آموزش برنامه نویسی جاوا | Java | United States America (US)

Create: 2025-06-03 Update: 2025-07-14 13:52:28

💡استراتژی‌های مختلف Fetch در Hibernate چیست؟

پاسخ:
هابرنیت (Hibernate) از دو نوع اصلی بارگذاری داده (Fetching) پشتیبانی می‌کند:

۱. این Eager Fetching — موجودیت‌های مرتبط را بلافاصله بارگذاری می‌کند.
۲. و این Lazy Fetching — فقط زمانی داده‌های مرتبط را بارگذاری می‌کند که به آن‌ها دسترسی پیدا شود (پیش‌فرض برای مجموعه‌ها).

@OneToMany(mappedBy = "category", fetch = FetchType.LAZY)
private List<Product> products;

استفاده از Lazy Fetching باعث بهبود عملکرد می‌شود، چون انجام joinهای سنگین را تا زمانی که واقعاً نیاز باشد به تأخیر می‌اندازد.

⚡️ @javapro_ir
✈️@group_javapro

آموزش برنامه نویسی جاوا | Java

💡

استراتژی‌های مختلف Fetch در Hibernate چیست؟

پاسخ:
هابرنیت (Hibernate) از دو نوع اصلی بارگذاری داده (Fetching) پشتیبانی می‌کند:

۱. این Eager Fetching — موجودیت‌های مرتبط را بلافاصله بارگذاری می‌کند.
۲. و این Lazy Fetching — فقط زمانی داده‌های مرتبط را بارگذاری می‌کند که به آن‌ها دسترسی پیدا شود (پیش‌فرض برای مجموعه‌ها).

@OneToMany(mappedBy = "category", fetch = FetchType.LAZY)
private List<Product> products;

⚡️ @javapro_ir
✈️@group_javapro

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💡استراتژی‌های مختلف Fetch در Hibernate چیست؟

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