modeling{
from :domain_driven_design
to :internal_dsls?
}
#Phillip Calçado
#http://fragmental.tw
#pcalcado@gmail.com

Turing Complete

Business
An User
belongs to a group.
He must authenticate
using a login.
Dev
class User
attr_reader :login, :group
def authenticate(login)
#do stuff
end
end

Application User pays Bill from his Group
Domain
User, Group, Bill...
Model
Language class, module, def...
10010101001100101010101010101
11010111010001000001111100000

SELECT
u.name, g.name
FROM
(SELECT p.name
FROM USER u, PEOPLE p
WHERE u.status=’published’
AND u.id = p.id) u,
GROUP g
WHERE
g.id = u.group_id
AND
g.type = ‘ADMIN’

Application User pays Bill from his Group
Domain
User, Group, Bill...
Model
Language class, module, def...
10010101001100101010101010101
11010111010001000001111100000

Application User pays Bill from his Group
Domain
User, Group, Bill...
Language
10010101001100101010101010101
11010111010001000001111100000

Business
An User
belongs to a group.
He must authenticate
using a login.
Dev
authenticate ‘phill’

External DSLs

External DSLs

Internal DSLs

Person
name
birth_date
User
Customer login * 1 Group
password
authenticate

['20080102', '18:23:06,026'] - (INFO \"Program started\")
['20080102', '18:23:07,027'] - (DEBUG \"Infra-check\")
['20080102', '18:23:08,028'] - (INFO \"Checking classloaders\")
['20080102', '18:23:09,029'] - (WARN \"Classloader not set properly\")
['20080102', '18:23:10,030'] - (ERROR <<TEXT
Could not load the org.jboss.webservice.server.Service interceptor
java.lang.ClassNotFoundException: No ClassLoaders found for:
org.jboss.webservice.server.ServiceEndpointInterceptor
at org.jboss.mx.loading(LoadMgr3.java:212)
at org.jboss.mx.loading(RepositoryClassLoader.java:490)
at org.jboss.mx.loading(RepositoryClassLoader.java:392)
at java.lang.ClassLoader.loadClass(ClassLoader.java:235)
at org.jboss.util.loading.(DelegatingClassLoader.java:89)
at org.jboss.mx.loadClass(LoaderRepositoryClassLoader.java:90)
at java.lang.ClassLoader.loadClass(ClassLoader.java:235)
TEXT
)
['20080102', '18:23:09,029'] - (INFO \"Program finished\")

@log << LogEntry.new(Time.mktime(2008,01,02,18,23,06,26), :info,
\"Program started\")
@log << LogEntry.new(Time.mktime(2008,01,02,18,23,06,27), :debug,
\"Infra-check\")
@log << LogEntry.new(Time.mktime(2008,01,02,18,23,06,26), :info,
\"Checking classloaders\")
@log << LogEntry.new(Time.mktime(2008,01,02,18,23,06,28), :warn,
\"Classloader not set properly\" )
@log << LogEntry.new(Time.mktime(2008,01,02,18,23,06,29), :error,
\"Could not load the org.jboss.webservice.server.Service interceptor
\\njava.lang.ClassNotFoundException: No ClassLoaders found for:
org.jboss.webservice.server.ServiceEndpointInterceptor\\n at
org.jboss.mx.loading(LoadMgr3.java:212)\\n at
org.jboss.mx.loading(RepositoryClassLoader.java:490)\\n\\nat
org.jboss.mx.loading(RepositoryClassLoader.java:392)\\nat
java.lang.ClassLoader.loadClass(ClassLoader.java:235)\\nat
org.jboss.util.loading.(DelegatingClassLoader.java:89)\\nat
org.jboss.mx.loadClass(LoaderRepositoryClassLoader.java:90)\\nat
java.lang.ClassLoader.loadClass(ClassLoader.java:235)\")
@log << LogEntry.new(Time.mktime(2008,01,02,18,23,06,30), :info,
\"Program finished\")

#eof