jBPM 5.2

jBPM 5.2 - JBoss Business Process Management

Agenda


Overview of BPM.

BPMN 2.0 Notation

What is jBPM?

Installation of JBPM

Eclipse based editor

Guvnor (webased editor) and jBPM console

JBPM API - KnowledgeBase, knowldegesession, knowledgeBuilder, other terms.

Constructs used in jBPM - Script task, User task, Service Task, Rule Task, Startevent, End
Event, Gateways(converge and diverge), timer events

JBPM 5.2 Examples

Page 2 Xebia copyright

Overview of BPM


What is BPM?

BPM stands for Business Process Management

The term business process management typically refers to a set of activities enterprises
can employ to automate and optimize business processes in a manner adaptable to
dynamically changing environments

BPM in system engineering is the activity of representing processes of an enterprise, so
that the processes can be analyzed and improved.

BPM is typically performed by business analysts and managers who are seeking to improve
process efficiency and quality.


Overview of BPM continue...

– BPM is embodied in three distinct practices:

Process design: The task of designing existing and new processes

Process execution: The execution of an automated sequence of related events involving
software processes and/or human activities

Process monitoring: Observance and auditing of the state of individual processes so that
the statistics and performance of these processes can be recorded, reported, and optimized

Some available BPM languages are:

– BPMN 2.0

– Business Process Execution Language (BPEL)

– Web Services Choreography Description Language (WS-CDL)

– XML Process Definition Language (XPDL)


BPMN 2.0 Notation


Business Process Modeling Notation (BPMN) is a standard.

BPMN is a graphical modeling language, with symbols, relationships and attributes for the
purpose of process modeling.

Easier to understand and learn.


BPMN 2.0 continue...


BPMN 2.0 Notation continue...


What is JBPM?


JBPM is a flexible business process management (BPM) suite.

It makes the bridge between business analysts and developers.

Provide features for both

– Business Analyst

– Developers


JBPM Features


Embeddable, lightweight Java process engine, supporting native BPMN 2.0 execution.

BPMN 2.0 process modeling in Eclipse (developers) and the web (business users).

Process collaboration, monitoring and management through the Guvnor repository and the
web console.

Human interaction using an independent WS-HT task service.

Tight, powerful integration with business rules and event processing


Overview


Core Engine


Responsible for execution of the processes.


Main features of core engine

– Light weight (can be deployed on almost any device that supports a simple Java Runtime
Environment.

– Ability to migrate running process instances to a new version of their process definition

– Pluggable persistence with a default JPA implementation.


Installation of JBPM

– Prerequisites:


Java JDK 1.5+


Ant 1.7+

– Location for JBPM installer


There are two versions, a full installer which is already contains a lot of the dependencies
that are necessary during the installation and a minimal installer which is only contains the
installer and will download all dependencies at the time of installation


http://sourceforge.net/projects/jbpm/files/jBPM%205/


jBPM-{version}-installer-full.zip


Installation of JBPM continue...

– Installation Process : The easiest way to get installed is to simply run the installation script.
Go to the install folder and run :


ant install demo

– This will download following in lib directory.


Download JBoss AS

Download Eclipse

Install Drools Guvnor into JBoss AS

Install Oryx Designer into JBoss AS

Install the jBPM gwt-console into JBoss AS

Install the jBPM Eclipse plugin

Install the Drools Eclipse plugin



– After download all the artifacts, we need to start the demo.


ant start.demo

– This will start


H2 database

JBoss AS

Eclipse

Human Task Service



– Test the installation

Go to http://localhost:8080/jbpm-console/app.html for Jbpm console


Got to http://localhost:8080/drools-guvnor/org.drools.guvnor.Guvnor/Guvnor.jsp for
Guvnor repository


Eclipse Editor


The Eclipse editor is a plugin to the Eclipse IDE and allows you to integrate your business
processes in your development environment.


Targeted towards developers.


Graphical editor for creating your business processes.


Advanced testing and debugging capabilities.


