CONNECTIONTYPE postgis
        CONNECTION "dbname=water host=127.0.0.1 port=5432 user=water_dba password=<your-db-password> "
        DATA "geom FROM meters_quality USING UNIQUE meter_num USING srid=2039"
        METADATA
                "wfs_title"     "Water Meters"
                "wfs_onlineresource" "<your-url-to-mapfile"
                "wfs_srs"       "EPSG:4326"
                "wfs_enable_request"    "*"
                "wfs_abstract"  "Water Meters"
                'ows_title' 'meters'
        END

var metersSource = new ol.source.Vector({
        format: new ol.format.WFS({
                featureNS: "http://mapserver.gis.umn.edu/mapserver",
                featureType: "meters",
                featurePrefix: "ms"
        }),

        loader: function(extent,resolution,projection) {
                var url = '<your-url-to-mapfile&>' +
                'service=WFS&request=GetFeature&typename=meters&srsname=EPSG:4326&' +
                'version=1.1.0&' + extent.join(',') +',EPSG:3857';

                $.ajax({ url: url }).done(function(resp) {
                        fWFS = new ol.format.WFS(),
                        metersSource.addFeatures(fWFS.readFeatures(resp));
                 });
        },
        strategy: ol.loadingstrategy.tile(new ol.tilegrid.createXYZ({
                maxZoom: 19})),
});

var metersStyle = new ol.style.Style({
        image: new ol.style.Circle({
            radius: 6,
            fill: new ol.style.Fill({
                color: 'rgba(255,255,255,0.2)',
            }),
            stroke: new ol.style.Stroke({
                color: 'rgba(0,0,255,0.6)',
                width: 2,
            })
        })
});

var metersVector = new ol.layer.Vector ({
        source: metersSource,
            style: metersStyle,
});