Fix bugs and refactor code

Co-authored-by: LucasCatolino <lcatolino@fi.uba.ar>
Co-authored-by: KuJo7 <joel.k2010@gmail.com>

src/main/java/edu/uastw/App.java

@@ -14,10 +14,9 @@ import java.util.Iterator;
 
 @IgnoreCoverage
 public class App {
-
     /***************** Resilience variables *****************/
     private static final int RETRY_ATTEMPTS = 2;
-    private static final double LIBRARY_OPEN_CONDITION = 0.5;
+    private static final double LIBRARY_OPEN_CONDITION = 0;
     private static final int TIME_MULTIPLIER = 3000;
     private static final int RATE_LIMIT = 2;
     private static final int TIMEOUT = 1000;
@@ -57,21 +56,29 @@ public class App {
 
         try {
             library.addLibraryItem(book1);
+            printSeparator();
             library.addLibraryItem(book2);
+            printSeparator();
             library.addLibraryItem(book3);
+            printSeparator();
             library.addLibraryItem(magazine1);
+            printSeparator();
         } catch (Exception e) {
-            e.printStackTrace();
+            System.out.println(e.getMessage());
         }
         
+        printSeparator();
         library.displayLibraryItems();
+        printSeparator();
         library.displayLibraryItems();
+        printSeparator();
         library.displayLibraryItems();
+        printSeparator();
 
         try {
             Thread.sleep(INTERVAL + 5);
         } catch (InterruptedException e) {
-            e.printStackTrace();
+            System.out.println(e.getMessage());
         }
 
         library.displayLibraryItems();
@@ -79,42 +86,46 @@ public class App {
 
         LibraryDecorator increasedCapacityLibrary = new IncreaseBooksCapacityDecorator(library, 1);
         increasedCapacityLibrary.extendedFunctionality();
+        printSeparator();
 
         try {
 			library.addLibraryItem(magazine1);
 		} catch (Exception e) {
-            System.out.println("Add library item error");
-			e.printStackTrace();
+            System.out.println(e.getMessage());
 		}
         
+        printSeparator();
         library.displayLibraryItems();
         printSeparator();
 
         LibraryDecorator decreasedCapacityLibrary = new DecreaseBooksCapacityDecorator(library, 2);
         decreasedCapacityLibrary.extendedFunctionality();
+        printSeparator();
 
         try {
 			library.addLibraryItem(magazine1);
+            printSeparator();
 		} catch (Exception e) {
-            System.out.println("Add library item error");
-			e.printStackTrace();
+            System.out.println(e.getMessage());
 		}
-        library.iterator().forEachRemaining(x -> System.out.println(x.getTitle() + " by " + x.getOwner()));
+
+        library.iterator().forEachRemaining(System.out::println);
         printSeparator();
 
         Iterator<LibraryItem> bookIterator = library.customTypeIterator(ItemType.BOOK);
         System.out.println("Books available in the library:");
-        bookIterator.forEachRemaining(x -> System.out.println(x.getTitle() + " by " + x.getOwner()));
+        bookIterator.forEachRemaining(System.out::println);
         printSeparator();
 
         Iterator<LibraryItem> magazineIterator = library.customTypeIterator(ItemType.MAGAZINE);
         System.out.println("Magazines available in the library:");
-        magazineIterator.forEachRemaining(x -> System.out.println(x.getTitle() + " by " + x.getOwner()));
+        magazineIterator.forEachRemaining(System.out::println);
+        printSeparator();
 
         try {
             library.removeLibraryItem(book1);
         } catch (Exception e) {
-            e.printStackTrace();
+            System.out.println(e.getMessage());
         }
     }
 

src/main/java/edu/uastw/library/Library.java

@@ -107,12 +107,12 @@ public class Library implements Iterable<LibraryItem> {
             try {
                 Thread.sleep(random);
             } catch (InterruptedException e) {
-                e.printStackTrace();
+                System.out.println(e.getMessage());
             }
             if (libraryItems.size() > 0) {
                 libraryItems.remove(item);
             } else {
-                System.out.println("Library is full");
+                System.out.println("Library is empty");
             }
         }, timeout);
     }
@@ -137,9 +137,7 @@ public class Library implements Iterable<LibraryItem> {
 
         if (tokens > 0) {
             System.out.println("Items available in the library:");
-            libraryItems.forEach(libraryItem ->
-                    System.out.println(libraryItem.getTitle() + " by " + libraryItem.getOwner())
-            );
+            libraryItems.forEach(System.out::println);
             tokens--;
             lastAccessTime = currentTime;
         } else {

src/main/java/edu/uastw/library/exceptions/LibraryClosedException.java

@@ -1,8 +1,7 @@
 package edu.uastw.library.exceptions;
 
 public class LibraryClosedException extends Exception {
-
-    public LibraryClosedException(String string) {
-        //TODO Auto-generated constructor stub
+    public LibraryClosedException(String message) {
+        super(message);
     }
 }

src/main/java/edu/uastw/library/exceptions/LibraryFullException.java

@@ -1,9 +1,7 @@
 package edu.uastw.library.exceptions;
 
 public class LibraryFullException extends Exception {
-
-    public LibraryFullException(String string) {
-        //TODO Auto-generated constructor stub
+    public LibraryFullException(String message) {
+        super(message);
     }
-    
 }

src/main/java/edu/uastw/library/interfaces/LibraryItem.java

@@ -6,4 +6,8 @@ public interface LibraryItem {
     String getTitle();
     String getOwner();
     ItemType getType();
+
+    default String defaultToString() {
+        return getTitle() + " by " + getOwner();
+    }
 }

src/main/java/edu/uastw/library/items/Book.java

@@ -26,6 +26,11 @@ public class Book implements LibraryItem {
         return ItemType.BOOK;
     }
 
+    @Override
+    public String toString() {
+        return defaultToString();
+    }
+
     public static class Builder {
         private String title;
         private String author;

src/main/java/edu/uastw/library/items/Magazine.java

@@ -26,6 +26,11 @@ public class Magazine implements LibraryItem {
         return ItemType.MAGAZINE;
     }
 
+    @Override
+    public String toString() {
+        return defaultToString();
+    }
+
     public static class Builder {
         private String title;
         private String publisher;