docs: update sharding (#2964)

sharding/src/main/java/com/iluwatar/sharding/Data.java

@@ -24,9 +24,14 @@
  */
 package com.iluwatar.sharding;
 
+import lombok.Getter;
+import lombok.Setter;
+
 /**
  * Basic data structure for each tuple stored in data shards.
  */
+@Getter
+@Setter
 public class Data {
 
   private int key;
@@ -47,30 +52,6 @@ public class Data {
     this.type = type;
   }
 
-  public int getKey() {
-    return key;
-  }
-
-  public void setKey(final int key) {
-    this.key = key;
-  }
-
-  public String getValue() {
-    return value;
-  }
-
-  public void setValue(final String value) {
-    this.value = value;
-  }
-
-  public DataType getType() {
-    return type;
-  }
-
-  public void setType(DataType type) {
-    this.type = type;
-  }
-
   enum DataType {
     TYPE_1, TYPE_2, TYPE_3
   }

sharding/src/main/java/com/iluwatar/sharding/HashShardManager.java

@@ -40,7 +40,7 @@ public class HashShardManager extends ShardManager {
     var shardId = allocateShard(data);
     var shard = shardMap.get(shardId);
     shard.storeData(data);
-    LOGGER.info(data.toString() + " is stored in Shard " + shardId);
+    LOGGER.info(data + " is stored in Shard " + shardId);
     return shardId;
   }
 

sharding/src/main/java/com/iluwatar/sharding/LookupShardManager.java

@@ -27,7 +27,6 @@ package com.iluwatar.sharding;
 import java.security.SecureRandom;
 import java.util.HashMap;
 import java.util.Map;
-import java.util.Random;
 import lombok.extern.slf4j.Slf4j;
 
 /**
@@ -46,7 +45,7 @@ public class LookupShardManager extends ShardManager {
     lookupMap.put(data.getKey(), shardId);
     var shard = shardMap.get(shardId);
     shard.storeData(data);
-    LOGGER.info(data.toString() + " is stored in Shard " + shardId);
+    LOGGER.info(data + " is stored in Shard " + shardId);
     return shardId;
   }
 

sharding/src/main/java/com/iluwatar/sharding/RangeShardManager.java

@@ -38,7 +38,7 @@ public class RangeShardManager extends ShardManager {
     var shardId = allocateShard(data);
     var shard = shardMap.get(shardId);
     shard.storeData(data);
-    LOGGER.info(data.toString() + " is stored in Shard " + shardId);
+    LOGGER.info(data + " is stored in Shard " + shardId);
     return shardId;
   }
 
@@ -49,7 +49,6 @@ public class RangeShardManager extends ShardManager {
       case TYPE_1 -> 1;
       case TYPE_2 -> 2;
       case TYPE_3 -> 3;
-      default -> -1;
     };
   }
 

sharding/src/main/java/com/iluwatar/sharding/Shard.java

@@ -26,12 +26,14 @@ package com.iluwatar.sharding;
 
 import java.util.HashMap;
 import java.util.Map;
+import lombok.Getter;
 
 /**
  * The Shard class stored data in a HashMap.
  */
 public class Shard {
 
+  @Getter
   private final int id;
 
   private final Map<Integer, Data> dataStore;
@@ -52,9 +54,4 @@ public class Shard {
   public Data getDataById(final int id) {
     return dataStore.get(id);
   }
-
-  public int getId() {
-    return id;
-  }
-
 }