20061122 JBoss-World Experiences with JBoss jBPM

experiences with JBoss jBPM camunda GmbH Bernd Rücker CEO camunda GmbH / Consultant [email_address]

Who we are
camunda GmbH, near Stuttgart, Germany
small company (3 developer / consultants)
Main focus is consulting and developing in the fields of
enterprise software with Java EE
business process engines
business rules
Very good experiences with open source tools
JBoss jBPM
Jboss Rules (aka Drools)
Hibernate
Jack-Rabbit (Java Content Repository / JCR)
Pentaho (Open Source BI-Suite)
I am comitter in the JBoss jBPM project
contact: bernd.ruecker@camunda.com

Agenda
Projects examples with jBPM
ERP-System for retail company www.mad-moxx.de
Order Management System for german telco
Typical problems
Understanding of jPDL
Transactions
Pageflows in web-application / JBoss seam
Good practices in our projects
Generic Java Swing GUI
Java Swing Admin-Client
Generated documentation website
Test framework
Generate code to support development

Project 1
customer: „mad-moxx“, the graphics cards specialist
webshop (>3000 vistors and > 150 orders per day, 9 employees)
wholesale for graphics cards
service handling
complicated serial number handling
used cards stock and sellings
 special business processes
Our tasks
optimizing grown business processes
replace the not matching erp system

Architecture mySQL ejb container Swing-GUI Session Bean Session Bean business logic jBPM JDO local interface remote interface mySQL Hibernate other services

Architecture - process is a facade! mySQL mySQL Swing-GUI Session Bean Session Bean business logic Hibernate JDO local interface remote interface
Accessing / changing business objects directly
Reports
…
starting processes
work on tasks
jBPM other services

Association with process context

Architecture - transactions mySQL Swing-GUI Session Bean Session Bean business logic jBPM JDO local interface remote interface 1 XA transaction mySQL Hibernate other services

It‘s a SOA  Source: Sun presentation at the Java Forum Stuttgart, 2005

Environment
JBoss 4 Cluster (2 Server for failover)
JDO for persistence of business objects
Hibernate as persistence mechanism of jBPM
mySQL 5 Cluster (2 Server), XA capable JDBC driver
Java 5 (client & server)
Java Swing and Java Webstart

Project 2
customer: german telco
handling of complicated order process
many dependencies to other systems
subsystems are controlled by the process

Architecture RMI / Web-Services App-Server / RMI processes IF Subsystem: A UseCase: doSth Token: 0815 Data: … System A UseCase: doSth Data: … ETR Subsystem: A UseCase: doSth Token: 0815 Result: … Order-System System … jbpm actions jbpm actions

Architecture RMI / Web-Services App-Server / RMI processes IF Subsystem: A UseCase: doSth Token: 0815 Data: … System A UseCase: doSth Daten: … ETR Subsystem: A UseCase: doSth Token: 0815 Result: … Order-System System … jbpm actions jbpm actions compare to Enterprise-Service-Bus

Environment
JBoss 4 Cluster (2 Server)
EJB 3 Entity & Session Beans (JBoss preview)
jbpm 3.1
Oracle 10g Cluster
Java 1.5
Java Swing and Java Webstart

Agenda
Typical problems
Transactions
Test framework

node, task-nodes & states Keep in mind: if you forget a task-assignment in a task-node it is a node!

Think about transactions!

So what to do?
patterns can be arbitrary complex
typically can not be handled by a business guy
asynchronism is the general solution
 compare to BPEL
commit transaction (since jbpm 3.1: async=„true“)

Sequence diagram Application Server Client jBPM-Facade (SLSB) jBPM Action 1. Transaktion Businesslogik SLSB start process get definition create process instance set variables signal execute do something end task get task end execute do something 2. Transaktion

process / workflow / pageflow
Sample webapp / Seam can mislead to mix them
pageflow: html-pages to fullfill a certain use case
workflow: typically automated, maybe one step in a business process
business process: not focused on a application but on the business process as a whole, consider the context
A clear seperation is important
Maybe a solution with sub-processes and a naming schema is feasible

More topics to think about
process variables
store objects? Serialization?
store keys only?
task controller misleads to use only primary types
compensation actions
…
state 1 state 2 state 3 action compensating action equivalent states

long lasting transactions processes action compensating action Business services Failed action Anwendung 1 commit begin T1 Anwendung 1 commit begin T1

Agenda
Typical problems
Transactions
Test framework

Java Swing GUI node-name token-id process data / variables possible transitions documentation website

Documentation website
example
generated image map (simple xslt)
short documentation html-page
links to wiki

Admin-Client 1

Admin-Client 2 variables log
tokens / tasks
Commands:
Signal tokens
end tasks
cancel processes
…

Admin Client 3 object inspector included

Testframework ProcessTestRunner testRunner = new ProcessTestRunner("Testprozess"); testRunner.addInputVariable(ProzessVariablesEnum.CustomerAddress, address); //////////////// // confiugure Path to the next task node / end ProcessTestRunner subTestRunner = testRunner.addExpectedSubprocesses( "CustomerCreation" ); subTestRunner.addExpectedState("Node1"); subTestRunner.addExpectedState("Node2"); subTestRunner.addExpectedOutputVariable(ProzessVariables.ResultCustomerCreation, Boolean.valueOf(true)); //.... subTestRunner.subprocessFinished(); //////////////// // confiugure Path to the next task node / end testRunner.addExpectedNode("xy"); testRunner.addInputVariable("xy", new Integer(0));

Testframework (continued) testRunner.startFork(); testRunner.useForkPath(1); testRunner.addExpectedNode("xy"); testRunner.addJoin(); testRunner.useForkPath(2); testRunner.addJoin(); testRunner.addExpectedTask("XXX"); long taskId = testRunner.runToNextTaskNode(5); services.continueAdresseKorrigieren(taskId, new Address()); testRunner.taskEnded(); testRunner.useForkPath(3); testRunner.addExpectedNode("xy"); testRunner.addExpectedTask("XXX"); long taskId = testRunner.runToNextTaskNode(5); testRunner.finishFork(); // run until end of process testRunner.runToEnd(7); testRunner.assertFinished(); testRunner.assertPath();

code-generation
some ideas
Data-Binding for GUI
constants or enums for variables, process-, state- and transition-names (at least for unit tests)
superclass for actions or decisions
…
public abstract static class GeneratedDecideIdentifiedGoodsHandler implements DecisionHandler { public String decide(ExecutionContext executionContext) { try { return decide(new ProcurementProcessModel(executionContext)); } catch (BusinessException ex) { throw new ProcessDefinitionException("BusinessException during decision", ex); } } public abstract String decide(ProcurementProcessModel model) throws BusinessException; protected static final transient String RESULT_identified = "identified"; protected static final transient String RESULT_unidentified = "unidentified"; }

upcoming book
Including 3 chapters on integration:
Integration in Java EE
JBoss jBPM
BPEL with Oracle
available in december 2006

Thank you for listening! Q & A

20061122 JBoss-World Experiences with JBoss jBPM

by camunda services GmbH on Nov 14, 2009

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20061122 JBoss-World Experiences with JBoss jBPM — Presentation Transcript