As always, Survic raised excellent Questions and gave excellent suggestions about my previous post. Survic comments/questions are in bold.
“Business Object Manager” (I guess it is the “Façade Object” -- it is very popular to use "XX_Manager" and "XX_Facade" interchangeably)Business Object Manager is a Mediator between Business/Entity Object and Data Object Layer. It provide an opportunity to aggregate the business objects on Database server and send aggregate object at once to Application Server. This particular element is missing in Jeffery’s Architecture (I could be wrong) or in Pet Shop Architecture (I am very sure because I am burnt by it).
It also enables Business Object Layer and Business Transfer Object to one layer instead of being multiple layers as shown in the code.
Process Object” (I guess it is the “Workflow Object”)
Yes, Survic is right.
All the Workflow logic, additional processing, co-ordination and control logic will go there.
Repository Object” (I’m pretty sure it is the “Façade Object”).
In my case, it is responsibility of Gateway/Factory Layer. I may take out of Architecture diagram.
Application architectures” and “service architectures” are critically different?No. There are subtle but major Design differences.
SOA = Good Distributed Programming Practices + Message Version Control + More Loose Coupling
In Distributed Architecture/Client Server Architecture, generally you may have control over client applications. In my internal application architecture, I can make changes to Business Object layer and regenerate the proxy object and recompile the Gateway/Factory Layer and make changes to UI. So there is little tight coupling between server side component and consumer application. Basically I am sharing code with Consumer application. Performance is big concern. It is more RPC style of communication
Distributed computing is also more end-to-end integration. Component A connects to Component B and component B connects to Component C
In Service Oriented Architecture, you don't have control over client applications or other consumer Services. in general. You have to be more subtle over version control. You share contract and chances are that your application may support multiple contracts.In that scenario, I design the Incoming message as XML string and share XML Schema with client. That way Interface of Service always remain same (no need to regenrate WSDL )but you message structure may change. It is more Document Style of communiction.
SOA is more like workflow. Component A may connect to Componet B or may be Component C.
Here is nice article by Rockford Lhotka
However I think that if you have good Middle Layer, adding a true service layer should be a small issue.
Do they have some implementation code? My interpretation is same like you. It is decent architecture if we both are right. Last time , I used pet shot .net architecture, it left a very bad taste in mouth. :)
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