Code cleanup (#1461)

* Code cleanup

* Fix flux tests

* Fix checkstyle errors

* Fix compile error

throttling/README.md

@@ -32,8 +32,8 @@ Tenant class presents the clients of the API. CallsCount tracks the number of AP
 ```java
 public class Tenant {
 
-  private String name;
-  private int allowedCallsPerSecond;
+  private final String name;
+  private final int allowedCallsPerSecond;
 
   public Tenant(String name, int allowedCallsPerSecond, CallsCount callsCount) {
     if (allowedCallsPerSecond < 0) {
@@ -56,7 +56,7 @@ public class Tenant {
 public final class CallsCount {
 
   private static final Logger LOGGER = LoggerFactory.getLogger(CallsCount.class);
-  private Map<String, AtomicLong> tenantCallsCount = new ConcurrentHashMap<>();
+  private final Map<String, AtomicLong> tenantCallsCount = new ConcurrentHashMap<>();
 
   public void addTenant(String tenantName) {
     tenantCallsCount.putIfAbsent(tenantName, new AtomicLong(0));

throttling/src/main/java/com/iluwatar/throttling/CallsCount.java

@@ -38,7 +38,7 @@ import org.slf4j.LoggerFactory;
 public final class CallsCount {
 
   private static final Logger LOGGER = LoggerFactory.getLogger(CallsCount.class);
-  private Map<String, AtomicLong> tenantCallsCount = new ConcurrentHashMap<>();
+  private final Map<String, AtomicLong> tenantCallsCount = new ConcurrentHashMap<>();
 
   /**
    * Add a new tenant to the map.

throttling/src/main/java/com/iluwatar/throttling/Tenant.java

@@ -30,8 +30,8 @@ import java.security.InvalidParameterException;
  */
 public class Tenant {
 
-  private String name;
-  private int allowedCallsPerSecond;
+  private final String name;
+  private final int allowedCallsPerSecond;
 
   /**
    * Constructor.

throttling/src/test/java/com/iluwatar/throttling/B2BServiceTest.java

@@ -34,7 +34,7 @@ import org.junit.jupiter.api.Test;
  */
 public class B2BServiceTest {
 
-  private CallsCount callsCount = new CallsCount();
+  private final CallsCount callsCount = new CallsCount();
 
   @Test
   public void dummyCustomerApiTest() {