{"id":38519,"date":"2026-02-02T01:00:39","date_gmt":"2026-02-01T22:00:39","guid":{"rendered":"https:\/\/fatihsoysal.com\/blog\/spring-bootta-islemler-transactional-gercekten-ne-yapar-ve-neden-onemlidir\/"},"modified":"2026-02-02T01:00:39","modified_gmt":"2026-02-01T22:00:39","slug":"spring-bootta-islemler-transactional-gercekten-ne-yapar-ve-neden-onemlidir","status":"publish","type":"post","link":"https:\/\/fatihsoysal.com\/blog\/spring-bootta-islemler-transactional-gercekten-ne-yapar-ve-neden-onemlidir\/","title":{"rendered":"Spring Boot’ta \u0130\u015flemler: @Transactional Ger\u00e7ekten Ne Yapar ve Neden \u00d6nemlidir?"},"content":{"rendered":"

Spring Boot’ta \u0130\u015flemler: @Transactional Ger\u00e7ekten Ne Yapar ve Neden \u00d6nemlidir?<\/h2>\n

Modern yaz\u0131l\u0131m geli\u015ftirmenin temel ta\u015flar\u0131ndan biri, veritaban\u0131 i\u015flemlerinin g\u00fcvenli ve tutarl\u0131 bir \u015fekilde y\u00f6netilmesidir. \u00d6zellikle birden fazla veritaban\u0131 operasyonunun tek bir mant\u0131ksal birim olarak ele al\u0131nmas\u0131 gereken senaryolarda, i\u015flemler (transactions) devreye girer. Spring Boot, @Transactional<\/code> annotation’\u0131 ile bu karma\u015f\u0131k s\u00fcreci inan\u0131lmaz derecede basitle\u015ftirerek geli\u015ftiricilere g\u00fc\u00e7l\u00fc bir ara\u00e7 sunar. Peki, bu sihirli annotation perde arkas\u0131nda ger\u00e7ekten ne yapar ve uygulamalar\u0131n\u0131z i\u00e7in neden bu kadar kritik bir \u00f6neme sahiptir? Bu makalede, @Transactional<\/code>‘\u0131n derinliklerine inecek, \u00e7al\u0131\u015fma mekanizmas\u0131n\u0131, parametrelerini, yay\u0131l\u0131m ve izolasyon seviyelerini ele alacak ve kar\u015f\u0131la\u015f\u0131labilecek yayg\u0131n sorunlarla birlikte en iyi uygulama y\u00f6ntemlerini inceleyece\u011fiz.<\/p>\n

Veritaban\u0131 \u0130\u015flemleri ve ACID \u00d6zellikleri<\/h3>\n

Veritaban\u0131 i\u015flemleri, bir veya daha fazla veritaban\u0131 operasyonunun mant\u0131ksal olarak tek bir i\u015f birimi olarak y\u00fcr\u00fct\u00fclmesini sa\u011flayan mekanizmalard\u0131r. Bu i\u015flemler, veri b\u00fct\u00fcnl\u00fc\u011f\u00fcn\u00fc ve g\u00fcvenilirli\u011fini sa\u011flamak i\u00e7in kritik \u00f6neme sahiptir. Bir i\u015flem ba\u015far\u0131l\u0131 bir \u015fekilde tamamlan\u0131rsa (commit), t\u00fcm de\u011fi\u015fiklikler kal\u0131c\u0131 olur; ba\u015far\u0131s\u0131z olursa (rollback), hi\u00e7bir de\u011fi\u015fiklik kal\u0131c\u0131 olmaz ve veritaban\u0131 i\u015flemin ba\u015flang\u0131c\u0131ndaki durumuna geri d\u00f6ner.<\/p>\n

\u0130\u015flem Nedir?<\/h4>\n

Bir i\u015flem, veritaban\u0131nda ger\u00e7ekle\u015ftirilen ve tek bir mant\u0131ksal i\u015f birimi olarak kabul edilen bir dizi i\u015flemdir. \u00d6rne\u011fin, bir banka uygulamas\u0131nda bir hesaptan di\u011ferine para transferi, hem g\u00f6nderen hesaptan d\u00fc\u015fme hem de al\u0131c\u0131 hesaba ekleme i\u015flemlerini i\u00e7eren tek bir i\u015flemdir. Bu iki i\u015flemden biri ba\u015far\u0131s\u0131z olursa, di\u011ferinin de geri al\u0131nmas\u0131 gerekir.<\/p>\n

Atomicity (B\u00fct\u00fcnl\u00fck)<\/h4>\n

Atomicity, bir i\u015flemin ya tamamen ger\u00e7ekle\u015fti\u011fini ya da hi\u00e7 ger\u00e7ekle\u015fmedi\u011fini garanti eder. “Hepsi ya da hi\u00e7biri” prensibi olarak da bilinir. Yukar\u0131daki banka transferi \u00f6rne\u011finde, para ya her iki hesaptan da ba\u015far\u0131yla transfer edilir ya da hi\u00e7 transfer edilmez. K\u0131smi bir transfer durumu s\u00f6z konusu olamaz.<\/p>\n

Consistency (Tutarl\u0131l\u0131k)<\/h4>\n

Consistency, bir i\u015flemin ba\u015flang\u0131c\u0131ndan sonuna kadar veritaban\u0131n\u0131n tutarl\u0131 bir durumda kalmas\u0131n\u0131 sa\u011flar. \u0130\u015flem, veritaban\u0131n\u0131n t\u00fcm k\u0131s\u0131tlamalar\u0131n\u0131 (primary key, foreign key, benzersizlik, tetikleyiciler vb.) ihlal etmeden tamamlanmal\u0131d\u0131r. \u0130\u015flem sonunda veritaban\u0131 her zaman ge\u00e7erli bir durumda olmal\u0131d\u0131r.<\/p>\n

