connector

src/main/java/com/camillepradel/movierecommender/controller/Neo4jConnector.java

@@ -0,0 +1,62 @@
+/*
+ * 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 java.net.ConnectException;
+import org.neo4j.driver.v1.*;
+import org.neo4j.driver.v1.exceptions.Neo4jException;
+
+/**
+ *
+ * @author renando
+ */
+public class Neo4jConnector {
+
+    
+    private static Neo4jConnector INSTANCE = null;
+    private static Session session = null;
+    private static Driver driver = null;
+
+    private Neo4jConnector() {
+
+    }  
+
+    public static synchronized Neo4jConnector getInstance()
+    {			
+            if (INSTANCE == null)
+            { 
+                INSTANCE = new Neo4jConnector();
+                driver = GraphDatabase.driver( "bolt://localhost", AuthTokens.basic( "neo4j", "root1234" ) );
+                session = driver.session();
+            }
+            return INSTANCE;
+    }
+
+    public Session getConnection() throws ConnectException {
+        if (session == null || driver == null){
+            Neo4jConnector.getInstance();
+        }
+        return this.session;
+    }
+
+    public boolean close() throws ConnectException {
+            boolean etat = false;
+            if (session != null) {
+                    try {
+                        session.close();
+                        driver.close();
+                        etat = true;
+                    } catch (Neo4jException e) {
+                        etat = false;
+                    }
+            } else {
+                    throw new ConnectException();
+
+            }
+
+            return etat;
+    }
+
+}