{"id":14846,"date":"2025-03-11T09:00:18","date_gmt":"2025-03-11T06:00:18","guid":{"rendered":"https:\/\/fatihsoysal.com\/blog\/singleton-tasarim-deseninin-tek-basina-hikayesi\/"},"modified":"2025-03-11T09:00:18","modified_gmt":"2025-03-11T06:00:18","slug":"singleton-tasarim-deseninin-tek-basina-hikayesi","status":"publish","type":"post","link":"https:\/\/fatihsoysal.com\/blog\/singleton-tasarim-deseninin-tek-basina-hikayesi\/","title":{"rendered":"Singleton Tasar\u0131m Deseninin Tek Ba\u015f\u0131na Hikayesi"},"content":{"rendered":"<p><body><\/p>\n<p>Singleton Tasar\u0131m Deseninin Tek Ba\u015f\u0131na Hikayesi<\/p>\n<p>Yaz\u0131l\u0131m d\u00fcnyas\u0131nda s\u0131k\u00e7a kar\u015f\u0131la\u015ft\u0131\u011f\u0131m\u0131z tasar\u0131m desenlerinden biri de Singleton deseni.  Ad\u0131ndan da anla\u015f\u0131laca\u011f\u0131 \u00fczere, bu desenin amac\u0131 bir s\u0131n\u0131ftan sadece tek bir \u00f6rnek olu\u015fturmay\u0131 garanti etmektir.  Bu durum, baz\u0131 \u00f6zel durumlarda olduk\u00e7a faydal\u0131 olsa da,  ayn\u0131 zamanda baz\u0131 dezavantajlar\u0131 da beraberinde getirir.  Bu makalede, Singleton desenini detayl\u0131 bir \u015fekilde inceleyece\u011fiz;  ne zaman kullan\u0131lmas\u0131 gerekti\u011fini, avantajlar\u0131n\u0131 ve dezavantajlar\u0131n\u0131 ele alaca\u011f\u0131z. Ayr\u0131ca,  pratik \u00f6rneklerle deseni daha iyi kavraman\u0131z\u0131 sa\u011flayaca\u011f\u0131z.<\/p>\n<h2>Singleton Deseninin Amac\u0131<\/h2>\n<p>Singleton deseninin temel amac\u0131,  bir s\u0131n\u0131ftan yaln\u0131zca bir nesne olu\u015fturulmas\u0131n\u0131 sa\u011flamakt\u0131r.  Bu, kaynaklar\u0131 payla\u015fmak,  sistemde bir tek kontrol noktas\u0131 olu\u015fturmak veya  belirli bir kayna\u011fa tek bir eri\u015fim noktas\u0131 sa\u011flamak gibi durumlarda olduk\u00e7a kullan\u0131\u015fl\u0131d\u0131r.  \u00d6rne\u011fin, bir veritaban\u0131 ba\u011flant\u0131s\u0131 y\u00f6neticisi veya bir yazd\u0131rma servisi gibi sistem kaynaklar\u0131 i\u00e7in Singleton desenini kullanabiliriz.  Bu sayede,  ayn\u0131 anda birden fazla ba\u011flant\u0131 veya yazd\u0131rma i\u015flemi yapma riskini ortadan kald\u0131rm\u0131\u015f oluruz.  Ancak,  bu kullan\u0131m \u015feklinin karma\u015f\u0131kl\u0131k ve test edilebilirlik gibi olumsuz y\u00f6nleri de bulunmaktad\u0131r.<\/p>\n<h2>Singleton Deseninin Uygulamas\u0131<\/h2>\n<p>Singleton desenini uygulamak i\u00e7in \u00e7e\u015fitli y\u00f6ntemler mevcuttur.  En yayg\u0131n y\u00f6ntemlerden biri,  s\u0131n\u0131f\u0131n yap\u0131c\u0131s\u0131n\u0131 \u00f6zel olarak tan\u0131mlay\u0131p,  bir statik y\u00f6ntem arac\u0131l\u0131\u011f\u0131yla tek \u00f6rne\u011fe eri\u015fim sa\u011flamakt\u0131r.  \u0130\u015fte basit bir Java \u00f6rne\u011fi:<\/p>\n<pre><code class=\"language-java\">\npublic class Singleton {\n    private static Singleton instance;\n\n    private Singleton() {}\n\n    public static Singleton getInstance() {\n        if (instance == null) {\n            instance = new Singleton();\n        }\n        return instance;\n    }\n}\n<\/code><\/pre>\n<p>Bu \u00f6rnekte,  <code>getInstance()<\/code> metodu,  e\u011fer bir \u00f6rnek olu\u015fturulmam\u0131\u015fsa olu\u015fturur ve her \u00e7a\u011fr\u0131da ayn\u0131 \u00f6rne\u011fi d\u00f6nd\u00fcr\u00fcr.  