Isolation (\u0130zolasyon)<\/h4>\n

Isolation, e\u015fzamanl\u0131 olarak y\u00fcr\u00fct\u00fclen i\u015flemlerin birbirini etkilememesini sa\u011flar. Her i\u015flem, sanki sistemde tek ba\u015f\u0131na \u00e7al\u0131\u015f\u0131yormu\u015f gibi davran\u0131r. Bir i\u015flem devam ederken yapt\u0131\u011f\u0131 de\u011fi\u015fiklikler, o i\u015flem tamamlan\u0131p commit edilene kadar di\u011fer i\u015flemler taraf\u0131ndan g\u00f6r\u00fcnmez olmal\u0131d\u0131r. Bu, veritaban\u0131 tutarl\u0131l\u0131\u011f\u0131n\u0131 korumak i\u00e7in hayati \u00f6neme sahiptir.<\/p>\n

Durability (Kal\u0131c\u0131l\u0131k)<\/h4>\n

Durability, bir i\u015flem ba\u015far\u0131l\u0131 bir \u015fekilde commit edildikten sonra, yap\u0131lan de\u011fi\u015fikliklerin kal\u0131c\u0131 olaca\u011f\u0131n\u0131 ve sistem \u00e7\u00f6kse bile kaybolmayaca\u011f\u0131n\u0131 garanti eder. Commit edilen veriler, kal\u0131c\u0131 depolama birimine (genellikle disk) yaz\u0131l\u0131r ve kal\u0131c\u0131 hale gelir.<\/p>\n

Spring’de \u0130\u015flem Y\u00f6netimine Giri\u015f<\/h3>\n

Spring Framework, veritaban\u0131 i\u015flemlerini y\u00f6netmek i\u00e7in g\u00fc\u00e7l\u00fc ve esnek bir soyutlama katman\u0131 sunar. Bu soyutlama, farkl\u0131 i\u015flem teknolojileri (JDBC, JPA, Hibernate, JTA vb.) \u00fczerinde tutarl\u0131 bir programlama modeli sa\u011flar. Spring, i\u015flem y\u00f6netimini iki ana \u015fekilde destekler: programatik ve deklaratif.<\/p>\n

Deklaratif ve Programatik \u0130\u015flem Y\u00f6netimi<\/h4>\n

Programatik \u0130\u015flem Y\u00f6netimi:<\/strong> Geli\u015ftiricinin i\u015flem s\u0131n\u0131rlar\u0131n\u0131 kod i\u00e7inde manuel olarak belirlemesidir. Bu, PlatformTransactionManager<\/code> aray\u00fcz\u00fcn\u00fc do\u011frudan kullanarak beginTransaction()<\/code>, commit()<\/code> ve rollback()<\/code> gibi metotlar\u0131 \u00e7a\u011f\u0131rmay\u0131 i\u00e7erir. Daha fazla kontrol sa\u011flasa da, kod tekrar\u0131na ve karma\u015f\u0131kl\u0131\u011fa yol a\u00e7abilir.<\/p>\n

Deklaratif \u0130\u015flem Y\u00f6netimi:<\/strong> Spring’in en yayg\u0131n ve tercih edilen yakla\u015f\u0131m\u0131d\u0131r. Geli\u015ftiricilerin, @Transactional<\/code> annotation’\u0131n\u0131 kullanarak i\u015flem \u00f6zelliklerini bildirmesini sa\u011flar. Spring, \u00e7al\u0131\u015fma zaman\u0131nda bu annotation’lar\u0131 alg\u0131lar ve uygun i\u015flem y\u00f6netimini otomatik olarak uygular. Bu, kodun daha temiz, okunabilir ve s\u00fcrd\u00fcr\u00fclebilir olmas\u0131n\u0131 sa\u011flar.<\/p>\n

Platform Ba\u011f\u0131ms\u0131z \u0130\u015flem API’lar\u0131<\/h4>\n

Spring’in i\u015flem soyutlamas\u0131, altta yatan i\u015flem teknolojisinden ba\u011f\u0131ms\u0131zd\u0131r. Bu, uygulaman\u0131z\u0131n veritaban\u0131 veya ORM teknolojisini de\u011fi\u015ftirdi\u011finizde i\u015flem y\u00f6netim kodunuzu yeniden yazmak zorunda kalmayaca\u011f\u0131n\u0131z anlam\u0131na gelir. Spring, JDBC, JPA, Hibernate, JTA gibi farkl\u0131 teknolojiler i\u00e7in \u00f6zel PlatformTransactionManager<\/code> uygulamalar\u0131 sa\u011flar.<\/p>\n

PlatformTransactionManager<\/h4>\n

PlatformTransactionManager<\/code> aray\u00fcz\u00fc, Spring’in i\u015flem y\u00f6netiminin merkezinde yer al\u0131r. getTransaction()<\/code>, commit()<\/code> ve rollback()<\/code> gibi temel i\u015flem operasyonlar\u0131n\u0131 tan\u0131mlar. Spring Boot uygulamalar\u0131nda, genellikle kullan\u0131lan veri kayna\u011f\u0131na (\u00f6rne\u011fin, JPA i\u00e7in JpaTransactionManager<\/code>, JDBC i\u00e7in DataSourceTransactionManager<\/code>) uygun bir PlatformTransactionManager<\/code> otomatik olarak yap\u0131land\u0131r\u0131l\u0131r ve Spring IoC konteynerine bean olarak eklenir.<\/p>\n

@Transactional<\/code> Annotation’\u0131n\u0131n Derinlemesine \u0130ncelenmesi<\/h3>\n

@Transactional<\/code>, Spring’in deklaratif i\u015flem y\u00f6netiminin kalbidir. Bir metoda veya s\u0131n\u0131fa uyguland\u0131\u011f\u0131nda, Spring’e bu metodun veya s\u0131n\u0131f\u0131n t\u00fcm metotlar\u0131n\u0131n bir i\u015flem ba\u011flam\u0131nda y\u00fcr\u00fct\u00fclmesi gerekti\u011fini bildirir.<\/p>\n

