RE: Best Practice Question.

[Ajay Chitre]

Hello,

Here's how I pass around Configuration properties in my Struts application.
 Certainly this isn't the best practise, but just an idea;

I have created a Singleton class called 'PropertyRetriever' which is simillar
to the "Service Locator" design pattern.  It uses Digester to read configuration
properties from a XML file.

Here's what it looks like;

public class PropertyRetriever {

    // Singleton's private instance
    private static PropertyRetriever me;

    private static Digester digester = null;
    private static AppRoot root = null;

    static {
        try {
            me = new PropertyRetriever();
        } catch (Exception ex) {
            //throw new PropertyRetrieverException();
        }
    }

    private PropertyRetriever() throws Exception {  //private construtor
to avoid instantiation
        getProperties();
    }

    // Returns PropertyRetriever instance
    static public PropertyRetriever getInstance() {
        return me;
    }

    private void getProperties() throws Exception {

        // Configure digester
        digester = new Digester();

etc etc.


Now from my Action Classes in Struts, I can get any property as follows;

        PropertyRetriever propertyRetriever = PropertyRetriever.getInstance();
        String appName = propertyRetriever.getAppRoot().getAppName();


I am sure there are pros & cons of this approach.

HTH!

>-- Original Message --
>Reply-To: "Struts Users Mailing List" <[EMAIL PROTECTED]>
>From: "Phase Web and Multimedia" <[EMAIL PROTECTED]>
>To: "Struts User List" <[EMAIL PROTECTED]>
>Subject: Best Practice Question.
>Date: Tue, 30 Apr 2002 11:50:30 -0600
>
>
>I have a bean that is created when my app starts and it contains some
>database table conifguration info (I'll call it my config bean). Later
on
>in
>an Action class another bean, that I'll call my logic bean, needs to access
>the values of the config bean. Would it be proper to use the Action class
>to
>pass the config bean to the logic bean and let the logic bean extract the
>values or should I extract all the values from the config bean within the
>Action class and pass the config info in a different manner.
>
>Thanks,
>Brandon Goodin
>Phase Web and Multimedia
>P (406) 862-2245
>F (406) 862-0354
>[EMAIL PROTECTED]
>http://www.phase.ws
>
>
>
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>To unsubscribe, e-mail:   <mailto:[EMAIL PROTECTED]>
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>

Ajay Chitre

Diligent Team, Inc.
(Where Diligent People Work as a Team)

http://www.DiligentTeam.com


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