Problem when perform acceptChanges method on CachedRowset twice

Question

Hi,
i'm using a CachedRowSet in my application.
All goes fine, when i retrieve data from database. But when i'm trying to update my data more than once, a SyncProviderException occur.
This is my code:
crset.updateRow();
crset.acceptChanges(DBProperties.getInstance().getConn());
crset.updateString("first_name", "new val");
crset.updateRow();
crset.acceptChanges(DBProperties.getInstance().getConn());
The first call of acceptChanges work fine, but the second call to the same method throw a SyncProviderException.
What's wrong with this code?
Message was edited by:
zorgz

Answer 1

>
How Can I loop through a piece of code, as if I am running that code for the first time. (i.e. How can I clear all the variables and data and start a new clean instance).
>
Simple - the scope of variables is limited to the block that the variable is in
1. define a new block for that piece of code using { and }.
2. inside the block reinitialize the variables that the code in the block uses
3. don't use any variables that are NOT initialized at the start of the block
This sample code should show you the concept. It has a variable 'j' that is used outside the block to contain the loop iteration number and is used inside the block to contain the value 47.
Note that setting the variable to 47 inside the block has no effect on the value that was set outside the block.
public class Test3 {
    public static void main(String[] args) {
        for (int i = 0; i < 5; i++)
            int j;
            j = i;
            System.err.println("Outside j = " + j);
            {   // this begins a new block
                j = 47;  // initialize ALL variables used inside the block here - don't use ANY vars that are not initialized at the block start
                System.err.println("Inside j = " + j);
            }   // this ends the new block - the 'inside' value of 'j' no longer exists
Outside j = 0
Inside j = 47
Outside j = 1
Inside j = 47
Outside j = 2
Inside j = 47
Outside j = 3
Inside j = 47
Outside j = 4
Inside j = 47