ApplicationContextProvier 구현

import java.util.Objects;
import org.springframework.beans.BeansException;
import org.springframework.context.ApplicationContext;
import org.springframework.context.ApplicationContextAware;
import org.springframework.lang.Nullable;
import org.springframework.stereotype.Component;

@Component
public class ApplicationContextProvider implements ApplicationContextAware {

  private static ApplicationContext applicationContext;

  @Nullable
  public static <T> T getBean(String beanName, Class<T> requireType) {
    if (Objects.isNull(applicationContext)) {
      return null;
    }

    return applicationContext.getBean(beanName, requireType);
  }

  @Override
  public void setApplicationContext(@Nullable ApplicationContext applicationContext)
      throws BeansException {
    ApplicationContextProvider.applicationContext = applicationContext;
  }
}

Bean 가져오기

Bean name에 주의

혹시 모르니 null 체크는 해주는게 좋을듯

String branchServiceBeanName = "branchService";
BranchService branchService = ApplicationContextProvider
        .getBean(
            branchServiceBeanName,
            BranchService.class
        );
if (Objects.nonNull(branchService)) {
	branchService.sayHello();
}

References

Spring 빈이 아닌 클래스에서 빈 얻기

ApplicationContextProvier를 좀 편하게 쓸 수 있게 변경하였다.

사용하는 쪽에서 null 체크 하지 않아도 된다.

해당 클래스의 유일한 Bean일 경우 beanName을 입력하지 않아도 된다.

import java.util.Objects;
import lombok.NonNull;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeansException;
import org.springframework.context.ApplicationContext;
import org.springframework.context.ApplicationContextAware;
import org.springframework.lang.Nullable;
import org.springframework.stereotype.Component;

@Slf4j
@Component
public class ApplicationContextProvider implements ApplicationContextAware {

  private static ApplicationContext applicationContext;

  @NonNull
  public static <T> T getBean(String beanName, Class<T> requiredType) throws BeansException {
    Objects.requireNonNull(applicationContext,
        "applicationContext is null. " + beanName + ", " + requiredType.getName());

    T bean = null;

    try {
      bean = applicationContext.getBean(beanName, requiredType);
    } catch (BeansException beansException) {
      log.error("getBean Error " + beanName + ", " + requiredType.getName());
    }

    Objects.requireNonNull(bean, "bean is null " + beanName + ", " + requiredType.getName());

    return bean;
  }

  @NonNull
  public static <T> T getBean(Class<T> requiredType) throws BeansException {
    Objects.requireNonNull(applicationContext,
        "applicationContext is null. " + requiredType.getName());

    T bean = null;

    try {
      bean = applicationContext.getBean(requiredType);
    } catch (BeansException beansException) {
      log.error("getBean Error " + requiredType.getName());
    }

    Objects.requireNonNull(bean, "bean is null " + requiredType.getName());

    return bean;
  }

  @Override
  public void setApplicationContext(@Nullable ApplicationContext applicationContext)
      throws BeansException {
    ApplicationContextProvider.applicationContext = applicationContext;
  }
}

Spring Bean이 아닌 클래스에서 Bean 가져오기

ApplicationContextProvier 구현

Bean 가져오기

References