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Houston: We are in overload. Gail Murphy University of British Columbia. Note: This presentation involves many animations, videos , etc. Some of these are available on-line (avi files will attempt to play). Those that are not are indicated.

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Houston we are in overload

Houston: We are in overload

Gail Murphy

University of British Columbia

Note: This presentation involves many animations, videos , etc. Some of these are availableon-line (avi files will attempt to play). Those that are not are indicated.

Material in this talk is licensed under a Creative Commons Attribution-Share Alike 3.0 Unported license.




  • un·ex·pect·ed

  • coming without warning; unforeseen

  • bugs, “found design”, missing documentation, regressions, …



source code

search results

file containment

type hierarchy

class structure


50 lines

3 search hits

60 file items

5 type items

25 class items


source code

search results

file containment

type hierarchy

slass structure

50 lines

3 search hits

60 file items

5 type items

25 class items

grows to hundreds andthousandsfor complete task


Cartoon not licensed for web version


  • mismatches between programmers and tools

  • enabling focus and flow for programmers




  • mismatch #1

  • questions programmers ask

  • vs.

  • questions tools answer


Which type represents

this domain concept?

Who implements this interface?

What are the differences

between these types?

What are the parts

of this type?

How are these types related?

What data can we access from this object?

What code is involved in

the implementation

of this behaviour?

Sillito, Murphy, De Volder, FSE 2006



  • mismatch #2

  • information programmers need

  • vs.

  • information tools show


  • “In a delocalized plan, pieces of code that are conceptually related are physically located in non-contiguous parts of the program”

  • — Soloway, Pinto, Letovsky, Littman and Lampert, CACM1988

  • “the programmers’ central goal for each maintenance task was to collect a working set of task-relevant code fragments”

  • — Ko, Aung, Myers, ICSE 2005


  • mismatch #3 conceptually related are physically located in non-contiguous parts of the program”

  • strategies programmers use

  • vs.

  • strategies tools support


click to play animations (avi) conceptually related are physically located in non-contiguous parts of the program”

Allen, Murphy, de Alwis, 2007


Shepherd, Murphy, 2007 conceptually related are physically located in non-contiguous parts of the program”


  • mismatches between programmers and tools

  • questions

  • information

  • strategies

  • enabling focus and flow for programmers


focus conceptually related are physically located in non-contiguous parts of the program”

flow

flow

focus

focus


focus conceptually related are physically located in non-contiguous parts of the program”

click to play animations (avi)


flow conceptually related are physically located in non-contiguous parts of the program”

Click to play animation form

click to play animations (avi)


  • enabling conceptually related are physically located in non-contiguous parts of the program”focus and flow

  • structure


currently


with Ferret

de Alwis, Murphy, 2007


with Ferret

sphere #1

sphere #2

de Alwis, Murphy, 2007


with Ferret

de Alwis, Murphy, 2007


with Ferret

focus

flow

based on a small diary study

de Alwis, Murphy, 2007


with Mylyn

currently

Kersten, Murphy, 2007


with Mylyn

interest

Kersten, Murphy, 2007


with Mylyn

click to play screencast (avi)

(demo portion unavailable on-line)

Kersten, Murphy, 2007


with Mylyn

flow

focus

based on a field studyand huge user community (1M+ downloads)

Kersten, Murphy, 2007


currently

click to play screencast (avi)


with web-style navigation

click to play demo (avi)


with web-style navigation

demo unavailable on-line

Sherwood, Murphy, 2007


with web-style navigation

flow

focus

tbd


  • a lurking problem conceptually related are physically located in non-contiguous parts of the program”

video used in talk unavailable on-line


  • a looming problem conceptually related are physically located in non-contiguous parts of the program”


  • a looming problem conceptually related are physically located in non-contiguous parts of the program”

  • more artifacts, looser structure


  • what to do? conceptually related are physically located in non-contiguous parts of the program”

  • 1. enhance system structure model

  • 2. rethink the model(s) behind the tools


meghan allen conceptually related are physically located in non-contiguous parts of the program”john anvikelisa baniassadwesley coelhodavor cubranicbrian de alwisrob elvesthomas fritzjan hannemannlyndon hiewreid holmesmik kerstenseonah leeshawn mintomartin robillardizzet saferdavid shepherdducky sherwoodannie yingtrevor youngrobert walkerand others!


  • so… conceptually related are physically located in non-contiguous parts of the program”information

  • information

  • information

  • information

  • information

  • Information

  • information

Cartoon not licensed for web version


  • mismatch conceptually related are physically located in non-contiguous parts of the program”

  • questions information strategies


cartoon not licensed for web version conceptually related are physically located in non-contiguous parts of the program”

{add, compute, present} informationwith focus and flow

to manage information effectively


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