iluwatar#502 Replaced usages of System.out with logger.

Author: daniel-bryla

abstract-document/src/main/java/com/iluwatar/abstractdocument/App.java

@@ -27,6 +27,8 @@
 import com.iluwatar.abstractdocument.domain.HasParts;
 import com.iluwatar.abstractdocument.domain.HasPrice;
 import com.iluwatar.abstractdocument.domain.HasType;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
 
 import java.util.Arrays;
 import java.util.HashMap;
@@ -44,11 +46,13 @@
  */
 public class App {
 
+  private static final Logger LOGGER = LoggerFactory.getLogger(App.class);
+
   /**
    * Executes the App
    */
   public App() {
-    System.out.println("Constructing parts and car");
+    LOGGER.info("Constructing parts and car");
 
     Map<String, Object> carProperties = new HashMap<>();
     carProperties.put(HasModel.PROPERTY, "300SL");
@@ -68,12 +72,11 @@ public App() {
 
     Car car = new Car(carProperties);
 
-    System.out.println("Here is our car:");
-    System.out.println("-> model: " + car.getModel().get());
-    System.out.println("-> price: " + car.getPrice().get());
-    System.out.println("-> parts: ");
-    car.getParts().forEach(p -> System.out
-        .println("\t" + p.getType().get() + "/" + p.getModel().get() + "/" + p.getPrice().get()));
+    LOGGER.info("Here is our car:");
+    LOGGER.info("-> model: {}", car.getModel().get());
+    LOGGER.info("-> price: {}", car.getPrice().get());
+    LOGGER.info("-> parts: ");
+    car.getParts().forEach(p -> LOGGER.info("\t{}/{}/{}", p.getType().get(), p.getModel().get(), p.getPrice().get()));
   }
 
   /**

abstract-factory/src/main/java/com/iluwatar/abstractfactory/App.java

@@ -22,6 +22,9 @@
  */
 package com.iluwatar.abstractfactory;
 
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
 /**
  * 
  * The Abstract Factory pattern provides a way to encapsulate a group of individual factories that have a common theme
@@ -39,6 +42,8 @@
  */
 public class App {
 
+  private static final Logger LOGGER = LoggerFactory.getLogger(App.class);
+
   private King king;
   private Castle castle;
   private Army army;
@@ -98,17 +103,17 @@ public static void main(String[] args) {
 
     App app = new App();
 
-    System.out.println("Elf Kingdom");
+    LOGGER.info("Elf Kingdom");
     app.createKingdom(new ElfKingdomFactory());
-    System.out.println(app.getArmy().getDescription());
-    System.out.println(app.getCastle().getDescription());
-    System.out.println(app.getKing().getDescription());
+    LOGGER.info(app.getArmy().getDescription());
+    LOGGER.info(app.getCastle().getDescription());
+    LOGGER.info(app.getKing().getDescription());
 
-    System.out.println("\nOrc Kingdom");
+    LOGGER.info("Orc Kingdom");
     app.createKingdom(new OrcKingdomFactory());
-    System.out.println(app.getArmy().getDescription());
-    System.out.println(app.getCastle().getDescription());
-    System.out.println(app.getKing().getDescription());
+    LOGGER.info(app.getArmy().getDescription());
+    LOGGER.info(app.getCastle().getDescription());
+    LOGGER.info(app.getKing().getDescription());
 
   }
 

adapter/src/main/java/com/iluwatar/adapter/BattleFishingBoat.java

@@ -22,6 +22,9 @@
  */
 package com.iluwatar.adapter;
 
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
 /**
  *
  * Adapter class. Adapts the interface of the device ({@link FishingBoat}) into {@link BattleShip}
@@ -33,6 +36,8 @@
  */
 public class BattleFishingBoat implements BattleShip {
 
+  private static final Logger LOGGER = LoggerFactory.getLogger(BattleFishingBoat.class);
+
   private FishingBoat boat;
 
   public BattleFishingBoat() {
@@ -41,7 +46,7 @@ public BattleFishingBoat() {
 
   @Override
   public void fire() {
-    System.out.println("fire!");
+    LOGGER.info("fire!");
   }
 
