Help: Problem in simultaneous insert in same table using JPA

[suvsuv]

Description: Here is a for loop. that means if 'for loop' is running 5 times - there will be 5 times insert/update in a same table. Parameters of the function are array of string.
But i bring 3 sets of data in array of string - that means for loop will run 3 times - and it should 'insert' 3 times in same table simultaneously. but interestingly it is inserting just for first time and ignoring others. But i have checked that value is changing for every time.


public String updateInsertInv(int productNo, int timekey, String caller_pid[], String caller_amt[], String callerUpIn[])
throws ClassNotFoundException, SQLException
{
EntityTransaction et = em.getTransaction();
try {
et.begin();
int len = productNo;
int b=0;
// Daily_inventory c[] = new Daily_inventory[100];
Daily_inventory c = new Daily_inventory();

int tkey = 0, productID = 0 , k =0;
float begin_inv = 0, purchase_amt=0, end_inv=0,the_amt=0,waste =0,missing=0;
String tt = "suv";
for(int a=0; a<len;a++)
{
tkey = timekey;
productID = Integer.parseInt(caller_pid[b]);
the_amt = Integer.parseInt(caller_amt[b]);

if(callerUpIn[b].equals("update"))
{
//update
}
else if(callerUpIn[b].equals("insert"))
{
//insert
c.setTime_id(tkey);
c.setProduct_id(productID);
c.setBegin_inv(begin_inv);
c.setPurchase(purchase_amt);
c.setEnd_inv(end_inv);
c.setTheoratical_amt(the_amt);
c.setWaste(waste);
c.setMissing(missing);

em.persist(c);
}

tt = tt + tkey + productID + the_amt + callerUpIn[b]+" ";
}
b=b+1;
}
et.commit();
return tt;
}
catch (Exception e) {
e.printStackTrace();
return e.getMessage();
}

}

[Leen]

Wrong place to ask again. Redirecting...