hello:

I have a code in Java, using a mysql connection. While I used it as an standalone, it was ok, as usual, create the connection:

Class.forName(Variables.SQL_DRIVER).newInstance();
connector = DriverManager.getConnection("jdbc:mysql://" + url + "?user=" + usr + "&password=" + pass);

but now I've translated it into a web service, using this library "GLUE", and I get the following error:

electric.util.WrappedException: java.rmi.UnmarshalException: java.io.IOException
: no argument constructor is missing. java.lang.InstantiationException: com.mysql.jdbc.Connection
at electric.proxy.handler.Proxy.getCompatibleException(Unknown Source)
at electric.proxy.handler.Proxy.invoke(Unknown Source)
at $Proxy0.getLoginAuthenticationService(Unknown Source)
at Test.main(Test.java:27)

It sounds funny to me because Connection is an Interface... how come it wants to become "instantiated", is there a way around?

Thanks a lot.

Poeta.

Drop a visit to my site?

I don't know the library you talk about, but from what I see in the exception, this library executes code through Java RMI (with RMI you can call methods of an object on a different machine). You can do this also for objects created from classes that are not in the classpath on 'your machine'. But this means that RMI must marshal/unmarshal classes over the network.

I don't remember right now the details, but in your stack trace RMI is complaining.

Maybe if you would explained a little what you clasess/methods are, and how are you calling them, somebody could help more.

hello:

I was trying to encapsulate database access in a web service.... I recently (1 hour ago) solved it by ... err.... forcing "no connection instantiation" haha well I just declared the thing static and it worked..... not what I'd like, or an example of good patterns but hey it worked.

Thanks a lot!

Poeta