A framework for realizing artifact centric business processes in soa

Kan Ngamakeur, Sira Yongchareon, and Chengfei Liu

Faculty of Information and Communication Technologies

Swinburne University of Technology

Australia

A Framework for Realizing Artifact-Centric Business Processes in Service-Oriented Architecture

Kan Ngamakeur : A Framework for Realizing Artifact-Centric Business Processes in Service-Oriented Architecture

The 17th International Conference on Database Systems for Advanced Applications 15-18 April, 2012, Busan, South Korea 2

Introduction Artifact centric process model Motivation

A framework for realizing Artifact-centric model Executable Artifact-centric model Architecture of ACP system Evaluation

Conclusion & future works

Outline



Introduction: Artifact-centric model Most traditional workflow models are based on activity -

centric perspective During the recent years, an artifact-centric approach to

business process modeling has been introduced as a promising paradigm(Nigam, A. IBM SYSTEMS JOURNAL 2003)

helps communicating the business intent for consolidating business operations across organizations

facilitates the process of business transformation provides higher level of flexibility of workflow enactment and

evolution



Introduction : Business artifacts Artifacts and their lifecycle - online ordering process example

The ordering process starts when a customer places an order to the retailer for a particular product and pays the invoice.

After completion of Payment, the retailer creates a shipment and delivers the order to the customer

Lifecycle modelData model

Shipment

Orderr1

Creating_shipping

shippedclosedr10

Add_order_itemr3

r2

billedr4

Processing_order_itemr5

Creating_shipping

r6

Ready_for_shippingr7

In_shippingr9 r8

Invoice

unpaid paidr3

Ready_for_shipping

Shipping completed

Waiting_for_ship_itemr7

In_shippingr8r9

r4 r5

OrderIDCustomerName

OrderItem[]GrandTotalCustomer Address

Order

InvoiceIDOrderID

InvoiveDateBillingAddress

TotalAmontPaid

Invoice

ShipIDOrderID

CustomerNameShippingAddress

ShipStartDateShipEndDate

Shipment



Introduction : Associations & Tasks Business rules – to associate artifacts and Services



Introduction: Artifact-centric model 4-Dimensional Framework for Artifact-Centric Business

Process Modeling (Hull, R., CoopIS 2008)

Business artifacts Macro Lifecycles Services (Tasks) Associations



Motivation Existing approach Model Transformation

approach for realizing the artifact-centric model so called ArtiFlow (Liu et al. ICSOC 2010 )

fd Mapped & run on

Artifact-centric Activity-centric



Motivation Advantage of An existing framework

Fast to implement the workflow model

Drawbacks of An existing framework Loss of information

Business rules are split and mapped to control flows Less flexibility

Tasks are locked up by control flows Monitoring and tracking can not be achieved directly

Need Sophisticated technique involving data gathering and processing

kngamakeur

add some example based on above figure

kngamakeur

add examlple of drawback



Our Approach Our approach for realizing artifact-centric process

model. Direct mapping between artifact-centric conceptual model

and executable model No model transformation(not artifact to activity-centric)

Advantages Flexibility No information loss Monitoring and tracking can be achieved directly



Issues Given artifact-centric process models

How to define an executable model based on an artifact-centric conceptual model ?

How to execute an artifact-centric executable model?

How to manage instances created during the model execution?

KanPhd

process instance



Realization framework

Our Proposed Framework for realizing Artifact-centric process model



ACP Executable Model: Artifact Schema

<xsd:complexType name="artifactType"> <xsd:sequence> <xsd:element name="attributes" type="attributesType" minOccurs = "1" maxOccurs = "1" /> <xsd:element name="states" type="statesType"

minOccurs = "1“ maxOccurs = "1" /> </xsd:sequence> <xsd:attribute name="name" type="xsd:string" use="required" /></xsd:complexType>



ACP Executable Model: Rule Schema

<xsd:complexType name="ruleType"> <xsd:sequence> <xsd:element name="onEvent" type="onEventType" maxOccurs = "1" minOccurs = "1" /> <xsd:element name="preCon" type="preconType" maxOccurs

