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Taverna: Android app Taverna Mobile




      Project: Apache Taverna (incubating) http://taverna.incubator.apache.org/
      Mentors: Ian Dunlop <ianwdunlop@apache.org>, Stian Soiland-Reyes <stain@apache.org>

      Taverna Mobile: A year or so ago in conjunction with a University of
      Manchester undergraduate we developed an Android app to run Taverna
      workflows available on myExperiment (http://www.myexperiment.org)
      using Taverna Server.


      It is available here https://github.com/myGrid/taverna-mobile. Later on we updated it to use the android IDE from google/idea and the gradle build system as well as fixing some of the dependencies, see

      The code relies on some APIs from google and apache which have moved
      on since then eg the https libraries which needs updated.
      The project would be to:
      1) fix the ssl/https parts and use the latest version of taverna server (with configurable URI and username/password)
      2) update the code to remove some legacy dependencies and use the
      latest APIs
      3) improve the UI and responsiveness

      1) & 2) are the most important bits with 3) being a bit extra
      depending on how the first bits progress.

      The original app was designed for Android 18 although there are now
      various SDK levels mentioned in various manifest files. Minimal
      testing on other API levels was done, pretty much just the developers
      phone. Targeting as low an SDK version as possible would be desirable.
      Obviously not way back to Android 2 but something which allows a
      reasonable percentage of devices to use the app
      (http://developer.android.com/about/dashboards/index.html). 4.1 (SDK
      16) may be a good target.
      The app uses various dependencies, listed in the build files. However,
      these dependencies may be out of date and in fact may be unused by the
      code. They need to be cleaned up.
      The original app used a modified version of the apache http libraries
      to talk to the taverna server code because the android sdk did not
      include an up to date version and the latest versions clashed with the
      android package namespaces. Android compatible versions of recent
      versions of the apache http libaries are now available
      and I tried to use them in my 'fork' although testing was minimal.
      The mygrid taverna server library
      (https://github.com/myGrid/t2-server-jar) is used to access the
      taverna server API. This library is not actively supported and in fact
      may be too heavyweight for the app. It is not even clear what branch
      is used. The taverna server API is just a REST based API over HTTP
      (http://dev.mygrid.org.uk/wiki/display/tav250/REST+API) so some
      refactoring is a good idea. It has to be able to handle talking to a
      taverna server over HTTPS with a username/password that is not the
      default taverna/taverna one. The HTTPS may have a user created
      certificate which is not from a CA.

      Some of the UI relies on the sliding menu library by Jeremy Feinsten
      which is included directly in the src rather than via gradle. The
      provenance of the code is unclear, possible from
      https://github.com/jfeinstein10/SlidingMenu. There may be a more
      modern Android way to do that kind of UI design but I am not convinced
      that the app needs it.
      The PullToRefresh library by Chris Baines (possibly
      https://github.com/chrisbanes/Android-PullToRefresh) is used via
      gradle but again there may be a modern Android way to do things.
      One of the important tasks is to ensure that the app can be supported
      beyond the project end and that means relying on 3rd party libs that
      are actively supported.

      Think of the current app as a demonstrator. I would be happy for the
      it to be developed from scratch. There is no need for it to even be an
      Android app, a web app would be just as good as long as the
      functionality is there. In fact, that is a good way to target multiple
      mobile platforms perhaps using some apache cordova
      (http://cordova.apache.org/) for any native functionality required.

      The basic app functionality required (not an exhaustive list):
      View workflows from http://www.myexperiment.org
      Log in to http://www.myexperiment.org and view your workflows
      Talk to required parts of taverna server API over HTTPS.
      Run a workflow. Requires upload of input data and the workflow to a
      taverna server instance.
      Monitor workflow run.
      View workflow run results.
      Download results.

      The project would interest students with a good grounding in Java
      looking to get into Android mobile development.

      You would be part of he Apache Taverna community
      which would be giving advice and feedback on your

      Videoes of the current app https://www.youtube.com/playlist?list=PLs1PhQrR0xxH3j-f6FXU2cp9fBVTDrl6T

      Paper: http://arxiv.org/pdf/1309.2787v3.pdf

      Interested students should sign up to the dev@taverna mailing list to discuss their proposal in detail: http://taverna.incubator.apache.org/community/lists




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            soilandreyes Stian Soiland-Reyes (old) (Inactive)
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