SOA - 10 Service Orchestration - fbi · PDF file10. Service$Orchestration$ 11. Evolution(of ... Traditional&BPM& Suites require a vendor specific learning curve. ... SOA - 10 Service

SOAService Oriented Architecture

10. Service OrchestrationDarmstadt University of Applied Sciences, Department of Computer Science

Dr. Markus Voß (Accso GmbH)

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Today’s topic

1. Introduction 2. Business Architecture 3. Designing Domains 4. Designing Components 5. Designing Interfaces and Operations 6. Loose Coupling7. Excursus: Business Information Systems8. Integration9. Web Services10. Service Orchestration 11. Evolution of Application Landscapes

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Agenda

§ Overview

§ BPM

§ BPEL 2.0

§ BPMN 2.0

§ Literature

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Service orchestration in the context of the enterprise architecture framework

Physisch(womit?)

Geschäftsstrategie IT StrategyKontextuell(warum?)

Konzeptionell(was?)

Logisch(wie?)

GeschäftInformation System (IS) Technical Infrastructure (TI)

IT

AS IS

TO BE

IDEAL

Geschäftsarchitektur

(Geschäftsservices,Geschäftsprozesse,Geschäftsobjekte,Organisation, etc.)

Domänenund

(Anwendungs-)Services

LogischeAL-Komponenten

und ihre Schnittstellen

PhysischeAL-Komponenten


Technische Services

LogischeAnwendungs- undIntegrations-plattformen

PhysischeAnwendungs- undIntegrations-plattformen

Domänenund






Technische Services



Domänenund






Technische Services



Contextual(why?)

Conceptual(what?)

Logical(how?)

Physical(with what?)

Business

Business Architecture

(Business Services,Business Processes,Business Objects,Organisation)

Business Strategy

PhysicalAL-Componentsand their Interfaces

Physical Application and Integration Platforms

LogicalAL-Componentsand their Interfaces

Logical Application and Integration Platforms

Domainsand

Application Services

TechnicalServices

Technical

Reference Architecture

Evolution

Business Architecture

Ideal ApplicationLandscape

Integration

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Service orchestration pattern / “two level programming”:Separating agile from stable parts

Quelle: M.B. Juric, M. Krizevnic: WS-BPEL 2.0 for SOA Composite Applications with Oracle SOA Suite 11g

1st Level• Function and Data• More stable/basic• ProgrammersDomain

2nd Level• Business Process• More agile• Modellers Domain{{

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Service Orchestration in the context of the reference architecture

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xxx xxxxxxx x xxx xx xx xxxxxxxxxxxx xx xxxxxxxx xx xx cxxx xcxxxxx xxxxxx

<<AL>>xxx xxxxxxx x xxx xx xx xxxxxxxxxxxx xx xxxxxxxx xx xx cxxx xcxxxxx xxxxxx

<<AL>> <<AL>>

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Web servicestechnologies (WSDL, SOAP, UDDI) forcommunicationbetween looselycoupled components

Service orchestrationtechnology (BPEL 2.0or BPMN 2.0) forimplementing Business Process components

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Agenda

§ Overview

§ BPM

§ BPEL 2.0

§ BPMN 2.0

§ Literature

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Reference for chapter slides

Gunnar von der BeckBPM ExpertAccso

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BPM – Business Process Management

• A process is a series of specified operations (activities, tasks) executed by humans or machines to achieve one or more objectives. The ultimate aim is to create customer value and thus to generate value for the company.

“BPM Common Body of Knowledge” (EABPM*):

• Business Process Management (BPM) is a systemic approach geared to capture, design, execute, document, measure, monitor and control automated as well as non-automated processes in order to meet the objectives that are aligned with the business strategy of a company. BPM embraces the conscious, comprehensive and increasingly technology-enabled definition, improvement, innovation and maintenance of end-to-end processes. Through this systemic and conscious management of processes companies achieve better results in a faster and more flexible way.