= "1" minOccurs = "1" /> <xsd:element name="do" type="doType" maxOccurs = "1"

minOccurs = "1" /> </xsd:sequence> <xsd:attribute name="name" type="xsd:string" use="required"/></xsd:complexType>



ACP Executable Model: Service Schema<xsd:complexType name="serviceType"> <xsd:attribute name="name" type="xsd:string" use="required" /> <xsd:attribute name="inputMessage" type="xsd:string" use="required" /> <xsd:attribute name="outputMessage" type="xsd:string" use="required" /> <xsd:attribute name="operation" type="xsd:string" use="required" /> <xsd:attribute name="port" type="xsd:string" use="required"/> <xsd:attribute name="location" type="xsd:anyURI" use="required"/> <xsd:attribute name ="namespace" type ="xsd:anyURI" use="required" /></xsd:complexType>



ACP Executable Model Sample of An executable Model: Online Ordering

process

kngamakeur

should have some screen shot



Running Instances Class Diagram of ACP Running Instances



Running Instances



Running Instances: Log File Sample log file from an online order example

<log process_id="order_process-P1"> <record no="1"> <timestamp>Dec 4, 2011 2:47:49 PM</timestamp> <ruleId>r01-createOrder:R1</ruleId> <serviceId>system</serviceId> <pre_artifact> <order id="" state="start"> <orderId>null</orderId> <orderItem>null</orderItem> <quantity>null</quantity> <customerAddress>null</customerAddress> <customerName>null</customerName> <grand_total>null</grand_total> <amount_paid>null</amount_paid> <order_item_submit_date>null</order_item_submit_date> <order_item_complete_date>null</order_item_complete_date> </order> </pre_artifact> <post_artifact> <order id="order:c001" state="open_for_item"> <orderId>c001</orderId> <orderItem>msi notebook</orderItem> <quantity>2</quantity> <customerAddress>1/24 Belmont Ave Nth </customerAddress> <customerName>Kan Ngamakeur</customerName> <grand_total>null</grand_total> <amount_paid>null</amount_paid> <order_item_submit_date>null</order_item_submit_date> <order_item_complete_date>null</order_item_complete_date> </order> </post_artifact> </record>



Architecture of ACP system

kngamakeur

add some content to explain this



Architecture of ACP system: Components Process Deployer is used to deploy ACP Model definition file. Business Rule Engine provides a rule evaluating functionality. Process Controller is used to manage instances of a process

based on rule engine‘s command. Web Service Controller is used to invoke web services to

process artifact data. Artifact Controller is used to manage and update artifact Front-end UI Interface, is used to manage web-based

interactions between ACP system and users



Architecture of ACP system

Process Controller

Business Rule Engine

Precondition of rule e.g.

r1 is satisfied

Rule Instance of R1

Artifact Instance of Order

Service Instance of createOrder

Artifact Controller



Evaluation

Criteria ACP realization on activity-centric system

ACP realization on artifact-centric system

Realization procedure

Needs to have a conversion from ACP model to another procedural execution language (e.g., BPEL).

Direct and automatic realization.

Flexibility and Changes management

less flexibility More flexibility



Evaluation

Criteria ACP realization on activity-centric system

ACP realization on artifact-centric system

Verification and conformance checking

Needs to have separate (possibly automatic) verification on both ACP model and procedural model.

Single model verification.

Monitoring and Reporting

Needs to have a retransformation from the implementation specification back to its model specification.

Direct and consistent monitoring and reporting at both model level and instance (of task and data) level.

kngamakeur

use a table



Conclusion & Future works Realization Framework of Artifact-centric process

model

Direct Approach No loss of information, flexibility, direct monitoring

and tracking Future Works

Extends the framework to support interoperability Add Monitoring and tracking to our ACP system

kngamakeur

open issue?



Thank you

A framework for realizing artifact centric business processes in soa

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