WLS 10.3 ClassCastException obtaining JDBC connection

Question

I have a problem obtaining a JDBC connection in a java client application, using a WLS Datasource.
- I've configured a JDBC datasource in a WLS 10.3 instance, using the Oracle thin driver (not the XA version) - and have successfully targetted this to my server and tested the connection via the console.
- When viewing the JNDI Tree for the server, the Datasource is visible as expected.
However, when I attempt to use a simple client program to obtain a datasource and JDBC connection I get the following error :
java.lang.ClassCastException : weblogic.jdbc.common.internal.ConnectionEnv cannot be cast to java.io.Serializable
Debugging shows a datasource is obtained and that the ClassCastException is thrown when an attempt is made to get a connection from the datasource. Note this code has been used successfully for previous WLS versions to obtain and test a connection (WLS 8.1 - WLS 10) and follows the expected steps :
Hashtable<String, String> ht = new Hashtable<String, String>();
ht.put( Context.INITIAL_CONTEXT_FACTORY, "weblogic.jndi.WLInitialContextFactory" );
ht.put( Context.PROVIDER_URL, "t3://localhost:7001");
javax.naming.Context ctx = new InitialContext( ht );
ds = (javax.sql.DataSource) ctx.lookup( pDataSourceName );
Connection con = ds.getConnection();
The client app has the following Jars on the classpath :
wlclient.jar
jdk1.6.0_07 runtime jar
The client code has been built using jdk1.6.0_07
i) Can you confirm if any additional libraries are required on the classpath
ii) Please indicate if there are any special steps required to obtain a JDBC connection in WLS 10.3
Thanks for your help.
Edited by: user554713 on 23-Dec-2008 02:27

Answer 1

In a Java client the HashTable properties are required to be set.
Context ctx = null; 
Hashtable ht = new Hashtable();
ht.put(Context.INITIAL_CONTEXT_FACTORY,        
"weblogic.jndi.WLInitialContextFactory"); 
ht.put(Context.PROVIDER_URL,         "t3://localhost:7001"); 
try {    ctx = new InitialContext(ht);   
// Use the context in your program  } 
catch (NamingException e) {    // a failure occurred  }
finally {    try {ctx.close();}    catch (Exception e)
{      // a failure occurred    }  }Edited by: dvohra16 on Dec 10, 2009 5:39 PM