CODEWITHSUNDEEP
dependency-injection.net-core
JadedEric
JadedEric

Reputation: 2083

Resolving dependencies in a reference assembly in a .net core console application

I'm testing a small console application which will be used to display information based on a Quartz queue and I'm struggling to the the dependency to resolve within a reference assembly.

My console application references an EventData class, which has a dependency on IUtilities, within an assembly called App.Monitor, it's partial'ed as the base is code generated, and we're adding these properties / methods to the class for specific reasons...

public partial class EventData
{
    private readonly IUtilities _utilities;

    [JsonIgnore]
    public DateTime? DateStamp => _utilities?.Epoch(Timestamp);

    [JsonIgnore]
    public EventType EventType =>
        (EventType)EventType.Parse(typeof(EventType), (CultureInfo.CurrentCulture.TextInfo.ToTitleCase(Event)));

    public EventData(IUtilities utitlies)
    {
        _utilities = utitlies;
    }
}

In my console application I set up .net core dependency injection per various examples on the net, code for reference:

public IServiceProvider BuildDependencies()
{
    services.AddTransient<IHttpContextAccessor, HttpContextAccessor>();
    services.AddTransient<IUtilities, Utilities>();

    return services.BuildServiceProvider();
}

Then somewhere in the console application, I'm doing a call that should initiate this dependency in utilities, which it doesn't do, IUtilities is always NULL:

provider.GetRequiredService<IUtilities>(); // thought this would fix it...

var list = JsonConvert.DeserializeObject<List<QuartzJobs>>(json);    
var stamp = list[0].EventData.DateStamp;

Update

QuartzJobs (code generated)

public class QuartzJobs 
{
    [JsonProperty("event-data")]
    public EventData EventData { get; set; }
}

EventData (code generated)

public partial class EventData
{
    [JsonProperty("timestamp")]
    public double Timestamp { get; set; }
}

EventData (partial'ed with custom logic)

public partial class EventData
{
    private readonly IUtilities _utilities;

    [JsonIgnore]
    public DateTime? DateStamp => _utilities?.Epoch(Timestamp);

    [JsonIgnore]
    public EventType EventType =>
        (EventType)EventType.Parse(typeof(EventType), (CultureInfo.CurrentCulture.TextInfo.ToTitleCase(Event)));

    public EventData(IUtilities utitlies)
    {
        _utilities = utitlies;
    }
}

Upvotes: 1

Views: 64

Answers (1)

Nkosi
Nkosi

Reputation: 247153

In the console you would need to take over the role of the framework and get the dependency and call the desired member

var utility = provider.GetRequiredService<IUtilities>();

var list = JsonConvert.DeserializeObject<List<QuartzJobs>>(json);    

var stamp = utility?.Epoch(list[0].EventData.Timestamp);

That is because the container/provider is not the one resolving the EventData, so nothing is being injected.

Upvotes: 1

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