{"id":7588,"date":"2024-12-25T00:30:11","date_gmt":"2024-12-24T21:30:11","guid":{"rendered":"https:\/\/fatihsoysal.com\/blog\/singleton-tasarim-desenini-ogrenme-tek-bir-ornek-sonsuz-olanak\/"},"modified":"2024-12-25T00:30:11","modified_gmt":"2024-12-24T21:30:11","slug":"singleton-tasarim-desenini-ogrenme-tek-bir-ornek-sonsuz-olanak","status":"publish","type":"post","link":"https:\/\/fatihsoysal.com\/blog\/singleton-tasarim-desenini-ogrenme-tek-bir-ornek-sonsuz-olanak\/","title":{"rendered":"Singleton Tasar\u0131m Desenini \u00d6\u011frenme: Tek Bir \u00d6rnek, Sonsuz Olanak"},"content":{"rendered":"<p><body><\/p>\n<p>Singleton Tasar\u0131m Desenini \u00d6\u011frenme: Tek Bir \u00d6rnek, Sonsuz Olanak<\/p>\n<p>Merhaba! Fatih Soysal olarak, bug\u00fcn sizlere yaz\u0131l\u0131m d\u00fcnyas\u0131n\u0131n en pop\u00fcler tasar\u0131m desenlerinden biri olan Singleton tasar\u0131m desenini detayl\u0131 bir \u015fekilde anlataca\u011f\u0131m.  Bu desen, uygulaman\u0131zda sadece bir kez \u00f6rne\u011fi olu\u015fturulabilen s\u0131n\u0131flar olu\u015fturman\u0131za olanak tan\u0131r.  \u00d6ncelikle, ne zaman Singleton desenini kullanman\u0131z gerekti\u011fini ve nas\u0131l uygulayabilece\u011finizi \u00f6\u011frenece\u011fiz. Ard\u0131ndan, farkl\u0131 programlama dillerinde \u00f6rneklerle bu deseni peki\u015ftirece\u011fiz.<\/p>\n<h2>Singleton Tasar\u0131m Deseni Nedir?<\/h2>\n<p>Singleton deseni, bir s\u0131n\u0131f\u0131n sadece bir \u00f6rne\u011finin olu\u015fturulmas\u0131n\u0131 sa\u011flayan ve bu \u00f6rne\u011fe global bir eri\u015fim noktas\u0131 sunan bir tasar\u0131m desenidir.  Ba\u015fka bir deyi\u015fle, bu desen sayesinde, s\u0131n\u0131f\u0131n\u0131zdan yaln\u0131zca bir nesne olu\u015fturabilirsiniz. Bu durum, baz\u0131 durumlarda sistem kaynaklar\u0131n\u0131n daha verimli kullan\u0131lmas\u0131n\u0131 ve veri tutarl\u0131l\u0131\u011f\u0131n\u0131n sa\u011flanmas\u0131n\u0131 sa\u011flar.  \u00d6rne\u011fin, bir veritaban\u0131 ba\u011flant\u0131s\u0131 y\u00f6netimi veya bir yazd\u0131rma hizmeti gibi, uygulaman\u0131zda sadece bir kez kullan\u0131lmas\u0131 gereken kaynaklar i\u00e7in ideal bir \u00e7\u00f6z\u00fcmd\u00fcr.  Bu deseni do\u011fru bir \u015fekilde kullanmak, kodunuzun daha okunabilir ve s\u00fcrd\u00fcr\u00fclebilir olmas\u0131na yard\u0131mc\u0131 olur.<\/p>\n<h2>Ne Zaman Singleton Kullanmal\u0131s\u0131n\u0131z?<\/h2>\n<p>Singleton tasar\u0131m deseni her zaman en uygun \u00e7\u00f6z\u00fcm olmayabilir.  \u00d6rne\u011fin, nesnenin durumunu de\u011fi\u015ftirmeniz gerekiyorsa, Singleton tasar\u0131m deseni karma\u015f\u0131kl\u0131k getirebilir.  Ancak, a\u015fa\u011f\u0131daki durumlarda Singleton&#8217;\u0131 d\u00fc\u015f\u00fcnmeniz faydal\u0131 olabilir:<\/p>\n<ul>\n<li>S\u0131n\u0131f\u0131n\u0131z\u0131n sadece bir \u00f6rne\u011finin olmas\u0131 gerekti\u011finde (\u00f6rne\u011fin, bir loglama hizmeti).<\/li>\n<li>Global bir eri\u015fim noktas\u0131na ihtiya\u00e7 duydu\u011funuzda.<\/li>\n<li>Sistem kaynaklar\u0131n\u0131n verimli kullan\u0131lmas\u0131n\u0131 sa\u011flamak istedi\u011finizde.