Bu basit yakla\u015f\u0131m\u0131n dezavantajlar\u0131 ise,  \u00e7oklu thread ortamlar\u0131nda yar\u0131\u015f ko\u015fullar\u0131na yol a\u00e7abilmesidir.  Bu sorunun \u00fcstesinden gelmek i\u00e7in,  Java&#8217;n\u0131n <code>synchronized<\/code> anahtar kelimesi veya daha geli\u015fmi\u015f teknikler kullan\u0131labilir.<\/p>\n<h2>Singleton Deseninin Avantajlar\u0131 ve Dezavantajlar\u0131<\/h2>\n<h3>Avantajlar\u0131:<\/h3>\n<ul>\n<li><strong>Kontrol:<\/strong> S\u0131n\u0131f\u0131n sadece bir \u00f6rne\u011finin olu\u015fturulmas\u0131n\u0131 sa\u011flar, b\u00f6ylece kaynaklar\u0131n kontrol\u00fc kolayla\u015f\u0131r.<\/li>\n<li><strong>Tek Noktadan Eri\u015filebilirlik:<\/strong> Uygulaman\u0131n her yerinden tek bir noktadan eri\u015fim sa\u011flar.<\/li>\n<li><strong>Kaynaklar\u0131n Verimli Kullan\u0131m\u0131:<\/strong>  Tek bir \u00f6rnek olu\u015fturuldu\u011fu i\u00e7in bellek ve di\u011fer kaynaklar verimli kullan\u0131l\u0131r. <\/li>\n<\/ul>\n<h3>Dezavantajlar\u0131:<\/h3>\n<ul>\n<li><strong>Test Edilebilirlik:<\/strong>  Ba\u011f\u0131ml\u0131l\u0131klar\u0131 nedeniyle test etmek zor olabilir.  Mocklama i\u015flemleri daha karma\u015f\u0131k hale gelir.<\/li>\n<li><strong>Esneklik Eksikli\u011fi:<\/strong>  Yeni gereksinimlere uyum sa\u011flamak zor olabilir.  Sistemin di\u011fer b\u00f6l\u00fcmlerine ba\u011f\u0131ml\u0131d\u0131r.<\/li>\n<li><strong>\u00c7oklu Thread Ortamlar\u0131nda Karma\u015f\u0131kl\u0131k:<\/strong> Yar\u0131\u015f ko\u015fullar\u0131na kar\u015f\u0131 dikkatli olmak ve senkronizasyon mekanizmalar\u0131 kullanmak gereklidir.<\/li>\n<li><strong>Geni\u015fleme zorlu\u011fu:<\/strong>  Sistemdeki tek \u00f6rnek,  geni\u015fleme ve iyile\u015ftirme i\u015flemlerini zorla\u015ft\u0131rabilir.<\/li>\n<\/ul>\n<h2>Ne Zaman Singleton Kullan\u0131lmal\u0131?<\/h2>\n<p>Singleton desenini kullanmadan \u00f6nce dikkatlice d\u00fc\u015f\u00fcnmek \u00f6nemlidir.  \u00c7o\u011fu durumda,  daha esnek ve test edilebilir alternatifler mevcuttur.  Singleton,  ger\u00e7ekten tek bir \u00f6rnek gerekli oldu\u011funda, \u00f6rne\u011fin veritaban\u0131 ba\u011flant\u0131s\u0131 y\u00f6neticisi gibi durumlarda kullan\u0131lmal\u0131d\u0131r.  Ancak,  sadece bir s\u0131n\u0131f\u0131 global olarak eri\u015filebilir hale getirmek i\u00e7in Singleton kullanmak genellikle k\u00f6t\u00fc bir uygulamad\u0131r.<\/p>\n<h2>Sonu\u00e7<\/h2>\n<p>Singleton tasar\u0131m deseni,  baz\u0131 durumlarda olduk\u00e7a kullan\u0131\u015fl\u0131 bir desen olsa da,  dezavantajlar\u0131n\u0131 da g\u00f6z \u00f6n\u00fcnde bulundurmak \u00f6nemlidir.  Uygun \u015fekilde kullan\u0131lmad\u0131\u011f\u0131nda,  sistem karma\u015f\u0131kl\u0131\u011f\u0131n\u0131 art\u0131rabilir ve test edilebilirli\u011fi azaltabilir.  Bu nedenle,  Singleton desenini kullanmadan \u00f6nce,  alternatifleri de\u011ferlendirmek ve gereksinimleri dikkatlice analiz etmek \u00f6nemlidir. Daha fazla bilgi i\u00e7in <a href=\"https:\/\/fatihsoysal.com\">fatihsoysal.com<\/a> adresini ziyaret edebilirsiniz.