persisting a domain object

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persisting a domain object

persisting a domain object

2005-02-09 - By Robert Taylor

Back
Greetings,

I was just curious which method of the 2 listed below is most used for
managing persistence for domain objects:

1. ActiveRecord:
http://www.martinfowler.com/eaaCatalog/activeRecord.html

Example:
Person p = new Person();
p.setName("Mr. Person");
p.store();

Person p = Person.getPerson(personId);

p.setName("Mr. Parson");
p.store();

Person would use a Data Access Object to assist in persisting and accessing
state.

2. Separate Domain Object, Data Access Object, Manager Object
The Domain Object is a JavaBean presenting a domain entity like Person,
Address, Item.
The Data Access Object is responsible for mapping that Domain Object
The Domain Manager Object is a proxy for the Data Access Object providing
uniform
functionality across possible multiple Data Access Object implementations

Example:
Person p = new Person();
p.setName("Mr. Person");
PersonManager pm = // get PersonManager
pm.store(p);

Person p = pm.getPerson(personId);
p.setName("Mr. Parson");
pm.store(p);

PersonManager uses a Data Access Object to assist in persisting and
accessing state
for the Person.

/robert

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<body lang=EN-US link=blue vlink=purple>

<div class=Section1>

Greetings, <o:p></o:p>

<o:p> </o:p>

I was just curious which method of
the 2 listed below is most used for managing persistence for domain objects:<o
:p></o:p>

<o:p> </o:p>

<ol style='margin-top:0in' start=1 type=1>
<li class=MsoNormal style='margin-bottom:12.0pt;mso-list:l1 level1 lfo3'>ActiveRecord:
 
<a href="http://www.martinfowler.com/eaaCatalog/activeRecord.html">http:/
/www.martinfowler.com/eaaCatalog/activeRecord.html</a> 
 
Example: 
Person p = new Person(); 
p.setName(“Mr. Person”); 
p.store(); 
 
Person p = Person.getPerson(personId); 
 
p.setName(“Mr. Parson”); 
p.store(); 
 
Person would use a Data Access Object to assist in persisting and
accessing state. 
 
 
 
<o:p></o:p></li>
<li class=MsoNormal style='mso-list:l1 level1 lfo3'>
Separate Domain Object, Data
Access Object, Manager Object 
The Domain Object is a JavaBean presenting a domain entity like Person,
Address, Item. 
The Data Access Object is responsible for mapping that Domain Object 
The Domain Manager Object is a proxy for the Data Access Object providing
uniform 
functionality across possible multiple Data Access Object implementations
 
 
Example: 
Person p = new Person(); 
p.setName(“Mr. Person”); 
PersonManager pm = // get PersonManager 
pm.store(p); 
 
Person p = pm.getPerson(personId); 
p.setName(“Mr. Parson”); 
pm.store(p);<o:p></o:p></li>
</ol>

<o:p> </o:p>

PersonManager uses a Data Access
Object to assist in persisting and accessing state 
for the Person.<o:p></o:p>

<o:p> </o:p>

<o:p> </o:p>

<o:p> </o:p>

/robert<o:p></o:p>

<o:p> </o:p>

<o:p> </o:p>

<o:p> </o:p>

</div>

</body>

</html>
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To unsubscribe, send email to listserv@(protected) and include in the body
of the message "signoff J2EE-INTEREST". For general help, send email to
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