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Re: Java EE Architecture

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16.10.2013 13:55, lipska the kat kirjoitti:
> On 16/10/13 11:42, Donkey Hottie wrote:
>> 16.10.2013 11:45, 1connu kirjoitti:
>>> lipska the kat a écrit :
>>>> On 09/10/13 21:41, art.marole@gmail.com wrote:
>>>>> Hi all,
>>>>>
>>>>> I would like to prepare typical Java EE solution (EJB, JSF, JPA) now,
>>>>> and I have quite stupid problem related with domain objects. I want
>>>>> to create Person class as persistence class, but I don't know in
>>>>> which module I shoud put this class: Business Layer (ejb module) or
>>>>> in Integration Layer (jar module).
>>>>>
>>>>> Person class is more related with logic, so I should put it in ejb
>>>>> module, but in this case I will need to create dependency relation
>>>>> from Integration Layer to Business Layer as Integration Layer need to
>>>>> know what object should store in DB (ex. void store(Person
>>>>> object){};).
>>>>> Put Person class in Integration Layer will remove this unwanted
>>>>> dependency, but I feel that Person class is more Business class then
>>>>> Integration class.
>>>>>
>>>>> What do you think about it?
>>>>
>>>>
>>>> A Person class ... A PERSON class., please, please, *please* don't
>>>> have a Person class
>>>>
>>>> For the sake of whatever omnipotent deity you pray to, do not have a
>>>> Person class
>>>>
>>>> *People* do not belong in a computer system.
>>>>
>>>> Why?
>>>>
>>>> Because it's a poor abstraction.
>>>>
>>>> How are you going to model consciousness, sentience, the 'mind', the
>>>> 'soul'? let alone arms legs, eyes and teeth :-)
>>>>
>>>> You *do not need* a Person class.
>>>>
>>>> Let's put it another way
>>>>
>>>> The very fact that you are having problems deciding where your Person
>>>> belongs should alert you to the fact that it is a poor abstraction.
>>>>
>>>> Try Account, or Record, or if you absolutely *must* User but not
>>>> Person, you will end up regretting it.
>>>>
>>>> lipska
>>>>
>>>>
>>> Why not ?
>>> You can have an abstract class Person with minimum field (name, date
>>> birth) and sub class depending of role of theses persons (ex User
>>> (login/password) ) in your model.
>>
>> I see no problem with Person.
>>
>> I have interface IPerson, and implementations Person and ExternalPerson.
>> I'm a lead programmer on an Identity Management solution.
> 
> You *cannot* be serious ... IPerson groan :-(
> 
> If you are developing an Identity Management system surely Identity
> might be a better abstraction ... just a thought.
> 
> 
> 
> 

We are managing the personnel of a company. A manager manager persons,
not identities.

A computer system is not supposed to model the liver or a soul of a
Person, but abstracts the properties that are relevant to the task.

A Person has a manager. An Identity does not.

-- 

Your society will be sought by people of taste and refinement.