Nas\u0131l \u00c7al\u0131\u015f\u0131r? AOP ve Proxy Mekanizmas\u0131<\/h4>\n

@Transactional<\/code> annotation’\u0131, Spring AOP (Aspect-Oriented Programming) ve proxy mekanizmas\u0131 arac\u0131l\u0131\u011f\u0131yla \u00e7al\u0131\u015f\u0131r. Spring, uygulaman\u0131z\u0131n ba\u015flang\u0131c\u0131nda, @Transactional<\/code> ile i\u015faretlenmi\u015f bean’ler i\u00e7in dinamik proxy’ler olu\u015fturur. Bir istemci bu bean’in @Transactional<\/code> i\u015faretli bir metodunu \u00e7a\u011f\u0131rd\u0131\u011f\u0131nda, \u00e7a\u011fr\u0131 do\u011frudan orijinal metoda gitmez. Bunun yerine, proxy araya girer:
\n1. \u0130\u015flem Ba\u015flatma:<\/strong> Proxy, metodun y\u00fcr\u00fct\u00fclmesinden \u00f6nce bir i\u015flem ba\u015flat\u0131r.
\n2. Metot Y\u00fcr\u00fctme:<\/strong> Orijinal metot y\u00fcr\u00fct\u00fcl\u00fcr.
\n3. \u0130\u015flem Tamamlama:<\/strong> Metot ba\u015far\u0131yla tamamlan\u0131rsa, proxy i\u015flemi commit eder. E\u011fer metot bir RuntimeException<\/code> veya Error<\/code> f\u0131rlat\u0131rsa (varsay\u0131lan olarak), proxy i\u015flemi rollback eder.<\/p>\n

Bu sayede, i\u015flem y\u00f6netimi mant\u0131\u011f\u0131 i\u015f mant\u0131\u011f\u0131ndan ayr\u0131lm\u0131\u015f olur ve kodunuz temiz kal\u0131r.<\/p>\n

Varsay\u0131lan Davran\u0131\u015flar<\/h4>\n

@Transactional<\/code> annotation’\u0131 varsay\u0131lan olarak \u015fu davran\u0131\u015flara sahiptir:
\n* Propagation:<\/strong> REQUIRED<\/code> (e\u011fer bir i\u015flem zaten varsa onu kullan, yoksa yeni bir tane ba\u015flat).
\n* Isolation:<\/strong> Veritaban\u0131n\u0131n varsay\u0131lan izolasyon seviyesi.
\n* ReadOnly:<\/strong> false<\/code> (okuma-yazma i\u015flemi).
\n* Rollback:<\/strong> RuntimeException<\/code> ve Error<\/code> durumlar\u0131nda rollback yapar, Checked Exception<\/code> durumlar\u0131nda yapmaz.<\/p>\n

Checked ve Unchecked Exception’lar<\/h4>\n

Bu, @Transactional<\/code>‘\u0131n anla\u015f\u0131lmas\u0131 gereken \u00f6nemli bir y\u00f6n\u00fcd\u00fcr:
\n* Unchecked Exception (RuntimeException ve Error):<\/strong> Varsay\u0131lan olarak, bir @Transactional<\/code> metot bir RuntimeException<\/code> veya Error<\/code> f\u0131rlatt\u0131\u011f\u0131nda, Spring i\u015flemi otomatik olarak geri al\u0131r (rollback).
\n* Checked Exception:<\/strong> Varsay\u0131lan olarak, bir @Transactional<\/code> metot bir Checked Exception<\/code> f\u0131rlatt\u0131\u011f\u0131nda, Spring i\u015flemi *geri almaz* (commit eder). Bu, genellikle istenmeyen bir durumdur ve rollbackFor<\/code> parametresi ile de\u011fi\u015ftirilebilir.<\/p>\n

