{"id":16397,"date":"2025-03-27T14:15:15","date_gmt":"2025-03-27T11:15:15","guid":{"rendered":"https:\/\/fatihsoysal.com\/blog\/java-coklu-is-parcacikli-uygulamalarda-yogun-bekleme-busy-waiting\/"},"modified":"2025-03-27T14:15:15","modified_gmt":"2025-03-27T11:15:15","slug":"java-coklu-is-parcacikli-uygulamalarda-yogun-bekleme-busy-waiting","status":"publish","type":"post","link":"https:\/\/fatihsoysal.com\/blog\/java-coklu-is-parcacikli-uygulamalarda-yogun-bekleme-busy-waiting\/","title":{"rendered":"Java \u00c7oklu \u0130\u015f Par\u00e7ac\u0131kl\u0131 Uygulamalarda Yo\u011fun Bekleme (Busy Waiting)"},"content":{"rendered":"<p>Java \u00c7oklu \u0130\u015f Par\u00e7ac\u0131kl\u0131 Uygulamalarda Yo\u011fun Bekleme (Busy Waiting)<\/p>\n<p>Merhaba, Fatih Soysal burada. Bu yaz\u0131da, Java \u00e7oklu i\u015f par\u00e7ac\u0131kl\u0131 uygulamalar\u0131nda s\u0131k kar\u015f\u0131la\u015f\u0131lan bir durum olan yo\u011fun bekleme (busy waiting) kavram\u0131n\u0131 detayl\u0131 bir \u015fekilde ele alaca\u011f\u0131z.  Yo\u011fun bekleme, bir i\u015f par\u00e7ac\u0131\u011f\u0131n\u0131n belirli bir ko\u015fulun ger\u00e7ekle\u015fmesini s\u00fcrekli olarak kontrol ederek CPU d\u00f6ng\u00fclerini bo\u015fa harcamas\u0131 anlam\u0131na gelir.  Bu durum, performans sorunlar\u0131na yol a\u00e7abilecek verimsiz bir yakla\u015f\u0131md\u0131r.  Ancak, baz\u0131 \u00f6zel durumlarda avantajl\u0131 olabilmektedir.<\/p>\n<h2>Yo\u011fun Beklemenin Nedenleri ve Zararlar\u0131<\/h2>\n<p>Yo\u011fun beklemenin ba\u015fl\u0131ca nedeni, senkronizasyon mekanizmalar\u0131n\u0131n yanl\u0131\u015f veya verimsiz kullan\u0131m\u0131d\u0131r.  \u00d6rne\u011fin, bir i\u015f par\u00e7ac\u0131\u011f\u0131 ba\u015fka bir i\u015f par\u00e7ac\u0131\u011f\u0131n\u0131n tamamlamas\u0131n\u0131 bekliyorsa ve bunu s\u00fcrekli olarak kontrol ederek yap\u0131yorsa, bu yo\u011fun beklemeye neden olur. Bu durumun en \u00f6nemli zarar\u0131 ise kaynaklar\u0131n israf\u0131d\u0131r.  \u0130\u015f par\u00e7ac\u0131\u011f\u0131, kaynaklar\u0131 (CPU d\u00f6ng\u00fcleri) s\u00fcrekli olarak t\u00fcketir ancak hi\u00e7bir yararl\u0131 i\u015f yapmaz.  Sonu\u00e7 olarak, sistem performans\u0131nda d\u00fc\u015f\u00fc\u015f ve genel olarak uygulama yan\u0131t verme s\u00fcresinde yava\u015flama ya\u015fan\u0131r. Ayr\u0131ca, enerji t\u00fcketimini de art\u0131r\u0131r. <\/p>\n<p>\u00d6rne\u011fin,  bir i\u015f par\u00e7ac\u0131\u011f\u0131, ba\u015fka bir i\u015f par\u00e7ac\u0131\u011f\u0131n\u0131n bir de\u011fi\u015fkeni belirli bir de\u011fere g\u00fcncellemesini bekliyorsa, s\u00fcrekli olarak bu de\u011fi\u015fkenin de\u011ferini kontrol ederek  yo\u011fun bekleme yapar. Bu durumun verimsizli\u011fi olduk\u00e7a a\u00e7\u0131kt\u0131r. Daha verimli bir yakla\u015f\u0131m, Java&#8217;n\u0131n sundu\u011fu senkronizasyon mekanizmalar\u0131 (\u00f6rne\u011fin, <code>wait()<\/code> ve <code>notify()<\/code> metodlar\u0131 veya <code>ReentrantLock<\/code>) kullan\u0131larak uygulanabilir. <\/p>\n<h2>Yo\u011fun Bekleme \u00d6rnekleri<\/h2>\n<p>\u0130\u015fte basit bir yo\u011fun bekleme \u00f6rne\u011fi:<\/p>\n<p>java<br \/>\npublic class BusyWaitingExample {<br \/>\n    private static boolean flag = false;<\/p>\n<p>    public static void main(String[] args) {<br \/>\n        Thread t1 = new Thread(() -> {<br \/>\n            while (!flag) {<br \/>\n                \/\/ Bo\u015f d\u00f6ng\u00fc &#8211; yo\u011fun bekleme<br \/>\n            }<br \/>\n            System.out.println(&#8220;\u0130\u015flem tamamland\u0131!