C#•3y ago

Inject http client only for specified service [Answered]

I have a RemoteApiClient that I want to inject to the FooBarService and only to the FooBarService. The reason for this is that the RemoteApiClient is not really meant to be used directly. How do I achieve this? Additionally, the IMemoryCache is injected into the FooBarService, but the IMemoryCache is also used elsewhere.

builder.Services.AddMemoryCache();
builder.Services.AddHttpClient<RemoteApiClient>()
    .AddTransientHttpErrorPolicy(policyBuilder => policyBuilder.WaitAndRetryAsync(Backoff.DecorrelatedJitterBackoffV2(TimeSpan.FromSeconds(1), 5)));

builder.Services.AddScoped<FooBarService>();

builder.Services.AddMemoryCache();
builder.Services.AddHttpClient<RemoteApiClient>()
    .AddTransientHttpErrorPolicy(policyBuilder => policyBuilder.WaitAndRetryAsync(Backoff.DecorrelatedJitterBackoffV2(TimeSpan.FromSeconds(1), 5)));

builder.Services.AddScoped<FooBarService>();

9 Replies

pip•3y ago

Have FooBarService as a param in your RemoteApiClient constructor? or am I missing something

camelOP•3y ago

The RemoteApiClient is a dependency of FooBarService. FooBarService must use the RemoteApiClient internally.

Becquerel•3y ago

you can't restrict which services your registered dependencies can be injected to, outside of not requesting them in the constructors of other services kind of goes against the spirit of DI

Unknown User•3y ago

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camelOP•3y ago

Alright thank you guys for the answers. I’ll see if I’ll go the way with the second service collection or if I’ll just not bother changing it.

Unknown User•3y ago

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camelOP•3y ago

It's definitely not what I want 😄 two service collections sounds like an antipattern

Unknown User•3y ago

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Accord•3y ago

✅ This post has been marked as answered!

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Inject http client only for specified service [Answered]