The document discusses an interactive visualization system for software components using virtual reality headsets, developed by Andreas Schreiber and Marlene Brüggemann at the German Aerospace Center. It details the architecture of OSGi-based applications, use cases for visualization, and future developments such as voice interaction and support for multiple users. The presentation emphasizes the advantages of visual representation in understanding large software systems and facilitating team collaboration.

1. Interactive Visualization of Software Components
with Virtual Reality Headsets
Andreas Schreiber and Marlene Brüggemann
German Aerospace Center (DLR)
Cologne / Berlin, Germany
> VISSOFT 2017 > A. Schreiber, M. Brüggemann • Interactive Visualization of Software Components with Virtual Reality Headsets > 18.09.2017DLR.de • Chart 1

2. Software for Design and Simulation in Space, Aeronautics, Transportation, …
> VISSOFT 2017 > A. Schreiber, M. Brüggemann • Interactive Visualization of Software Components with Virtual Reality Headsets > 18.09.2017DLR.de • Chart 2

3. OSGi-based Applications
Large applications at DLR are based
on OSGi (Eclipse RCP)
• RCE
• VirSat
• SUMO
Developed by Teams
• >5 members
• Usually high labor turnover
> VISSOFT 2017 > A. Schreiber, M. Brüggemann • Interactive Visualization of Software Components with Virtual Reality Headsets > 18.09.2017DLR.de • Chart 3

4. OSGi
OSGi Specification
• Module system and service platform for Java
• Bundles
• Normal components (JARs) with extra
manifest headers
• Contain packages, which contain classes
• Services
• Java objects with Java interfaces
• Connect bundles dynamically
• Dependencies
• Import and Export of code between
bundles
> VISSOFT 2017 > A. Schreiber, M. Brüggemann • Interactive Visualization of Software Components with Virtual Reality Headsets > 18.09.2017DLR.de • Chart 4
Source: D. Seider, A. Schreiber, T. Marquardt and M. Brüggemann, "Visualizing
Modules and Dependencies of OSGi-Based Applications," 2016 IEEE Working
Conference on Software Visualization (VISSOFT), Raleigh, NC, 2016, pp. 96-100.

5. Uses Cases for Visualization of OSGi-based Applications
Use Cases
• Getting an impression of the
dimensions of the application
• Introducing a new member of the
development team
• Starting to work on a new module
• Checking for abnormalities in
the architecture
> VISSOFT 2017 > A. Schreiber, M. Brüggemann • Interactive Visualization of Software Components with Virtual Reality Headsets > 18.09.2017DLR.de • Chart 5
Requirements
• General overview about the system
• Interactive exploration
• Multiple remote users (team members)

6. 2D or 3D?
> VISSOFT 2017 > A. Schreiber, M. Brüggemann • Interactive Visualization of Software Components with Virtual Reality Headsets > 18.09.2017DLR.de • Chart 6
Source: D. Seider, A. Schreiber, T. Marquardt and M. Brüggemann, "Visualizing
Modules and Dependencies of OSGi-Based Applications," 2016 IEEE Working
Conference on Software Visualization (VISSOFT), Raleigh, NC, 2016, pp. 96-100.

7. Visual Representation
> VISSOFT 2017 > A. Schreiber, M. Brüggemann • Interactive Visualization of Software Components with Virtual Reality Headsets > 18.09.2017DLR.de • Chart 7
Bundle
Packages
Services
Classes
Imports
Exports

8. Implementation
Framework
• Unity
Devices
• Oculus Rift and Google Cardboard
Data Source
• JSON model file
> VISSOFT 2017 > A. Schreiber, M. Brüggemann • Interactive Visualization of Software Components with Virtual Reality Headsets > 18.09.2017DLR.de • Chart 8

9. > VISSOFT 2017 > A. Schreiber, M. Brüggemann • Interactive Visualization of Software Components with Virtual Reality Headsets > 18.09.2017DLR.de • Chart 9

10. > VISSOFT 2017 > A. Schreiber, M. Brüggemann • Interactive Visualization of Software Components with Virtual Reality Headsets > 18.09.2017DLR.de • Chart 10

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12. Future Work
General future work
• Graph database
• User study (w/eye tracking device)
• Voice interaction (digital assistants)
• Support for multiple users
Next version
• Developed for HTC Vive
• Changed visual concept
• AR version for Microsoft HoloLens
> VISSOFT 2017 > A. Schreiber, M. Brüggemann • Interactive Visualization of Software Components with Virtual Reality Headsets > 18.09.2017DLR.de • Chart 12

13. > 2nd European GeoInformation Symposium > A. Schreiber • Traceability and Reproducibility of Big Data Analytics Workflows Using Provenance > 21.06.2017DLR.de • Chart 13
Thank You!
Questions?
Andreas.Schreiber@dlr.de
www.DLR.de/sc | @onyame