Comments on: Request/Response Service Layer: Requests And Responses http://davybrion.com/blog/2009/11/requestresponse-service-layer-requests-and-responses/ Trying to walk that thin line between intelligence and ignorance Sun, 14 Mar 2010 15:41:46 +0100 http://wordpress.org/?v=2.9.2 hourly 1 By: Davy Brion http://davybrion.com/blog/2009/11/requestresponse-service-layer-requests-and-responses/comment-page-1/#comment-22908 Davy Brion Mon, 09 Nov 2009 16:03:36 +0000 http://davybrion.com/blog/?p=1796#comment-22908 @Aaron oh that would work with the keyed adding/retrieving of the requests/responses... guess you have to wait on the posts about client-side usage ;) @Awkward Coder Instead of using the KnownType attribute all over the place, we just register them once before the service starts up and then use WCF's ServiceKnownType to dynamically fetch the list of known types once before the service is first used. @Aaron

oh that would work with the keyed adding/retrieving of the requests/responses… guess you have to wait on the posts about client-side usage ;)

@Awkward Coder

Instead of using the KnownType attribute all over the place, we just register them once before the service starts up and then use WCF’s ServiceKnownType to dynamically fetch the list of known types once before the service is first used.

]]> By: Aaron Fischer http://davybrion.com/blog/2009/11/requestresponse-service-layer-requests-and-responses/comment-page-1/#comment-22907 Aaron Fischer Mon, 09 Nov 2009 15:55:45 +0000 http://davybrion.com/blog/?p=1796#comment-22907 generic like EntityListRequest : Request { Criteria{get;set} Id{get;set} } EntityListResponse : Response { IList Entities } generic like

EntityListRequest : Request
{
Criteria{get;set}
Id{get;set}
}
EntityListResponse : Response
{
IList Entities
}

]]> By: Awkward Coder http://davybrion.com/blog/2009/11/requestresponse-service-layer-requests-and-responses/comment-page-1/#comment-22906 Awkward Coder Mon, 09 Nov 2009 15:53:25 +0000 http://davybrion.com/blog/?p=1796#comment-22906 let me guess you're going to expose the message schemas via the actual service... let me guess you’re going to expose the message schemas via the actual service…

]]> By: Davy Brion http://davybrion.com/blog/2009/11/requestresponse-service-layer-requests-and-responses/comment-page-1/#comment-22905 Davy Brion Mon, 09 Nov 2009 15:26:24 +0000 http://davybrion.com/blog/?p=1796#comment-22905 You can add multiple requests of the same type, but then you'd have to add them with a specific key value, and retrieve the responses of that type with the correct key value that's also covered in a future post :) what exactly do you mean with generic entity requests/responses? You can add multiple requests of the same type, but then you’d have to add them with a specific key value, and retrieve the responses of that type with the correct key value

that’s also covered in a future post :)

what exactly do you mean with generic entity requests/responses?

]]> By: Aaron Fischer http://davybrion.com/blog/2009/11/requestresponse-service-layer-requests-and-responses/comment-page-1/#comment-22904 Aaron Fischer Mon, 09 Nov 2009 15:24:29 +0000 http://davybrion.com/blog/?p=1796#comment-22904 Fetching by response means one request type to one response type, I am not sure in the long term that's good. It does interfere with generic entity requests/responses for example. Fetching by response means one request type to one response type, I am not sure in the long term that’s good. It does interfere with generic entity requests/responses for example.

]]> By: Davy Brion http://davybrion.com/blog/2009/11/requestresponse-service-layer-requests-and-responses/comment-page-1/#comment-22901 Davy Brion Mon, 09 Nov 2009 11:22:14 +0000 http://davybrion.com/blog/?p=1796#comment-22901 no i have a better solution for that, which you'll see in the Exposing Through WCF post :) (which is currently scheduled for wednesday) no i have a better solution for that, which you’ll see in the Exposing Through WCF post :)
(which is currently scheduled for wednesday)

]]> By: Awkward Coder http://davybrion.com/blog/2009/11/requestresponse-service-layer-requests-and-responses/comment-page-1/#comment-22900 Awkward Coder Mon, 09 Nov 2009 10:33:31 +0000 http://davybrion.com/blog/?p=1796#comment-22900 'If your service needs to be interoperable with other platforms or you can’t share the assembly containing the types, then you obviously do need to use the DataContract/DataMember attributes...' Should mention you need to use the 'KnownType' attributes on the base 'Request' & 'Response' types to include all derived types in the client side proxy. ‘If your service needs to be interoperable with other platforms or you can’t share the assembly containing the types, then you obviously do need to use the DataContract/DataMember attributes…’

Should mention you need to use the ‘KnownType’ attributes on the base ‘Request’ & ‘Response’ types to include all derived types in the client side proxy.

]]> By: Awkward Coder http://davybrion.com/blog/2009/11/requestresponse-service-layer-requests-and-responses/comment-page-1/#comment-22899 Awkward Coder Mon, 09 Nov 2009 10:00:10 +0000 http://davybrion.com/blog/?p=1796#comment-22899 DOH! Ignore my last comment... DOH!

Ignore my last comment…

]]> By: Awkward Coder http://davybrion.com/blog/2009/11/requestresponse-service-layer-requests-and-responses/comment-page-1/#comment-22898 Awkward Coder Mon, 09 Nov 2009 09:57:43 +0000 http://davybrion.com/blog/?p=1796#comment-22898 How does the client of the (WCF) service generate a proxy for all the different message types? In other words how does the client know about the structure of 'GetProductOverviewsRequest' when it is not explicitly exposed\declared on the interface. How does the client of the (WCF) service generate a proxy for all the different message types?

In other words how does the client know about the structure of ‘GetProductOverviewsRequest’ when it is not explicitly exposed\declared on the interface.

]]> By: Davy Brion http://davybrion.com/blog/2009/11/requestresponse-service-layer-requests-and-responses/comment-page-1/#comment-22894 Davy Brion Mon, 09 Nov 2009 07:22:19 +0000 http://davybrion.com/blog/?p=1796#comment-22894 @Aaron that would work if the client would retrieve its response based on the index of the corresponding request, but you'll see in a future post that we retrieve the response based on its expected type, not the index. @Aaron

that would work if the client would retrieve its response based on the index of the corresponding request, but you’ll see in a future post that we retrieve the response based on its expected type, not the index.

]]> By: Aaron Fischer http://davybrion.com/blog/2009/11/requestresponse-service-layer-requests-and-responses/comment-page-1/#comment-22892 Aaron Fischer Mon, 09 Nov 2009 00:08:10 +0000 http://davybrion.com/blog/?p=1796#comment-22892 Why pass the exception parameters in every response? Since you have OO, you can return a strongly typed ErrorResponse. Why pass the exception parameters in every response? Since you have OO, you can return a strongly typed ErrorResponse.

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