Translation tool (WST)

3.Case Study

4.Conclusion and Future Work

Little effort has been dedicated to systematically design and analyze web services systems.

Introduction

Travel Agent Internet

Credit Card

Car Rental

Hotels

Airlines

The use of formal techniques bring rigour and consistency to system specification and implementation.

The airline always keeps the reservation 24 hours before the payment.

The TravelAgent always cancels the reservation on the traveler’s demand.

Introduction

Travel Agent Internet

Credit Card

Car Rental

Hotels

Airlines

Web Services Coordination and timed restrictions analysismust be enforced in Web Services.

Web Services: SET OF PROTOCOLS & STANDARS

Choreography Description LanguageWS-CDL

Business Process LanguageWS-BPEL

UDDI

WSDL

SOAP

XML,Encodings

HTTP,SMTP, JMS

Introduction

WS-CDL

Introduction

Travel Agent Internet

Credit Card

Car Rental

Hotels

Airlines

WS-BPEL

WS-BPEL

WS-BPEL

WS-BPEL

WS-BPEL

1.Introduction

2.Web Services Translation tool (WST)

3.Case Study

4.Conclusion and Future Work

WST tool

Time RestrictionsModel Checking Engine

Choreography Layer

WS-CDLXML

Orchestration Layer

WS-BPEL XML

TIMEDAUTOMATA

Sequence Diagrams

RT-UMLXMI

XSLT

(Done)

Under development

(Done)

XSLT XSLT

(Done)

XSLT

WST tool

WST tool

WS-CDL documents generation

Execution of translation

process

WST tool

TA documents generation

Execute the translation

process

UPPAAL Tool

- Open XMI file- Open WS-CDL file- Save XMI file- Save WS-CDL- Exit

- Save Timed Automata

- Save WS-CDL

1.Introduction

2.Web Services Translation tool (WST)

3.Case Study

4.Conclusion and Future Work

Case Study: Internet Purchase Site

Case Study:

Case Study: Internet Purchase Site

Case Study: Internet Purchase Site

XSLT (XML Stylesheets Language) for Transforming XML documents into other XML Documents.

Case Study: Internet Purchase Site

Case Study: Internet Purchase Site

Case Study: Internet Purchase Site

1.Introduction

2.Web Services Translation tool (WST)

3.Case Study

4.Conclusion and Future Work

WST as a tool to support Web Services designs with time restrictions.

The starting point are UML 2.0 sequence diagrams.

After modelling the sequence diagrams, they can be translated into Web Services descriptions.

Finally, the descriptions will be translated into a formal specification supported by a model checking engine. This engine allows developers to validate the design of the Web Services.

Conclusions

Orchestration Layer

WS-BPEL XML

TA

Sequence Diagrams

RT-UMLXMI

(To develop)

XSLT

Future Work

XSLT

XSLT

A Tool for the Design and Verification of Composite

Web Services

María Emilia Cambronero, Gregorio Díaz, Valentín Valero and

Enrique Martínez

Universidad de Castilla-La Mancha. SPAIN

FLACOS 2008