[Spring] 스프링 부트 최초 실행 init 메소드 생성 방법

2022-11-14

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Photo by Svitlana on Unsplash

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1. 방법

 

최초 실행하고 싶은 메서드를 우선적으로 만든 후 아래와 같이 코드를 작성한다.

 

import org.springframework.beans.factory.InitializingBean;
import org.springframework.stereotype.Component;

import lombok.RequiredArgsConstructor;

@Component
@RequiredArgsConstructor
public class ServiceInit implements InitializingBean{

	private final ServiceInitTest serviceInitTest; //자신이 사용하고자 하는 클래스를 작성
	
	@Override
	public void afterPropertiesSet() throws Exception {
		init(); //메소드 최초 호출시키기
	}

    public void init() {
    	serviceInitTest.serviceInit(); //자신이 호출하고싶은 메소드
    }
}

 

InitializingBean라는 클래스를 implements 해서 사용하는 것이다. 해당 클래스는 최초 스프링 부트가 실행이 될때 동작을 한다. 아래의 소스코드에서 확인할 수 있듯이 afterPropertiesSet() 메소드를 오버라이딩 하여 실행하고자 하는 메서드를 넣으면, 해당 메서드는 스프링 부트 최초 실행 시 동작하게 된다.

 

package org.springframework.beans.factory;

/**
 * Interface to be implemented by beans that need to react once all their properties
 * have been set by a {@link BeanFactory}: e.g. to perform custom initialization,
 * or merely to check that all mandatory properties have been set.
 *
 * <p>An alternative to implementing {@code InitializingBean} is specifying a custom
 * init method, for example in an XML bean definition. For a list of all bean
 * lifecycle methods, see the {@link BeanFactory BeanFactory javadocs}.
 *
 * @author Rod Johnson
 * @author Juergen Hoeller
 * @see DisposableBean
 * @see org.springframework.beans.factory.config.BeanDefinition#getPropertyValues()
 * @see org.springframework.beans.factory.support.AbstractBeanDefinition#getInitMethodName()
 */
public interface InitializingBean {

	/**
	 * Invoked by the containing {@code BeanFactory} after it has set all bean properties
	 * and satisfied {@link BeanFactoryAware}, {@code ApplicationContextAware} etc.
	 * <p>This method allows the bean instance to perform validation of its overall
	 * configuration and final initialization when all bean properties have been set.
	 * @throws Exception in the event of misconfiguration (such as failure to set an
	 * essential property) or if initialization fails for any other reason
	 */
	void afterPropertiesSet() throws Exception;

}

 

 

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메인 이미지 출처 : Photo by Svitlana on Unsplash