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PODDD layers - Communication with entities
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  1. PODDD layers - Communication with entities
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    copied!<p>I'm getting started with domain driven design in asp.net mvc with c# and have a small sample project I am creating. I currently have a project for my domain layer, service layer, web, and also a console application. I am also using mongodb as my database.</p> <p>Currently my project has groups with people belonging to those groups which I have a class called <code>Group</code> and <code>Person</code> in my domain layer something like below (simplified). <code>Group</code> and <code>Person</code> also represent what the collection <code>Group</code> looks like in my mongodb database.</p> <pre><code>public class Group { public string Name { get; set; } public List&lt;Person&gt; People { get; set; } } public class Person { public string FirstName { get; set; } public string LastName { get; set; } } </code></pre> <p>The way I understand it is my website and my console application should be communicating to my services layer which acts as a sort of facade and should never see the domain layer? </p> <p>The thing I am unsure of is in my console application or website if I wanted to ask the service layer for all the groups normally I would expect that I would be asking for something like</p> <pre><code>var groupService = new GroupService(); List&lt;Group&gt; groups = groupService.GetGroups(); </code></pre> <p>Except in this instance as my group, and person classes are in the domain layer which my console app and website have no idea about I can't ask for a list of <code>Group</code> as my application has no idea what a <code>Group</code> is.</p> <p>Should my service layer be outputting the result as something else such as Json where it is up to my website and console app or say if I had an api that others could access to work out what to do with this data? or have I got something mixed up here?</p> <p>EDIT:</p> <p>In the future I plan to use my service and domain in an android app. I am thinking of using a restful service. I don't plan (at this stage) to have this as a public API.</p>
 

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