yes i am serializing the ShoppingBasketBean, regarding sesond problem (versionId problem) i am changing Orderdata, ItemData ..etc from class file to Collection i.e new ShoppingBasketBean is a collection of ArrayLists. but my main consern is performance with persistang the Collection into database.
Narendranatha R Sajjala, 1800flowers.com Ph:516-237-4881 -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]] Sent: Thursday, January 10, 2002 6:11 PM To: [EMAIL PROTECTED] Subject: Re: ShoppingBasket persistence problem >>>>> "Narendranatha" == Narendranatha R Sajjala <Narendranatha> writes: Narendranatha> persisting Shoppingbasket as a Blob object is decreasing the performance, Narendranatha> any one can give a better idea about alternative for this. Narendranatha> At present blob object contains ShoppingBasketBean Narendranatha> it is a collection of Narendranatha> 1)shopperId Narendranatha> 2)OrderData Narendranatha> 3)ItemData Narendranatha> 4)RecipientData Narendranatha> 5)BillingMessage Narendranatha> 6)SoldToMessage Narendranatha> as per the business requirements we need to persist this Object in database Narendranatha> everytime user add an item to basket Narendranatha> so if user adds 10 items to shopping basket it results 1 INSERT and 9 UPDATE Narendranatha> statements against database using blob object. Narendranatha> another problem is one of the object is changes for example added a new Narendranatha> field into ItemData.java as per business requirements Narendranatha> i am getting ClassCastException versionID is changed. So you're serializing a bean into a db BLOB? I would consider these alternatives: 1. Change the requirements. Don't persist baskets to the db. In some scenarios, this would be a reasonable decision, but not in others. 2. Don't use a BLOB, define a normal database table. 3. Persist baskets to a simpler database, like a file system. Do you understand why you're getting the "versionID" error? This is directly because of your change to the class. You might consider hardcoding the serialVersionID in the class. Supposedly, this will slightly increase performance, although you would now have the responsibility to manage changes to it correctly. -- =================================================================== David M. Karr ; Best Consulting [EMAIL PROTECTED] ; Java/Unix/XML/C++/X ; BrainBench CJ12P (#12004) -- To unsubscribe, e-mail: <mailto:[EMAIL PROTECTED]> For additional commands, e-mail: <mailto:[EMAIL PROTECTED]> -- To unsubscribe, e-mail: <mailto:[EMAIL PROTECTED]> For additional commands, e-mail: <mailto:[EMAIL PROTECTED]>
