What's in Juno and what will be in Kepler?

1. Eclipse Code
Recommenders
What’s
in
Juno
and
what
will
be
in
Kepler?
tw:
@MarcelBruch h
g+:
+Marcel
Bruch ric
p
Zu
m
Ca
mo
De
Samstag, 23. Juni 2012

2. Samstag, 23. Juni 2012

3. Eclipse
Code
Recommenders
All Frameworks Code
Code
Developers Who Called “new Text()” Also Called
setText() addListener() setLayout() setFont()
89% 53% 99% 35%
What Do Developers Ultimately Override After Extending This Class?
100 % overwrote
PreferencePage.createContents()
96 % overwrote
PreferencePage.performOk()
5 % overwrote
PreferencePage.performCancel()
Samstag, 23. Juni 2012

4. “Other
developers
frequently
bought
used
the
following
methods…”
INTELLIGENT
CODE
COMPLETION
Samstag, 23. Juni 2012

5. Code
Comple6on…
@Override
protected Control createDialogArea(final Composite parent) {
Composite container = (Composite) super.createDialogArea(parent);
swtTextWidget = new Text(container, SWT.BORDER);
swtTextWidget.|
return container;
}
What
does
a
developer
need,
i.e.,
which
methods
should
the
code
compleHon
present
to
him?
Samstag, 23. Juni 2012

6. Samstag, 23. Juni 2012

7. All
164
Methods
of
Text
?
Samstag, 23. Juni 2012

8. Intelligent
Call
Comple6on
...
what
the
developer
actually
needed.
Samstag, 23. Juni 2012

9. “BecausePureCamelCaseMatching****s!”
SUBWORDS
COMPLETION
Samstag, 23. Juni 2012

10. Clean
Code
encourages
you
to
use
speaking
method
names.
But
some6mes....
Samstag, 23. Juni 2012

11. 10
Samstag, 23. Juni 2012

12. ABen
6 on:
W
e
are
leavin
g
“what
’s
the
re”
no
w!
“Rethinking
your
tool
suite.
Again.”
WHAT’S
PLANNED
FOR
KEPLER?
Samstag, 23. Juni 2012

13. “Oh
SWT
-­‐
your
style
bits...”
RETHINKING
ARGUMENT
GUESSING
Samstag, 23. Juni 2012

14. Oh
SWT,
your
style
bits...
@Override
protected Control createControl(final Composite parent) {
! ! textWidget = new Text(toolbar, SWT.BORDER);
! ! textWidget.addListener(eventType, listener)
Which
event
type,
i.e.,
which
int
constant
defined
somewhere,
should
he
insert
here?
0?
13
Samstag, 23. Juni 2012

15. Samstag, 23. Juni 2012

16. SWT.<^Space>?
454
Samstag, 23. Juni 2012

17. SWT.<^Space>?
454 ±
3
Samstag, 23. Juni 2012

18. What
you’d
like
to
see
is...
15
Samstag, 23. Juni 2012

19. e4
Annota6on
Recommender
16
Samstag, 23. Juni 2012

20. “Why
is
was
Google
Codesearch
not
‘google
for
code
search’?
”
RETHINKING
CODE
SEARCH
Samstag, 23. Juni 2012

21. What
do
you
think?
18
Samstag, 23. Juni 2012

22. How
many
request
per
minutes
do
code
search
engines
have?
Samstag, 23. Juni 2012

23. 20
Number
for
koders.com
in
2009
according
to
“Analyzing
and
mining
a
code
search
engine
usage
log”
hBp://dx.doi.org/10.1007/s10664-­‐010-­‐9144-­‐6 20
Samstag, 23. Juni 2012

24. “Templates
meet
Social
and
Machine
Learning!”
RETHINKING
CODE
SNIPPETS
Samstag, 23. Juni 2012

25. Eclipse
Java
Templates
42x
Java
Templates.
35x
SWT
Templates.
Samstag, 23. Juni 2012

26. The
rise
of
code
snippet
repositories
and
many
more...
Samstag, 23. Juni 2012

27. Snipmatch:
Community
provided,
searchable
templates...
Samstag, 23. Juni 2012

28. “People
who
‘bought’
this
NullPointerException
typically
fixed
this
by...”
RETHINKING
STACKTRACE
SEARCH
Samstag, 23. Juni 2012

29. But
what
if
you
get
this?
Samstag, 23. Juni 2012

30. Debugging
–
the
old
way
Samstag, 23. Juni 2012

31. Debugging
–
the
old
way
Samstag, 23. Juni 2012

32. Debugging
–
the
old
way
Samstag, 23. Juni 2012

33. But
more
oden
we
get…
Samstag, 23. Juni 2012

34. How
can
we
fix
that?
Don’t
stacktraces
share
some
commonali6es?
org.eclipse.swt.SWTException: Invalid thread access
at org.eclipse.swt.SWT.error(SWT.java:3884)
at org.eclipse.swt.SWT.error(SWT.java:3799)
at org.eclipse.swt.SWT.error(SWT.java:3770)
at org.eclipse.swt.widgets.Widget.error(Widget.java:463)
at org.eclipse.swt.widgets.Widget.checkWidget(Widget.java:355)
at org.eclipse.swt.widgets.ProgressBar.setSelection(ProgressBar.java:317)
at org.eclipselabs.cr.stacktraces.demo.ThreadDemo$1.run(Unknown Source)
at java.lang.Thread.run(Thread.java:619)
Samstag, 23. Juni 2012

35. How
can
we
fix
that?
Don’t
stacktraces
share
some
commonali6es?
org.eclipse.swt.SWTException: Invalid thread access
at org.eclipse.swt.SWT.error(SWT.java:3884)
at org.eclipse.swt.SWT.error(SWT.java:3799)
at org.eclipse.swt.SWT.error(SWT.java:3770)
at org.eclipse.swt.widgets.Widget.error(Widget.java:463)
at org.eclipse.swt.widgets.Widget.checkWidget(Widget.java:355)
at org.eclipse.swt.widgets.ProgressBar.setSelection(ProgressBar.java:317)
at org.eclipselabs.cr.stacktraces.demo.ThreadDemo$1.run(Unknown Source)
at java.lang.Thread.run(Thread.java:619)
Samstag, 23. Juni 2012

36. How
about
“stacktrace
recommenders”?
Samstag, 23. Juni 2012

37. 4
Tool
Candidates
for
Eclipse
Kepler
❶
Arguments
&
AnnotaHon
❷
Code
Search
Recommender
❺
One
of
these!
❸
Code
Snippet
Mining ❹
Stacktrace
Search
32
Samstag, 23. Juni 2012

38. hBp://eclipse.org/recommenders/
Follow
me
on
twiBer:
@MarcelBruch
google+:
+Marcel
Bruch 33
Samstag, 23. Juni 2012