Web Application Constants Javax.mail

Question

I have a small web application with a MySQL database. The application uses javax.mail and includes these statements:
MyAuthenticator auth = new MyAuthenticator();
Session session = Session.getInstance(props, auth);
And MyAuthenticator returns this:
return new PasswordAuthentication(emailaddress, password);
To avoid hard-coding the emailaddress and password, I have stored them in a MYSQL table and MyAuthenticator queries the table when it is called. Looking back this seems inefficient and maybe off-track.
How do I get constants into a web application efficiently? Can I somehow query the table at the start up of the application and have the constants available as long as the application is running? Is there a completely different approach that I should be thinking about?
Thanks in advance for your help.

Answer 1

That was quite a great idea. Here is what I managed to pieced together, for anyone who wants a solution.
The new Authenticator:
public class MyAuthenticator extends Authenticator {
    private String emailaddress;
    private String password;
    public PasswordAuthentication getPasswordAuthentication() {
        return new PasswordAuthentication(emailaddress, password);
    public String getEmailaddress() {
        return emailaddress;
    public void setEmailaddress(String emailaddress) {
        this.emailaddress = emailaddress;
    public String getPassword() {
        return password;
    public void setPassword(String password) {
        this.password = password;
}Here is the Mailer in ContextBean:
  // Create a mail session
        java.util.Properties props = new java.util.Properties();
        props.put("mail.smtp.host", smtpHost);
        props.put("mail.smtp.auth", "true");
        MyAuthenticator auth = new MyAuthenticator();
        auth.setEmailaddress(emailaddress);
        auth.setPassword(password);
        Session session = Session.getInstance(props, auth);
        // Construct the message here
        Message msg = new MimeMessage(session);
        // recipient can respond using from
        // Send the message
        Transport.send(msg);I really learned a lot and appreciate the responses from everyone.