a process service model for dynamic enterprise process interconnection k. baïna, k. benali, and c....

A process service model for A process service model for dynamic enterprise process dynamic enterprise process

interconnectioninterconnection

K. BaïnaK. Baïna, K. Benali, , K. Benali, and C. Godartand C. Godart

ECOO Team – LORIA

Nancy Universities, INRIA, CNRS

FRANCE

CoopIS'2001 (Trento)K. Baïna, K. Benali, and C. Godart

2

Outlines

Introduction

Process Interconnection State of the art

A Generic Process Service Interconnection Model

Model implementation in our CSCW plate-form DISCOBOLE

Conclusion and Perspectives

A process service model for A process service model for dynamic enterprise process interconnectiondynamic enterprise process interconnection


3

Introduction

Enterprises Need– capitalising existing partnerships :

intensify and strength exchanges with strategic partners over the world

– optimising exchanges (faster/cheaper) by interconnecting applications :

Knowledge Databases, Data Warehouses, ERPs, SCMs, Workflows,…

I. IntroductionII. State of the artIII. Model A. Visibility B. DynamicsIV. ImplementationV. Perspectives



4

Introduction



R E-learning Enterprise

s2

s3

s4

s1

s32

...

P3

Content Collector

...

s11 P1

Web Agency

...

s22

...

P2

Site Hoster

E-learning Partnership Enterprises – Partnership Actors :

R : E-learning enterprise, P1 : Web agency, P2 : Site hoster, P3 : E-learning Content Collector.

– Partnership Purpose : to product e-learning courses.

– Partnership Rule : each actor offer services related to its own business core.


5

Introduction



R E-learning Enterprise

s2

s3

s4

s1

s32

...

P3

Content Collector

...

P ortal development

P ortal hosting

E-learning P ortal mission statement

establishment

C ontent C ollection

E-learning Content M arketing

E-learning Content Sale

e-learning enterprise production process

Content Adaptation

P ortal Content Integration

AND SPLIT

content extraction

content packaging

e-learning contentcollection process

content formatting

requirements specification

juridical contract

establishment

site prototyping

site transition

s11 P1

Web Agency

...

site developmentprocess

s22

...

P2

Site Hoster

name server hosting

page hosting

site hosting process

mail server hosting


6

State of the art

Workflow Management Systems : – based on heterogeneous BPDLs (Business Process Definition

Language)

– centred on intern enterprise needs

– no process semantics support process instances handled as simple graph objects (node =

activity and directed edge = control flow).

– monolithic process instances depend on the workflow engine (encapsulated

black boxes).




7

State of the art

Workflow Interconnection Models and Solutions

– Models Data exchange protocols,

Message based communication,

Synchronisation mechanisms….

– Web Services SOAP, Biztalk, e-speak,…

– Normalisations SWAP/WebDav (dead RFC drafts),

WfMC I4 (interoperability paradigms, Wf-XML/(HTTP, MIME) I2 mapping),

OMG (CORBA services, ADSS),




8

A generic process service interconnection Model

Service centred Approach– A process service “design pattern” is as a process proxy handling:

functional process access points (Methods, Events, Data),

and rights on them (Visibility Contract),

with a layer of process semantics (Profile, Distance, Matching and Neighbourhood operators).

A two facets based Model

– Visibility : interconnection Privacy / Security / Marketing

– Dynamics : interconnection parameters run time decision




9

Visibility

Semantic Visibility

– handling elements to classify and explore services

Functional Visibility

– handling Resources of the service




10

Semantic Visibility

Process Service Category,

Process Service Profile with

– Process Service Distance measurements,

– Process Service Matching Predicate,

– Process Service Neighbourhood Computing.




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Semantic Visibility

Process Service Category : an object classification,

Process Service Profile : a set of significant typed attributes

Process Service Distance measurements : a norm operator,

Process Service Matching Predicate : an equivalence class operator,

Process Service Neighbourhood Computing : a thin equivalence class operator.