&#8221;);<br \/>\n        });<\/p>\n<p>        t1.start();<\/p>\n<p>        try {<br \/>\n            Thread.sleep(1000); \/\/ 1 saniye bekle<br \/>\n        } catch (InterruptedException e) {<br \/>\n            e.printStackTrace();<br \/>\n        }<\/p>\n<p>        flag = true;<br \/>\n    }<br \/>\n}<\/p>\n<p>Bu \u00f6rnekte, <code>t1<\/code> i\u015f par\u00e7ac\u0131\u011f\u0131 <code>flag<\/code> de\u011fi\u015fkeninin <code>true<\/code> olmas\u0131n\u0131 s\u00fcrekli olarak kontrol eder.  <code>flag<\/code> de\u011fi\u015fkeni <code>true<\/code> olana kadar hi\u00e7bir \u015fey yapmaz. Bu, yo\u011fun beklemeye bir \u00f6rnektir.  <\/p>\n<h2>Alternatifler: Daha Verimli Senkronizasyon<\/h2>\n<p>Yo\u011fun beklemenin olumsuz etkilerinden ka\u00e7\u0131nmak i\u00e7in, Java&#8217;n\u0131n sundu\u011fu senkronizasyon mekanizmalar\u0131n\u0131 kullanmak \u00e7ok daha iyidir.  <code>wait()<\/code> ve <code>notify()<\/code> metodlar\u0131 ile i\u015f par\u00e7ac\u0131klar\u0131, belirli bir ko\u015fulun ger\u00e7ekle\u015fmesini beklemeden uyku moduna ge\u00e7ebilirler. Bu, CPU kaynaklar\u0131n\u0131n daha verimli kullan\u0131lmas\u0131n\u0131 sa\u011flar.   \u00d6rne\u011fin, yukar\u0131daki \u00f6rne\u011fi daha verimli hale getirmek i\u00e7in <code>wait()<\/code> ve <code>notify()<\/code> metodlar\u0131n\u0131 kullanabiliriz:<\/p>\n<p>java<br \/>\npublic class EfficientWaitingExample {<br \/>\n    private static boolean flag = false;<br \/>\n    private static Object lock = new Object();<\/p>\n<p>    public static void main(String[] args) throws InterruptedException{<br \/>\n        Thread t1 = new Thread(() -> {<br \/>\n            synchronized (lock) {<br \/>\n                while (!flag) {<br \/>\n                    try {<br \/>\n                        lock.wait();<br \/>\n                    } catch (InterruptedException e) {<br \/>\n                        e.printStackTrace();<br \/>\n                    }<br \/>\n                }<br \/>\n                System.out.println(&#8220;\u0130\u015flem tamamland\u0131!&#8221;);<br \/>\n            }<br \/>\n        });<\/p>\n<p>        t1.start();<\/p>\n<p>        Thread.sleep(1000);<\/p>\n<p>        synchronized (lock) {<br \/>\n            flag = true;<br \/>\n            lock.notifyAll();<br \/>\n        }<br \/>\n    }<br \/>\n}<\/p>\n<p>Bu \u00f6rnekte, <code>t1<\/code> i\u015f par\u00e7ac\u0131\u011f\u0131, <code>flag<\/code> de\u011fi\u015fkeni <code>true<\/code> olana kadar <code>lock.wait()<\/code> metodu ile uyku moduna ge\u00e7er.  <code>flag<\/code> <code>true<\/code> oldu\u011funda, <code>lock.notifyAll()<\/code> metodu ile uyuyan i\u015f par\u00e7ac\u0131\u011f\u0131 uyand\u0131r\u0131l\u0131r.<\/p>\n<h2>Ne Zaman Yo\u011fun Bekleme Kullan\u0131labilir?<\/h2>\n<p>Yo\u011fun bekleme, baz\u0131 nadir durumlarda kullan\u0131\u015fl\u0131 olabilir.  \u00d6rne\u011fin, \u00e7ok k\u0131sa s\u00fcreli beklemeler veya donan\u0131mla etkile\u015fim gerektiren durumlarda, yo\u011fun bekleme, daha karma\u015f\u0131k senkronizasyon mekanizmalar\u0131na g\u00f6re daha basit ve h\u0131zl\u0131 bir \u00e7\u00f6z\u00fcm olabilir. Ancak, bu durumlar istisnad\u0131r ve genellikle yo\u011fun beklemeden ka\u00e7\u0131n\u0131lmal\u0131d\u0131r.<\/p>\n<p>Sonu\u00e7 olarak, Java \u00e7oklu i\u015f par\u00e7ac\u0131kl\u0131 uygulamalar\u0131nda yo\u011fun beklemeden ka\u00e7\u0131nmak genellikle en iyi yakla\u015f\u0131md\u0131r.  