Major Features :

– Integration with the knowledge repository.
– Graphical debugging, to see all the running processes.
– Plugging in your own domain specific nodes.


Web-based designer


Allows you to model your business processes in a web-based environment.


Targeted towards more business users.


Graphical editor for viewing and editing your business processes (using drag and drop).


Guvnor


A repository service to store your business processes and related artifacts.


A web-based user interface to manage your business processes

– Targeted towards business users.
– Supporting the visualization of your processes.


Collaboration features to have multiple actors.


jBPM Console


Business processes can be managed through a web console. It is targeted towards
business users and its main features are:

– Process instance management: the ability to start new process instances, get a list of
running process instances, visually inspect the state of a specific process instances, etc.

– Human task management: being able to get a list of all your current tasks (either assigned
to you or that you might be able to claim), completing tasks on your task list (using
customizable task forms), etc.

– Reporting: get an overview of the state of your application and/or system using dynamically
generated (customizable) reports, that give you an overview of your key performance
indicators (KPIs).


Knowledge Base API


The jBPM API


Knowledge Base

– First requirement to have to cickstart the process.
– Should include all the process definitions.
– Creating a knowledge base.


KnowledgeBuilder kbuilder = KnowledgeBuilderFactory.newKnowledgeBuilder()


kbuilder.add (ResourceFactory.newClassPathResource ("MyProcess.bpmn"),
ResourceType.BPMN2)


KnowledgeBase kbase = kbuilder.newKnowledgeBase();


Session


After loading your knowledgebase, you should create the session to interact with the
engine.


Session can be used to start new processes, signal events, etc.


The following code snippet shows how to create a session:


Stateful Knowledge Session ksession = kbase.newStatefulKnowledge Session();


Process Instance process Instance = ksession.startProcess ("com.sample.MyProcess");


Creating a process


A process can be created in

– Eclipse Editor (Demo)
– Web based Editor (Demo)


Activities and Events of jBPM


Script Task

User Task

Service Task

Rule Task

Start Event

End Event

Gateways ( converge and diverge)

Timer events etc.


Start Event


Start of the process.


A process should have only one start node.


No incoming connection.


Only one outgoing connection.


End Event


End of the process.


A process should have one or more end events.


One incoming connection.


No outgoing connection.


Script Task


Represent a script that should be executed in the process.




One outgoing connection.


The dialect used for coding the action is JAVA and MVEL.


User Task


Tasks to be executed by human being are handled by human tasks.




One outgoing connection.


Either group or user is mentioned with the task to determine who will perform the task.


Service Task


All the work that is executed outside a process engine is represented in service task.


Domain specific services can be defined, using unique name, defining


parameters, and results.


One incoming and one outgoing connection.


Has to be configured. (To be shown later)


Rule Task


Represent a set of rules that need to be evaluated.


One incoming and one outgoing connection.


Rules are defined in seperate Drools rule format.


Have to be configured (one example)


Gateways


Allows to create branches (diverging) or merge branches (converging).


A diverging gateway has one incoming connection and two or more outgoing connection.
Three types of gateways are there.


AND, OR and XOR.


Gateways continue


A converging gateway allows you to synchronize multiple branches.


A converging gateway has two or more incoming connections and one outgoing
connection.


AND or XOR types


Other features


Data
– Data can be retrieved, stored, passed on and used.
– Process level variables can be set when starting a process.(show in eclipse)


Constraints
– Can be used at various locations.
– For example in script tasks, diverging gateways etc


Action Scripts
– Action scripts can be used in different ways:
– within a script task
– as entry or exit actions


Connecting eclipse with guvnor


Go to File->New->Other


Select Guvnor.


Create new repository.


Select your guvnor repository on port 8080.


Select the file/process you want to add to guvnor, right click, select guvnor, select add.


Select the repository and package you want to add.


Demo


Service Task (configure a service task, run a task)


Business Rule (Drools Rule) Task


Human task (Add to Guvnor repository, deploy the package, manage and
monitor on jBPM console.


Thanks

jBPM 5.2

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