Merge pull request iluwatar#563 from sunilmogadati/SonarQubeBlockerBugs

iluwatar#507 SonarQube blocker severity bugs

Author: iluwatar

model-view-presenter/src/main/java/com/iluwatar/model/view/presenter/FileLoader.java

@@ -48,8 +48,7 @@ public class FileLoader {
    * Loads the data of the file specified.
    */
   public String loadData() {
-    try {
-      BufferedReader br = new BufferedReader(new FileReader(new File(this.fileName)));
+    try (BufferedReader br = new BufferedReader(new FileReader(new File(this.fileName)))) {
       StringBuilder sb = new StringBuilder();
       String line;
 
@@ -58,7 +57,6 @@ public String loadData() {
       }
 
       this.loaded = true;
-      br.close();
 
       return sb.toString();
     } catch (Exception e) {

queue-load-leveling/src/main/java/com/iluwatar/queue/load/leveling/ServiceExecutor.java

@@ -35,27 +35,27 @@
 public class ServiceExecutor implements Runnable {
 
   private static final Logger LOGGER = LoggerFactory.getLogger(App.class);
-  
+
   private final MessageQueue msgQueue;
 
   public ServiceExecutor(MessageQueue msgQueue) {
     this.msgQueue = msgQueue;
   }
-  
+
   /**
    * The ServiceExecutor thread will retrieve each message and process it.
    */
   public void run() {
     try {
-      while (true) {
+      while (!Thread.currentThread().isInterrupted()) {
         Message msg = msgQueue.retrieveMsg();
-        
+
         if (null != msg) {
           LOGGER.info(msg.toString() + " is served.");
         } else {
           LOGGER.info("Service Executor: Waiting for Messages to serve .. ");
         }
-        
+
         Thread.sleep(1000);
       }
     } catch (InterruptedException ie) {

service-layer/src/main/java/com/iluwatar/servicelayer/common/DaoBaseImpl.java

@@ -27,6 +27,7 @@
 
 import org.hibernate.Criteria;
 import org.hibernate.Session;
+import org.hibernate.SessionFactory;
 import org.hibernate.Transaction;
 import org.hibernate.criterion.Restrictions;
 
@@ -45,13 +46,17 @@ public abstract class DaoBaseImpl<E extends BaseEntity> implements Dao<E> {
   protected Class<E> persistentClass = (Class<E>) ((ParameterizedType) getClass()
       .getGenericSuperclass()).getActualTypeArguments()[0];
 
-  protected Session getSession() {
-    return HibernateUtil.getSessionFactory().openSession();
+  /*
+   * Making this getSessionFactory() instead of getSession() so that it is the responsibility
+   * of the caller to open as well as close the session (prevents potential resource leak).
+   */
+  protected SessionFactory getSessionFactory() {
+    return HibernateUtil.getSessionFactory();
   }
 
   @Override
   public E find(Long id) {
-    Session session = getSession();
+    Session session = getSessionFactory().openSession();
     Transaction tx = null;
     E result = null;
     try {
@@ -73,7 +78,7 @@ public E find(Long id) {
 
   @Override
   public void persist(E entity) {
-    Session session = getSession();
+    Session session = getSessionFactory().openSession();
     Transaction tx = null;
     try {
       tx = session.beginTransaction();
@@ -91,7 +96,7 @@ public void persist(E entity) {
 
   @Override
   public E merge(E entity) {
-    Session session = getSession();
+    Session session = getSessionFactory().openSession();
     Transaction tx = null;
     E result = null;
     try {
@@ -111,7 +116,7 @@ public E merge(E entity) {
 
   @Override
   public void delete(E entity) {
-    Session session = getSession();
+    Session session = getSessionFactory().openSession();
     Transaction tx = null;
     try {
       tx = session.beginTransaction();
@@ -129,7 +134,7 @@ public void delete(E entity) {
 
   @Override
   public List<E> findAll() {
-    Session session = getSession();
+    Session session = getSessionFactory().openSession();
     Transaction tx = null;
     List<E> result = null;
     try {

service-layer/src/main/java/com/iluwatar/servicelayer/spell/SpellDaoImpl.java

@@ -38,7 +38,7 @@ public class SpellDaoImpl extends DaoBaseImpl<Spell> implements SpellDao {
 
