BPM in a SOA Environment - Total Architecturetotal-architecture.com/indexFiles/Presentations/BPM in a SOA... · Principal Software Architect at TIBCO Software Inc. Author ... Design

BPM in a SOA EnvironmentBPM in a SOA EnvironmentPaul C. BrownPaul C. Brown

Principal Software ArchitectPrincipal Software Architect

TIBCO Software Inc.TIBCO Software Inc.

1Copyright © 2009 TIBCO Software Inc. All rights reserved

GoalGoal

Understand theUnderstand the

architectural relationshipsbetween

BPM and SOA

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a d SOand their

tt f i t ti

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Copyright © 2009 TIBCO Software Inc. All rights reserved

My BackgroundMy BackgroundPrincipal Software Architect at TIBCO Software Inc.Author of two books:Author of two books:

Succeeding with SOA: Realizing Business Value Through Total ArchitectureImplementing SOA: Total Architecture in Practice

Co‐Author of the SOA ManifestoF t S k E t i A hit t d SOA

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Frequent Speaker on Enterprise Architecture and SOA45 years of programming40 years working with industrial distribtued systems

www.devoxx.com 40 years working with industrial distribtued systems

BS EE, Ph.D. CS

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AgendaAgenda

Enterprise Architecture with BPM and SOAEnterprise Architecture with BPM and SOA

Terminology

S iBPM Service Consumer Patterns

BPM Service Provider Patterns

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AgendaAgenda


Terminology



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Separation of Processes and ServicesSeparation of Processes and ServicesSOA and BPM refine the traditional structure

Introduce a separation between processes and servicesp pThe business process is a first‐class architectural concept

Their structure needs to be aligned with both organizations and systemsProcesses interact with one another just like systems do!

Processes are assembled from servicesSome performed by people, others by systemsId ll h i t d i lti l b iIdeally, each service gets used in multiple business processes


Separation of Mediation from ServicesSeparation of Mediation from ServicesService access control based on:

SecuritySecurityQuality‐of‐service agreements

Routing of service requestsLoad distribution across multiple service providersLogging of service utilizationPerformance and SLA measurementsPerformance and SLA measurements


Unmanaged and Managed ProcessesUnmanaged Processes

Components/services are “hard wired” together to form the actual processpOne component’s results become the inputs to the next componentProactive monitoring and breakdown recovery is required for high availability

/Managed/Orchestrated ProcessesOne component coordinates the work of other components and servicesManager can monitor process statusManager can monitor process statusThe process of starting the manager is always an unmanaged process!


Separating Processes and InterfacesSometimes you want to make the same process available via different channels

Avoid duplicating the business rulesAvoid duplicating the business rulesSome of the channels may not be conventional presentations

May provide web‐service accessMay provide web‐service accessIn such cases, you want to make the process itself into a service

Accessible from a variety of presentation componentsAccessible from a variety of presentation components


Discipline is RequiredDiscipline is RequiredSOA and BPM provide many opportunities to organize and manage the enterprise

The challenges are organizational as well as g gtechnical


For Success, Think Total Architecture!

• Business Purpose• Business Processes

– Sales order management– Inventory management– AccountingP l• People– Participants in the business

processes• Information

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Information– What information is being

used • Systems

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– Computers, networks, applications, infrastructure

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• Copyright © 2009 TIBCO Software Inc. All rights reserved

SOA Roles Played By BPMSOA Roles Played By BPMBPM as a Service Consumer

Services whose operations provide access to enterpriseServices whose operations provide access to enterprise applications

Create, update, cancel orderG dGet order status

BPM as a Service ProviderServices whose operations define and manage business

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Services whose operations define and manage business processes

Start processSt t l t ti it

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Get activity status

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Terminology



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TerminologyTerminology

OrchestrationOrchestration

Choreography

ll b iCollaboration

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OrchestrationOrchestrationA process with central coordination

f h lScope of orchestration is a pool

Coordinated participants are swimlanes


ChoreographyChoreographyA process without central coordination Independent participants are pools (may have swimlanes)Activity within pool is shown