import org.springframework.stereotype.Service;\nimport org.springframework.transaction.annotation.Transactional;\n\n@Service\npublic class UserService {\n\n    \/\/ ... repository injection ...\n\n    @Transactional\n    public void createUser(String username, String email) {\n        \/\/ Kullan\u0131c\u0131 olu\u015fturma ve kaydetme i\u015flemleri\n        \/\/ E\u011fer burada bir RuntimeException olu\u015fursa, i\u015flem geri al\u0131n\u0131r.\n        System.out.println(\"Kullan\u0131c\u0131 olu\u015fturuluyor: \" + username);\n        \/\/ userRepository.save(new User(username, email));\n        if (username.equals(\"hata\")) {\n            throw new RuntimeException(\"Kullan\u0131c\u0131 ad\u0131 'hata' olamaz!\");\n        }\n        System.out.println(\"Kullan\u0131c\u0131 ba\u015far\u0131yla olu\u015fturuldu.\");\n    }\n\n    @Transactional(rollbackFor = CustomCheckedException.class)\n    public void processOrder(Long orderId) throws CustomCheckedException {\n        \/\/ Sipari\u015f i\u015fleme mant\u0131\u011f\u0131\n        \/\/ E\u011fer CustomCheckedException f\u0131rlat\u0131l\u0131rsa, i\u015flem geri al\u0131n\u0131r.\n        System.out.println(\"Sipari\u015f i\u015fleniyor: \" + orderId);\n        if (orderId == 999L) {\n            throw new CustomCheckedException(\"Sipari\u015f i\u015flenirken bir hata olu\u015ftu.\");\n        }\n        System.out.println(\"Sipari\u015f ba\u015far\u0131yla i\u015flendi.\");\n    }\n}\n\n\/\/ CustomCheckedException.java\nclass CustomCheckedException extends Exception {\n    public CustomCheckedException(String message) {\n        super(message);\n    }\n}<\/pre>\n
<\/code><\/p>\n
@Transactional<\/code> Parametreleri ve Kullan\u0131m Senaryolar\u0131<\/h3>\n
@Transactional<\/code> annotation'\u0131, i\u015flemin davran\u0131\u015f\u0131n\u0131 \u00f6zelle\u015ftirmek i\u00e7in \u00e7e\u015fitli parametreler sunar. Bu parametreleri do\u011fru kullanmak, uygulaman\u0131z\u0131n performans\u0131n\u0131 ve veri b\u00fct\u00fcnl\u00fc\u011f\u00fcn\u00fc optimize etmenize yard\u0131mc\u0131 olur.<\/p>\n
readOnly<\/code><\/h4>\n
readOnly = true<\/code> olarak ayarland\u0131\u011f\u0131nda, Spring ve altta yatan veritaban\u0131 s\u00fcr\u00fcc\u00fcs\u00fc, bu i\u015flemin yaln\u0131zca okuma operasyonlar\u0131 ger\u00e7ekle\u015ftirece\u011fini bilir. Bu, performans\u0131 art\u0131rabilir, \u00e7\u00fcnk\u00fc veritaban\u0131 kilitlenme mekanizmalar\u0131n\u0131 daha hafif kullanabilir veya okuma replikalar\u0131na y\u00f6nlendirme yapabilir. Yazma operasyonlar\u0131 bu i\u015flem i\u00e7inde denenirse, genellikle bir hata f\u0131rlat\u0131l\u0131r.<\/p>\n
@Transactional(readOnly = true)\npublic List getAllUsers() {\n    return userRepository.findAll();\n}<\/pre>\n
<\/code><\/p>\n
timeout<\/code><\/h4>\n
Bir i\u015flemin ne kadar s\u00fcreyle \u00e7al\u0131\u015fabilece\u011fini belirten saniye cinsinden bir de\u011ferdir. Belirtilen s\u00fcre i\u00e7inde i\u015flem tamamlanmazsa, Spring bir TransactionTimedOutException<\/code> f\u0131rlat\u0131r ve i\u015flemi geri al\u0131r. Bu, uzun s\u00fcren veya tak\u0131l\u0131 kalan i\u015flemlerin kaynaklar\u0131 gereksiz yere me\u015fgul etmesini engellemek i\u00e7in kullan\u0131\u015fl\u0131d\u0131r.<\/p>\n
@Transactional(timeout = 30) \/\/ 30 saniye i\u00e7inde tamamlanmazsa rollback\npublic void processLongRunningReport() {\n    \/\/ Uzun s\u00fcren rapor olu\u015fturma i\u015flemleri\n}<\/pre>\n
<\/code><\/p>\n
rollbackFor<\/code> ve noRollbackFor<\/code><\/h4>\n
Bu parametreler, hangi istisna t\u00fcrlerinin i\u015flemin geri al\u0131nmas\u0131na neden olaca\u011f\u0131n\u0131 (veya olmayaca\u011f\u0131n\u0131) a\u00e7\u0131k\u00e7a belirtmek i\u00e7in kullan\u0131l\u0131r.
\n*   rollbackFor<\/code>: Belirtilen istisna t\u00fcrleri f\u0131rlat\u0131ld\u0131\u011f\u0131nda i\u015flemi geri al\u0131r. Varsay\u0131lan olarak RuntimeException<\/code> ve Error<\/code> i\u00e7in ge\u00e7erlidir. Checked Exception<\/code>'lar i\u00e7in \u00f6zellikle belirtilmesi gerekebilir.
\n*   noRollbackFor<\/code>: Belirtilen istisna t\u00fcrleri f\u0131rlat\u0131ld\u0131\u011f\u0131nda i\u015flemi geri almaz (commit eder). Bu, belirli bir hata durumunda bile i\u015flemin devam etmesini istedi\u011finizde kullan\u0131\u015fl\u0131d\u0131r.<\/p>\n
@Transactional(rollbackFor = {ServiceException.class, IOException.class})\npublic void createProduct(Product product) throws ServiceException, IOException {\n    \/\/ \u00dcr\u00fcn olu\u015fturma mant\u0131\u011f\u0131\n}\n\n@Transactional(noRollbackFor = {UserNotFoundException.class})\npublic void updateUserProfile(User user) throws UserNotFoundException {\n    \/\/ Kullan\u0131c\u0131 profilini g\u00fcncelleme. Kullan\u0131c\u0131 bulunamazsa rollback yapma.\n}<\/pre>\n