<\/p>\n<p>Ba\u015fka faydal\u0131 kaynaklar i\u00e7in \u015fu ba\u011flant\u0131lara g\u00f6z atabilirsiniz: <a href=\"https:\/\/dev.to\/zand\/singleton-pattern-the-lonely-chapter-of-design-patterns-14kn\">Singleton Pattern &#8211; dev.to<\/a><\/p>\n<h3>#Etiketler<\/h3>\n<p>#Singleton #Tasar\u0131mDeseni #Yaz\u0131l\u0131mGeli\u015ftirme #Programlama #OOP #Tekli\u00d6rnekleme #Avantajlar #Dezavantajlar #Java #DesignPatterns<\/p>\n<p><\/body><br \/>\n<\/html><\/p>\n","protected":false},"excerpt":{"rendered":"Singleton Tasar\u0131m Deseninin Tek Ba\u015f\u0131na Hikayesi Yaz\u0131l\u0131m d\u00fcnyas\u0131nda s\u0131k\u00e7a kar\u015f\u0131la\u015ft\u0131\u011f\u0131m\u0131z tasar\u0131m desenlerinden biri de Singleton deseni. Ad\u0131ndan da&hellip;","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"csco_page_header_type":"","csco_page_load_nextpost":"","csco_page_subscribe_form":"","csco_page_contact_form":"","footnotes":""},"categories":[1],"tags":[],"class_list":{"0":"post-14846","1":"post","2":"type-post","3":"status-publish","4":"format-standard","6":"category-genel","7":"cs-entry","8":"cs-video-wrap"},"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v20.5 (Yoast SEO v25.3.1) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Singleton Tasar\u0131m Deseninin Tek Ba\u015f\u0131na Hikayesi<\/title>\n<meta name=\"description\" content=\"Yaz\u0131l\u0131m d\u00fcnyas\u0131nda s\u0131k\u00e7a kar\u015f\u0131la\u015ft\u0131\u011f\u0131m\u0131z tasar\u0131m desenlerinden biri de Singleton deseni. Ad\u0131ndan da anla\u015f\u0131laca\u011f\u0131 \u00fczere, bu desenin amac\u0131 bir s\u0131n\u0131ftan sadece tek bir \u00f6rnek olu\u015fturmay\u0131 garanti etmektir. Bu durum, baz\u0131 \u00f6zel durumlarda olduk\u00e7a faydal\u0131 olsa da, ayn\u0131 zamanda baz\u0131 dezavantajlar\u0131 da beraberinde getirir. Bu makalede, Singleton desenini detayl\u0131 bir \u015fekilde inceleyece\u011fiz; ne zaman kullan\u0131lmas\u0131 gerekti\u011fini, avantajlar\u0131n\u0131 ve dezavantajlar\u0131n\u0131 ele alaca\u011f\u0131z. 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Bu durum, baz\u0131 \u00f6zel durumlarda olduk\u00e7a faydal\u0131 olsa da, ayn\u0131 zamanda baz\u0131 dezavantajlar\u0131 da beraberinde getirir. Bu makalede, Singleton desenini detayl\u0131 bir \u015fekilde inceleyece\u011fiz; ne zaman kullan\u0131lmas\u0131 gerekti\u011fini, avantajlar\u0131n\u0131 ve dezavantajlar\u0131n\u0131 ele alaca\u011f\u0131z. Ayr\u0131ca, pratik \u00f6rneklerle deseni daha iyi kavraman\u0131z\u0131 sa\u011flayaca\u011f\u0131z.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/fatihsoysal.com\/blog\/singleton-tasarim-deseninin-tek-basina-hikayesi\/\" \/>\n<meta property=\"og:site_name\" content=\"Kodlar\u0131n Gizemli D\u00fcnyas\u0131\" \/>\n<meta property=\"article:published_time\" content=\"2025-03-11T06:00:18+00:00\" \/>\n<meta name=\"author\" content=\"Fatih Soysal\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Yazan:\" \/>\n\t<meta name=\"twitter:data1\" content=\"Fatih Soysal\" \/>\n\t<meta name=\"twitter:label2\" content=\"Tahmini okuma s\u00fcresi\" \/>\n\t<meta name=\"twitter:data2\" content=\"3 dakika\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\/\/fatihsoysal.com\/blog\/singleton-tasarim-deseninin-tek-basina-hikayesi\/#article\",\"isPartOf\":{\"@id\":\"https:\/\/fatihsoysal.com\/blog\/singleton-tasarim-deseninin-tek-basina-hikayesi\/\"},\"author\":{\"name\":\"Fatih Soysal\",\"@id\":\"https:\/\/fatihsoysal.com\/blog\/#\/schema\/person\/002a254750921dcfd568a99e48240dd1\"},\"headline\":\"Singleton Tasar\u0131m Deseninin Tek Ba\u015f\u0131na