RE: [Shale] When to create a database Connection?

[James Reynolds]

Never mind, I mis-spelled the bean name in the Faces-Config. Oh the
shame :(

-----Original Message-----
From: James Reynolds [mailto:[EMAIL PROTECTED] 
Sent: Wednesday, March 29, 2006 10:33 AM
To: Struts Users Mailing List
Subject: [Shale] When to create a database Connection?


I'm getting a null pointer error in my backing bean.  My grand plan was
to create a Connection in the init() method extended from the
AbstractViewController, so it can be used by any number of methods and
getters in my bean, and then close it in destroy().

In this simple case, the only place this Connection is used is in a
getter that returns a Result for a dataTable.  However, it doesn't seem
to be working as I get a null pointer exception.  If I move the
getConnection() method out of the init() method and into this getter,
then everything works great.

Am I miss-using the init() method?


Import lots.of.stuff;

public class Testimonial extends AbstractViewController {
    private Connection conn = null;

    public Testimonial(){
    }

    public void init() {
        try {
            conn = DbConnection.getConnection();
            System.out.println();
        } catch (SQLException e) {
            e.printStackTrace();
        }
    }

    public void destroy() {
        try {
            if (!conn.isClosed()) {
                conn.close();
            }
        } catch (SQLException sqle) {
            log(sqle.getMessage(), sqle);
            sqle.printStackTrace();
        }
    }

    public Result getAllTestimonials() {
        /* ### moving the "conn = DbConnection.getConnection()" here
solves the problem ### */
        Result result = null;
        PreparedStatement ps = null;
        try {
            ps = conn.prepareStatement(SqlStatements.ALL_TESITIMONIALS);
            result = ResultSupport.toResult(ps.executeQuery());
        } catch (SQLException sqle) {
            System.out.println("SQL Exception:" + sqle.getMessage());
            sqle.printStackTrace();
        } catch (Exception e) {
            System.out.println("Exception:" + e.getMessage());
            e.printStackTrace();
        } finally {
            try {
                if (ps != null) {
                    ps.close();
                }
            } catch (SQLException e) {
                e.printStackTrace();
            }
        }
        return result;
    }
}


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