exception : handle exception(filter)

exception/src/main/java/hello/exception/WebConfig.java

@@ -0,0 +1,24 @@
+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<Filter> logFilter() {
+        FilterRegistrationBean<Filter> filterRegistrationBean = new FilterRegistrationBean<>();
+        filterRegistrationBean.setFilter(new LogFilter());
+        filterRegistrationBean.setOrder(1);
+        filterRegistrationBean.addUrlPatterns("/*");
+        filterRegistrationBean.setDispatcherTypes(DispatcherType.REQUEST, DispatcherType.ERROR);
+        return filterRegistrationBean;
+    }
+}

exception/src/main/java/hello/exception/filter/LogFilter.java

@@ -0,0 +1,36 @@
+package hello.exception.filter;
+
+import lombok.extern.slf4j.Slf4j;
+
+import javax.servlet.*;
+import javax.servlet.http.HttpServletRequest;
+import java.io.IOException;
+import java.util.UUID;
+
+@Slf4j
+public class LogFilter implements Filter {
+    @Override
+    public void init(FilterConfig filterConfig) throws ServletException {
+        log.info("log filter init");
+    }
+    @Override
+    public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws ServletException, IOException {
+        HttpServletRequest httpRequest = (HttpServletRequest) request;
+        String requestURI = httpRequest.getRequestURI();
+
+        String uuid = UUID.randomUUID().toString();
+        try {
+            log.info("REQUEST [{}][{}][{}]", uuid, request.getDispatcherType(), requestURI);
+            chain.doFilter(request, response);
+        } catch (Exception e) {
+            log.info("EXCEPTION ! {}", e.getMessage());
+            throw e;
+        } finally {
+            log.info("RESPONSE [{}][{}][{}]", uuid, request.getDispatcherType(), requestURI);
+        }
+    }
+    @Override
+    public void destroy() {
+        log.info("log filter destroy");
+    }
+}