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ResultSet in Weblogic server

Hi,
I have been trying to make a EJB Session bean (using WebGain StudioPro 4.1) that retrieves a ResultSet from a MSSQL database and process the data. Everything seams to go OK until I try to perform any operation on the ResultSet I get back from the database.

For example the code below works fine for creating a table in the database:

Statement stmt = dbConnection.createStatement();
stmt.executeUpdate("CREATE TABLE TEST (TEST1 INTEGER, TEST2 VARCHAR(32))");
stmt.executeUpdate("INSERT INTO TEST VALUES (1,'RAD 1')");
stmt.executeUpdate("INSERT INTO TEST VALUES (2,'RAD 2')");
stmt.executeUpdate("INSERT INTO TEST VALUES (3,'RAD 3')");

But if I try to get a ResultSet and call for example first() or absolute(1) the WebLogic server (5.1) crashes. Example code that makes it crash is:

ResultSet rs = stmt.executeQuery("SELECT TEST2 FROM TEST");
rs.first();
 
Anybody experienced anything like this and may help me work around this problem?
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Krafer
Asked:
Krafer
1 Solution
 
NushiCommented:
try to change this line:
Statement stmt = dbConnection.createStatement();
PrepareStatment stmt = dbConnection.PrepareStatement(String...);

ResaultSet rs=stmt.getResaultSet();

and see whats happened.


Nushi.
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KraferAuthor Commented:
Thanks for the comment but it still crashes. The exception and error message I get is:

java.rmi.RemoteException:
java.lang.AbstractMethodError
   at weblogic.jdbc20.pool.ResultSet.first(ResultSet.java:101)
   at weblogic.jdbc20.rmi.internal.ResultSetImpl.first(ResultSetImpl.java:521)
   at weblogic.jdbc20.rmi.SerialResultSet.first(SerialResultSet.java:793)
   at com.telenor.mhp.contentlog.ContentLogEJB.getDBConnection(ContentLogEJB.java:135)
   at com.telenor.mhp.contentlog.ContentLogEJBEOImpl.getDBConnection(ContentLogEJBEOImpl.java:104)
   at com.telenor.mhp.contentlog.ContentLogEJBEOImpl_WLSkel.invoke(ContentLogEJBEOImpl_WLSkel.java:83)
   at weblogic.rmi.extensions.BasicServerObjectAdapter.invoke(BasicServerObjectAdapter.java:347)
   at weblogic.rmi.extensions.BasicRequestHandler.handleRequest(BasicRequestHandler.java:77)
   at weblogic.rmi.internal.BasicExecuteRequest.execute(BasicExecuteRequest.java:15)
   at weblogic.kernel.ExecuteThread.run(ExecuteThread.java:129)
; nested exception is:

Anybody make any sense og this?
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Prasanna_HebbarCommented:
The implementation for this method is not supported by WebLogic. The version of weblogic which you have does not have the support for JDBC2.0. That is why it gives the error AbstractMethodError.

So you have to use only rset.next() to navigate through the result set. (If you need the support of navigating back to the first one, you might want to store the objects in vector).

Refer to the api documentation of next(). That might be enough for you.
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sghosh092199Commented:
Hi!

You can try the following:

PrepareStatment stmt = dbConnection.PrepareStatement("SELECT ..");

ResultSet rs=stmt.executeQuery();

The AbstractMethodError occurs if there is an incompatibility between the calling method and the called method at runtime. Say,

you have a method abc(String str1, String str2). You call it as abc(int). Now it is always caught at compile time but consider the fact that you compile calling method, change the method signature and compile called method without compiling the former.

Since the error is occurring in the built-in functions, check there is a version compatibility. The first() method applies for JDBC 2.0

Hope that helps!



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KraferAuthor Commented:
Thank you very much. The solution is not always difficult :-)
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