Re: i/o module

rob@xxxxxxxxx wrote:

That makes more sense.

So, using an item that recently (today) appeared on these lists, instead of chaining to a currency translation table to convert USD to Euro's then you do:
Euro=CurrencyTranslate(USD : 'EURO');
Then that routine can determine if to use a web service, chain to a file because the service is unavailable or your internet connection is down, or ...

Absolutely. Or, in the ever-growing world of multi-company applications, the getCustomerInfo routine could decide whether the customer is YOUR customer, so you can get the information from one database, or a customer from a company you acquired, so it gets it from a different database, or a customer of a partner, which means using some sort of service.

This is the real promise of SOA in my mind. Not the ability to look up a sort of yellow pages of services and magically find something (I never thought that would fly), but instead to be able to manage data from disparate resources but allow the programmer to concentrate on the business logic instead of the mechanics of getting the data.

Joe