BAEL-3559: Change server response to mimic an echo server

spring-mvc-java/src/main/java/com/baeldung/web/controller/MultipartFileUploadStubController.java

@@ -1,33 +1,58 @@
 package com.baeldung.web.controller;
 
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
 import org.springframework.http.HttpStatus;
+import org.springframework.http.ResponseEntity;
 import org.springframework.stereotype.Controller;
 import org.springframework.web.bind.annotation.PostMapping;
-import org.springframework.web.bind.annotation.ResponseStatus;
 import org.springframework.web.multipart.MultipartFile;
 
 @Controller
 public class MultipartFileUploadStubController {
-    
-    private static final Logger logger = LoggerFactory.getLogger(MultipartFileUploadStubController.class);
 
     @PostMapping("/stub/multipart")
-    @ResponseStatus(HttpStatus.OK)
-    public void uploadFile(MultipartFile file, String text, String text1, String text2, MultipartFile upstream) {
-        logger.info("Uploaded file: " + format(file));
-        logger.info("  - text: [" + format(text) + "]");
-        logger.info("  - text1: [" + format(text1) + "]");
-        logger.info("  - text2: [" + format(text2) + "]");
-        logger.info("  - upstream: [" + format(upstream) + "]");
+    public ResponseEntity<UploadResultResource> uploadFile(MultipartFile file, String text, String text1, String text2, MultipartFile upstream) {
+        UploadResultResource result = new UploadResultResource(file, text, text1, text2, upstream);
+        return new ResponseEntity<>(result, HttpStatus.OK);
     }
     
-    private static String format(MultipartFile file) {
-        return file == null ? "<null>" : file.getOriginalFilename() + " (size: " + file.getSize() + " bytes)";
-    }
-    
-    private static String format(String str) {
-        return str == null ? "<null>" : str;
+    public static class UploadResultResource {
+        
+        private final String file;
+        private final String text;
+        private final String text1;
+        private final String text2;
+        private final String upstream;
+        
+        public UploadResultResource(MultipartFile file, String text, String text1, String text2, MultipartFile upstream) {
+            this.file = format(file);
+            this.text = text;
+            this.text1 = text1;
+            this.text2 = text2;
+            this.upstream = format(upstream);
+        }
+        
+        private static String format(MultipartFile file) {
+            return file == null ? null : file.getOriginalFilename() + " (size: " + file.getSize() + " bytes)";
+        }
+
+        public String getFile() {
+            return file;
+        }
+
+        public String getText() {
+            return text;
+        }
+
+        public String getText1() {
+            return text1;
+        }
+
+        public String getText2() {
+            return text2;
+        }
+
+        public String getUpstream() {
+            return upstream;
+        }
     }
 }