Unity: providing an argument for an InjectionConstructor

Question

I am using Unity to resolve a repository that requires two factory classes in the parameter. Below is my repository constructor:

//repo constructor
public MyRepo(IChannelClientFactory<IRemotedVisitorChat> chatFactory, IChannelClientFactory<IRemotedVisitorWebsite> siteFactory  )
        {
            ChatFactory = chatFactory;
            SiteFactory = siteFactory;
        }

ChatFactory and SiteFactory are of type class RemotingClientFactory<T> : IChannelClientFactory<T> that has a contructor of:

RemotingClientFactory(string endpointName)

before, RemotingClientFactory had a parameterless constructor, but in doing some refactoring, I added the string endpointName.

I was registering my repository like this:

container.RegisterType<IMyRepo, MyRepo>(new HierarchicalLifetimeManager(), new InjectionConstructor(typeof (RemotingClientFactory)));

originally, there was only one parameter for MyRepo constructor and RemotingClientFactory didn't take any arguments for its constructor

I am getting lost in the weeds reading the Unity docs. How can I provide RemotingClientFactory with an initialization string?

Have you tried with semi manual InjectionFactory approach? — Wiktor Zychla
– Wiktor Zychla, Commented Sep 21, 2014 at 16:00
I was going to use that if I can find an answer to what I was trying to do — Mike_G
– Mike_G, Commented Sep 21, 2014 at 16:04
Are ChatFactory and SiteFactory each classes derived from RemotingClientFactory<IRemotedVisitorChat> and RemotingClientFactory<IRemotedVisitorWebsite> respectively? — Lukazoid
– Lukazoid, Commented Sep 21, 2014 at 16:07

Lukazoid · Accepted Answer · 2014-09-21 16:05:04Z

1

First you need to register your IChannelClientFactory<T> implementations, specifying the endpointName value to use for each. (The string values below should be replaced with the endpointName values you wish to use)

container.RegisterType<IChannelClientFactory<IRemotedVisitorChat>, RemotingClientFactory<IRemotedVisitorChat>>(new InjectionConstructor("ChatEndpointName"));
container.RegisterType<IChannelClientFactory<IRemotedVisitorWebsite>, RemotingClientFactory<IRemotedVisitorWebsite>>(new InjectionConstructor("WebsiteEndpointName"));

Then you can just register your IMyRepo implementation, the longest constructor of MyRepo will be selected by unity and the values be injected upon resolve.

container.RegisterType<IMyRepo, MyRepo>();

answered Sep 21, 2014 at 16:05

Lukazoid

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