{"id":790,"date":"2025-06-30T19:06:37","date_gmt":"2025-06-30T19:06:37","guid":{"rendered":"https:\/\/docs.sisus.co\/init-args\/?p=790"},"modified":"2025-07-14T19:26:39","modified_gmt":"2025-07-14T19:26:39","slug":"generic-services","status":"publish","type":"post","link":"https:\/\/docs.sisus.co\/init-args\/advanced\/generic-services\/","title":{"rendered":"Generic Services"},"content":{"rendered":"

Types that contain generic type parameters can also be registered as global services<\/a> by adding the [Service] attribute<\/a> to them:<\/p>\n

using Sisus.Init;\r\n\r\n[Service]\r\npublic class Logger<T>\r\n{\r\n    public void Info(string message) => Debug.Log(typeof(T).Name + \" - \" + message);\r\n}<\/pre>\n
When this is done, no instance of the global service is created automatically during initialization – even if you do not set LazyInit<\/em> to\u00a0true <\/em>on the [Service] attribute. Instead, an instance will only be created lazily at the moment when the first client<\/a> that depends on it is being initialized:<\/p>\n
using Sisus.Init;\r\nusing UnityEngine;\r\n\r\npublic class Client : MonoBehaviour<Logger<Client>>\r\n{\r\n    \/\/ The Logger<Client> object gets created when the first Client component is being loaded\r\n    protected override void Init(Logger<Client> logger) => logger.Info(\"Hello, World!\");\r\n}<\/pre>\n
If multiple clients depend on the global service, but with different generic type arguments, then a new global service instance is created for each different variation that is requested by a client (e.g. Logger<Client1>,<\/em> Logger<Client2><\/em> etc.).<\/p>\n
It is also possible to register the service using a generic interface as its defining type:<\/p>\n
using Sisus.Init;\r\n\r\n[Service(ILogger<>)]\r\npublic class Logger<T> : ILogger<T>\r\n{\r\n    public void Info(string message) => Debug.Log(typeof(T).Name + \" - \" + message);\r\n}<\/pre>\n
Then clients can depend on the interface type instead of the concrete type of the service:<\/p>\n
using Sisus.Init;\r\nusing UnityEngine;\r\n\r\npublic class Client : MonoBehaviour<ILogger<Client>>\r\n{\r\n    protected override void Init(ILogger<Client> logger) => logger.Info(\"Hello, World!\");\r\n}<\/pre>\n
If you can’t (or don’t want to) add the [Service] attribute to the generic type directly – for example, because it’s part of a third-party package – then you can define a service initializer with a generic type parameter and add the [Service] attribute to it instead. Init(args) can lazily determine the generic type argument for the service initializer based on the service type that is being requested by a client.<\/p>\n
Here is an example of how ZLogger<\/a> could be registered as your global logging service using a generic service initializer:<\/p>\n
using Microsoft.Extensions.Logging;\r\nusing Sisus.Init;\r\nusing UnityEngine;\r\nusing ZLogger.Unity;\r\n\r\n[Service(typeof(ILogger<>))]\r\nsealed class ZLoggerInitializer<T> : ServiceInitializer<ILogger<T>>\r\n{\r\n    public override ILogger<T> InitTarget()\r\n    {\r\n        var factory = LoggerFactory.Create(configure =>\r\n        {\r\n            configure.SetMinimumLevel(LogLevel.Trace);\r\n            configure.AddZLoggerUnityDebug();\r\n        });\r\n\r\n        return factory.CreateLogger<T>();\r\n    }\r\n}<\/pre>\n
 <\/p>\n","protected":false},"excerpt":{"rendered":"
Types that contain generic type parameters can also be registered as global services by adding the [Service] attribute to them: using Sisus.Init; [Service] public class Logger<T> { public void Info(string message) => Debug.Log(typeof(T).Name + ” – ” + message); } When this is done, no instance of the global service is created automatically during initialization ..<\/p>\n
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Read more<\/a><\/p>\n","protected":false},"author":3,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[1],"tags":[],"_links":{"self":[{"href":"https:\/\/docs.sisus.co\/init-args\/wp-json\/wp\/v2\/posts\/790"}],"collection":[{"href":"https:\/\/docs.sisus.co\/init-args\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/docs.sisus.co\/init-args\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/docs.sisus.co\/init-args\/wp-json\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/docs.sisus.co\/init-args\/wp-json\/wp\/v2\/comments?post=790"}],"version-history":[{"count":2,"href":"https:\/\/docs.sisus.co\/init-args\/wp-json\/wp\/v2\/posts\/790\/revisions"}],"predecessor-version":[{"id":792,"href":"https:\/\/docs.sisus.co\/init-args\/wp-json\/wp\/v2\/posts\/790\/revisions\/792"}],"wp:attachment":[{"href":"https:\/\/docs.sisus.co\/init-args\/wp-json\/wp\/v2\/media?parent=790"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/docs.sisus.co\/init-args\/wp-json\/wp\/v2\/categories?post=790"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/docs.sisus.co\/init-args\/wp-json\/wp\/v2\/tags?post=790"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}