public class DBFlexWorkflowBean implements javax.ejb.SessionBean {

	private Connection connection;

	private CallableStatement pcGET_ATTRIBUTES;

           public void setSessionContext(javax.ejb.SessionContext ctx) {
		mySessionCtx = ctx;
		openDataBase();
	}
...
            private void openDataBase() {
		if (connection == null || connection.isClosed()) {
		      DataSource dataSource;
		      InitialContext jndiCtx = new InitialContext();
		      dataSource = (DataSource) jndiCtx.lookup("jdbc/wf");
		      connection = dataSource.getConnection();
                            sql = "call DB2ADMIN.GET_ATTRIBUTES( ? )"; 
                            pcGET_ATTRIBUTES = connection.prepareCall(sql); 
                       }  

            }

            public List getAttributes(int id_process) {		
                      pcGET_ATTRIBUTES.setInt( 1 , process);
	           ResultSet rset = pcGET_ATTRIBUTES.executeQuery();
		...
             } 

}