Keyed service \u00f6zelli\u011finin kullan\u0131m\u0131n\u0131 pratikte tecr\u00fcbe edebilmek i\u00e7in \u00f6ncelikle a\u015fa\u011f\u0131daki servis yap\u0131lanmas\u0131n\u0131 in\u015fa edelim:<\/p>\n
\r\npublic interface IPersonService\r\n{\r\n    string GetPersonType { get; }\r\n}\r\n<\/pre>\n<\/div>\n\n\r\npublic class SalesDepartmentPersonService : IPersonService\r\n{\r\n    public string GetPersonType => "Sales Department";\r\n}\r\n<\/pre>\n<\/div>\n\n\r\npublic class JobDepartmentPersonService : IPersonService\r\n{\r\n    public string GetPersonType => "Job Department";\r\n}\r\n<\/pre>\n<\/div>\n\n\r\npublic class AccountingDepartmentPersonService : IPersonService\r\n{\r\n    public string GetPersonType => "Accounting Department";\r\n}\r\n<\/pre>\n<\/div>\nYukar\u0131daki \u00e7al\u0131\u015fmalara g\u00f6z atarsan\u0131z e\u011fer ‘IPersonService’ isminde bir interface ve bu interface’i implemente eden \u00fc\u00e7 farkl\u0131 concrete s\u0131n\u0131f\u0131 mevcuttur.<\/p>\n
E\u011fer ki, keyed service \u00f6zelli\u011fi olmaks\u0131z\u0131n bu servisleri IoC Container’a provide ediyor olsayd\u0131k a\u015fa\u011f\u0131daki gibi bir \u00e7al\u0131\u015fma yap\u0131lmas\u0131 gerekiyor olacakt\u0131:<\/p>\n
\n\r\n.\r\n.\r\n.\r\nbuilder.Services.AddSingleton<IPersonService, SalesDepartmentPersonService>();\r\nbuilder.Services.AddSingleton<IPersonService, JobDepartmentPersonService>();\r\nbuilder.Services.AddSingleton<IPersonService, AccountingDepartmentPersonService>();\r\n.\r\n.\r\n.\r\n<\/pre>\n<\/div>\nTabi bu \u015fekilde birden fazla ayn\u0131 service type’a kar\u015f\u0131l\u0131k gelen provide yap\u0131land\u0131rmalar\u0131nda, yap\u0131lacak inject’e her daim sonuncu tan\u0131mlanan t\u00fcr\u00fcn instance’\u0131 g\u00f6nderilecektir. Yani a\u015fa\u011f\u0131daki \u00f6rne\u011fi ele al\u0131rsak e\u011fer;<\/p>\n
\n\r\napp.MapGet("\/", (IPersonService personService) =>\r\n{\r\n    ...\r\n});\r\n<\/pre>\n<\/div>\n‘personService’ referans\u0131na ‘AccountingDepartmentPersonService’ t\u00fcr\u00fcnden bir nesne g\u00f6nderilmi\u015f olacakt\u0131r.<\/p>\n
Ee peki hoca, ben ‘IPersonService’ referans\u0131na kar\u015f\u0131l\u0131k ‘SalesDepartmentPersonService’ veya ‘JobDepartmentPersonService’ nesnelerini nas\u0131l elde edebilirim?<\/strong><\/em><\/p>\n
Keyed service \u00f6zelli\u011finden \u00f6nce ayn\u0131 referansa kar\u015f\u0131l\u0131k provide edilmi\u015f instance’lardan istedi\u011fimizi alman\u0131n pekte basit bir yolu oldu\u011funu s\u00f6yleyemem. Burada yap\u0131lmas\u0131 gereken bu nesneleri farkl\u0131 referanslarla i\u015faretleyebilmek i\u00e7in hususi interface’lerin implemente edilmesi ve bu interface’ler \u00fczerinden provide edilmesi uygulayabilece\u011fimiz esas \u00e7\u00f6z\u00fcmlerden birisidir diyebilirim.<\/p>\n
Ya da anlayaca\u011f\u0131n\u0131z \u00fczere bu ihtiyac\u0131 .NET 8 ile gelmi\u015f olan keyed service \u00f6zelli\u011fiyle de rahatl\u0131kla \u00e7\u00f6z\u00fcmleyebiliriz. Bunun i\u00e7in ‘AddKeyed…’ fonksiyonlar\u0131n\u0131 a\u015fa\u011f\u0131daki gibi kullanmak yeterlidir;<\/p>\n
\n\r\n.\r\n.\r\n.\r\nbuilder.Services.AddKeyedSingleton<IPersonService, SalesDepartmentPersonService>("sales");\r\nbuilder.Services.AddKeyedSingleton<IPersonService, JobDepartmentPersonService>("job");\r\nbuilder.Services.AddKeyedSingleton<IPersonService, AccountingDepartmentPersonService>("accounting");\r\n.\r\n.\r\n.\r\n<\/pre>\n<\/div>\nG\u00f6r\u00fcld\u00fc\u011f\u00fc \u00fczere, keyed service \u00f6zelli\u011fi ayn\u0131 service type’a kar\u015f\u0131l\u0131k provide edilmi\u015f olan instance’lar\u0131 bu sefer de vermi\u015f oldu\u011fumuz key’ler \u00fczerinden ay\u0131rmam\u0131z\u0131 sa\u011flayan bir niteli\u011fe sahiptir. Tabi bu \u00f6zelli\u011fi illaki bir service type’a kar\u015f\u0131n \u00e7oklu provide durumlar\u0131nda tercih edece\u011fiz diye bir kaide yok. Yap\u0131n\u0131n niteli\u011fine vak\u0131f oldu\u011funuz taktirde istedi\u011finiz her noktada g\u00f6n\u00fcl rahatl\u0131\u011f\u0131yla kullanabilirsiniz.<\/p>\n