CollaborationCollaboration

Choreography without the details of activities within a poolFocus is on patterns of interactions

BPMN does not provide a mechanism to specifyBPMN does not provide a mechanism to specify interaction patterns (allowed/disallowed sequences)


Practical CollaborationPractical Collaboration

Show your part of the process (your pool)Show your part of the process (your pool)


AgendaAgenda


Terminology



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Black Box Synchronous Service CallBlack Box Synchronous Service Callm

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White Box Synchronous CallWhite Box Synchronous Call


White Box Sync Call With ErrorsWhite Box Sync Call With Errors


White Box Sync Call With LegacyWhite Box Sync Call With Legacy


White Box Sync Call With Legacy & ErrorsWhite Box Sync Call With Legacy & Errors


Black Box Async Service CallBlack Box Async Service Call


White Box Async Service CallWhite Box Async Service Call


White Box Async Service Call with ErrorsWhite Box Async Service Call with Errors


Asynchronous IssuesAsynchronous Issues

Mechanism for delivering asynchronousMechanism for delivering asynchronous response

Periodic polling of service statusPeriodic polling of service status

Batch update of service status

Callback invoked by service when done

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Subscription to service status updates (WS‐Eventing)

Restoring appropriate state after component

www.devoxx.com Restoring appropriate state after component

failure

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White Box Async With LegacyWhite Box Async With Legacy


DelegationDelegation


Delegation with Async ResponseDelegation with Async Response


Delegation with Async Response and ErrorsDelegation with Async Response and Errors


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Process Definition ServicesProcess Definition Services

Example OperationsExample OperationsCreate process

Add activity edit activityAdd activity, edit activity

Add sequence flow

U O ti

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Usage OptionsDesign Time

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Run Time

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Process Execution ServicesProcess Execution Services

Example OperationsExample OperationsStart case (process instance)

Get eligible tasks for a userGet eligible tasks for a user

Start task, finish task

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Case Start – Fire and ForgetCase Start Fire and Forget m

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Case Start ‐ DelegationCase Start Delegation


Automatic Work AssignmentAutomatic Work Assignment


Manual Work AssignmentManual Work Assignment


Work Assignment IssuesWork Assignment IssuesSorting and selection criteria for tasks

Case properties worker propertiesCase properties, worker properties

Computational load

Biases arising from worker selection of tasksBiases arising from worker selection of tasks

Avoidance of difficult work

Keeping interfaces and process management in synch

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Component restart

Communications interruption

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Going back to work in progress

Coordinating data access

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Switching TasksSwitching Tasks


Data Access: BPMManagedData Access: BPM Managed


Resulting Data Structure Maintenance ComplexityResulting Data Structure Maintenance Complexity


Data Access: Interface ManagedData Access: Interface Managed


Required Transactional CoordinationRequired Transactional Coordination


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Terminology



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SummarySummaryThink through intended utilization patterns before building any serviceg yDesign for Failure!

Failure scenarios are difficult/expensive to retrofitChallenge the business to define the scenarios

Think Total ArchitectureBusiness processes people information and systems

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Business processes, people, information, and systems must be architected concurrentlyWhat belongs in the service? In BPM? In the interface?

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Pay attention to user interaction stylesChanges in style can impact many components (layers)

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For More Information on Total Architecture…

Succeeding with SOA• The business and organizational perspective

For More Information on Total Architecture…

g p p• For CxOs, managers, architects

Implementing SOAp g• Creating the total architecture

• For enterprise and project architects, CTOs

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The Total Architecture website: www.total‐architecture.com

BPM and SOA product information:

www.devoxx.com BPM and SOA product information:

www.tibco.com

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BPM in a SOA Environment - Total Architecturetotal-architecture.com/indexFiles/Presentations/BPM in a SOA... · Principal Software Architect at TIBCO Software Inc. Author ... Design