CamelOne 2012 - BPM beyond Web Services

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BPM beyond Web Services

Kai Wähner

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www.mwea.de

Kai Wähner

16.05.2012 Seite 2 Kai Wähner

Main Tasks Evaluation of Technologies and Products

Requirements Engineering Enterprise Architecture Management

Business Process Management Architecture and Development of Applications

Planning and Introduction of SOA Integration of Legacy Applications

Cloud Computing

Contact Email: kai.waehner@mwea.de Blog: www.kai-waehner.de/blog

Twitter: @KaiWaehner Social Networks: Xing, LinkedIn

Consulting Developing Speaking Coaching Writing

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What is the Key Message?

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BPM should be used for optimizing business processes!

Key Messages

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www.mwea.de

BPM should be used for optimizing business processes!

BPM should NOT be used for systems integration!

Key Messages

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www.mwea.de

BPM should be used for optimizing business processes!

BPM should NOT be used for systems integration!

Activiti and Apache Camel are a perfect combination!

Key Messages

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www.mwea.de

1)  Business Process Management (BPM)

2)  Activiti

3)  Apache Camel

4)  Combination of Activiti and Apache Camel

Agenda

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www.mwea.de

1)   Business Process Management (BPM)

2)  Activiti

3)  Apache Camel

4)  Combination of Activiti and Apache Camel

Agenda

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www.mwea.de

BPM attempts to improve processes continuously. It can therefore be described as a "process optimization process.“

Wikipedia

What is Business Process Management (BPM)?

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www.mwea.de

increase efficiency better quality reduce costs

enable new business models

Why BPM?

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Business-IT-Alignment

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How to do BPM?

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Standards

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BPM

BPEL BPMN

XPDL WF-XML

BPEL4People

jPDL

ARIS EPC

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Standards

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BPM

BPEL BPMN

XPDL WF-XML

BPEL4People

jPDL

ARIS EPC

www.mwea.de

BPMN

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Business Process Model and Notation (BPMN) is a graphical representation for specifying business processes in a business process model.

Wikipedia

www.mwea.de

• BPMN is a standard notation for designing business processes (versus: UML is a standard modeling language best suited for designing and implementing software)

• not just flow charts! sufficient restrictions / constraints => executable!

• standardized XML format

• orchestration and choreography

• extension points => add specific needs without breaking interoperability

• optional mapping of a BPMN subset to BPEL (restricted to block-structured flows without cycles)

BPMN 2.0

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BPMN 2.0

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BPMN 2.0

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20-80 rule

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•  long-running stateful workflows •  frequently changing processes •  human interaction

When to use BPM?

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http://www.activevos.com/blog/soa/the-four-myths-of-bpm-projects-what-it-project-teams-need-to-know/2011/01/18/

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1) Business analysts will create executable process models

2) Business analysts can create executable process models

3) Business analysts want to create executable process models

4) IT wants business analysts to create executable process models

The Four Myths of BPM Projects

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1)  Business Process Management (BPM)

2)   Activiti

3)  Apache Camel

4)  Combination of Activiti and Apache Camel

Agenda

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www.mwea.de

Alternatives for BPM

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Complexity of Orchestration

Low High

BPM Framework

BPM Suite

No Tool

www.mwea.de

Alternatives for BPM

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Complexity of Orchestration

Low High

BPM Framework

BPM Suite

No Tool

Activiti vs. JBoss jBPM vs. Bonita vs. ProcessMaker

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•  open source (Apache License) •  BPMN 2.0 process engine •  lightweight •  easy to use •  Java API •  developer-focused •  embeddable

What is Activiti?

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www.mwea.de

Tool Stack

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Process Engine

Activiti Modeler Activiti Designer

Activiti Explorer camunda fox style

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How does Activiti work?

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•  BPMN 2.0 process engine •  state machine with one active state •  execution progresses via transitions •  most BPMN 2.0 elements are implemented as a state •  states are connected with leaving and arriving transitions (called sequence flows) •  every state (i.e. its corresponding BPMN 2.0 element) can have a piece of logic attached

(executed when the process instance enters the state)

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Services RuntimeService TaskService FormService HistoryService IdentityService ManagementService RepositoryService

Actviti Engine API

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Service Tasks (BPMN Standard) Web Service Task Script Task (e.g. Groovy or JavaScript) User Task Business Rule Task

Service Tasks (Activiti Extensions) Java Tasks Spring Service Task ... more

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<process id="bookorder" name="Order book"> <startEvent id="startevent1" name="Start"/> <sequenceFlow id="sequenceflow1" name="Validate order"

sourceRef="startevent1" targetRef="scripttask1"/> <scriptTask id="scripttask1" name="Validate order“ scriptFormat="groovy"> <script>out:println "validating order for isbn " + isbn;</script> </scriptTask>

