Introducing Language-Oriented Business Applications - Markus Voelter

L
O
B
A
Language-‐Oriented
Business
Applica4ons
Markus
Völter
voelter@acm.org
www.voelter.de
@markusvoelter
Introducing

1
Business
Agility
2
Language
Workbenches
3
JetBrains
MPS
4 LOBA
Examples
+
Demo
5 The
Big
Picture
6
Summary

Expressivity
for
Core
Domain
Knowledge
User-‐Friendly
Nota4on
Tes4ng
Meaningful
Analyses
Synthesis
of
SoZware

Any
number
of
technologies,
frameworks
and
Tools.

Word,
Excel
and
ugly,
unproduc4ve
web
apps.

Let
Business/Domain
people
contribute
directly!
Give
them
expressive,
produc4ve
tools
to
do
so!

DSL
DSL
generator
interpreter

DSL
generator
interpreter
An
old
idea
from
the
1970s.
BUT...

Language
Workbench
(Mar4n
Fowler)

Language
Workbench
(Mar4n
Fowler)
Freely
define
integrate
them
languages
and

Language
Workbench
(Mar4n
Fowler)
Freely
define
integrate
them
languages
and
+
more
detailed
criteria
I
will
omit
here

Language
Workbench
(Mar4n
Fowler)
+
powerful
edi4ng
tes4ng
refactoring
debugging
teamwork
language
defini4on
implies
IDE
defini4on

LWBs
make
Languages
Easier
Blur
the
dis4nc4on
between
programming
and
modeling.
Several
different
LWBs
exist.
h4p://languageworkbenches.net

Open
Source
Apache
2.0
hep://jetbrains.com/mps

[Language
Workbench]
+ Refactorings, Find Usages, Syntax Coloring, Debugging, ...

[Projec4onal
Edi4ng]
Parsing
Projec4onal
Edi4ng

[Projec4onal
Edi4ng]
Syntac4c
Flexibility
Regular
Code/Text
Mathema4cal
Tables
Graphical

[Projec4onal
Edi4ng]
Language
Composi4on
L2
L1
Separate
Files
In
One
File
Type
System
Transforma4on
Constraints
Type
System
Transforma4on
Constraints
Syntax
IDE
50+
extensions
to
C
10+
extensions
to
requirements
lang.

Projec4onal
Edi4ng
provides
syntac4c
flexibility
and
lang.
extensibility.
Usability
Issues
are
mostly
solved.
MPS
is
great,
but
alterna4ves
exist.

[Enterprise
Applica4on]
Modellwerkstae
Retail:
Invoice
Checking,
Cash
Point
Con-‐
trolling,
Purchasing
Contracts,
Inventory
Mgt
End
Users:
40
users,
several
sites
Language
Users:
6
Language
Developers:
1.5
h4p://www.modellwerksta4.org/
Size
of
System/Data:
??

[Enterprise
Applica4on]
Modellwerkstae

[Enterprise
Applica4on]
Bundesagentur
für
Arbeit
Government
Administra4on:
IT
system
for
the
German
employment
agency
End
Users:
120.000
Language
Users:
60
in
6
Scrum
Teams
Language
Developers:
>
10
Size
of
System/Data:
5.000
model
(text)
files
with
400
UI
masks
(when
done),
300
enTTes,
1.100
operaTons.
Database
8TB.
70
App
Servers,
15
Linux
Boxes.

[Enterprise
Applica4on]
Bundesagentur
für
Arbeit

[Business
Applica4on]
Insurance
Configura4on
Tool
Insurance
Contract
Defini4on:
Insurance
Math,
data
types,
business/payment
rules
End
Users:
Thousands
Language
Users:
Dozens
Language
Developers:
3
Size
of
System/Data:
??

[Business
Applica4on]
Insurance
Configura4on
Tool

[Business
Applica4on]
Insurance
Configura4on
Tool
<no
variables>
<no
parent>
<no
libraries>
<no
business
objects>
<no
parent>

[Business
Applica4on]
Insurance
Configura4on
Tool
Insurance
Contract
Defini4on:
Insurance
math,
pension
payment
rules
End
Users:
Thousands
Language
Users:
Dozens
Language
Developers:
3
Size
of
System/Data:
??