<\/code><\/p>\n
value<\/code> (transaction manager se\u00e7imi)<\/h4>\n
Birden fazla PlatformTransactionManager<\/code> bean'i tan\u0131mland\u0131\u011f\u0131nda, hangi i\u015flem y\u00f6neticisinin kullan\u0131laca\u011f\u0131n\u0131 belirtmek i\u00e7in kullan\u0131l\u0131r. Bu, \u00f6zellikle \u00e7oklu veritaban\u0131 veya karma\u015f\u0131k i\u015flem senaryolar\u0131nda \u00f6nemlidir.<\/p>\n
@Configuration\n@EnableTransactionManagement\npublic class DataSourceConfig {\n    \/\/ ... primaryDataSource, secondaryDataSource ...\n\n    @Bean\n    public PlatformTransactionManager primaryTransactionManager(\n            @Qualifier(\"primaryEntityManagerFactory\") EntityManagerFactory emf) {\n        return new JpaTransactionManager(emf);\n    }\n\n    @Bean\n    public PlatformTransactionManager secondaryTransactionManager(\n            @Qualifier(\"secondaryEntityManagerFactory\") EntityManagerFactory emf) {\n        return new JpaTransactionManager(emf);\n    }\n}\n\n@Service\npublic class MultiDbService {\n    @Transactional(\"primaryTransactionManager\")\n    public void doPrimaryDbOperation() { \/* ... *\/ }\n\n    @Transactional(\"secondaryTransactionManager\")\n    public void doSecondaryDbOperation() { \/* ... *\/ }\n}<\/pre>\n
<\/code><\/p>\n
\u0130\u015flem Yay\u0131l\u0131m\u0131 (Propagation) ve \u0130zolasyon Seviyeleri<\/h3>\n
@Transactional<\/code>'\u0131n en karma\u015f\u0131k ama bir o kadar da g\u00fc\u00e7l\u00fc y\u00f6nlerinden ikisi, i\u015flem yay\u0131l\u0131m\u0131 ve izolasyon seviyeleridir. Bunlar\u0131 anlamak, karma\u015f\u0131k i\u015flem senaryolar\u0131n\u0131 do\u011fru bir \u015fekilde y\u00f6netmek i\u00e7in hayati \u00f6neme sahiptir.<\/p>\n
Yay\u0131l\u0131m Tipleri (Propagation)<\/h4>\n
Yay\u0131l\u0131m, bir metodun \u00e7a\u011fr\u0131ld\u0131\u011f\u0131nda mevcut bir i\u015flem ba\u011flam\u0131nda nas\u0131l davranaca\u011f\u0131n\u0131 veya yeni bir i\u015flem ba\u015flat\u0131p ba\u015flatmayaca\u011f\u0131n\u0131 belirler.<\/p>\n\n\n\n\n\n\n\n\n\n\n\n
Yay\u0131l\u0131m Tipi<\/th>\nA\u00e7\u0131klama<\/th>\n<\/tr>\n<\/thead>\n
REQUIRED<\/code> (Varsay\u0131lan)<\/td>\nE\u011fer mevcut bir i\u015flem varsa, onu kullan\u0131r. Yoksa, yeni bir i\u015flem ba\u015flat\u0131r.<\/td>\n<\/tr>\n
SUPPORTS<\/code><\/td>\nE\u011fer mevcut bir i\u015flem varsa, onu kullan\u0131r. Yoksa, i\u015flemsiz devam eder.<\/td>\n<\/tr>\n
MANDATORY<\/code><\/td>\nE\u011fer mevcut bir i\u015flem varsa, onu kullan\u0131r. Yoksa, bir istisna f\u0131rlat\u0131r.<\/td>\n<\/tr>\n
REQUIRES_NEW<\/code><\/td>\nHer zaman yeni bir i\u015flem ba\u015flat\u0131r. Mevcut bir i\u015flem varsa, onu ask\u0131ya al\u0131r.<\/td>\n<\/tr>\n
NOT_SUPPORTED<\/code><\/td>\nMevcut bir i\u015flem varsa, onu ask\u0131ya al\u0131r ve i\u015flemsiz devam eder.<\/td>\n<\/tr>\n
NEVER<\/code><\/td>\nMevcut bir i\u015flem varsa, bir istisna f\u0131rlat\u0131r. Yoksa, i\u015flemsiz devam eder.<\/td>\n<\/tr>\n
NESTED<\/code><\/td>\nMevcut bir i\u015flem varsa, i\u00e7 i\u00e7e bir i\u015flem (savepoint) ba\u015flat\u0131r. Yoksa, REQUIRED<\/code> gibi davran\u0131r.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
\u00d6rnek REQUIRES_NEW<\/code>:<\/strong><\/p>\n
@Service\npublic class OrderService {\n\n    @Transactional(propagation = Propagation.REQUIRED)\n    public void createOrder(Order order, User user) {\n        \/\/ Sipari\u015f olu\u015fturma\n        \/\/ orderRepository.save(order);\n        updateUserBalance(user, order.getTotalAmount()); \/\/ Bu metot farkl\u0131 bir i\u015flemde \u00e7al\u0131\u015facak\n    }\n\n    @Transactional(propagation = Propagation.REQUIRES_NEW)\n    public void updateUserBalance(User user, BigDecimal amount) {\n        \/\/ Kullan\u0131c\u0131 bakiyesini g\u00fcncelleme\n        \/\/ user.setBalance(user.getBalance().subtract(amount));\n        \/\/ userRepository.save(user);\n        \/\/ Bu metot kendi ba\u011f\u0131ms\u0131z i\u015fleminde \u00e7al\u0131\u015f\u0131r.\n        \/\/ createOrder metodu rollback olsa bile, bu metot commit olabilir.\n    }\n}<\/pre>\n
<\/code><\/p>\n
\u0130zolasyon Seviyeleri (Isolation)<\/h4>\n
\u0130zolasyon seviyeleri, e\u015fzamanl\u0131 i\u015flemlerin birbirlerinin verilerini ne kadar g\u00f6rebilece\u011fini kontrol eder. Daha y\u00fcksek izolasyon seviyeleri daha fazla veri tutarl\u0131l\u0131\u011f\u0131 sa\u011flarken, ayn\u0131 zamanda performans\u0131 d\u00fc\u015f\u00fcrebilir ve kilitlenme olas\u0131l\u0131\u011f\u0131n\u0131 art\u0131rabilir.<\/p>\n\n\n\n\n\n\n\n\n\n