<sequenceFlow id="sequenceflow2" name="Ending process" sourceRef="usertask1" targetRef="endevent1"/> <endEvent id="endevent1" name="End"/> </process>

Code Example (BPMN Process)

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ProcessEngine processEngine = ProcessEngineConfiguration .createStandaloneInMemProcessEngineConfiguration() .buildProcessEngine();

RuntimeService runtimeService = processEngine.getRuntimeService(); RepositoryService repositoryService = processEngine.getRepositoryService(); repositoryService.createDeployment()

.addClasspathResource("bookorder.simple.bpmn20.xml") .deploy(); ProcessInstance processInstance = runtimeService.startProcessInstanceByKey( "simplebookorder");

assertNotNull(processInstance.getId()); System.out.println("id " + processInstance.getId() + " " + processInstance.getProcessDefinitionId());

Code Example (Activiti Java API)

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Use Case

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Start Event

Script Task

Service Task

User Task

End Event

Automatic Automatic Manual

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Activiti in Action

Live Demo

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1)  Business Process Management (BPM)

2)  Activiti

3)   Apache Camel

4)  Combination of Activiti and Apache Camel

Agenda

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www.mwea.de

Apache Camel

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www.mwea.de

Apache Camel

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Come on, guys! We are at

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Alternatives for Systems Integration

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Complexity of Integration

Low High

Integration-Framework

Enterprise Service Bus (ESB)

No Tool

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Alternatives for Systems Integration

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Complexity of Integration

Low High

Integration-Framework

Enterprise Service Bus (ESB)

No Tool

Apache Camel vs. Spring Integration vs. Mule ESB http://www.kai-waehner.de/blog/2012/01/10/spoilt-for-choice-which-integration-framework-to-use-spring-integration-mule-esb-or-apache-camel

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Why Apache Camel?

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•  Standardized Modeling •  Efficient Realization •  Developer-focused •  Automatic Testing •  Many Components •  Several DSLs •  Awesome Community

www.mwea.de

1)  Business Process Management (BPM)

2)  Activiti

3)  Apache Camel

4)   Combination of Activiti and Apache Camel

Agenda

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www.mwea.de

Apache Camel + Activiti

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BPMN Integration

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Script Task Service Task

Groovy JavaScript

etc.

Java SOAP Web Service

Everything (from Cobol to Ruby)

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Reinventing the Wheel ...

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Spaghetti Solutions

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Separation of Concerns

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Both can realize processes. Both can integrate services.

Overlappings?

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Both can realize processes. Both can integrate services.

Overlappings?

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•  Support for long running stateful processes •  Human workflow integration

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Both can realize processes. Both can integrate services.

Overlappings?

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•  Support for long running stateful processes •  Human workflow integration

•  Connectivity / Adaptors to connect to external systems using a variety of different protocols  •  Predefined EIP for message routing

http://www.pleus.net/blog/?p=1028

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Both ...

•  ... are lightweight •  ... are open source •  ... are developer-focused •  ... offer combination out-of-the-box

Activiti + Apache Camel

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<serviceTask id="myServiceTask"

activiti:delegateExpression="${camelBehaviour}" />

<sequenceFlow sourceRef="myServiceTask" targetRef="myUserTask" />

Connecting BPMN, Activiti and Camel

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<bean id="camelBehaviour" class="org.activiti.camel.CamelBehaviour"> <constructor-arg index="0"> <list> <bean class="org.activiti.camel.SimpleContextProvider"> <constructor-arg index="0" value="activitiCamelProcess" /> <constructor-arg index="1" ref="camelContext" /> </bean> </list> </constructor-arg> </bean>

BPMN - Java Service Task

Spring Bean

BPMN Process Instance

CamelContext

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// Producer => Call Activiti process from Camel from("direct:start")

.to("activiti:myProcess");

// Consumer => Get called from Activiti process from("activiti:myProcess:myServiceTask") .log(LoggingLevel.INFO, "Received message on service task ${property.var1}") .setProperty("var2").constant("world")

.setBody().properties();

Camel Route using Activiti Component

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Activiti and Apache Camel combined ...

Live Demo

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Did you get the Key Message?

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www.mwea.de

BPM should be used for optimizing business processes!

BPM should NOT be used for systems integration!

Activiti and Apache Camel are a perfect combination!

Key Messages

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www.mwea.de

Did you get the Key Message?

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Whet your appetite?

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Become a Part of the Open Source Community

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= BPM beyond Web Services

Thank you for your Attention. Any Questions?

Kai Wähner

Kai Wähner

MaibornWolff et al: www.mwea.de

Email: kai.waehner@mwea.de Twitter: @KaiWaehner Blog: www.kai-waehner.de/blog

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