   @Override

adapter/src/main/java/com/iluwatar/adapter/FishingBoat.java

@@ -22,19 +22,24 @@
  */
 package com.iluwatar.adapter;
 
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
 /**
  *
  * Device class (adaptee in the pattern). We want to reuse this class
  *
  */
 public class FishingBoat {
 
+  private static final Logger LOGGER = LoggerFactory.getLogger(FishingBoat.class);
+
   public void sail() {
-    System.out.println("The Boat is moving to that place");
+    LOGGER.info("The Boat is moving to that place");
   }
 
   public void fish() {
-    System.out.println("fishing ...");
+    LOGGER.info("fishing ...");
   }
 
 }

aggregator-microservices/aggregator-service/src/main/java/com/iluwatar/aggregator/microservices/ProductInformationClientImpl.java

@@ -27,6 +27,8 @@
 import org.apache.http.impl.client.CloseableHttpClient;
 import org.apache.http.impl.client.HttpClients;
 import org.apache.http.util.EntityUtils;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
 import org.springframework.stereotype.Component;
 
 import java.io.IOException;
@@ -37,6 +39,8 @@
 @Component
 public class ProductInformationClientImpl implements ProductInformationClient {
 
+  private static final Logger LOGGER = LoggerFactory.getLogger(ProductInformationClientImpl.class);
+
   @Override
   public String getProductTitle() {
     String response = null;
@@ -46,7 +50,7 @@ public String getProductTitle() {
         response = EntityUtils.toString(httpResponse.getEntity());
       }
     } catch (IOException e) {
-      e.printStackTrace();
+      LOGGER.error("Exception caught.", e);
     }
     return response;
   }

aggregator-microservices/aggregator-service/src/main/java/com/iluwatar/aggregator/microservices/ProductInventoryClientImpl.java

@@ -27,6 +27,8 @@
 import org.apache.http.impl.client.CloseableHttpClient;
 import org.apache.http.impl.client.HttpClients;
 import org.apache.http.util.EntityUtils;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
 import org.springframework.stereotype.Component;
 
 import java.io.IOException;
@@ -37,6 +39,8 @@
 @Component
 public class ProductInventoryClientImpl implements ProductInventoryClient {
 
+  private static final Logger LOGGER = LoggerFactory.getLogger(ProductInventoryClientImpl.class);
+
   @Override
   public int getProductInventories() {
     String response = "0";
@@ -46,7 +50,7 @@ public int getProductInventories() {
         response = EntityUtils.toString(httpResponse.getEntity());
       }
     } catch (IOException e) {
-      e.printStackTrace();
+      LOGGER.error("Exception caught.", e);
     }
     return Integer.parseInt(response);
   }

async-method-invocation/src/main/java/com/iluwatar/async/method/invocation/App.java

@@ -22,6 +22,9 @@
  */
 package com.iluwatar.async.method.invocation;
 
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
 import java.util.concurrent.Callable;
 
 /**
@@ -54,6 +57,8 @@
  */
 public class App {
 
+  private static final Logger LOGGER = LoggerFactory.getLogger(App.class);
+
   /**
    * Program entry point
    */
@@ -120,6 +125,6 @@ private static <T> AsyncCallback<T> callback(String name) {
   }
 
   private static void log(String msg) {
-    System.out.println(String.format("[%1$-10s] - %2$s", Thread.currentThread().getName(), msg));
+    LOGGER.info(msg);
   }
 }

bridge/src/main/java/com/iluwatar/bridge/Excalibur.java

@@ -22,30 +22,35 @@
  */
 package com.iluwatar.bridge;
 
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
 /**
  * 
  * Excalibur
  *
  */
 public class Excalibur extends BlindingMagicWeaponImpl {
 
+  private static final Logger LOGGER = LoggerFactory.getLogger(Excalibur.class);
+
   @Override
   public void wieldImp() {
-    System.out.println("wielding Excalibur");
+    LOGGER.info("wielding Excalibur");
   }
 