* European Association of Business Process Management

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BPM – Process Models & Layers

Layer 1Strategic

Process Model

Layer 2

Operational Process Model

Layer 3a

Technical Process Model

Layer 3b

IT Specification

Layer 4b

Implementationprocess engine usage

without process engine

Business

IT

Content: process overviewPurpose: rapid understanding

Content: operational flowPurpose: work & implementation basis

Content: technical detailsPurpose: implementation

„Business-‐IT-‐Alignment“ J

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BPM – Process Automation using a Process Engine

Task Assignment

AutomatedService

Invocation

AutomaticDecision

AutomatedService

Invocation

Task Assignment

Turn Around Measurement (Processing Time)

Process-Engine

Process Participant IT-System Process ParticipantIT-System

TechnicalProcess Model

Service-‐Orchestration

Human Workflow

Management

Monitoring and Reporting

Modeling

...

...

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BPM – Process Engine = Magic BPM Suite + Zero Code?

BusinessUser

SoftwareDeveloper

“While there are reasonable use cases for zero code BPM Suites, they are not the right approach for automating business processes that execute an IT based business model.”

?

“The real problem is that most of the zero coding BPM vendors claim that you should use their solution for situations where you actuallyshouldn't.”

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BPM Suite – Learning Curve

CLUELESSYou don‘t knowwhat you don‘tknow.

NAIVELY CONFIDENTYou think you know,but you still don‘t knowwhat you don‘t know

DISCOURAGINGREALISTICYou know what youdon‘t know.

MASTERY ACHIEVEDYou know it.

Traditional BPM Suites require a vendor specific learning curve.

“If your business model is IT based, your software developers are probably your most valuable assets.”

There are numerous Java developers specialized in Java EE conceptsand integration frameworks.

Business-IT-Alignment is not about getting rid of IT, but a successful collaboration between partners. Allow business as well as IT to use their most productive tools - and bring them together!

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BPM – Notations Overview

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EPK (Ereignisgesteuerte Prozesskette) – a model for Business & IT?

• EPK appears simple, the symbols are more or less wellknown.

• But: EPK is neither correct nor complete. Samples:- when exactly does the timing of the 7 days start?- what is a sucessful and what an erroneous ending?- which activity is a service and which a human task?

è EPK is suitable for strategic process models.

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BPEL 2.0 – a model for Business & IT?

• BPEL = building new services by orchestrating existing services• Aligned to the usage of the WS-*-Stack• Restrictions due to block based design (versus graph based)!• Human Task Management not before introduction of BPEL4People

è BPEL is a technical modeling language aiming at Web Service orchestration!

Why BPEL is not the holy grail for BPM:http://www.infoq.com/articles/bpelbpm

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BPMN 2.0 – a model for Business & IT!

è BPMN 2.0 has a level of detail suitable for the operational and the technical model J.

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Agenda

§ Overview

§ BPM and

§ BPEL 2.0

§ BPMN 2.0

§ Literature

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OASIS: WS-‐BPEL 2.0 (Web Services Business Process Execution Language) –

Technical Introduction� Part 1: Frank Ryan, Active Endpoints, Inc.� Part 2: Dieter König, IBM Senior Technical Staff Member� Part 3: Charlton Barreto, Adobe Senior Computer Scientist/Architect

� http://www.oasis-‐open.org/committees/tc_home.php?wg_abbrev=wsbpel

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24 Overview of Language Elements

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Agenda

§ Overview

§ BPM

§ BPEL 2.0

§ BPMN 2.0

§ Literature

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Gunnar von der BeckBPM ExpertAccso

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BPMN 2.0 – History and Scope

• BPMN developed by IBM as of 2001, graphical notation releasedby BPMI in 2004

• BPMN 1.0 is an official OMG standard since 2006• not executable up to and including BPMN 1.2

History

Scope

• developed to specify processes.• i.e. BPMN 2.0 does not include: process landscapes,

organisational structures, data, strategies, business rules, IT landscapes. There is no need to reinvent the wheel – eligiblenotations already exist.

• BPMN concentrates on processes, a process is simply a logicaland chronological order of activities – neither more nor less.

