GeoIPV2 Sample

GeoIpApiV2.java

public class GeoIpApiV2 
{
    public  static final Logger logger = LogManager.getLogger(GeoIpApiV2.class.getName());
    
    private DatabaseReader cityReader;
    private DatabaseReader ispReader;

    public    static String lastGeoIPPath;
    public    static String lastGeoIPSubPath;
    
    private static class InstanceHolder
    {
        public static final GeoIpApiV2 instance = new GeoIpApiV2();
    }
    
    public static GeoIpApiV2 getInstance()
    {
        return InstanceHolder.instance;
    }

    private GeoIpApiV2()
    {
        try 
        {
            // A File object pointing to your GeoIP2 or GeoLite2 database
            File databaseCity = new File ( ConfigGeoIP.MAXMIND_GEOIP_VER2_PATH + ConfigGeoIP.MAXMIND_GEOIP_VER2_DATE_SUBPATH + "GeoIP2-City.mmdb" );
            File databaseISP  = new File ( ConfigGeoIP.MAXMIND_GEOIP_VER2_PATH + ConfigGeoIP.MAXMIND_GEOIP_VER2_DATE_SUBPATH + "GeoIP2-ISP.mmdb" );

            // This creates the DatabaseReader object, which should be reused across lookups.
            this.cityReader = new DatabaseReader.Builder(databaseCity).fileMode(Reader.FileMode.MEMORY).build();
            this.ispReader  = new DatabaseReader.Builder(databaseISP).fileMode(Reader.FileMode.MEMORY).build();

            // Change last values
            GeoIpApiV2.lastGeoIPPath      = ConfigGeoIP.MAXMIND_GEOIP_VER2_PATH;
            GeoIpApiV2.lastGeoIPSubPath   = ConfigGeoIP.MAXMIND_GEOIP_VER2_DATE_SUBPATH;
        } 
        catch (IOException e) 
        {
            logger.error(e);
        }
    }

    public void reloadGeoIPServices ()
    {
        try
        {
            // A File object pointing to your GeoIP2 or GeoLite2 database
            File databaseCity = new File ( ConfigGeoIP.MAXMIND_GEOIP_VER2_PATH + ConfigGeoIP.MAXMIND_GEOIP_VER2_DATE_SUBPATH + "GeoIP2-City.mmdb" );
            File databaseISP  = new File ( ConfigGeoIP.MAXMIND_GEOIP_VER2_PATH + ConfigGeoIP.MAXMIND_GEOIP_VER2_DATE_SUBPATH + "GeoIP2-ISP.mmdb" );

            // Local readers
            DatabaseReader localCityReader;
            DatabaseReader localIspReader;

            // This creates the DatabaseReader object, which should be reused across lookups.
            localCityReader = new DatabaseReader.Builder(databaseCity).fileMode(Reader.FileMode.MEMORY).build();
            localIspReader  = new DatabaseReader.Builder(databaseISP).fileMode(Reader.FileMode.MEMORY).build();

            // Change last values
            GeoIpApiV2.lastGeoIPPath      = ConfigGeoIP.MAXMIND_GEOIP_VER2_PATH;
            GeoIpApiV2.lastGeoIPSubPath   = ConfigGeoIP.MAXMIND_GEOIP_VER2_DATE_SUBPATH;

            // Replace geoip libs
            this.cityReader = localCityReader;
            this.ispReader  = localIspReader;
        }
        catch (IOException e)
        {
            logger.error(e);
        }
    }
    
    public IspResponse getIspResponse ( String currentIp )
    {
        try
        {
            InetAddress ipAddress = InetAddress.getByName(currentIp);
            IspResponse response  = ispReader.isp(ipAddress);
            
            return response;
        }
        catch ( Exception e ) {}
        
        return null;
    }
    
    public IspResponse getIspResponse ( InetAddress ipAddress )
    {
        try
        {
            IspResponse response  = ispReader.isp(ipAddress);
            
            return response;
        }
        catch ( Exception e ) {}
        
        return null;
    }
    
    public CityResponse getCityResponse ( String currentIp )
    {
        try
        {
            InetAddress ipAddress = InetAddress.getByName(currentIp);
            CityResponse response = cityReader.city(ipAddress);
            
            return response;
        }
        catch ( Exception e ) {}
        
        return null;
    }
    
    public CityResponse getCityResponse ( InetAddress ipAddress )
    {
        try
        {
            CityResponse response = cityReader.city(ipAddress);
            
            return response;
        }
        catch ( Exception e ) {}
        
        return null;
    }
 
}

Sample.java

public class Sample
{
    public static void main ( String[] args )
    {
        String ip = "137.21.32.42";

        System.out.println("ASN Number: " + GeoIpApiV2.getInstance().getIspResponse(ip).getAutonomousSystemNumber());
    } 
}