   @Override
   public void swingImp() {
-    System.out.println("swinging Excalibur");
+    LOGGER.info("swinging Excalibur");
   }
 
   @Override
   public void unwieldImp() {
-    System.out.println("unwielding Excalibur");
+    LOGGER.info("unwielding Excalibur");
   }
 
   @Override
   public void blindImp() {
-    System.out.println("bright light streams from Excalibur blinding the enemy");
+    LOGGER.info("bright light streams from Excalibur blinding the enemy");
   }
 }

bridge/src/main/java/com/iluwatar/bridge/Mjollnir.java

@@ -22,30 +22,35 @@
  */
 package com.iluwatar.bridge;
 
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
 /**
  * 
  * Mjollnir
  *
  */
 public class Mjollnir extends FlyingMagicWeaponImpl {
 
+  private static final Logger LOGGER = LoggerFactory.getLogger(Mjollnir.class);
+
   @Override
   public void wieldImp() {
-    System.out.println("wielding Mjollnir");
+    LOGGER.info("wielding Mjollnir");
   }
 
   @Override
   public void swingImp() {
-    System.out.println("swinging Mjollnir");
+    LOGGER.info("swinging Mjollnir");
   }
 
   @Override
   public void unwieldImp() {
-    System.out.println("unwielding Mjollnir");
+    LOGGER.info("unwielding Mjollnir");
   }
 
   @Override
   public void flyImp() {
-    System.out.println("Mjollnir hits the enemy in the air and returns back to the owner's hand");
+    LOGGER.info("Mjollnir hits the enemy in the air and returns back to the owner's hand");
   }
 }

bridge/src/main/java/com/iluwatar/bridge/Stormbringer.java

@@ -22,30 +22,35 @@
  */
 package com.iluwatar.bridge;
 
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
 /**
  * 
  * Stormbringer
  *
  */
 public class Stormbringer extends SoulEatingMagicWeaponImpl {
 
+  private static final Logger LOGGER = LoggerFactory.getLogger(Stormbringer.class);
+
   @Override
   public void wieldImp() {
-    System.out.println("wielding Stormbringer");
+    LOGGER.info("wielding Stormbringer");
   }
 
   @Override
   public void swingImp() {
-    System.out.println("swinging Stormbringer");
+    LOGGER.info("swinging Stormbringer");
   }
 
   @Override
   public void unwieldImp() {
-    System.out.println("unwielding Stormbringer");
+    LOGGER.info("unwielding Stormbringer");
   }
 
   @Override
   public void eatSoulImp() {
-    System.out.println("Stormbringer devours the enemy's soul");
+    LOGGER.info("Stormbringer devours the enemy's soul");
   }
 }

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

@@ -23,6 +23,8 @@
 package com.iluwatar.builder;
 
 import com.iluwatar.builder.Hero.Builder;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
 
 /**
  * 
@@ -50,6 +52,8 @@
  */
 public class App {
 
+  private static final Logger LOGGER = LoggerFactory.getLogger(App.class);
+
   /**
    * Program entry point
    * 
@@ -60,18 +64,18 @@ public static void main(String[] args) {
     Hero mage =
         new Hero.Builder(Profession.MAGE, "Riobard").withHairColor(HairColor.BLACK)
             .withWeapon(Weapon.DAGGER).build();
-    System.out.println(mage);
+    LOGGER.info(mage.toString());
 
     Hero warrior =
         new Hero.Builder(Profession.WARRIOR, "Amberjill").withHairColor(HairColor.BLOND)
             .withHairType(HairType.LONG_CURLY).withArmor(Armor.CHAIN_MAIL).withWeapon(Weapon.SWORD)
             .build();
-    System.out.println(warrior);
+    LOGGER.info(warrior.toString());
 
     Hero thief =
         new Hero.Builder(Profession.THIEF, "Desmond").withHairType(HairType.BALD)
             .withWeapon(Weapon.BOW).build();
-    System.out.println(thief);
+    LOGGER.info(thief.toString());
 
   }
 }