• final version released by OMG in January, 2011• with respect to the graphical notation BPMN 2.0 differs hardly

from BPMN 1.2. Only a few symbols have been added.• starting with BPMN 2.0 process models are executable (i.e.

technical artifacts are now well-‐defined and XML schemes havebeen provided).

BPMN 2.0

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BPMN 2.0 – Core Elements

• In a process certain things need to be done (Activities),• possibly only under certain conditions (Gateways),• and things can happen (Events).• Flow objects are connected using Sequence Flows, but only inside of a Pools or Lane.• Across pool boundaries you have to useMessage Flows.• Artifacts deliver more information details, they are connected to flow objects using

Associations.

complete notation:http://www.bpmb.de/images/BPMN2_0_Poster_EN.pdf

Activity

Event

Gateway

Sequence Flow

Message Flow

Association Note

Group

Data Object

Participants

Flow Objects Connection Objects Artifacts

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BPMN 2.0 – Business-‐IT-‐Alignment = Collaboration

ProcessEngine

Organisational flow of processparticipant

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BPMN 2.0 – Collaboration (Interacting Processes)

ProcessEngine

Organisational process of a participant

Message Flow

SequenceFlow

complete showcase:https://app.camunda.com/confluence/display/foxUserGuide/Twitter

Pool Blackbox

Pool Whitebox

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BPMN 2.0 – Multi-‐Level Escalation

Sub ProcessIntermediate Timer Event

Intermediate Message Event

Event BasedGateway

Boundary Event

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BPMN 2.0 – Error Handling

CatchingError Event

ThrowingError Event

TerminateEnd Event

Catches a named error

Catches all other errors

Event Sub Process

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BPMN 2.0 -‐ Compensation

BoundaryCompensation

Event

Association!

CompensationHandler

ThrowingCompensation

Event

„book hotel“ is multi-‐instance: compensation handler will be called forevery successful executed instance

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BPMN 2.0 and JEE 6 – camunda platform infrastructure

Source: camunda

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BPMN 2.0 and JEE 6 – WebService Integration Scenarios

+ e.g. Apache CXF

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+ e.g. Apache CXF

GenericImplementation(JaxWsDynamicClientFactory)

How-To:http://www.bpm-guide.de/2010/12/09/how-to-call-a-webservice-from-bpmn/

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+ e.g. Apache CXF

GenericImplementation (JaxWsDynamicClientFactory)

How-To:http://www.bpm-guide.de/2010/12/09/how-to-call-a-webservice-from-bpmn/

ESBe.g. Mule,

Apache Camel

Integration

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BPMN 2.0 and EAI/SOA -‐ Integration

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BPMN 2.0 and EAI/SOA – Message-‐ versus process-‐oriented

ClassicEAI Patterns

http://www.eaipatterns.com/toc.html

processorchestratesthe flow

EAI Patterns only forInbound/Outbound-‐

Interfaces

Process-‐oriented =

Separation ofConcerns

ESB:Message-‐oriented

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BPMN 2.0 and EAI / SOA: Typical Integration Scenario

ProcessEngine

ESB

ESB

complete showcase:https://app.camunda.com/confluence/display/foxUserGuide/Bank+Account+Opening

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Agenda

§ Overview

§ BPM

§ BPEL 2.0

§ BPMN 2.0

§ Literature

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Literature

http://docs.oasis-‐open.org/wsbpel/2.0/wsbpel-‐v2.0.pdf

BPMN 2.0 Notation Overviewhttp://www.bpmb.de/images/BPMN2_0_Poster_EN.pdf

„BPMN 2.0 by example“ http://www.omg.org/cgi-‐bin/doc?dtc/10-‐06-‐02.pdf

BPMN 2.0 Modeling Reference http://www.camunda.org/design/reference.html#!/reference

Praxishandbuch BPMN 2.0Carl Hanser Verlag GmbH & Co. KG, März 2012

Open Source BPM and Workflow based on BPMN 2.0http://www.camunda.org/

Documents

SOA - 10 Service Orchestration - fbi · PDF file10. Service$Orchestration$ 11. Evolution(of ... Traditional&BPM& Suites require a vendor specific learning curve. ... SOA - 10 Service