\u0130zolasyon Seviyesi<\/th>\nA\u00e7\u0131klama<\/th>\nOlas\u0131 Sorunlar<\/th>\n<\/tr>\n<\/thead>\n
READ_UNCOMMITTED<\/code><\/td>\nEn d\u00fc\u015f\u00fck seviye. Di\u011fer i\u015flemlerin commit edilmemi\u015f de\u011fi\u015fikliklerini g\u00f6rebilir.<\/td>\nDirty Reads, Non-repeatable Reads, Phantom Reads<\/td>\n<\/tr>\n
READ_COMMITTED<\/code><\/td>\nYaln\u0131zca commit edilmi\u015f de\u011fi\u015fiklikleri g\u00f6rebilir.<\/td>\nNon-repeatable Reads, Phantom Reads<\/td>\n<\/tr>\n
REPEATABLE_READ<\/code><\/td>\nBir i\u015flem boyunca ayn\u0131 veriyi tekrar okudu\u011funda ayn\u0131 sonucu garantiler.<\/td>\nPhantom Reads<\/td>\n<\/tr>\n
SERIALIZABLE<\/code><\/td>\nEn y\u00fcksek seviye. \u0130\u015flemlerin tamamen s\u0131ral\u0131 (seri) bir \u015fekilde y\u00fcr\u00fct\u00fcld\u00fc\u011f\u00fcn\u00fc garanti eder.<\/td>\nPerformans d\u00fc\u015f\u00fc\u015f\u00fc, kilitlenme olas\u0131l\u0131\u011f\u0131<\/td>\n<\/tr>\n
DEFAULT<\/code><\/td>\nVeritaban\u0131n\u0131n varsay\u0131lan izolasyon seviyesini kullan\u0131r.<\/td>\nVeritaban\u0131na g\u00f6re de\u011fi\u015fir<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
\u00d6rnek ISOLATION.READ_COMMITTED<\/code>:<\/strong><\/p>\n
@Transactional(isolation = Isolation.READ_COMMITTED)\npublic User getUserById(Long userId) {\n    return userRepository.findById(userId).orElse(null);\n}<\/pre>\n
<\/code><\/p>\n
@Transactional<\/code> ile Kar\u015f\u0131la\u015f\u0131labilecek Sorunlar ve \u00c7\u00f6z\u00fcmleri<\/h3>\n
@Transactional<\/code> g\u00fc\u00e7l\u00fc bir ara\u00e7 olsa da, yanl\u0131\u015f kullan\u0131ld\u0131\u011f\u0131nda beklenmedik davran\u0131\u015flara veya sorunlara yol a\u00e7abilir.<\/p>\n
Self-invocation (Kendi Kendini \u00c7a\u011f\u0131rma) Sorunu<\/h4>\n
@Transactional<\/code> annotation'\u0131, Spring AOP proxy'leri arac\u0131l\u0131\u011f\u0131yla \u00e7al\u0131\u015f\u0131r. E\u011fer bir @Transactional<\/code> metot, ayn\u0131 s\u0131n\u0131f i\u00e7indeki ba\u015fka bir metodu \u00e7a\u011f\u0131r\u0131rsa (yani this.someOtherTransactionalMethod()<\/code>), proxy mekanizmas\u0131 devreye girmez. Bu, \u00e7a\u011fr\u0131lan metodun i\u015flem ba\u011flam\u0131nda \u00e7al\u0131\u015fmayaca\u011f\u0131 anlam\u0131na gelir.<\/p>\n
\u00c7\u00f6z\u00fcm:<\/strong>
\n1.  Ayr\u0131 Bir Servis Metodu:<\/strong> \u0130\u015flem gerektiren metodu ayr\u0131 bir Spring bean'ine (servis s\u0131n\u0131f\u0131na) ta\u015f\u0131mak.
\n2.  ApplicationContext'ten Bean'i Almak:<\/strong> ApplicationContext<\/code>'i enjekte ederek bean'in proxy'li versiyonunu almak. Ancak bu, genellikle daha karma\u015f\u0131k ve \u00f6nerilmeyen bir yakla\u015f\u0131md\u0131r.<\/p>\n
@Service\npublic class MyService {\n\n    \/\/ Self-invocation sorunu\n    @Transactional\n    public void mainMethod() {\n        \/\/ ...\n        this.helperMethod(); \/\/ Bu \u00e7a\u011fr\u0131, mainMethod'un i\u015flem ba\u011flam\u0131nda \u00e7al\u0131\u015f\u0131r,\n                             \/\/ helperMethod'un @Transactional ayarlar\u0131n\u0131 dikkate almaz.\n    }\n\n    @Transactional(propagation = Propagation.REQUIRES_NEW)\n    public void helperMethod() {\n        \/\/ ...\n    }\n}\n\n\/\/ \u00c7\u00f6z\u00fcm: Ayr\u0131 bir servis kullanmak\n@Service\npublic class MyService {\n    private final HelperService helperService;\n\n    public MyService(HelperService helperService) {\n        this.helperService = helperService;\n    }\n\n    @Transactional\n    public void mainMethod() {\n        \/\/ ...\n        helperService.helperMethod(); \/\/ Bu \u00e7a\u011fr\u0131, HelperService'in proxy'si \u00fczerinden ge\u00e7er ve REQUIRES_NEW \u00e7al\u0131\u015f\u0131r.\n    }\n}\n\n@Service\npublic class HelperService {\n    @Transactional(propagation = Propagation.REQUIRES_NEW)\n    public void helperMethod() {\n        \/\/ ...\n    }\n}<\/pre>\n
<\/code><\/p>\n
Yanl\u0131\u015f Exception Yakalama<\/h4>\n
E\u011fer bir @Transactional<\/code> metot i\u00e7inde bir RuntimeException<\/code> f\u0131rlat\u0131l\u0131r ve bu istisna metot i\u00e7inde bir try-catch<\/code> blo\u011fu ile yakalan\u0131r ve tekrar f\u0131rlat\u0131lmazsa, Spring i\u015flemi rollback etmez. \u00c7\u00fcnk\u00fc Spring, istisnan\u0131n metodun d\u0131\u015f\u0131na f\u0131rlat\u0131ld\u0131\u011f\u0131n\u0131 g\u00f6rmez.<\/p>\n
