First project in Flex

Since I have limited option, I used Flex as my UI, asp as my webserver that run sql and send response as xml.

Its just a first draft, but I'm very pleased with the results

First time learning from Video

Its my first time that I spend my night (instead of sleeping), watching video of learn Flex.
I find it very useful and I recommend everyone who want to learn Flex to watch this.
You can find the movies in here: http://www.adobe.com/devnet/flex/videotraining/

JTable, detect when any cell's value changes

I have a dataModel, TableModel that extends DefaultTableModel.
I needed to know If the user changed the values of the table,
for this I override the method setValueAt:

public void setValueAt(Object aValue, int row, int column){
super.setValueAt(aValue, row, column);
tableModelChanged = true;
}

Transaction not successfully started

I got an exception : org.hibernate.TransactionException: Transaction not successfully started

The problem in my code was :

Session session = null; Transaction tx = null; session = PriorityWrapperHibernateUtil.getOneTimeSession(); tx = session.getTransaction(); for (int i = 0; i < objects.length; i++) { Object object = objects[i]; session.saveOrUpdate(object); } if(tx != null){ tx.commit(); }

instead, it should be : tx = session.beginTransaction();

I used the Koders site to find out where the exception is comming from

Send an Object using HttpClient

I was looking for a way to send an Object (in my case, a Class) using HttpClient.

This is how I did it:

PostMethod httpMethod =new PostMethod(servletName);

HttpMethodParams httpMethodParams = new HttpMethodParams();

httpMethodParams.setParameter("Object Name", Object);

ByteArrayOutputStream bos = new ByteArrayOutputStream();

ObjectOutputStream oos = new ObjectOutputStream(bos);

oos.writeObject(tableDataTO);

ByteArrayRequestEntity byteArrayRequestEntity = new ByteArrayRequestEntity(bos.toByteArray());

httpMethod.setRequestEntity(byteArrayRequestEntity);

HttpClientManager.getInstance().executeRequest(httpMethod);

and in the other side, the Servlet side:

InputStream inputStream = request.getInputStream();

ObjectInputStream oos = new ObjectInputStream(inputStream);

ClassName className = null;

try {

className  = (ClassName ) oos.readObject();

} catch (ClassNotFoundException e) {

log.error("Unable to get ClassName  object from the request", e);

}

create forum using Flex

Since I start to use Flex (well, learning....), I want to create a forum using Flex,
any idea? any one?