diff --git a/spring-cloud/spring-cloud-bootstrap/svc-rating/src/main/java/com/baeldung/spring/cloud/bootstrap/svcrating/rating/RatingCacheRepository.java b/spring-cloud/spring-cloud-bootstrap/svc-rating/src/main/java/com/baeldung/spring/cloud/bootstrap/svcrating/rating/RatingCacheRepository.java
index a807a61862..d9f3a3584e 100644
--- a/spring-cloud/spring-cloud-bootstrap/svc-rating/src/main/java/com/baeldung/spring/cloud/bootstrap/svcrating/rating/RatingCacheRepository.java
+++ b/spring-cloud/spring-cloud-bootstrap/svc-rating/src/main/java/com/baeldung/spring/cloud/bootstrap/svcrating/rating/RatingCacheRepository.java
@@ -1,13 +1,118 @@
 package com.baeldung.spring.cloud.bootstrap.svcrating.rating;
 
+import java.io.IOException;
 import java.util.List;
+import java.util.stream.Collectors;
 
-public interface RatingCacheRepository {
+import org.springframework.beans.factory.InitializingBean;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.data.redis.connection.jedis.JedisConnectionFactory;
+import org.springframework.data.redis.core.SetOperations;
+import org.springframework.data.redis.core.StringRedisTemplate;
+import org.springframework.data.redis.core.ValueOperations;
 