\u00c7\u00f6z\u00fcm:<\/strong> \u0130\u015flemin geri al\u0131nmas\u0131n\u0131 istedi\u011finiz durumlarda istisnay\u0131 yakalad\u0131ktan sonra tekrar f\u0131rlat\u0131n veya TransactionAspectSupport.currentTransactionStatus().setRollbackOnly()<\/code> metodunu \u00e7a\u011f\u0131r\u0131n.<\/p>\n
@Transactional\npublic void doSomethingRisky() {\n    try {\n        \/\/ ... riskli i\u015flem ...\n        if (someCondition) {\n            throw new RuntimeException(\"Hata olu\u015ftu!\");\n        }\n    } catch (RuntimeException e) {\n        \/\/ Hata yakaland\u0131 ama tekrar f\u0131rlat\u0131lmad\u0131. \u0130\u015flem commit edilir!\n        System.err.println(\"Hata yakaland\u0131 ama i\u015flem geri al\u0131nmayacak: \" + e.getMessage());\n        \/\/ Do\u011fru \u00e7\u00f6z\u00fcm:\n        \/\/ throw e; \/\/ \u0130stisnay\u0131 tekrar f\u0131rlat\n        \/\/ Veya:\n        \/\/ TransactionAspectSupport.currentTransactionStatus().setRollbackOnly();\n    }\n}<\/pre>\n
<\/code><\/p>\n
@Transactional<\/code> Annotation'\u0131n\u0131n Yanl\u0131\u015f Yerde Kullan\u0131m\u0131<\/h4>\n
@Transactional<\/code> sadece public metotlara uygulanmal\u0131d\u0131r. Private veya protected metotlara uyguland\u0131\u011f\u0131nda Spring AOP proxy mekanizmas\u0131 devreye giremez ve annotation'\u0131n bir etkisi olmaz. Ayr\u0131ca, annotation'\u0131 do\u011frudan repository aray\u00fczlerine uygulamak yerine servis katman\u0131nda kullanmak daha iyi bir uygulamad\u0131r, \u00e7\u00fcnk\u00fc i\u015f mant\u0131\u011f\u0131 genellikle servis katman\u0131nda bulunur.<\/p>\n
Veritaban\u0131 Kilitlenmeleri (Deadlocks)<\/h4>\n
Y\u00fcksek izolasyon seviyeleri veya uzun s\u00fcreli i\u015flemler, e\u015fzamanl\u0131 olarak \u00e7al\u0131\u015fan i\u015flemler aras\u0131nda kilitlenmelere yol a\u00e7abilir. \u0130ki veya daha fazla i\u015flem, birbirlerinin kilitledi\u011fi kaynaklar\u0131 beklerken s\u00fcresiz olarak tak\u0131l\u0131 kalabilir.<\/p>\n
\u00c7\u00f6z\u00fcm:<\/strong>
\n*   \u0130zolasyon seviyesini d\u00fc\u015f\u00fcrmek (e\u011fer uygulaman\u0131z\u0131n gereksinimleri izin veriyorsa).
\n*   \u0130\u015flem s\u00fcrelerini m\u00fcmk\u00fcn oldu\u011funca k\u0131sa tutmak.
\n*   Veritaban\u0131 eri\u015fim s\u0131ras\u0131n\u0131 standartla\u015ft\u0131rmak.
\n*   Veritaban\u0131 optimizasyonlar\u0131 (indeksler, daha iyi sorgular).
\n*   Spring'in timeout<\/code> parametresini kullanarak i\u015flemleri belirli bir s\u00fcre sonra sonland\u0131rmak.<\/p>\n
En \u0130yi Uygulamalar ve Sonu\u00e7<\/h3>\n
@Transactional<\/code> annotation'\u0131n\u0131 etkin ve g\u00fcvenli bir \u015fekilde kullanmak i\u00e7in baz\u0131 en iyi uygulamalar\u0131 takip etmek \u00f6nemlidir.<\/p>\n
\u0130\u015flem S\u0131n\u0131rlar\u0131n\u0131 Do\u011fru Belirleme<\/h4>\n
\u0130\u015flem s\u0131n\u0131rlar\u0131n\u0131, mant\u0131ksal olarak tek bir i\u015f birimi olan t\u00fcm operasyonlar\u0131 kapsayacak \u015fekilde belirleyin. Genellikle bu, servis katman\u0131ndaki metotlara kar\u015f\u0131l\u0131k gelir. \u00c7ok geni\u015f i\u015flemler performans\u0131 d\u00fc\u015f\u00fcrebilir ve kilitlenme olas\u0131l\u0131\u011f\u0131n\u0131 art\u0131rabilirken, \u00e7ok dar i\u015flemler veri tutars\u0131zl\u0131\u011f\u0131na yol a\u00e7abilir.<\/p>\n
Hafif \u0130\u015flemler Tercihi<\/h4>\n
\u0130\u015flemleri m\u00fcmk\u00fcn oldu\u011funca k\u0131sa ve hafif tutun. Bir i\u015flem i\u00e7inde uzun s\u00fcren a\u011f \u00e7a\u011fr\u0131lar\u0131, dosya i\u015flemleri veya harici servis \u00e7a\u011fr\u0131lar\u0131 yapmaktan ka\u00e7\u0131n\u0131n. Bu t\u00fcr i\u015flemler, veritaban\u0131 kaynaklar\u0131n\u0131 gereksiz yere me\u015fgul eder ve uygulaman\u0131n genel performans\u0131n\u0131 d\u00fc\u015f\u00fcr\u00fcr.<\/p>\n
\u0130zolasyon Seviyelerini Anlamak<\/h4>\n
Veritaban\u0131n\u0131z\u0131n varsay\u0131lan izolasyon seviyesini anlay\u0131n ve uygulaman\u0131z\u0131n gereksinimlerine g\u00f6re en uygun seviyeyi se\u00e7in. Genellikle READ_COMMITTED<\/code> \u00e7o\u011fu uygulama i\u00e7in iyi bir denge sunar. Daha y\u00fcksek seviyeler daha fazla g\u00fcvenlik sa\u011flarken, performans maliyetini de beraberinde getirir.<\/p>\n
Sonu\u00e7 Paragraf\u0131<\/h4>\n
