The COBOL program contains four separate functions, read, add, delete and next. These functions are exposed by a single entry point in a program. The functions are broken out into separate discrete operations.
The parameters to these operations are based upon the parameters required by the COBOL program for the specified operation. You can express some parameters differently, for example, the file status code can be changed to a more readable error message.
The following tables show the operations of the Web service and the parameters used by each operation:
| Operation | Input data type | Output data type |
|---|---|---|
| nextBook | string | BookReturn |
| addBook | BookDetail | BookReturn |
| deleteBook | string | BookReturn |
| readBook | string | BookReturn |
| Parameter | Data type |
|---|---|
| Title | string |
| Type | string |
| Author | string |
| StockNo | string |
| ISBN | long |
| Retail | string |
| Onhand | int |
| Sold | int |
| Parameter | Data type |
|---|---|
| Book | BookDetail |
| Status | string |
| StatusNo | int |
With these operations, only StockNo is being used for readBook, even though the Book application is capable of looking up records based on other fields. You can create other operations that enable you to retrieve records using different fields.