Problem when getting resultset when using connection pooling in weblogic

Question

Hello,
I am new to database connection pooling. I am using weblogic server, Java 1.6, MySql database. I have done connection pooling in weblogic server. The problem arise when I try to run select query I cannot fetch data in ResultSet. For insert it works fine...
import java.io.Serializable;
import java.sql.Connection;
import java.sql.ResultSet;
import java.sql.Statement;
import java.util.ArrayList;
import java.util.List;
import java.util.Properties;
import javax.naming.Context;
import javax.naming.InitialContext;
import javax.sql.DataSource;
public class DatabaseToText implements Serializable {
public DatabaseToText() {
super();
// TODO Auto-generated constructor stub
public static void main(String[] args) {
Connection conn;
Statement stmt;
ResultSet rs;
String str1, str2;
List l1 = new ArrayList();
try {
System.out.println("in try block");
Properties prop = new Properties();
prop.put(Context.INITIAL_CONTEXT_FACTORY, "weblogic.jndi.WLInitialContextFactory");
prop.put(Context.PROVIDER_URL, "t3://localhost:7001");
System.out.println("properties are set ");
Context ctx = new InitialContext(prop);
System.out.println("b4 lookup(mysqljndi)");
Object obj = ctx.lookup("mysqljndi"); // java:comp/env/CPDS
System.out.println("afta lookup(mysqljndi)");
DataSource ds = (DataSource) obj;
conn = ds.getConnection();
stmt = conn.createStatement();
String query = "select * from logindb.userregister";
System.out.println("query is = " + query);
rs = stmt.executeQuery(query);
System.out.println("size of rs is :: " + rs.getFetchSize());
if (rs != null) {
while (rs.next()) {
str1 = rs.getString(0);
str2 = rs.getString(1);
System.out.println("username is :: " + str1 + "password is : " + str2);
} else {
System.out.println("no values get fetched");
ctx.close();
} catch (Exception e) {
e.printStackTrace();
OUTPUT IN CONSOLE
in try block
properties are set
b4 lookup(mysqljndi)
afta lookup(mysqljndi)
query is = select * from logindb.userregister
size of rs is :: 0
java.sql.SQLException: weblogic.rmi.extensions.RemoteRuntimeException: Unexpected Exception - with nested exception:
[java.rmi.MarshalException: error marshalling return; nested exception is:
     java.io.NotSerializableException: com.mysql.jdbc.ResultSet]
     at weblogic.jdbc.rmi.SerialResultSet.next(SerialResultSet.java:89)
     at DatabaseToText.main(DatabaseToText.java:69)
Record is getting inserted but when i use select query i cannot get the output...
Regards,

Answer 1

This problem is solved in JDBC section of this forum