Java&#8217;n\u0131n sundu\u011fu g\u00fc\u00e7l\u00fc senkronizasyon mekanizmalar\u0131, daha verimli ve g\u00fcvenilir bir uygulama geli\u015ftirmenize yard\u0131mc\u0131 olur. Daha fazla bilgi i\u00e7in <a href=\"https:\/\/fatihsoysal.com\">fatihsoysal.com<\/a> adresini ziyaret edebilirsiniz.  Ayr\u0131ca konu ile ilgili daha detayl\u0131 bilgi i\u00e7in <a href=\"https:\/\/docs.oracle.com\/javase\/tutorial\/essential\/concurrency\/index.html\">Oracle Java Concurrency Tutorial<\/a>  sitesine g\u00f6z atabilirsiniz.<\/p>\n<h2>#Etiketler<\/h2>\n<p>#Java #\u00c7oklu\u0130\u015fPar\u00e7ac\u0131\u011f\u0131 #BusyWaiting #Yo\u011funBekleme #Senkronizasyon #Multithreading #Performans #JavaProgramlama #FatihSoysal<\/p>\n","protected":false},"excerpt":{"rendered":"Java \u00c7oklu \u0130\u015f Par\u00e7ac\u0131kl\u0131 Uygulamalarda Yo\u011fun Bekleme (Busy Waiting) Merhaba, Fatih Soysal burada. Bu yaz\u0131da, Java \u00e7oklu i\u015f&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-16397","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>Java \u00c7oklu \u0130\u015f Par\u00e7ac\u0131kl\u0131 Uygulamalarda Yo\u011fun Bekleme (Busy Waiting)<\/title>\n<meta name=\"description\" content=\"Merhaba, Fatih Soysal burada. Bu yaz\u0131da, Java \u00e7oklu i\u015f par\u00e7ac\u0131kl\u0131 uygulamalar\u0131nda s\u0131k kar\u015f\u0131la\u015f\u0131lan bir durum olan yo\u011fun bekleme (busy waiting) kavram\u0131n\u0131 detayl\u0131 bir \u015fekilde ele alaca\u011f\u0131z. Yo\u011fun bekleme, bir i\u015f par\u00e7ac\u0131\u011f\u0131n\u0131n belirli bir ko\u015fulun ger\u00e7ekle\u015fmesini s\u00fcrekli olarak kontrol ederek CPU d\u00f6ng\u00fclerini bo\u015fa harcamas\u0131 anlam\u0131na gelir. Bu durum, performans sorunlar\u0131na yol a\u00e7abilecek verimsiz bir yakla\u015f\u0131md\u0131r. 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Yo\u011fun bekleme, bir i\u015f par\u00e7ac\u0131\u011f\u0131n\u0131n belirli bir ko\u015fulun ger\u00e7ekle\u015fmesini s\u00fcrekli olarak kontrol ederek CPU d\u00f6ng\u00fclerini bo\u015fa harcamas\u0131 anlam\u0131na gelir. Bu durum, performans sorunlar\u0131na yol a\u00e7abilecek verimsiz bir yakla\u015f\u0131md\u0131r. 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Bu yaz\u0131da, Java \u00e7oklu i\u015f par\u00e7ac\u0131kl\u0131 uygulamalar\u0131nda s\u0131k kar\u015f\u0131la\u015f\u0131lan bir durum olan yo\u011fun bekleme (busy waiting) kavram\u0131n\u0131 detayl\u0131 bir \u015fekilde ele alaca\u011f\u0131z. Yo\u011fun bekleme, bir i\u015f par\u00e7ac\u0131\u011f\u0131n\u0131n belirli bir ko\u015fulun ger\u00e7ekle\u015fmesini s\u00fcrekli olarak kontrol ederek CPU d\u00f6ng\u00fclerini bo\u015fa harcamas\u0131 anlam\u0131na gelir. Bu durum, performans sorunlar\u0131na yol a\u00e7abilecek verimsiz bir yakla\u015f\u0131md\u0131r. Ancak, baz\u0131 \u00f6zel durumlarda avantajl\u0131 olabilmektedir.","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\/java-coklu-is-parcacikli-uygulamalarda-yogun-bekleme-busy-waiting\/","og_locale":"tr_TR","og_type":"article","og_title":"Java \u00c7oklu \u0130\u015f Par\u00e7ac\u0131kl\u0131 Uygulamalarda Yo\u011fun Bekleme (Busy Waiting)","og_description":"Merhaba, Fatih Soysal burada. Bu yaz\u0131da, Java \u00e7oklu i\u015f par\u00e7ac\u0131kl\u0131 uygulamalar\u0131nda s\u0131k kar\u015f\u0131la\u015f\u0131lan bir durum olan yo\u011fun bekleme (busy waiting) kavram\u0131n\u0131 detayl\u0131 bir \u015fekilde ele alaca\u011f\u0131z. 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