스프링 서블릿 예외처리에 대한 로그 필터(필터 중복 호출 설정)

스프링 빈 등록

DispatcherType을 지정

package hello.exception;

import hello.exception.filter.LogFilter;
import org.springframework.boot.web.servlet.FilterRegistrationBean;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;

import javax.servlet.DispatcherType;
import javax.servlet.Filter;

@Configuration
public class WebConfig implements WebMvcConfigurer {

    @Bean
    public FilterRegistrationBean logFilter(){
        FilterRegistrationBean<Filter> filterFilterRegistrationBean = new FilterRegistrationBean<>();
        filterFilterRegistrationBean.setFilter(new LogFilter());
        filterFilterRegistrationBean.setOrder(1);
        filterFilterRegistrationBean.addUrlPatterns("/*");
        // Dispatcher 타입이 REQUEST나 ERROR경우 호출
        // 아무것도 넣지 않으면 REQUEST만 적영된다.
        filterFilterRegistrationBean.setDispatcherTypes(DispatcherType.REQUEST, DispatcherType.ERROR);
        return filterFilterRegistrationBean;
    }
}