-    List<Rating> findCachedRatingsByBookId(Long bookId);
-    Rating findCachedRatingById(Long ratingId);
-    List<Rating> findAllCachedRatings();
-    boolean createRating(Rating persisted);
-    boolean updateRating(Rating persisted);
-    boolean deleteRating(Long ratingId);
-}
+import com.fasterxml.jackson.core.JsonProcessingException;
+import com.fasterxml.jackson.databind.DeserializationFeature;
+import com.fasterxml.jackson.databind.ObjectMapper;
+import org.springframework.stereotype.Repository;
+
+@Repository
+public class RatingCacheRepository implements InitializingBean {
+
+    @Autowired
+    private JedisConnectionFactory cacheConnectionFactory;
+
+    private StringRedisTemplate redisTemplate;
+    private ValueOperations<String, String> valueOps;
+    private SetOperations<String, String> setOps;
+
+    private ObjectMapper jsonMapper;
+
+    public List<Rating> findCachedRatingsByBookId(Long bookId) {
+        return setOps.members("book-" + bookId)
+            .stream()
+            .map(rtId -> {
+                try {
+                    return jsonMapper.readValue(valueOps.get(rtId), Rating.class);
+                } catch (IOException ex) {
+                    return null;
+                }
+            })
+            .collect(Collectors.toList());
+    }
+
+    public Rating findCachedRatingById(Long ratingId) {
+
+        try {
+            return jsonMapper.readValue(valueOps.get("rating-" + ratingId), Rating.class);
+        } catch (IOException e) {
+            return null;
+        }
+
+    }
+
+    public List<Rating> findAllCachedRatings() {
+        List<Rating> ratings = null;
+
+        ratings = redisTemplate.keys("rating*")
+            .stream()
+            .map(rtId -> {
+                try {
+
+                    return jsonMapper.readValue(valueOps.get(rtId), Rating.class);
+
+                } catch (IOException e) {
+                    return null;
+                }
+            })
+            .collect(Collectors.toList());
+
+        return ratings;
+    }
+
+    public boolean createRating(Rating persisted) {
+        try {
+            valueOps.set("rating-" + persisted.getId(), jsonMapper.writeValueAsString(persisted));
+            setOps.add("book-" + persisted.getBookId(), "rating-" + persisted.getId());
+            return true;
+        } catch (JsonProcessingException ex) {
+            return false;
+        }
+    }
+
+    public boolean updateRating(Rating persisted) {
+        try {
+            valueOps.set("rating-" + persisted.getId(), jsonMapper.writeValueAsString(persisted));
+            return true;
+        } catch (JsonProcessingException e) {
+            e.printStackTrace();
+        }
+        return false;
+    }
+
+    public boolean deleteRating(Long ratingId) {
+        Rating toDel;
+        try {
+
+            toDel = jsonMapper.readValue(valueOps.get("rating-" + ratingId), Rating.class);
+            setOps.remove("book-" + toDel.getBookId(), "rating-" + ratingId);
+            redisTemplate.delete("rating-" + ratingId);
+            return true;
+        } catch (IOException e) {
+            e.printStackTrace();
+        }
+        return false;
+    }
+
+    @Override
+    public void afterPropertiesSet() throws Exception {
+
+        this.redisTemplate = new StringRedisTemplate(cacheConnectionFactory);
+
+        this.valueOps = redisTemplate.opsForValue();
+        this.setOps = redisTemplate.opsForSet();
+
+        jsonMapper = new ObjectMapper();
+        jsonMapper.configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false);
+    }
+}
\ No newline at end of file
diff --git a/spring-cloud/spring-cloud-bootstrap/svc-rating/src/main/java/com/baeldung/spring/cloud/bootstrap/svcrating/rating/RatingCacheRepositoryImpl.java b/spring-cloud/spring-cloud-bootstrap/svc-rating/src/main/java/com/baeldung/spring/cloud/bootstrap/svcrating/rating/RatingCacheRepositoryImpl.java
deleted file mode 100644
index 35eddefade..0000000000
--- a/spring-cloud/spring-cloud-bootstrap/svc-rating/src/main/java/com/baeldung/spring/cloud/bootstrap/svcrating/rating/RatingCacheRepositoryImpl.java
+++ /dev/null
@@ -1,120 +0,0 @@
-package com.baeldung.spring.cloud.bootstrap.svcrating.rating;
-
-import java.io.IOException;
-import java.util.List;
-import java.util.stream.Collectors;
-
-import org.springframework.beans.factory.InitializingBean;
-import org.springframework.beans.factory.annotation.Autowired;
-import org.springframework.data.redis.connection.jedis.JedisConnectionFactory;
-import org.springframework.data.redis.core.SetOperations;
-import org.springframework.data.redis.core.StringRedisTemplate;
-import org.springframework.data.redis.core.ValueOperations;
-import org.springframework.stereotype.Repository;
-
-import com.fasterxml.jackson.core.JsonProcessingException;
-import com.fasterxml.jackson.databind.DeserializationFeature;
-import com.fasterxml.jackson.databind.ObjectMapper;
-
-@Repository
-public class RatingCacheRepositoryImpl implements InitializingBean, RatingCacheRepository {
-
-    @Autowired
-    private JedisConnectionFactory cacheConnectionFactory;
-
-    private StringRedisTemplate redisTemplate;
-    private ValueOperations<String, String> valueOps;
-    private SetOperations<String, String> setOps;
-
-    private ObjectMapper jsonMapper;
-
-    public List<Rating> findCachedRatingsByBookId(Long bookId) {
-        return setOps.members("book-" + bookId)
-            .stream()
-            .map(rtId -> {
-                try {
-                    Rating rt = jsonMapper.readValue(valueOps.get(rtId), Rating.class);
-                    rt.setFromCache(true);
-                    return rt;
-                } catch (IOException ex) {
-                    return null;
-                }
-            })
-            .collect(Collectors.toList());
-    }
-
-    public Rating findCachedRatingById(Long ratingId) {
-
-        try {
-            return jsonMapper.readValue(valueOps.get("rating-" + ratingId), Rating.class);
-        } catch (IOException e) {
-            return null;
-        }
-
-    }
-
-    public List<Rating> findAllCachedRatings() {
-        List<Rating> ratings = null;
-
-        ratings = redisTemplate.keys("rating*")
-            .stream()
-            .map(rtId -> {
-                try {
-
-                    return jsonMapper.readValue(valueOps.get(rtId), Rating.class);
-
-                } catch (IOException e) {
-                    return null;
-                }
-            })
-            .collect(Collectors.toList());
-
-        return ratings;
-    }
-
-    public boolean createRating(Rating persisted) {
-        try {
-            valueOps.set("rating-" + persisted.getId(), jsonMapper.writeValueAsString(persisted));
-            setOps.add("book-" + persisted.getBookId(), "rating-" + persisted.getId());
-            return true;
-        } catch (JsonProcessingException ex) {
-            return false;
-        }
-    }
-
-    public boolean updateRating(Rating persisted) {
-        try {
-            valueOps.set("rating-" + persisted.getId(), jsonMapper.writeValueAsString(persisted));
-            return true;
-        } catch (JsonProcessingException e) {
-            e.printStackTrace();
-        }
-        return false;
-    }
-
-    public boolean deleteRating(Long ratingId) {
-        Rating toDel;
-        try {
-
-            toDel = jsonMapper.readValue(valueOps.get("rating-" + ratingId), Rating.class);
-            setOps.remove("book-" + toDel.getBookId(), "rating-" + ratingId);
-            redisTemplate.delete("rating-" + ratingId);
-            return true;
-        } catch (IOException e) {
-            e.printStackTrace();
-        }
-        return false;
-    }
-
-    @Override
-    public void afterPropertiesSet() throws Exception {
-
-        this.redisTemplate = new StringRedisTemplate(cacheConnectionFactory);
-
-        this.valueOps = redisTemplate.opsForValue();
-        this.setOps = redisTemplate.opsForSet();
-
-        jsonMapper = new ObjectMapper();
-        jsonMapper.configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false);
-    }
-}