<\/li>\n<\/ul>\n<h2>Singleton Tasar\u0131m Deseninin Uygulamas\u0131<\/h2>\n<p>Singleton deseninin uygulamas\u0131, se\u00e7ti\u011finiz programlama diline ba\u011fl\u0131 olarak farkl\u0131l\u0131k g\u00f6sterebilir. Ancak temel prensipler ayn\u0131d\u0131r:  s\u0131n\u0131f\u0131n yap\u0131c\u0131s\u0131n\u0131n \u00f6zel olmas\u0131 ve s\u0131n\u0131f\u0131n tek bir \u00f6rne\u011fini tutan bir statik \u00fcye de\u011fi\u015fkeni ve bu \u00f6rne\u011fi d\u00f6nd\u00fcren bir statik y\u00f6ntem kullan\u0131lmas\u0131 gerekir.  \u0130\u015fte Java&#8217;da basit bir Singleton \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, Singleton s\u0131n\u0131f\u0131n\u0131n \u00f6rne\u011fi zaten olu\u015fturulmu\u015fsa mevcut \u00f6rne\u011fi, olu\u015fturulmam\u0131\u015fsa yeni bir \u00f6rnek olu\u015fturarak d\u00f6nd\u00fcr\u00fcr.  Bu yakla\u015f\u0131m, thread-safe de\u011fildir. \u00c7ok i\u015f par\u00e7ac\u0131kl\u0131 ortamlarda daha geli\u015fmi\u015f teknikler kullanman\u0131z gerekebilir.  \u00d6rne\u011fin, double-checked locking gibi teknikleri ara\u015ft\u0131rman\u0131z faydal\u0131 olabilir.<\/p>\n<h2>Singleton ve Di\u011fer Tasar\u0131m Desenleri<\/h2>\n<p>Singleton, di\u011fer tasar\u0131m desenleriyle birlikte kullan\u0131labilir. \u00d6rne\u011fin, Factory metodu ile birle\u015ftirilerek, Singleton \u00f6rne\u011finin olu\u015fturulmas\u0131 daha esnek hale getirilebilir.  Ayr\u0131ca, bu desen,  Observer deseniyle birlikte kullan\u0131larak, Singleton \u00f6rne\u011findeki de\u011fi\u015fikliklerin di\u011fer nesnelere bildirilmesini sa\u011flayabilirsiniz.  Bu konulara  daha sonraki makalelerimde detayl\u0131 olarak de\u011finece\u011fim.  <a href=\"https:\/\/fatihsoysal.com\">Web sitemi<\/a> ziyaret ederek di\u011fer makalelerime ula\u015fabilirsiniz.<\/p>\n<h2>Sonu\u00e7<\/h2>\n<p>Singleton tasar\u0131m deseni, do\u011fru kullan\u0131ld\u0131\u011f\u0131nda, kodunuzun daha okunabilir, s\u00fcrd\u00fcr\u00fclebilir ve verimli olmas\u0131na yard\u0131mc\u0131 olabilir. Ancak, her zaman en uygun \u00e7\u00f6z\u00fcm olmad\u0131\u011f\u0131n\u0131 unutmamak \u00f6nemlidir.  Uygulaman\u0131z\u0131n ihtiya\u00e7lar\u0131n\u0131 dikkatlice de\u011ferlendirmeniz ve do\u011fru tasar\u0131m desenini se\u00e7meniz gerekir.  Umar\u0131m bu makale, Singleton tasar\u0131m desenini anlaman\u0131za yard\u0131mc\u0131 olmu\u015ftur.  Ba\u015fka sorular\u0131n\u0131z varsa, l\u00fctfen yorumlarda belirtin!<\/p>\n<p>Faydal\u0131 bulaca\u011f\u0131n\u0131z bir kaynak: <a href=\"https:\/\/sourcemaking.com\/design_patterns\/singleton\">SourceMaking Singleton<\/a> <\/p>\n<p>#Etiketler: Singleton, Tasar\u0131m Deseni, Yaz\u0131l\u0131m Geli\u015ftirme, Programlama, OOP, \u00d6rnekler, Java, Python, Thread-safe,  Double-Checked Locking, Factory Metodu, Observer Deseni<\/p>\n<p><\/body><br \/>\n<\/html><\/p>\n","protected":false},"excerpt":{"rendered":"Singleton Tasar\u0131m Desenini \u00d6\u011frenme: Tek Bir \u00d6rnek, Sonsuz Olanak Merhaba! Fatih Soysal olarak, bug\u00fcn sizlere yaz\u0131l\u0131m d\u00fcnyas\u0131n\u0131n en&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-7588","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 Desenini \u00d6\u011frenme: Tek Bir \u00d6rnek, Sonsuz Olanak<\/title>\n<meta name=\"description\" content=\"Merhaba! Fatih Soysal olarak, bug\u00fcn sizlere yaz\u0131l\u0131m