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Java EE Architecture art.marole@gmail.com - 2013-10-09 13:41 -0700
  Re: Java EE Architecture Lew <lewbloch@gmail.com> - 2013-10-09 14:45 -0700
    Re: Java EE Architecture Arne Vajhøj <arne@vajhoej.dk> - 2013-10-09 22:00 -0400
  Re: Java EE Architecture Arne Vajhøj <arne@vajhoej.dk> - 2013-10-09 22:18 -0400
    Re: Java EE Architecture art.marole@gmail.com - 2013-10-10 00:47 -0700
      Re: Java EE Architecture Arne Vajhøj <arne@vajhoej.dk> - 2013-10-16 20:37 -0400
  Re: Java EE Architecture lipska the kat <"nospam at neversurrender dot co dot uk"> - 2013-10-10 13:26 +0100
    Re: Java EE Architecture 1connu <1connu999@gmail.com> - 2013-10-16 10:45 +0200
      Re: Java EE Architecture Donkey Hottie <donkey@fredriksson.dy.fi> - 2013-10-16 13:42 +0300
        Re: Java EE Architecture lipska the kat <"nospam at neversurrender dot co dot uk"> - 2013-10-16 11:55 +0100
          Re: Java EE Architecture Donkey Hottie <donkey@fredriksson.dy.fi> - 2013-10-16 14:18 +0300
          Re: Java EE Architecture Donkey Hottie <donkey@fredriksson.dy.fi> - 2013-10-16 14:25 +0300
            Re: Java EE Architecture lipska the kat <"nospam at neversurrender dot co dot uk"> - 2013-10-16 14:23 +0100
              Re: Java EE Architecture Donkey Hottie <donkey@fredriksson.dy.fi> - 2013-10-16 17:10 +0300
                Re: Java EE Architecture lipska the kat <"nospam at neversurrender dot co dot uk"> - 2013-10-16 16:44 +0100
                Re: Java EE Architecture "L." <carisio@gmail.com> - 2013-10-16 10:15 -0700
                Re: Java EE Architecture lipska the kat <"nospam at neversurrender dot co dot uk"> - 2013-10-16 19:01 +0100
                Re: Java EE Architecture "L." <carisio@gmail.com> - 2013-10-16 12:17 -0700
                Re: Java EE Architecture Martin Gregorie <martin@address-in-sig.invalid> - 2013-10-16 21:01 +0000
                Re: Java EE Architecture Arne Vajhøj <arne@vajhoej.dk> - 2013-10-16 20:40 -0400
                Re: Java EE Architecture Donkey Hottie <donkey@fredriksson.dy.fi> - 2013-10-17 00:00 +0300
              Re: Java EE Architecture Wayne <nospam@all.invalid> - 2013-10-16 23:08 -0400
                Re: Java EE Architecture Donkey Hottie <donkey@fredriksson.dy.fi> - 2013-10-19 17:05 +0300
                Re: Java EE Architecture Lew <lewbloch@gmail.com> - 2013-10-19 14:48 -0700
                Re: Java EE Architecture lipska the kat <"nospam at neversurrender dot co dot uk"> - 2013-10-20 09:00 +0100
                Re: Java EE Architecture "Qu0ll" <Qu0llSixFour@gmail.com> - 2013-10-20 19:40 +1100
                Re: Java EE Architecture lipska the kat <"nospam at neversurrender dot co dot uk"> - 2013-10-20 10:07 +0100
          Re: Java EE Architecture Arved Sandstrom <asandstrom2@eastlink.ca> - 2013-12-16 20:14 -0400
            Re: Java EE Architecture lipska the kat <"lipskathekat at yahoo dot co dot uk"> - 2013-12-17 08:47 +0000
        Re: Java EE Architecture Jeff Higgins <jeff@invalid.invalid> - 2013-10-16 20:19 -0400
          Re: Java EE Architecture Jeff Higgins <jeff@invalid.invalid> - 2013-10-16 21:24 -0400
      Re: Java EE Architecture lipska the kat <"nospam at neversurrender dot co dot uk"> - 2013-10-16 11:49 +0100
        Re: Java EE Architecture "Qu0ll" <Qu0llSixFour@gmail.com> - 2013-10-16 22:24 +1100
          Re: Java EE Architecture lipska the kat <"nospam at neversurrender dot co dot uk"> - 2013-10-16 13:39 +0100
            Re: Java EE Architecture Arne Vajhøj <arne@vajhoej.dk> - 2013-10-16 20:39 -0400
              Re: Java EE Architecture "Qu0ll" <Qu0llSixFour@gmail.com> - 2013-10-17 13:43 +1100
              Re: Java EE Architecture Jeff Higgins <jeff@invalid.invalid> - 2013-10-16 23:22 -0400
                Re: Java EE Architecture lipska the kat <"nospam at neversurrender dot co dot uk"> - 2013-10-17 08:53 +0100
              Re: Java EE Architecture lipska the kat <"nospam at neversurrender dot co dot uk"> - 2013-10-17 08:57 +0100
                Re: Java EE Architecture "Qu0ll" <Qu0llSixFour@gmail.com> - 2013-10-17 19:31 +1100
                Re: Java EE Architecture lipska the kat <"nospam at neversurrender dot co dot uk"> - 2013-10-17 09:56 +0100
                Re: Java EE Architecture "Qu0ll" <Qu0llSixFour@gmail.com> - 2013-10-17 20:18 +1100
                Re: Java EE Architecture lipska the kat <"nospam at neversurrender dot co dot uk"> - 2013-10-17 10:56 +0100
                Re: Java EE Architecture "Qu0ll" <Qu0llSixFour@gmail.com> - 2013-10-17 21:39 +1100
                Re: Java EE Architecture lipska the kat <"nospam at neversurrender dot co dot uk"> - 2013-10-17 12:08 +0100
                Class Person [was: Java EE Architecture] "Chris Uppal" <chris.uppal@metagnostic.REMOVE-THIS.org> - 2013-10-18 08:19 +0100
                Re: Java EE Architecture Arne Vajhøj <arne@vajhoej.dk> - 2013-10-17 21:00 -0400
                Re: Java EE Architecture Arne Vajhøj <arne@vajhoej.dk> - 2013-10-17 21:02 -0400
                Re: Java EE Architecture lipska the kat <"nospam at neversurrender dot co dot uk"> - 2013-10-18 09:06 +0100
                Re: Java EE Architecture lipska the kat <"nospam at neversurrender dot co dot uk"> - 2013-10-18 09:04 +0100
                Re: Java EE Architecture Arne Vajhøj <arne@vajhoej.dk> - 2013-10-19 22:43 -0400
                Re: Java EE Architecture lipska the kat <"nospam at neversurrender dot co dot uk"> - 2013-10-20 09:05 +0100
                Re: Java EE Architecture Arne Vajhøj <arne@vajhoej.dk> - 2013-10-20 09:24 -0400
      Re: Java EE Architecture Arne Vajhøj <arne@vajhoej.dk> - 2013-10-16 20:43 -0400

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