Databases
StackOverflow2013
Postsdbo
POSimple injector open generic decorators
 

Note that there are some explanatory texts on larger screens.

plurals
  1. POSimple injector open generic decorators
    primarykey
    data
    text
    <p>I am trying to make use of some of the nice features in simple injector.</p> <p>I am currently having problems with the decorators, they are not getting hit when I expect them too.</p> <p>I am registering them like this:</p> <pre class="lang-cs prettyprint-override"><code>container.RegisterManyForOpenGeneric( typeof(ICommandHandler&lt;&gt;), AppDomain.CurrentDomain.GetAssemblies()); container.RegisterDecorator( typeof(ICommandHandler&lt;&gt;), typeof(CreateValidFriendlyUrlCommandHandler&lt;&gt;), context =&gt; context.ServiceType == typeof(ICommandHandler&lt;CreateProductCommand&gt;) ); container.RegisterDecorator( typeof(ICommandHandler&lt;&gt;), typeof(CreateProductValidationCommandHandler&lt;&gt;), context =&gt; context.ServiceType == typeof(ICommandHandler&lt;CreateProductCommand&gt;) ); </code></pre> <p>I think I must be missing something as I am expecting that a call to <code>ICommandHandler&lt;CreateProductCommand&gt;</code> will invoke <code>CreateValidFriendlyUrlCommandHandler&lt;&gt;</code> and <code>CreateProductValidationCommandHandler&lt;&gt;</code> before running itself.</p> <p>I have tried a different registration like this:</p> <pre class="lang-cs prettyprint-override"><code>container.RegisterManyForOpenGeneric( typeof(ICommandHandler&lt;&gt;), AppDomain.CurrentDomain.GetAssemblies()); container.RegisterDecorator( typeof(ICommandHandler&lt;&gt;), typeof(CreateValidFriendlyUrlCommandHandler&lt;&gt;), context =&gt; context.ImplementationType == typeof(CreateProductCommandHandler) ); container.RegisterDecorator( typeof(ICommandHandler&lt;&gt;), typeof(CreateProductValidationCommandHandler&lt;&gt;), context =&gt; context.ImplementationType == typeof(CreateProductCommandHandler) ); </code></pre> <p>As I thought registering a decorator for <code>ICommandHandler&lt;CreateProductCommand&gt;</code> on the type <code>ICommandHandler&lt;CreateProductCommand&gt;</code> when the <code>CreateProductValidationCommandHandler</code> and <code>CreateValidFriendlyUrlCommandHandler</code> implement <code>ICommandHandler&lt;CreateProductCommand&gt;</code> may well hit a bit of a circular reference.</p> <p>But changing that made no difference.</p> <p>Here is my <code>CreateProductValidationCommandHandler&lt;TCommand&gt;</code>:</p> <pre class="lang-cs prettyprint-override"><code>public class CreateProductValidationCommandHandler&lt;TCommand&gt; : ICommandHandler&lt;CreateProductCommand&gt; { private readonly ICommandHandler&lt;TCommand&gt; decorated; private readonly IValidationService validationService; public CreateProductValidationCommandHandler( ICommandHandler&lt;TCommand&gt; decorated, IValidationService validationService) { this.decorated = decorated; this.validationService = validationService; } public void Handle(CreateProductCommand command) { if (!validationService.IsValidFriendlyName( command.Product.ProductFriendlyUrl)) { command.ModelStateDictionary.AddModelError( "ProductFriendlyUrl", "The Friendly Product Name is not valid..."); return; } if (!validationService.IsUniqueFriendlyName( command.Product.ProductFriendlyUrl)) { command.ModelStateDictionary.AddModelError( "ProductFriendlyUrl", "The Friendly Product Name is ..."); return; } } } </code></pre> <p>And this is my <code>CreateValidFriendlyUrlCommandHandler&lt;TCommand&gt;</code>:</p> <pre><code>public class CreateValidFriendlyUrlCommandHandler&lt;TCommand&gt; : ICommandHandler&lt;CreateProductCommand&gt; { private readonly ICommandHandler&lt;TCommand&gt; decorated; public CreateValidFriendlyUrlCommandHandler(ICommandHandler&lt;TCommand&gt; decorated) { this.decorated = decorated; } public void Handle(CreateProductCommand command) { if (string.IsNullOrWhiteSpace( command.Product.ProductFriendlyUrl)) { command.Product.ProductFriendlyUrl = MakeFriendlyUrl(command.Product.Name); } } } </code></pre>
    singulars
    1. PO
      singulars
      1. PTAnswer
    1. This table or related slice is empty.
    1. PTQuestion
    1. USSteven
    1. USDavid McLean
    plurals
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. PO
      singulars
      1. PTAnswer
    1. VO
      singulars
      1. POSimple injector open generic decorators
      1. This table or related slice is empty.
      1. VTUpMod
    2. VO
      singulars
      1. POSimple injector open generic decorators
      1. USEslam Soliman
      1. VTFavorite
    1. COYour decorators should not be generic. In fact, they are technically no decorators :-)
      singulars
      1. POSimple injector open generic decorators
      1. USSteven
    2. COPlease note that `Appdomain.CurrentDomain.GeAssemblies` only returns assemblies that are already loaded. If all implementations are in the same assembly as `ICommandHandler<T>` it won't be a problem, but otherwise be careful.
      singulars
      1. POSimple injector open generic decorators
      1. USSteven
 

Querying!

 
Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

SQuiL has stopped working due to an internal error.

If you are curious you may find further information in the browser console, which is accessible through the devtools (F12).

Reload