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jBPM 5.2

Interesting Insights on jBPM 5.2

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jBPM 5.2

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  1. 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

  2. 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.

  3. 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)

  4. 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.

  5. BPMN 2.0 continue...

  6. BPMN 2.0 Notation continue...

  7. 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

  8. 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

  9. Overview

  10. 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.

  11. 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

  12. 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

  13. Installation of JBPM continue... – 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

  14. Installation of JBPM continue... – 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

  15. 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.

  16. 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).

  17. 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.

  18. 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).

  19. Knowledge Base API

  20. 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();

  21. 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");

  22. Creating a process A process can be created in – Eclipse Editor (Demo) – Web based Editor (Demo)

  23. Activities and Events of jBPM Script Task User Task Service Task Rule Task Start Event End Event Gateways ( converge and diverge) Timer events etc.

  24. Start Event Start of the process. A process should have only one start node. No incoming connection. Only one outgoing connection.

  25. End Event End of the process. A process should have one or more end events. One incoming connection. No outgoing connection.

  26. Script Task Represent a script that should be executed in the process. One incoming connection. One outgoing connection. The dialect used for coding the action is JAVA and MVEL.

  27. User Task Tasks to be executed by human being are handled by human tasks. One incoming connection. One outgoing connection. Either group or user is mentioned with the task to determine who will perform the task.

  28. 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)

  29. 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)

  30. 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.

  31. 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

  32. 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

  33. 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.

  34. 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.

  35. Thanks

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