Hikayesi\",\"datePublished\":\"2025-03-11T06:00:18+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/fatihsoysal.com\/blog\/singleton-tasarim-deseninin-tek-basina-hikayesi\/\"},\"wordCount\":641,\"commentCount\":0,\"publisher\":{\"@id\":\"https:\/\/fatihsoysal.com\/blog\/#\/schema\/person\/002a254750921dcfd568a99e48240dd1\"},\"inLanguage\":\"tr\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\/\/fatihsoysal.com\/blog\/singleton-tasarim-deseninin-tek-basina-hikayesi\/#respond\"]}],\"copyrightYear\":\"2025\",\"copyrightHolder\":{\"@id\":\"https:\/\/fatihsoysal.com\/blog\/#organization\"}},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/fatihsoysal.com\/blog\/singleton-tasarim-deseninin-tek-basina-hikayesi\/\",\"url\":\"https:\/\/fatihsoysal.com\/blog\/singleton-tasarim-deseninin-tek-basina-hikayesi\/\",\"name\":\"Singleton Tasar\u0131m Deseninin Tek Ba\u015f\u0131na Hikayesi\",\"isPartOf\":{\"@id\":\"https:\/\/fatihsoysal.com\/blog\/#website\"},\"datePublished\":\"2025-03-11T06:00:18+00:00\",\"description\":\"Yaz\u0131l\u0131m d\u00fcnyas\u0131nda s\u0131k\u00e7a kar\u015f\u0131la\u015ft\u0131\u011f\u0131m\u0131z tasar\u0131m desenlerinden biri de Singleton deseni. Ad\u0131ndan da anla\u015f\u0131laca\u011f\u0131 \u00fczere, bu desenin amac\u0131 bir s\u0131n\u0131ftan sadece tek bir \u00f6rnek olu\u015fturmay\u0131 garanti etmektir. Bu durum, baz\u0131 \u00f6zel durumlarda olduk\u00e7a faydal\u0131 olsa da, ayn\u0131 zamanda baz\u0131 dezavantajlar\u0131 da beraberinde getirir. Bu makalede, Singleton desenini detayl\u0131 bir \u015fekilde inceleyece\u011fiz; ne zaman kullan\u0131lmas\u0131 gerekti\u011fini, avantajlar\u0131n\u0131 ve dezavantajlar\u0131n\u0131 ele alaca\u011f\u0131z. 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Ad\u0131ndan da anla\u015f\u0131laca\u011f\u0131 \u00fczere, bu desenin amac\u0131 bir s\u0131n\u0131ftan sadece tek bir \u00f6rnek olu\u015fturmay\u0131 garanti etmektir. Bu durum, baz\u0131 \u00f6zel durumlarda olduk\u00e7a faydal\u0131 olsa da, ayn\u0131 zamanda baz\u0131 dezavantajlar\u0131 da beraberinde getirir. Bu makalede, Singleton desenini detayl\u0131 bir \u015fekilde inceleyece\u011fiz; ne zaman kullan\u0131lmas\u0131 gerekti\u011fini, avantajlar\u0131n\u0131 ve dezavantajlar\u0131n\u0131 ele alaca\u011f\u0131z. Ayr\u0131ca, pratik \u00f6rneklerle deseni daha iyi kavraman\u0131z\u0131 sa\u011flayaca\u011f\u0131z.","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/fatihsoysal.com\/blog\/singleton-tasarim-deseninin-tek-basina-hikayesi\/","og_locale":"tr_TR","og_type":"article","og_title":"Singleton Tasar\u0131m Deseninin Tek Ba\u015f\u0131na Hikayesi","og_description":"Yaz\u0131l\u0131m d\u00fcnyas\u0131nda s\u0131k\u00e7a kar\u015f\u0131la\u015ft\u0131\u011f\u0131m\u0131z tasar\u0131m desenlerinden biri de Singleton deseni. Ad\u0131ndan da anla\u015f\u0131laca\u011f\u0131 \u00fczere, bu desenin amac\u0131 bir s\u0131n\u0131ftan sadece tek bir \u00f6rnek olu\u015fturmay\u0131 garanti etmektir. Bu durum, baz\u0131 \u00f6zel durumlarda olduk\u00e7a faydal\u0131 olsa da, ayn\u0131 zamanda baz\u0131 dezavantajlar\u0131 da beraberinde getirir. Bu makalede, Singleton desenini detayl\u0131 bir \u015fekilde inceleyece\u011fiz; ne zaman kullan\u0131lmas\u0131 gerekti\u011fini, avantajlar\u0131n\u0131 ve dezavantajlar\u0131n\u0131 ele alaca\u011f\u0131z. 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