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NewWave - Workflow engine

Talk from IWST at ESUG19, Cologne, Germany

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NewWave - Workflow engine

  1. 1. NewWave - Workflow engine Sebastijan Kaplar, Miroslav Zarić, Gordana Milosavljević University of Novi Sad Faculty of Technical Sciences
  2. 2. NewWave • Open-source workflow engine • Natively written in Pharo • In-development
  3. 3. Ideas • Extensible workflow management system • Facilitate easy specification and implementation of business logic • Integration with other applications and tools • Distributing NewWave over multiple Pharo images (enabling orchestration and communication between them) • Act independently
  4. 4. Real life usage scenarios • Interactive workflows • Steps in the workflow executed by one or more users • Partially or completely automated workflows • Some tasks in the workflow can be delegated to the software component, service or other automated component • IoT and BPM
  5. 5. Supported patterns • Sequence ( sequential routing ) • Conditional routing ( XOR-split ) • Parallel routing ( AND-split ) • Synchronization ( AND-join )
  6. 6. Designing the workflow • No graphical workflow editor/designer ( for now) • Specification of the workflow accomplished directly in the Pharo environment • Inspection possible with Roassal
  7. 7. Sequence
  8. 8. Sequential routing
  9. 9. Parallel - Split/Join
  10. 10. Tasks • BaseTask • ScriptTask • UserTask • CustomTask
  11. 11. Events • Supported events: • Start • End • Intermediate (Timer event, Announcement events) • Boundary events (controlling task execution)
  12. 12. Native Libraries • TaskIt • Announcements • Roassal • NeoJSON • Teapot • Mustache
  13. 13. Important Questions • Refining the assignment mechanism • DB Storage of process definitions and process instances • UI for process execution environment • Interacting with the engine
  14. 14. Interacting with the engine (How to) • Creating a plugin that will send/receive data from the engine • Data exchanged using REST via JSON/STON something else? • Seaside/MDL or Teapot/Mustache?
  15. 15. Recent work/experimental • Added Teapot server to the engine • Serving tasks as JSON • Plugin for obtaining tasks from server • Rendering the form using mustache • Submitting the results to server

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Talk from IWST at ESUG19, Cologne, Germany

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