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Re: NPE - java.lang.reflect.UndeclaredThrowableException

From: <forums_at_java.net>
Date: Thu, 2 Feb 2012 07:39:32 -0600 (CST)

I saw the JDBCSampleActivator.java example. I edited my code:

<code>

package org.DX_57.osgi.SH_27.impl;
import javax.sql.DataSource;
import java.sql.SQLException;
import java.util.Properties;
import org.DX_57.osgi.SH_27.api.SessionHandle;
import org.osgi.framework.BundleActivator;
import org.osgi.framework.BundleContext;
import org.osgi.framework.Constants;
import org.osgi.framework.Filter;
import org.osgi.framework.ServiceReference;
import org.osgi.util.tracker.ServiceTracker;
public class SessionHandleApp implements BundleActivator {
   
    private static final String DSNAME = "jdbc/Oracle";
    private ServiceTracker st;
   
    @Override
    public void start(BundleContext bc) throws Exception {
        bc.registerService(SessionHandle.class.getName(), new
SessionHandleImpl(), new Properties());
       
        Filter filter = bc.createFilter("(&" + "(" +
Constants.OBJECTCLASS
                + "=" + DataSource.class.getName() + ")" +
"(jndi-name="
                + DSNAME + ")" + ")");
        st = new ServiceTracker(bc, filter, null) {
            @Override
            public Object addingService(ServiceReference reference)
{
                DataSource ds = (DataSource)
context.getService(reference);
                try {
                    ds.getConnection().toString();
                } catch (SQLException e) {
                }
                return super.addingService(reference);
            }
            @Override
            public void removedService(ServiceReference reference,
                    Object service) {
                super.removedService(reference, service);
            }
        };
        st.open();       
       
    }
    public void stop(BundleContext bc) throws Exception {
       
bc.ungetService(bc.getServiceReference(SessionHandle.class.getName()));
        st.close();
    }
}
 

</code>

For now it still don't work because JNDI is used for datasource and
I haven't configured it yet. Is it possible to configure the activator to
search for JDBC Resource instead JNDI resource?

How I must configure the above example to do this?

Best wishes

Peter

 


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