📍Use lombok, reformat, and optimize the code (#1560)

* Use lombok, reformat, and optimize the code

* Fix merge conflicts and some sonar issues

Co-authored-by: va1m <va1m@email.com>

caching/src/main/java/com/iluwatar/caching/App.java

@@ -23,8 +23,7 @@
 
 package com.iluwatar.caching;
 
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
+import lombok.extern.slf4j.Slf4j;
 
 /**
  * The Caching pattern describes how to avoid expensive re-acquisition of resources by not releasing
@@ -60,11 +59,9 @@ import org.slf4j.LoggerFactory;
  * @see LruCache
  * @see CachingPolicy
  */
+@Slf4j
 public class App {
 
-  private static final Logger LOGGER = LoggerFactory.getLogger(App.class);
-
-
   /**
    * Program entry point.
    *

caching/src/main/java/com/iluwatar/caching/CacheStore.java

@@ -26,16 +26,14 @@ package com.iluwatar.caching;
 import java.util.List;
 import java.util.Optional;
 import java.util.stream.Collectors;
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
+import lombok.extern.slf4j.Slf4j;
 
 /**
  * The caching strategies are implemented in this class.
  */
+@Slf4j
 public class CacheStore {
 
-  private static final Logger LOGGER = LoggerFactory.getLogger(CacheStore.class);
-
   private static LruCache cache;
 
   private CacheStore() {

caching/src/main/java/com/iluwatar/caching/CachingPolicy.java

@@ -23,19 +23,19 @@
 
 package com.iluwatar.caching;
 
+import lombok.AllArgsConstructor;
+import lombok.Getter;
+
 /**
  * Enum class containing the four caching strategies implemented in the pattern.
  */
+@AllArgsConstructor
+@Getter
 public enum CachingPolicy {
-  THROUGH("through"), AROUND("around"), BEHIND("behind"), ASIDE("aside");
+  THROUGH("through"),
+  AROUND("around"),
+  BEHIND("behind"),
+  ASIDE("aside");
 
   private final String policy;
-
-  CachingPolicy(String policy) {
-    this.policy = policy;
-  }
-
-  public String getPolicy() {
-    return policy;
-  }
 }

caching/src/main/java/com/iluwatar/caching/LruCache.java

@@ -27,8 +27,7 @@ import java.util.ArrayList;
 import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
+import lombok.extern.slf4j.Slf4j;
 
 /**
  * Data structure/implementation of the application's cache. The data structure consists of a hash
@@ -37,11 +36,10 @@ import org.slf4j.LoggerFactory;
  * the data is moved to the front of the list to depict itself as the most-recently-used data. The
  * LRU data is always at the end of the list.
  */
+@Slf4j
 public class LruCache {
 
-  private static final Logger LOGGER = LoggerFactory.getLogger(LruCache.class);
-
-  class Node {
+  static class Node {
     String userId;
     UserAccount userAccount;
     Node previous;

caching/src/main/java/com/iluwatar/caching/UserAccount.java

@@ -23,49 +23,20 @@
 
 package com.iluwatar.caching;
 
+import lombok.AllArgsConstructor;
+import lombok.Getter;
+import lombok.Setter;
+import lombok.ToString;
+
 /**
  * Entity class (stored in cache and DB) used in the application.
  */
+@Setter
+@Getter
+@AllArgsConstructor
+@ToString
 public class UserAccount {
   private String userId;
   private String userName;
   private String additionalInfo;
-
-  /**
-   * Constructor.
-   */
-  public UserAccount(String userId, String userName, String additionalInfo) {
-    this.userId = userId;
-    this.userName = userName;
-    this.additionalInfo = additionalInfo;
-  }
-
-  public String getUserId() {
-    return userId;
-  }
-
-  public void setUserId(String userId) {
-    this.userId = userId;
-  }
-
-  public String getUserName() {
-    return userName;
-  }
-
-  public void setUserName(String userName) {
-    this.userName = userName;
-  }
-
-  public String getAdditionalInfo() {
-    return additionalInfo;
-  }
-
-  public void setAdditionalInfo(String additionalInfo) {
-    this.additionalInfo = additionalInfo;
-  }
-
-  @Override
-  public String toString() {
-    return userId + ", " + userName + ", " + additionalInfo;
-  }
 }