MS-Lesson2: Spring Boot Crash Course

-> tracer google.com veya traceroute google.com

google unvanina qeder olan marwrutu gosterir

-> AllArgConstructor butun fieldler ucun constructor yaradir

-> RequiredArgConstructor yalniz final fieldler ucun constructor yaradir

-> Bir intefacenin bir nece implementationu olduqda, constructora clasin adini gonderdikde hemin obyekti inject edir.

-> @Qualifier annotationu da bunu hell edir. Bu zaman clasin adini yenede kicik yazmaliyiq.

-> @Scope beanleri singleton veya prototype yaratmaq ucun istifade olunur

-> @Lazy

package az.ingress.ms14.service;

import org.springframework.stereotype.Service;

@Service
public class A {

    private final B b;

    public A(B b) {
        this.b = b;
    }
}

package az.ingress.ms14.service;

import org.springframework.stereotype.Service;

@Service
public class B {

    private final A a;

    public B(A a) {
        this.a = a;
    }
}

Bu zaman rekursiya yaranir. Bu da problemdir.

@Lazy annotasiyasini yazdiqda A klasinin obyektine ehtiyac duyulmadigi teqdirde onu cagirmir.

package az.ingress.ms14.service;

import org.springframework.stereotype.Service;

@Service
public class A {

    private final B b;

    public A(B b) {
        this.b = b;
    }
}

package az.ingress.ms14.service;

import org.springframework.context.annotation.Lazy;
import org.springframework.stereotype.Service;

@Service
public class B {

    private final A a;

    public B(@Lazy A a) {
        this.a = a;
    }
}