http://www.udidahan.com/2006/04/22/service-oriented-reuse/ Enterprise Development Expert & SOA Specialist Sat, 11 Feb 2012 15:16:10 -0600 http://wordpress.org/?v=2.8.4 hourly 1 http://www.udidahan.com/2006/04/22/service-oriented-reuse/comment-page-1/#comment-293 John Wood Thu, 27 Apr 2006 09:03:52 +0000 http://wp_630.weblogs.us/archives/275#comment-293 Although not that common, I find it best to develop re-usable services that have their dependencies passed in almost as parameters (although that's not the exact model I have used personally). So a good customer validation service would have services passed in that know how to retrieve customer information. This is really the only way to achieve true loose coupling and maximum re-use. So can a service have a database - yes it could, but if there's clear potential for re-use then it probably shouldn't. Although not that common, I find it best to develop re-usable services that have their dependencies passed in almost as parameters (although that’s not the exact model I have used personally). So a good customer validation service would have services passed in that know how to retrieve customer information. This is really the only way to achieve true loose coupling and maximum re-use. So can a service have a database – yes it could, but if there’s clear potential for re-use then it probably shouldn’t.

]]> http://www.udidahan.com/2006/04/22/service-oriented-reuse/comment-page-1/#comment-292 Udi Dahan - The Software Simplist Thu, 27 Apr 2006 04:09:22 +0000 http://wp_630.weblogs.us/archives/275#comment-292 When you say that a service has no state, do you mean to say that a service could not have its own DB? If so, could you explain why? When you say that a service has no state, do you mean to say that a service could not have its own DB? If so, could you explain why?

]]> http://www.udidahan.com/2006/04/22/service-oriented-reuse/comment-page-1/#comment-291 John Wood Wed, 26 Apr 2006 03:41:32 +0000 http://wp_630.weblogs.us/archives/275#comment-291 >> "Customer service" - the service in charge of everything dealing with customers << That sounds like a component not a service. A service has one distinct function and usually has no state. Customer validation would be a service. So why wouldn't an order processing service be able to use the customer validation service? >> “Customer service” – the service in charge of everything dealing with customers <<
That sounds like a component not a service. A service has one distinct function and usually has no state. Customer validation would be a service. So why wouldn’t an order processing service be able to use the customer validation service?

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