Keyed service \u00f6zelli\u011fi ile provide edilmi\u015f olan servisleri inject edebilmek i\u00e7in FromKeyedServices<\/code> attribute’undan a\u015fa\u011f\u0131daki gibi istifade edebiliriz.<\/p>\n
\n\r\n.\r\n.\r\n.\r\napp.MapGet("\/", ([FromKeyedServices("sales")] IPersonService personService) =>\r\n{\r\n    ...\r\n});\r\n.\r\n.\r\n.\r\n<\/pre>\n<\/div>\nYa da ‘IServiceProvider’ \u00fczerinden de IoC container’dan talepte bulunabiliriz.<\/p>\n
\n\r\n.\r\n.\r\n.\r\napp.MapGet("\/", (IServiceProvider keyedServiceProvider) =>\r\n{\r\n    var personService = keyedServiceProvider.GetRequiredKeyedService<IPersonService>("accounting");\r\n    return personService.GetPersonType;\r\n});\r\n.\r\n.\r\n.\r\n<\/pre>\n<\/div>\nAnlayaca\u011f\u0131n\u0131z, keyed service \u00f6zelli\u011fi esas\u0131nda non-keyed service’lerle ayn\u0131 \u015fekilde \u00e7al\u0131\u015fmakta, tek fark container’da ki servislerin tan\u0131mlanmas\u0131ndad\u0131r. Yani non-keyed service’ler sadece service type ile provide edilirken, keyed service’ler ise service type e\u015fli\u011finde service key ile birlikte tan\u0131mlanmaktad\u0131rlar. Ha e\u011fer ki gidip birden fazla provide’\u0131 ayn\u0131 keyed service \u00f6zelli\u011fiyle kaydederseniz bu durumda da non-keyed service’ler de oldu\u011fu gibi sonuncu olarak provide edilen instance’\u0131n gelece\u011fini bilmenizde fayda vard\u0131r.<\/p>\n
Nihai olarak,
\nKeyed service \u00f6zelli\u011fi inceledi\u011fimiz \u00fczere IoC container’daki kimi durumlara kar\u015f\u0131n davran\u0131\u015flar\u0131m\u0131z\u0131 basite indirgemekte ve dependency injection a\u00e7\u0131s\u0131ndan farkl\u0131 bir yakla\u015f\u0131m sergileyebilmemize olanak tan\u0131maktad\u0131r. Ha \u00e7ok mu gerekli bir yap\u0131lanmayd\u0131 diye sorarsan\u0131z kesinlikle olmad\u0131klar\u0131 konusunda hemfikiriz diyebilirim \ud83d\ude42 O y\u00fczden s\u0131rf var olduklar\u0131 i\u00e7in kullanma mecburiyetinde oldu\u011funuzu d\u00fc\u015f\u00fcnmeyin.<\/p>\n
\u0130lgilenenlerin faydalanmas\u0131 dile\u011fiyle…
\nSonraki yaz\u0131lar\u0131mda g\u00f6r\u00fc\u015fmek \u00fczere…
\n\u0130yi \u00e7al\u0131\u015fmalar…<\/p>\n","protected":false},"excerpt":{"rendered":"
Merhaba, Bu i\u00e7eri\u011fimizde .NET 8 ile IoC container’a gelen keyed service \u00f6zelli\u011fini inceleyecek, nas\u0131l ve ne zaman kullan\u0131lmalar\u0131 gerekti\u011fini, olay\u0131n perde arkas\u0131n\u0131 masaya yat\u0131rarak bol isti\u015fare e\u015fli\u011finde de\u011ferlendirece\u011fiz. O halde buyurun ba\u015flayal\u0131m… Keyed Service...<\/p>\n","protected":false},"author":1,"featured_media":26539,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4912],"tags":[4915,4955,4953,946,4952,4954],"class_list":["post-26663","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-net-8","tag-net-8","tag-net-8-dependency-injection","tag-net-8-keyed-service","tag-dependency-injection","tag-keyed-service","tag-keyed-service-dependency-injection"],"amp_enabled":true,"_links":{"self":[{"href":"https:\/\/www.gencayyildiz.com\/blog\/wp-json\/wp\/v2\/posts\/26663","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.gencayyildiz.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.gencayyildiz.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.gencayyildiz.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.gencayyildiz.com\/blog\/wp-json\/wp\/v2\/comments?post=26663"}],"version-history":[{"count":7,"href":"https:\/\/www.gencayyildiz.com\/blog\/wp-json\/wp\/v2\/posts\/26663\/revisions"}],"predecessor-version":[{"id":26670,"href":"https:\/\/www.gencayyildiz.com\/blog\/wp-json\/wp\/v2\/posts\/26663\/revisions\/26670"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.gencayyildiz.com\/blog\/wp-json\/wp\/v2\/media\/26539"}],"wp:attachment":[{"href":"https:\/\/www.gencayyildiz.com\/blog\/wp-json\/wp\/v2\/media?parent=26663"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.gencayyildiz.com\/blog\/wp-json\/wp\/v2\/categories?post=26663"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.gencayyildiz.com\/blog\/wp-json\/wp\/v2\/tags?post=26663"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}