jar stops during execution

[Gijs van Wieringen]

Hi,

I'm trying to make a RSS parser that parses some RSS document and sends the filtered output elsewhere via mail/screen popup/etc. All is working well, until I compile it into a jar and run the jar.
The jar just seems to stops during execution when trying to creata a new instance GMailMailer. I have put some log messages in place to see what's going on.

public final class MailerFactory
{
    public static Mailer createMailer(MailSettings settings)
    {
        if(settings.getUsername().toLowerCase().contains("@gmail"))
        {
            Logger.getGlobal().log(Level.INFO,"Using new instance of GmailMailer");
            return new GMailMailer(settings);
        }
        else
        {
            Logger.getGlobal().log(Level.INFO,"Using default mailer");
            return new Mailer(settings);
        }
    }
}

The last log entry I see when running the jar is: 'Using new instance of GmailMailer". When I run the same code via IntelliJ IDE, then all is fine and I can see the log messages that come after it. The GmailMailer class is nothing spectacular

public class GMailMailer extends Mailer
{
    private MailSettings settings;

    public GMailMailer(MailSettings settings)
    {
        Logger.getGlobal().log(Level.INFO,"Entering GMailMailer constructor");
        Logger.getGlobal().log(Level.INFO,"Set from address to "+settings.getUsername());
        setFromAddress(settings.getUsername());
        Logger.getGlobal().log(Level.INFO,"Set recipient to"+settings.getDestinationAddress());
        setRecipients(settings.getDestinationAddress());
        Logger.getGlobal().log(Level.INFO,"Set smtp server to "+settings.getStmpAddress());
        setSMTPServer(settings.getStmpAddress());

        this.settings = settings;
        Logger.getGlobal().log(Level.INFO,"Using GmailMailer");
    }
... etc

When running the jar, I don't see "Entering GMailMailer constructor" in the log, but I do see it when running from IntelliJ 11. Both classes are in the same package. Now I have run out of ideas.. Why is this happening? All help is welcome...

[Rob Spoor]

Run your JAR file from a command line, using java -jar <your_jar_file>. This will display all errors and exceptions that occur. My guess is that you have a class path issue, which you can solve by putting a Class-Path entry in your manifest file.

[Gijs van Wieringen]

Thank you for your reply. The problem was indeed caused by a class path issue. The GMailMailer class had a dependency on a class in an external jar

In the end I fixed it by:
IntelliJ (11)-> 'Project Structure->Artifacts->'Create Jar from Modules'
Select option '<All Modules>' and select Main Class.
In the 'Jar files from libraries' section I select he option 'Copy to output directory and link via manifest'.