12

A Category and Profile based Scalar Distance (global measure to the whole service profile)

Semantic Visibility


…

…

Process service reference (distributed objects module)

Other Process services

Scalar Distance between services

d1

S1dj

dj

nk

i

nijirefijrefnj SprofileSprofilew), S(Sdistd

1

)()(


ai

a1

a2 (ai) Process service profile axes

JSP & Servlets module

JDBC module

CORBA module

Sockets module

XML & Servlets module

Sj

ak

Java RMI module

RPC module


13

A Category and Profile based Multidimensional Distance (detailing measures by profile axes)

Semantic Visibility


…

Other Process services

Multidimensional Distancebetween services

D1

S1

SjDj

Dj

ijirefiijkiijjrefj SprofileSprofilewdd), Saxis(SdistD )()()(_ ,..1


ai

a1

ak



JDBC module

CORBA module

Sockets module


Java RMI module


RPC module


14

A Category and Distance based Matching predicate

Semantic Visibility


…

…

Matching Process services

Unmatching Process services


ai

a1

ak


)),().___.

..((),,(

provreq

provreq

provreq

provreq

SSdistcategorySoftypesubiscategoryS

categoryScategoryStrueSSSSmatch


JDBC module

CORBA module

Sockets module


Java RMI module


distributed objects module

RPC module


15

A Matching and Distance based Neighbourhood computing

Semantic Visibility


ai

a1

ak

…

…

Neighbour Process services

Outsider Process services



),',('),(

max),(min),()(

ssmatchSsSsNHwithsNHsNHSsNH


JDBC module

CORBA module

Sockets module


Java RMI module


RPC module



16


Process Service API

– Process Service Events,

– Process Service Methods,

Process Service API visibility contract

Process Service Data spaces (in progress).




17



Process Service32

Process Service API

WFMS Process API

e-learning content

collectionWorkflowProcess32

hidden interface

shown interface

e-learning content

collectionProcess

Instance32

Process Instance API

- name- profile

- visibility contract

- provider- requester

- category

content extraction

content packaging

content formatting

content extraction

content packaging

content formatting

Process Service API (Methods, Events and API visibility contract)



18

Dynamics

Co-Decision Problems :

– previously unknown interconnection parameters partners to be interconnected,

concrete process services to be exchanged,

communication protocol to be adopted,

interconnection exchange rendezvous, etc.




19

Dynamics

Negotiation Mechanisms :

– application of “our generic negotiation model for CSCW”, M. Munier, K. Baïna and K. Benali, CoopIS’00

Language : A speech act based Negotiation Language,

Protocol : A transactional rule guided Protocol,

Tactical : A methodology based on preference order relations between decision items.




20

Dynamics

Negotiation of Service Profile

– Language : speech acts + profile attributes

– Tactical : having less than a maximum distance


Tactical Evolution of the Process service profile during negotiation


Conceding tactical

ai

a1

ak

…

…

a2 (ai) Process service profile axesRPC module




21

Dynamics

Negotiation of Service API visibility contract

– Language : speech acts + API (methods, events)

– Tactical : progressing inside a contract set



Conceding tacticalProvider view

v5=WB

M

EVM

1

EV 1

EV | Events|

Mj

EV k

......

M|R

-me

tho

ds

|v4

v2v1

...

......

EV 1

EV | Events|

EV k

...

...

M

M1 Mj ......

M|R

-me

tho

ds

|

v3

EV

v0=BBBB

WB

...


22

A generic process service interconnection Model – sum up

Step 1 : creating and profiling process service,

Step 2 : publishing process service (request/provide),

Step 3 : process service neighbourhood computing,

Step 4 : process service profile negotiation,

Step 5 : process service API visibility contract negotiation,

Step 6 : process service wrapping (contract signature),

Step 7 : process service enactment,

Step 8 : process service life cycle monitoring.




23

Model implementation in our CSCW plate-form DISCOBOLE

DISCOBOLE as DIStributed COoperation and Business prOcess on LinE

– CORBA based Negotiation Support System : Generic NSS applied to Process Service Profile Negotiation, and

to API visibility Negotiation

– CORBA based Process Service Support System : Private/Requested/Provided Process Service Spaces, Process

Service Categorisation and Profiling, Matching Predicate, Neighbourhood Computing, Profile Negotiation, API visibility contract Negotiation, Wrapping, Enacting, etc.




24

Conclusion and Perspectives

A generic process service interconnection model supporting dynamics and visibility

In progress work

– Process Service data spaces,

– Process Service composing,

– Process Service interconnection strategies.




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a process service model for dynamic enterprise process interconnection k. baïna, k. benali, and c....

Documents

process proxy handling

elearning enterprise

intern enterprise

interconnection parameters

visibility contract

elearning content collector

product elearning courses

partnership purpose