Design issue to Create Object in Java

Question

I am developing an application in which subscriber send SMS to get any package.

In my program, when I received user request, I have to create Subscriber object. To initialize subscriber object, I have to query back-end database and IN node then set attributes of subscriber object.

Please suggest for this, should I use Factory pattern or Builder? or any good alternative? whats suggestions for putting my code for querying database and calling XMLRPC in Factory class?

My class look like following

public class Subscriber {

private String subno;
private String subPackageType;
private String subTariff;
private String subRequest;
private boolean isTransferable;
}

Now subno,subRequest i got from sms, subPackageType from database and subTariff from IN node by sending XMLRPC command.

I have more attributes as well but i just mention some to provide concept.

Regards,
imran

Is there more then one type of subscriber? Are there different types of requests? Tell us more about your initial design. — Eduard
– Eduard, Commented Feb 22, 2011 at 7:43
It would be difficult for you supply enough information for us to make an informed judgement. Why don't you try out the different alternatives and make up your own mind which is best? — Stephen C
– Stephen C, Commented Feb 22, 2011 at 7:57

jwenting · Accepted Answer · 2011-02-22 07:59:20Z

7

Stop thinking "which pattern should I use" as if any application exists of a single pattern and that's it, that just applying a specific pattern will mysteriously fix the world.

Start writing, and a pattern will emerge. Eventually, with experience, that will become second nature. Don't try to force things into a pattern, let it grow and mature.

answered Feb 22, 2011 at 7:59

jwenting

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Comments

AlexR · Accepted Answer · 2011-02-22 07:56:31Z

1

First using factory is a good practice anyway. Second in your case I think that you should retrieve the data from DB and then create the Subscriber object. In this case you actually pass the data from DB to the subscriber object during creation. If for some other reason you cannot do it just make Subscriber to be a bean, i.e. provide appropriate setters. In this case you can create object, then query DB and then set all needed properties by calling appropriate setter.

It seems that Builder pattern could not help you too much here.

answered Feb 22, 2011 at 7:56

AlexR

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2 Comments

ImranRazaKhan Over a year ago

If i understand you correctly i will call SubscriberFactory.createSubscriber and my code for querying DB and IN node over XMLRPC will be in factory class.

ImranRazaKhan Over a year ago

what you suggest for putting DB and XMLRPc code in factory class?

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