   @Override
   public Spell findByName(String name) {
-    Session session = getSession();
+    Session session = getSessionFactory().openSession();
     Transaction tx = null;
     Spell result = null;
     try {

service-layer/src/main/java/com/iluwatar/servicelayer/spellbook/SpellbookDaoImpl.java

@@ -38,7 +38,7 @@ public class SpellbookDaoImpl extends DaoBaseImpl<Spellbook> implements Spellboo
 
   @Override
   public Spellbook findByName(String name) {
-    Session session = getSession();
+    Session session = getSessionFactory().openSession();
     Transaction tx = null;
     Spellbook result = null;
     try {

service-layer/src/main/java/com/iluwatar/servicelayer/wizard/WizardDaoImpl.java

@@ -39,7 +39,7 @@ public class WizardDaoImpl extends DaoBaseImpl<Wizard> implements WizardDao {
 
   @Override
   public Wizard findByName(String name) {
-    Session session = getSession();
+    Session session = getSessionFactory().openSession();
     Transaction tx = null;
     Wizard result = null;
     try {

tolerant-reader/src/main/java/com/iluwatar/tolerantreader/RainbowFishSerializer.java

@@ -52,11 +52,10 @@ public static void writeV1(RainbowFish rainbowFish, String filename) throws IOEx
     map.put("age", String.format("%d", rainbowFish.getAge()));
     map.put("lengthMeters", String.format("%d", rainbowFish.getLengthMeters()));
     map.put("weightTons", String.format("%d", rainbowFish.getWeightTons()));
-    FileOutputStream fileOut = new FileOutputStream(filename);
-    ObjectOutputStream objOut = new ObjectOutputStream(fileOut);
-    objOut.writeObject(map);
-    objOut.close();
-    fileOut.close();
+    try (FileOutputStream fileOut = new FileOutputStream(filename);
+        ObjectOutputStream objOut = new ObjectOutputStream(fileOut)) {
+      objOut.writeObject(map);
+    }
   }
 
   /**
@@ -71,23 +70,24 @@ public static void writeV2(RainbowFishV2 rainbowFish, String filename) throws IO
     map.put("angry", Boolean.toString(rainbowFish.getAngry()));
     map.put("hungry", Boolean.toString(rainbowFish.getHungry()));
     map.put("sleeping", Boolean.toString(rainbowFish.getSleeping()));
-    FileOutputStream fileOut = new FileOutputStream(filename);
-    ObjectOutputStream objOut = new ObjectOutputStream(fileOut);
-    objOut.writeObject(map);
-    objOut.close();
-    fileOut.close();
+    try (FileOutputStream fileOut = new FileOutputStream(filename);
+        ObjectOutputStream objOut = new ObjectOutputStream(fileOut)) {
+      objOut.writeObject(map);
+    }
   }
 
   /**
    * Read V1 RainbowFish from file
    */
   public static RainbowFish readV1(String filename) throws IOException, ClassNotFoundException {
-    FileInputStream fileIn = new FileInputStream(filename);
-    ObjectInputStream objIn = new ObjectInputStream(fileIn);
-    Map<String, String> map = (Map<String, String>) objIn.readObject();
-    objIn.close();
-    fileIn.close();
-    return new RainbowFish(map.get("name"), Integer.parseInt(map.get("age")), Integer.parseInt(map
-        .get("lengthMeters")), Integer.parseInt(map.get("weightTons")));
+    Map<String, String> map = null;
+
+    try (FileInputStream fileIn = new FileInputStream(filename);
+        ObjectInputStream objIn = new ObjectInputStream(fileIn)) {
+      map = (Map<String, String>) objIn.readObject();
+    }
+
+    return new RainbowFish(map.get("name"), Integer.parseInt(map.get("age")), Integer.parseInt(map.get("lengthMeters")),
+        Integer.parseInt(map.get("weightTons")));
   }
 }