com.bdnc.ecommercebdnc.dao.MongoConnection.java Source code

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Here is the source code for com.bdnc.ecommercebdnc.dao.MongoConnection.java

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package com.bdnc.ecommercebdnc.dao;

import com.mongodb.DB;
import com.mongodb.Mongo;
import java.net.UnknownHostException;

/**
 *
 * @author marcelo
 */
public class MongoConnection {

    private static final String HOST = "localhost";
    private static final int PORT = 27017;
    private static final String DB_NAME = "ecommerce-bdnc";

    private static MongoConnection uniqInstance;
    private static int mongoInstance = 1;

    private Mongo mongo;
    private DB db;

    private MongoConnection() {
        //construtor privado
    }

    //garante sempre uma unica instancia
    public static synchronized MongoConnection getInstance() {
        if (uniqInstance == null) {
            uniqInstance = new MongoConnection();
        }
        return uniqInstance;
    }

    //garante um unico objeto mongo
    public DB getDB() {
        if (mongo == null) {
            mongo = new Mongo(HOST, PORT);
            db = mongo.getDB(DB_NAME);
            System.out.println("Mongo instance equals :> " + mongoInstance++);
        }
        return db;
    }
}