[Tax/Benefits
Applica4on]
Dutch
Tax
Agency
(Evalua4on)
Benefits
Calcula4on:
End
Users:
Hundreds
Language
Users:
15
Language
Developers:
2
Size
of
System/Data:
Process
data
for
6
million
ciTzens,
250
data
types,
160
business
concepts,
400
message
types,
100
business
funcTons,
10
services

[Tax/Benefits
Applica4on]
Dutch
Tax
Agency
(Evalua4on)

[Business
Applica4on]
Telco
Demo
App
Telco
Price
Calcula4ons:
Data
structures,
math
rules,
business
rules,
contract
definiTons
End
Users:
-‐-‐
Language
Users:
-‐-‐
Language
Developers:
1
Size
of
System/Data:
-‐-‐

[Business
Applica4on]
Telco
Demo
App

[LOBA]
Lang 1
System: LWB
Lang 2 Lang 3
Lang 4 Lang 5 ...
Lang N

[LOBA]
Core
Business
Logic } Business Rules
(Financial) Calculations
Data Structures
Mappings or Queries
Validations
Scientific Processes
Contracts
Processes
UI

Most
business
people
are
able
to
and
want
to
express
themselves
precisely!
Let‘s
give
them
the
tools
to
do
it!

Languages/
IDEs
Forms/
Applica4ons
L
O
B
A

Applica4ons
are
ways
to
work
with
Data.

Tools
are
ways
to
work
with
Data.
{author
read
analyze
process

Data
Formats
are
almost
Languages.

[almost]
} Language
Structure,
Constraints,
SemanTcs
Data
Format
+
Syntax
+
IDE
Language
Engineering
Language
Workbenches
author
analyze
compose
execute

Language
Workbenches
enable
us
(developers)
to
build
really
expressive
tools
for
business
people
to
work
with
data
effec4vely.

Structure
Nota4on
Guidance
Layout
Views
IDE/Tool
+
Mixed
+
Predefined
*
Clean
-‐
Text
-‐
Custom
1
Powerful

Structure
Nota4on
Guidance
Layout
Views
IDE/Tool
Business
oriented
languages
are
very
different
from
what
we
have
learned
about
languages
for
developers.
LWBs
let
you
build
such
languages.
Let‘s
combines
the
best
of
Languages
and
Form-‐based
Tools.

L
O
B
A
„Language“
inter-‐
preted
liberally
–
new
styles
for
languages.
A
new
Paradigm
for
Applica4ons

L
O
B
A
„Language“
inter-‐
preted
liberally
–
new
styles
for
languages.
A
new
Paradigm
for
Applica4ons
Form
Lang

Language
Form
Expressions
„Code“
Code
CompleTon
Error
HighlighTng
Version
Control
Refactoring
Debugging
Helper
Bu4ons
Tables
Rigid
Structures
Tree
Views
VisualizaTons
Live
InterpretaTon
Math
NotaTon
Graphical
Prose
+
Code

Expressivity
for
Core
Domain
Knowledge
User-‐Friendly
Nota4on
Tes4ng
Meaningful
Analyses
Synthesis
of
SoZware
Build
Language
for
Domain!

Expressivity
for
Core
Domain
Knowledge
User-‐Friendly
Nota4on
Tes4ng
Meaningful
Analyses
Synthesis
of
SoZware
Build
Language
for
Domain!
You‘ve
seen
the
demos.

Expressivity
for
Core
Domain
Knowledge
User-‐Friendly
Nota4on
Tes4ng
Meaningful
Analyses
Synthesis
of
SoZware
Build
Language
for
Domain!
You‘ve
seen
the
demos.
Integrated
DSLs
for
tes4ng.

Expressivity
for
Core
Domain
Knowledge
User-‐Friendly
Nota4on
Tes4ng
Meaningful
Analyses
Synthesis
of
SoZware
Build
Language
for
Domain!
You‘ve
seen
the
demos.
An
integrated
DSL
for
tes4ng.
Types,
Consistency,
Checking

Expressivity
for
Core
Domain
Knowledge
User-‐Friendly
Nota4on
Tes4ng
Meaningful
Analyses
Synthesis
of
SoZware
Build
Language
for
Domain!
You‘ve
seen
the
demos.
An
integrated
DSL
for
tes4ng.
Types,
Consistency,
Checking
Code
Genera4on.

Fundamentally
s4ll
manual,
no
AI.
But
much
beeer
tooling.

Become
Language
Engineering
Experts.

Focus
on
architecture
&
technology,
engineering

LWBs
on
the
Web
Xtext
and
MPS
teams
are
working
on
it
It
will
be
months
to
years
un4l
these
are
finished/
robust.
Other
web-‐LWBs
(prototypes)
exist:
hep://languageworkbenches.net
The
Web

Two
more
more
things
Transac4onal
data
stays
in
databases.

Two
more
more
things
We
don‘t
want
to
replace
the
math
wiz‘
tools.

If
you
have
to
build
a
business
app,
consider
using
an
LWB
as
the
founda4on,
and
recas4ng
the
„applica4on“
as
a
set
of
languages.

Thank you!!
voelter@acm.org
www.voelter.de
@markusvoelter

Introducing Language-Oriented Business Applications - Markus Voelter

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