(Final Manuscript, April 15, 2003) © Eric Evans, 2003 4
Declarative Design ..................................................................................................................192
Extending S
PECIFICATIONS
in a Declarative Style ..................................................................193
Carve off Subdomains...................................................................................................................200
Draw on Established Formalisms, When You Can.......................................................................200
Example Integrating the Patterns: Shares Math ............................................................................200
11.
Applying Analysis Patterns........................................................................................................207
12.
Relating Design Patterns to the Model......................................................................................218
S
TRATEGY AKA
P
OLICY
...........................................................................................................219
COMPOSITE ..............................................................................................................................223
Why Not F
LYWEIGHT
?..................................................................................................................229
13.
Bringing the Pieces Together .....................................................................................................230
S t r a t e g ic De s ig n ........................................................ 2 3 3
14.
Maintaining Model Integrity......................................................................................................235
B
OUNDED
C
ONTEXT
................................................................................................................238
C
ONTINUOUS
I
NTEGRATION
.....................................................................................................242
C
ONTEXT
M
AP
.........................................................................................................................244
Relationships Between B
OUNDED
C
ONTEXTS
...............................................................................250
S
HARED
K
ERNEL
......................................................................................................................251
CUSTOMER
/
SUPPLIER DEVELOPMENT TEAMS
............................................................................252
C
ONFORMIST
............................................................................................................................255
ANTICORRUPTION LAYER ........................................................................................................257
S
EPARATE
W
AYS
.....................................................................................................................261
O
PEN
H
OST
S
ERVICE
................................................................................................................263
P
UBLISHED
L
ANGUAGE
............................................................................................................264
Unifying an Elephant ....................................................................................................................266
Choosing Your Model Context Strategy.......................................................................................268
Transformations............................................................................................................................273
Merging C
ONTEXTS
(S
EPARATE
W
AYS
S
HARED
K
ERNEL
) .................................................274
Merging C
ONTEXTS
(S
HARED
K
ERNEL
C
ONTINUOUS
I
NTEGRATION
).................................276
Phasing Out a Legacy System.................................................................................................277
O
PEN
H
OST
S
ERVICE
P
UBLISHED
L
ANGUAGE
.....................................................................278
15.
Distillation....................................................................................................................................279
C
ORE
D
OMAIN
.........................................................................................................................281
GENERIC SUBDOMAINS ............................................................................................................285
D
OMAIN
V
ISION
S
TATEMENT
...................................................................................................290
H
IGHLIGHTED
C
ORE
.................................................................................................................292
C
OHESIVE
M
ECHANISMS
..........................................................................................................295
Distilling to a Declarative Style ..............................................................................................297
S
EGREGATED
C
ORE
..................................................................................................................298
A
BSTRACT
C
ORE
......................................................................................................................305
Deep Models Distill ......................................................................................................................306
Choosing Refactoring Targets.......................................................................................................306
16.
Large-Scale Structure.................................................................................................................307
E
VOLVING
O
RDER
....................................................................................................................310
S
YSTEM
M
ETAPHOR
.................................................................................................................312
R
ESPONSIBILITY
L
AYERS
.........................................................................................................314
K
NOWLEDGE
L
EVEL
................................................................................................................326
P
LUGGABLE
C
OMPONENT
F
RAMEWORK
..................................................................................333
How Restrictive Should a Structure Be?.......................................................................................336
Refactoring Toward a Fitting Structure ........................................................................................337
17.
Bringing the Strategy Together .................................................................................................339
Bringing Together Large-Scale Structures and B
OUNDED
C
ONTEXTS
..........................................339
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