Dependency injection

• Singleton: Singleton dependencies are created once and then injected where needed.
• Scoped: Scoped dependencies are created once per request. Whether you use it in the constructor or the method itself doesn't matter since they both link to the same object.
• Transient: Transient dependencies are created every time one is requested. If you request a transient dependency in the constructor and again in a method, those two requests are two separate instances.

Dependency injection setup

ICloudCodeSetup

AddScoped

AddTransient

using Unity.Services.CloudCode.Core;namespace ExampleModule;public interface IRandomNumber{    public int GetRandomNumber();}public class LockedRandomNumber : IRandomNumber{    private int randomNumber;    public LockedRandomNumber()    {        randomNumber = Random.Shared.Next();    }    public int GetRandomNumber()    {        return randomNumber;    }}public class ModuleConfig : ICloudCodeSetup{    public void Setup(ICloudCodeConfig config)    {        config.Dependencies.AddSingleton<IRandomNumber, LockedRandomNumber>();    }}

• The singleton generates a random number once, and then keeps it as long as the service is live.
• The scoped creates a new instance per request but the number stays the same for that request regardless of where you request it.
• The transient creates a new instance every single time it's requested, and thus returns a random number each time.

Dependency injection usage

CloudCodeFunction

using Unity.Services.CloudCode.Core;namespace ExampleModule;public struct DependencyInjectionResult{    public int ConstructorNumber;    public int MethodNumber;}public class TestDependencyInjection{    private int number;    public TestDependencyInjection(IRandomNumber randomNumber)    {        number = randomNumber.GetRandomNumber();    }    [CloudCodeFunction("TestInjection")]    public DependencyInjectionResult TestInjection(IRandomNumber randomNumber)    {        return new DependencyInjectionResult        {            // Will always return the same number during the session            ConstructorNumber = number,            MethodNumber = randomNumber.GetRandomNumber(),        };    }}