📍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>

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

@@ -23,11 +23,9 @@
 
 package com.iluwatar.balking;
 
-import java.util.concurrent.ExecutorService;
 import java.util.concurrent.Executors;
 import java.util.concurrent.TimeUnit;
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
+import lombok.extern.slf4j.Slf4j;
 
 /**
  * In Balking Design Pattern if an object’s method is invoked when it is in an inappropriate state,
@@ -40,11 +38,9 @@ import org.slf4j.LoggerFactory;
  * been already washing and any other thread execute wash() it can't do that once again and returns
  * doing nothing.
  */
-
+@Slf4j
 public class App {
 
-  private static final Logger LOGGER = LoggerFactory.getLogger(App.class);
-
   /**
    * Entry Point.
    *
@@ -61,6 +57,7 @@ public class App {
       executorService.awaitTermination(10, TimeUnit.SECONDS);
     } catch (InterruptedException ie) {
       LOGGER.error("ERROR: Waiting on executor service shutdown!");
+      Thread.currentThread().interrupt();
     }
   }
 

balking/src/main/java/com/iluwatar/balking/WashingMachine.java

@@ -24,15 +24,14 @@
 package com.iluwatar.balking;
 
 import java.util.concurrent.TimeUnit;
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
+import lombok.extern.slf4j.Slf4j;
 
 /**
  * Washing machine class.
  */
+@Slf4j
 public class WashingMachine {
 
-  private static final Logger LOGGER = LoggerFactory.getLogger(WashingMachine.class);
   private final DelayProvider delayProvider;
   private WashingMachineState washingMachineState;
 
@@ -44,7 +43,8 @@ public class WashingMachine {
       try {
         Thread.sleep(timeUnit.toMillis(interval));
       } catch (InterruptedException ie) {
-        ie.printStackTrace();
+        LOGGER.error("", ie);
+        Thread.currentThread().interrupt();
       }
       task.run();
     });
@@ -71,7 +71,7 @@ public class WashingMachine {
       var machineState = getWashingMachineState();
       LOGGER.info("{}: Actual machine state: {}", Thread.currentThread().getName(), machineState);
       if (this.washingMachineState == WashingMachineState.WASHING) {
-        LOGGER.error("ERROR: Cannot wash if the machine has been already washing!");
+        LOGGER.error("Cannot wash if the machine has been already washing!");
         return;
       }
       this.washingMachineState = WashingMachineState.WASHING;

balking/src/main/java/com/iluwatar/balking/WashingMachineState.java

@@ -28,5 +28,6 @@ package com.iluwatar.balking;
  * as well as during washing.
  */
 public enum WashingMachineState {
-  ENABLED, WASHING
+  ENABLED,
+  WASHING
 }