Direct DB access from Session Bean w/o using Serialized Objects

Question

I am developing a system where I am receiving some messages (data ) inside session bean and I want to log that data into data base �.i.e inserting that data in to various tables. I am not showing that data to client ( that is taken care by another application).
So I am directly calling insert methods on various tables instead of going for serialized classes for each of that tables and calling setter methods. Is this approach correct? Or this will create nightmares when millions of messages are to be logged? Do I have to make serialized objects? Please post the suggestions ..Thank you in advance.
If session bean is making direct inserts in the DB using Helper classes as shown below �is there any problem of concurrency?? Means multiple session bean instances inserting data in the same table using the helper class will create any problems?? I am using MySql db presently. Or all will work fine coz I am using the data source and pool available in welogic app server?
Is this a good approach if my application is doing inserts 90% of times? or I have to use entity beans or serialized objects encapsulating each class?
public class Logger implements SessionBean
DAO dao = getDAO();
dao.insertXyzLog(�x�, �y�,�.);
private DAO getDAO(){
if(Dao == null) {
oao = DAOFactory.getDAO();
return Dao;
//other std methods
public interface DAO {
// methods to directly insert data in to the tables
//some methods to look for required value in another tables
public abstract void insertXyzLog (String x, Stringy, ���.);
public class DAOImpl implements DAO {
// look up for JNDI data sourse
//method to return connection
public void insertXyzLog (String x, Stirng y�){
//SQLs for inserting into Xyz table using connection obtained above.

Answer 1

Hi,
Nothing wrong in using Helper class to insert into table. It won't create problem as long as your database server able to handle that many request from client.
If you use weblogic server and datasource, the server will take care of all connection pool management depending upon your configuration parameters.
Moreover, insert won't lock the table. So you need not worry about those things.
Best Luck,
Senthil Babu
Developer Technical Support
SUN Microsystems
http://www.sun.com/developers/support/