Enabling Workflow in UPnP Networks Andreas BobekUniversity of Rostock Faculty of Computer Science and Electrical Engineering Andreas Bobek, Hendrik Bohn, Frank Golatowski University of Rostock Faculty of Computer Science and Electrical Engineering Gerd Kachel, Andreas Spreen kachel GmbH 3rd International IEEE Conference on Industrial Informatics INDIN´05 10th – 12th August, 2005, Perth, Australia Enabling Workflow in UPnP Networks

University of Rostock Faculty of Computer Science and Electrical Engineering Outline Enabling Workflow in UPnP Networks 1. Workflow 2. UPnP 3.UPnP Plug-In for Workflow Management System 4.Workflow Management System as UPnP Device 5.Scenario 6.Conclusions Andreas Bobek Slide 1 of 19

University of Rostock Faculty of Computer Science and Electrical Engineering Enabling Workflow in UPnP Networks "The term workflow refers to the automation of a business process, in whole or part, during which documents, information or tasks are passed from one participant to another for action, according to a set of procedural rules." (The Workflow Management Coalition Specification) 1. Workflow Andreas Bobek Slide 2 of 19

University of Rostock Faculty of Computer Science and Electrical Engineering Enabling Workflow in UPnP Networks 1. Workflow - Example Andreas Bobek Slide 3 of 19

University of Rostock Faculty of Computer Science and Electrical Engineering Enabling Workflow in UPnP Networks 1. Workflow - Workflow Reference Model Andreas Bobek Slide 4 of 19

University of Rostock Faculty of Computer Science and Electrical Engineering Enabling Workflow in UPnP Networks -process definition -definition of a business process (XML Process Definition Language = XPDL) -Workflow Management System -container for workflow engines, process definitions and connectors to external applications or systems (e.g. plug-ins) -creates workflow instances of process definitions at runtime -workflow engine -executes processes according to their definition -interacts with other engines, with users and external applications 1. Workflow Andreas Bobek Slide 5 of 19

University of Rostock Faculty of Computer Science and Electrical Engineering Enabling Workflow in UPnP Networks -UPnP = Universal Plug and Play -supports ad-hoc networking of devices and services -only protocols are defined (UDP, TCP, SOAP, SSDP, GENA, HTTP) -independent of programming language, operating system and transmission medium -six phases: addressing, discovery, description, control, eventing, and presentation -defines two communicating components: device (+ service), control point 2. UPnP Andreas Bobek Slide 6 of 19

University of Rostock Faculty of Computer Science and Electrical Engineering Enabling Workflow in UPnP Networks -offers services (device is a server) -may contain other devices -characterized by properties such as model number, model name, vendor... -uniquely identifiable by UUID 2. UPnP - Components -interface to the device -offers actions and URLs for controlling, eventing, and presentation -manages its state in state variables device service control point -searches for devices and/or services -invokes actions (control point is a client) Andreas Bobek Slide 7 of 19

University of Rostock Faculty of Computer Science and Electrical Engineering Enabling Workflow in UPnP Networks 2. UPnP - Components Andreas Bobek Slide 8 of 19

University of Rostock Faculty of Computer Science and Electrical Engineering UPnP Stack Enabling Workflow in UPnP Networks Andreas Bobek Slide 9 of 19

University of Rostock Faculty of Computer Science and Electrical Engineering Enabling Workflow in UPnP Networks 1.enriching workflow management systems with UPnP capabilities 2.enriching UPnP networks by integrating workflow management systems as UPnP devices Possibilities of integration Andreas Bobek Slide 10 of 19

University of Rostock Faculty of Computer Science and Electrical Engineering Enabling Workflow in UPnP Networks 3. UPnP Plug-In for Workflow Management System Andreas Bobek Slide 11 of 19

University of Rostock Faculty of Computer Science and Electrical Engineering Enabling Workflow in UPnP Networks 3. UPnP Plug-In for Workflow Management System Andreas Bobek Slide 12 of 19

University of Rostock Faculty of Computer Science and Electrical Engineering Enabling Workflow in UPnP Networks -consider UPnP network as external applications -usual way to access external applications is via plug-ins -plug-in for UPnP networks is an UPnP Control Point 3. UPnP Plug-In for Workflow Management System Andreas Bobek Slide 13 of 19

University of Rostock Faculty of Computer Science and Electrical Engineering Enabling Workflow in UPnP Networks 4. Workflow Management System as UPnP Device Andreas Bobek Slide 14 of 19

University of Rostock Faculty of Computer Science and Electrical Engineering UPnP Stack Enabling Workflow in UPnP Networks Andreas Bobek Slide 15 of 19

University of Rostock Faculty of Computer Science and Electrical Engineering 1.2. UPnP Stack Enabling Workflow in UPnP Networks Andreas Bobek Slide 16 of 19

University of Rostock Faculty of Computer Science and Electrical Engineering Enabling Workflow in UPnP Networks start, run, stop, status, result register, unregister Workflow Management System as UPnP Device Andreas Bobek Slide 17 of 19

University of Rostock Faculty of Computer Science and Electrical Engineering Enabling Workflow in UPnP Networks 5. Scenario Andreas Bobek Slide 18 of 19

University of Rostock Faculty of Computer Science and Electrical Engineering Enabling Workflow in UPnP Networks 5. Scenario Andreas Bobek Slide 18 of 19 runSlideShow(imageURIs, mediaRendererUUID, delay)

University of Rostock Faculty of Computer Science and Electrical Engineering Andreas Bobek Slide 19 of 19 Enabling Workflow in UPnP Networks 6. Conclusions -Workflow – appropriate solution for automatic control of devices -reusability of workflow tools (modeler, monitoring...) in UPnP networks and reusability of execution engines -Workflow Management System for managing UPnP networks (monitoring and controlling) -UPnP as a further interface for installing, running and controlling workflow processes -business processes (applications) => technical processes (+devices) -devices replaceable during runtime