| Interface | Description | 
|---|---|
| LargeProductQueryHandler | Handle requests for products that are too large to fit in an  XMLQueryobject. | 
| QueryHandler | Handler for queries in a product service. | 
| Retriever | Retrievers retrieve products. | 
| Exception | Description | 
|---|---|
| HttpRedirectException | A class | 
| ProductException | Checked exception to indicate a product fault. | 
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