d\u00fcnyas\u0131n\u0131n en pop\u00fcler tasar\u0131m desenlerinden biri olan Singleton tasar\u0131m desenini detayl\u0131 bir \u015fekilde anlataca\u011f\u0131m. Bu desen, uygulaman\u0131zda sadece bir kez \u00f6rne\u011fi olu\u015fturulabilen s\u0131n\u0131flar olu\u015fturman\u0131za olanak tan\u0131r. \u00d6ncelikle, ne zaman Singleton desenini kullanman\u0131z gerekti\u011fini ve nas\u0131l uygulayabilece\u011finizi \u00f6\u011frenece\u011fiz. Ard\u0131ndan, farkl\u0131 programlama dillerinde \u00f6rneklerle bu deseni peki\u015ftirece\u011fiz.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/fatihsoysal.com\/blog\/singleton-tasarim-desenini-ogrenme-tek-bir-ornek-sonsuz-olanak\/\" \/>\n<meta property=\"og:locale\" content=\"tr_TR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Singleton Tasar\u0131m Desenini \u00d6\u011frenme: Tek Bir \u00d6rnek, Sonsuz Olanak\" \/>\n<meta property=\"og:description\" content=\"Merhaba! Fatih Soysal olarak, bug\u00fcn sizlere yaz\u0131l\u0131m d\u00fcnyas\u0131n\u0131n en pop\u00fcler tasar\u0131m desenlerinden biri olan Singleton tasar\u0131m desenini detayl\u0131 bir \u015fekilde anlataca\u011f\u0131m. Bu desen, uygulaman\u0131zda sadece bir kez \u00f6rne\u011fi olu\u015fturulabilen s\u0131n\u0131flar olu\u015fturman\u0131za olanak tan\u0131r. \u00d6ncelikle, ne zaman Singleton desenini kullanman\u0131z gerekti\u011fini ve nas\u0131l uygulayabilece\u011finizi \u00f6\u011frenece\u011fiz. 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Fatih Soysal olarak, bug\u00fcn sizlere yaz\u0131l\u0131m d\u00fcnyas\u0131n\u0131n en pop\u00fcler tasar\u0131m desenlerinden biri olan Singleton tasar\u0131m desenini detayl\u0131 bir \u015fekilde anlataca\u011f\u0131m. Bu desen, uygulaman\u0131zda sadece bir kez \u00f6rne\u011fi olu\u015fturulabilen s\u0131n\u0131flar olu\u015fturman\u0131za olanak tan\u0131r. \u00d6ncelikle, ne zaman Singleton desenini kullanman\u0131z gerekti\u011fini ve nas\u0131l uygulayabilece\u011finizi \u00f6\u011frenece\u011fiz. 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Fatih Soysal olarak, bug\u00fcn sizlere yaz\u0131l\u0131m d\u00fcnyas\u0131n\u0131n en pop\u00fcler tasar\u0131m desenlerinden biri olan Singleton tasar\u0131m desenini detayl\u0131 bir \u015fekilde anlataca\u011f\u0131m. Bu desen, uygulaman\u0131zda sadece bir kez \u00f6rne\u011fi olu\u015fturulabilen s\u0131n\u0131flar olu\u015fturman\u0131za olanak tan\u0131r. \u00d6ncelikle, ne zaman Singleton desenini kullanman\u0131z gerekti\u011fini ve nas\u0131l uygulayabilece\u011finizi \u00f6\u011frenece\u011fiz. Ard\u0131ndan, farkl\u0131 programlama dillerinde \u00f6rneklerle bu deseni peki\u015ftirece\u011fiz.","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-desenini-ogrenme-tek-bir-ornek-sonsuz-olanak\/","og_locale":"tr_TR","og_type":"article","og_title":"Singleton Tasar\u0131m Desenini \u00d6\u011frenme: Tek Bir \u00d6rnek, Sonsuz Olanak","og_description":"Merhaba! Fatih Soysal olarak, bug\u00fcn sizlere yaz\u0131l\u0131m d\u00fcnyas\u0131n\u0131n en pop\u00fcler tasar\u0131m desenlerinden biri olan Singleton tasar\u0131m desenini detayl\u0131 bir \u015fekilde anlataca\u011f\u0131m. 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