Spring Boot'taki @Transactional<\/code> annotation'\u0131, veritaban\u0131 i\u015flemlerini y\u00f6netmek i\u00e7in geli\u015ftiricilere inan\u0131lmaz bir kolayl\u0131k ve g\u00fc\u00e7 sa\u011flar. AOP ve proxy mekanizmas\u0131 sayesinde, veri b\u00fct\u00fcnl\u00fc\u011f\u00fcn\u00fc ve tutarl\u0131l\u0131\u011f\u0131n\u0131 sa\u011flamak i\u00e7in gereken karma\u015f\u0131k i\u015flem y\u00f6netimini soyutlar. Parametrelerini, yay\u0131l\u0131m ve izolasyon seviyelerini do\u011fru bir \u015fekilde anlamak ve en iyi uygulama y\u00f6ntemlerini takip etmek, sa\u011flam, performansl\u0131 ve g\u00fcvenilir Spring Boot uygulamalar\u0131 geli\u015ftirmenin anahtar\u0131d\u0131r. @Transactional<\/code>'\u0131n perde arkas\u0131ndaki \u00e7al\u0131\u015fma prensiplerini kavrayarak, uygulaman\u0131z\u0131n veri katman\u0131n\u0131 daha bilin\u00e7li ve etkili bir \u015fekilde y\u00f6netebilirsiniz.<\/p>\n
SSS (S\u0131k Sorulan Sorular)<\/h3>\n
@Transactional<\/code> neden \u00e7al\u0131\u015fm\u0131yor?<\/h4>\n
Birka\u00e7 yayg\u0131n neden olabilir:
\n*   Self-invocation:<\/strong> Ayn\u0131 s\u0131n\u0131f i\u00e7indeki bir @Transactional<\/code> metottan ba\u015fka bir @Transactional<\/code> metot \u00e7a\u011fr\u0131lmas\u0131.
\n*   Private\/Protected Metotlar:<\/strong> @Transactional<\/code> sadece public metotlara uygulan\u0131r.
\n*   Exception Yakalama:<\/strong> \u0130\u015flemi geri almas\u0131 gereken bir istisnan\u0131n try-catch<\/code> blo\u011funda yakalan\u0131p tekrar f\u0131rlat\u0131lmamas\u0131.
\n*   Spring Bean Olmamas\u0131:<\/strong> @Transactional<\/code> annotation'\u0131n\u0131n uyguland\u0131\u011f\u0131 s\u0131n\u0131f\u0131n bir Spring bean'i olmamas\u0131.
\n*   @EnableTransactionManagement<\/code> Eksikli\u011fi:<\/strong> Spring Boot uygulamalar\u0131nda otomatik olarak etkinle\u015ftirilse de, bazen manuel olarak eklenmesi gerekebilir.<\/p>\n
@Transactional<\/code> ile try-catch<\/code> bloklar\u0131n\u0131 nas\u0131l kullanmal\u0131y\u0131m?<\/h4>\n
E\u011fer bir istisnay\u0131 yakalay\u0131p i\u015flemin geri al\u0131nmas\u0131n\u0131 istiyorsan\u0131z, istisnay\u0131 yakalad\u0131ktan sonra tekrar f\u0131rlatmal\u0131s\u0131n\u0131z (throw e;<\/code>). E\u011fer istisnay\u0131 yakalay\u0131p i\u015flemin devam etmesini (commit edilmesini) istiyorsan\u0131z, noRollbackFor<\/code> parametresini kullanabilir veya istisnay\u0131 yakalay\u0131p tekrar f\u0131rlatmazs\u0131n\u0131z (ancak bu, genellikle k\u00f6t\u00fc bir uygulamad\u0131r ve dikkatli kullan\u0131lmal\u0131d\u0131r).<\/p>\n
@Transactional<\/code> annotation'\u0131n\u0131 nerede kullanmal\u0131y\u0131m (Service mi, Repository mi)?<\/h4>\n
Genellikle servis katman\u0131nda kullan\u0131lmas\u0131 \u00f6nerilir. Repository katman\u0131 veritaban\u0131 eri\u015fim mant\u0131\u011f\u0131n\u0131 i\u00e7erirken, servis katman\u0131 i\u015f mant\u0131\u011f\u0131n\u0131 ve birden fazla repository operasyonunu tek bir mant\u0131ksal i\u015f birimi olarak koordine eder. Bu nedenle, i\u015flem s\u0131n\u0131rlar\u0131 genellikle servis metotlar\u0131nda belirlenir.<\/p>\n
@Transactional<\/code> ile veritaban\u0131 d\u0131\u015f\u0131ndaki i\u015flemleri y\u00f6netebilir miyim?<\/h4>\n
@Transactional<\/code> annotation'\u0131, temel olarak veritaban\u0131 i\u015flemlerini y\u00f6netmek i\u00e7in tasarlanm\u0131\u015ft\u0131r. Ancak Spring'in i\u015flem soyutlamas\u0131, JTA (Java Transaction API) gibi XA i\u015flemlerini destekleyen teknolojilerle entegre edilebilir. Bu sayede, farkl\u0131 kaynaklar (\u00f6rne\u011fin, birden fazla veritaban\u0131, JMS kuyruklar\u0131) aras\u0131nda da\u011f\u0131t\u0131lm\u0131\u015f i\u015flemleri y\u00f6netmek m\u00fcmk\u00fcn olabilir. Ancak bu, daha karma\u015f\u0131k bir yap\u0131land\u0131rma gerektirir.<\/p>\n","protected":false},"excerpt":{"rendered":"Spring Boot’ta \u0130\u015flemler: @Transactional Ger\u00e7ekten Ne Yapar ve Neden \u00d6nemlidir?\nModern yaz\u0131l\u0131m geli\u015ftirmenin temel ta\u015flar\u0131ndan biri, veritaban\u0131 i\u015f…","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-38519","1":"post","2":"type-post","3":"status-publish","4":"format-standard","6":"category-genel","7":"cs-entry","8":"cs-video-wrap"},"yoast_head":"\nSpring Boot'ta \u0130\u015flemler: @Transactional Ger\u00e7ekten Ne Yapar ve Neden \u00d6nemlidir? - Kodlar\u0131n Gizemli D\u00fcnyas\u0131<\/title>\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\/spring-bootta-islemler-transactional-gercekten-ne-yapar-ve-neden-onemlidir\/\" \/>\n<meta property=\"og:locale\" content=\"tr_TR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Spring Boot'ta \u0130\u015flemler: @Transactional Ger\u00e7ekten Ne Yapar ve Neden \u00d6nemlidir?\" \/>\n<meta property=\"og:description\" content=\"Spring Boot'ta \u0130\u015flemler: @Transactional Ger\u00e7ekten Ne Yapar ve Neden \u00d6nemlidir? 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