Mongodb Java Connector Class

src/main/java/com/camillepradel/movierecommender/controller/MongoDBConnector.java

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+/*
+ * To change this license header, choose License Headers in Project Properties.
+ * To change this template file, choose Tools | Templates
+ * and open the template in the editor.
+ */
+package com.camillepradel.movierecommender.controller;
+
+import com.mongodb.MongoClient;
+import com.mongodb.client.MongoDatabase;
+
+/**
+ *
+ * @author sidya
+ */
+public class MongoDBConnector {
+    private static MongoDBConnector instance = null;
+    private MongoClient c ;
+    private MongoDatabase db;
+   
+    private MongoDBConnector() {
+        this.c = new MongoClient("localhost",27017);
+        this.db = c.getDatabase("movies");
+    }
+   
+    public static MongoDBConnector getInstance() {
+       if(instance == null) {
+          instance = new MongoDBConnector();
+       }
+       return instance;
+    }
+    
+    public MongoDatabase getConnexion() {
+        if (this.db == null || this.c == null)
+            MongoDBConnector.getInstance();
+        return this.db;
+    }
+    
+    public void close() {
+        this.c.close();
+        this.db = null;
+        this.c=null;
+    }
+}