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POStruggling with runtime setup of some castle components
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  1. POStruggling with runtime setup of some castle components
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    copied!<p>My question (I think) can be simply described by this question:</p> <p><strong>How can I get a "Manager" class to have a list of all possible concrete implementations of a specific interface that have been registered as components injected into it so it can iterate through them?</strong> <em>(And because of annoying architecture reasons I can't use the app.config to register my components - so runtime registration only I guess)</em></p> <p><strong>EDIT:</strong><br> Ah hah! - Discovered that I can pass in my own configuration file using something like:</p> <pre><code>var container = new WindsorContainer(new XmlInterpreter("filename")); </code></pre> <p>so - I can just use the xml config route I stated below - this means that I don't have to worry about the instantiation of the child objects as they have injected dependencies themselves in my Real Life situation.</p> <p><strong>EDIT:</strong><br></p> <p><br > <br > <br ></p> <p>To try and aid your understanding of my issue though, I've set out below a simple repro showing my confusion! (Please forgive the terrible domain concept!)</p> <p>This is a simple console app that has a manager that will run an action on a list of objects that it's given.</p> <p><strong>The code:</strong> </p> <pre><code>public class Program { public static void Main() { var container = new WindsorContainer(new XmlInterpreter()); var manager = container.Resolve&lt;AnimalManager&gt;(); manager.PokeAnimals(); container.Release(manager); } } public interface IMakeNoise { void MakeNoise(); } public class Cat : IMakeNoise { public void MakeNoise() { Console.WriteLine("Meow"); } } public class Dog : IMakeNoise { public void MakeNoise() { Console.WriteLine("Woof"); } } public class AnimalManager { private readonly IList&lt;IMakeNoise&gt; noisemakers = new List&lt;IMakeNoise&gt;(); public AnimalManager(IList&lt;IMakeNoise&gt; noisemakers) { this.noisemakers = noisemakers; } public void PokeAnimals() { foreach (var noisemaker in noisemakers) { noisemaker.MakeNoise(); } } } </code></pre> <p><strong>The config file</strong> used looks like:</p> <p> </p> <pre><code>&lt;configSections&gt; &lt;section name="castle" type="Castle.Windsor.Configuration.AppDomain.CastleSectionHandler, Castle.Windsor"/&gt; &lt;/configSections&gt; &lt;castle&gt; &lt;components&gt; &lt;component id="Dog" service="CastleListTest.IMakeNoise, CastleListTest" type="CastleListTest.Dog, CastleListTest" /&gt; &lt;component id="Cat" service="CastleListTest.IMakeNoise, CastleListTest" type="CastleListTest.Cat, CastleListTest" /&gt; &lt;component id="AnimalManager" service="CastleListTest.AnimalManager, CastleListTest" type="CastleListTest.AnimalManager, CastleListTest"&gt; &lt;parameters&gt; &lt;noisemakers&gt; &lt;list&gt; &lt;item&gt;${Cat}&lt;/item&gt; &lt;item&gt;${Dog}&lt;/item&gt; &lt;/list&gt; &lt;/noisemakers&gt; &lt;/parameters&gt; &lt;/component&gt; &lt;/components&gt; &lt;/castle&gt; </code></pre> <p></p> <p><strong>My Problem:</strong></p> <p>The above all works fine. However I can't define in an xml config file which kind of noisemakers I have. I won't know until runtime whether I have a cat, dog, 2 cats and a goldfish or whatever...</p> <p>The only way I can see of doing this is best described by the code below. The problem with this is that I'm having to instantiate my NoiseMakers: "Dog" and "Cat". This seems wrong, against Castle, and in my actual example, it's something I really don't want to do. So what am I doing wrong? <strong>How can I get a "Manager" class to have a list of all possible concrete implementations of a specific interface that have been registered as components injected into it so it can iterate through them?</strong></p> <pre><code> var container = new WindsorContainer(); container.AddComponent("Dog", typeof(IMakeNoise), typeof(Dog)); container.AddComponent("Cat", typeof(IMakeNoise), typeof(Cat)); container.AddComponent( "AnimalManager", typeof(AnimalManager), typeof(AnimalManager) ); IList&lt;IMakeNoise&gt; noisemakers = new List&lt;IMakeNoise&gt; {new Dog(), new Cat()}; var manager = container.Resolve&lt;AnimalManager&gt;( new Hashtable { { "noisemakers", noisemakers } } ); manager.PokeAnimals(); container.Release(manager); </code></pre>
 

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