A framework for realizing artifact centric business processes in soa

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

Kan Ngamakeur, Sira Yongchareon, and Chengfei Liu
Faculty of Information and Communication Technologies
Swinburne University of Technology
Australia

Outline
 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

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 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
Data model Lifecycle model
Order Invoice Order
r1 r3 r4 r5
OrderID InvoiceID Add_order_item Creating_shipping billed Processing_order_item
CustomerName OrderID
OrderItem[] InvoiveDate

r6
GrandTotal BillingAddress
r2
r10 r9 r8 r7
Customer Total closed shipped In_shipping Ready_for_shipping Creating_shipping
Address AmontPaid

Shipment Shipment Invoice
r3 r7 r4 r5
ShipID Waiting_for_ship_item Ready_for_shipping unpaid paid
OrderID
CustomerName r9 r8
Shipping completed In_shipping
ShippingAddress
ShipStartDate
ShipEndDate


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 )

Artifact-centric Activity-centric

 fd
Mapped & run on


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

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?


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


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


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
Precondition
of rule e.g.
Artifact
r1 is
Business Rule Engine satisfied Controller

Rule Instance of R1

Process Controller

Artifact Instance of
Order

Service Instance of
createOrder


Evaluation
Criteria ACP realization on ACP realization on
activity-centric system artifact-centric system
Realization Needs to have a Direct and automatic
procedure conversion from ACP realization.
model to another
procedural execution
language (e.g., BPEL).
Flexibility and less flexibility More flexibility
Changes
management


Evaluation
Criteria ACP realization on ACP realization on
activity-centric system artifact-centric system
Verification and Needs to have separate Single model verification.
conformance (possibly automatic)
checking verification on both ACP
model and procedural
model.
Monitoring and Needs to have a Direct and consistent
Reporting retransformation from monitoring and reporting at
the implementation both model level and
specification back to its instance (of task and data)
model specification. level.


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


Thank you


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