6th Expert Meeting Business Process Management (BPM) Business Activity Monitoring (BAM) Complex Event Processing (CEP)

BPEL: Definition • BPEL is an XML-based language for standardizing business processes in a distributed or grid computing environment that enables separate businesses to interconnect their applications and share data.

BPEL: Versions and History • Descends from IBMs WSFL and Microsofts XLANG,combination called BPEL4WS • BPEL4WS appeared in 1.0 and 1.0 – without being standardized yet • WS-BPEL 2.0 Spec by OASIS in September 2004 • BPEL 2.0 standardized in April 2007 • In June 2007 BPEL4People published by Active Endpoints, Adobe, BEA, IBM, Oracle and SAP

Distinction BPEL & XPDL • XPDL = XML Process Definition Language • WfMC = Workflow Management Coalition • XPDL 1.0 ratified by WfMC in 2002 • XPDL defines a XML schema for specifying the declarative part of workflow • It‘s focus is less in Process execution but in Process interchange between differnet products (Modelling tools, Workflow engines etc.)

… Extensions Core-BPEL SubProcesses HumanInteractions BPEL Standardization Model according to Prof. Frank Leymann

xmlns • XML namespaces define uniquely named elements and attributes in an XML instance • XML namespace does not require that its vocabulary be defined, though it is fairly common practice to place either a Document Type Definition (DTD) or an XML Schema IBM Modeler: xmlns:bpws=http://schemas.xmlsoap.org/ws/2004/03/business-process/ MicroTool objectiF xmlns="http://docs.oasis-open.org/wsbpel/2.0/process/executable" jCOM1 jPASS! xmlns:bpws="http://schemas.xmlsoap.org/ws/2003/03/business-process/"

Elements of BPEL • Basic Activities • Structured Activities • Partner Links • Scopes • Variables

Elements of BPELBasic and Stuctured Activities • BPEL activities perform the process logic • activities are divided into 2 classes: basic and structured • basic activities describe elemental steps of the process behavior • structured activities encode control-flow logic

Elements of BPELBasic Activities • <invoke> – calls Web Services <invoke name="checkSolvency" partnerLink="bank" portType="check" operation="checkSolvency" inputVariable="customer" outputVariable="sol"/> • <receive>- waits for message • <reply> - replies to a message

Elements of BPELBasic Activities • <assign> - updates the values of variables <assign> <copy> <from variable=“a”/> <to variable=“b”/> </copy> </assign> • <throw> - generates a fault from inside the business process • <wait> - waits for a given time of period

Elements of BPELStuctured Activities • <sequence> - sequential execution • <flow> - concurrent execution sequence flow

Elements of BPELStructured Activities • <pick> - waits for the occurrence of exactly one event • <if> - conditional behavior • <repeatUntil> - repeated execution of a contained activity

Elements of BPELPartnerLinks • <partnerLink> - describes comunication partners • the process is one of the partners, and another service is the other partner • partnerLink defines the role that the process plays and the role that the partner service plays in the particular exchange

Elements of BPELScopes • <scope> - provides the context which influences the execution behavior of its enclosed activities • this behavioral context includes activities like: variables or partner links • contexts provided by <scope> activities can be nested hierarchically

Elements of BPELVariables • <variable> - means for holding messages that constitute a part of the state of a business process • visible only in the scope in which it is defined <variables> <variable name=“a”/> <variable name=“b”/> </variables>

Betrachtung der Gesamtprojektkosten GP* ≥ 50.000 € oder FL* ≥ 10.000 € Freigabe des Anteils der Auftragsklärung ja Vorschlag priorisieren Vorschlag prüfen nein Status 5 „Projekt-Budget genehmigt“ The original business process

Step 1 Step 2 Step 3

Result Step 4

IT Forum IT Forum Projekt finanziell genehmigen Entscheidung vorbereiten Generate BPEL code in ARIS • ARIS uses ePC notation • impossible to generate BPEL Codedirectly in ARIS • vendor specific solutions avaiblee.g. Oracle BPA Suite, ARIS BPEL IDS Scheer statement* • “ePC is for functional process modelling only • BPMN if process are to be implementedor automated“ *Email: IDS Scheer December 2007 Gesamtkosten betrachten GP >= 50.000 o. FL >=10.000 GP <= 50.000 o. FL <=10.000 Status auf 3 setzen Status auf 5 setzen Status 3 Status 5

Generate BPEL code in IBM Modeler

Generate BPEL code in IBM Modeler • select project to be exported • “WebSphere Process Server“ as type

Generate BPEL code in IBM Modeler • Modeler creates one file with BPEL code • additionally several files as proprietary extension for better import into WID

Generate BPEL code in IBM Modeler • one incoming message • two tasks • one decision • two outgoing paths

Importing IBM Modeller Process in WID

Résuméa BPM hourglass According to: http://www.bpmn.org/Documents/OMG%20BPMN%20Tutorial.pdf

… Extensions Core-BPEL SubProcesses HumanInteractions Résuméstatus quo • no 100% match between BPEL 2.X and BPMN 2.0and vice versa (e.g. because of deficits of human interactions) according to Prof. Frank Leymann

RésuméToday‘s situation • no 100% match between BPEL 2.X and BPMN 2.0 and vice versa (e.g. because of deficits of human interactions) • a generic BPEL-export is hardly possible • a lot of reworking in the BPEL-platform in order to get the process ‚running‘...

RésuméOn the horizon • OMG responsible for standardization of BPEL as well as of BPMN • BPEL 3.0 expected to be released Q3/2008 • better match between BPMN 2.0 and BPEL 3.0 • easier BPEL export/imports with less reworking

Thank you for your attention. Vielen Dank für Ihre Aufmerksamkeit.

6th Expert Meeting Business Process Management (BPM) Business Activity Monitoring (BAM) Complex Event Processing (CEP)