[OpenLayers-Users] refresh vector layer

[Reem]

I use openlayers with geoservers layers .

currently, my problem is with refreshing vector layer that used WFS protocl
and cql_filter,
as below:

Layer2 = new OpenLayers.Layer.Vector("layer2", { 
protocol:new OpenLayers.Protocol.WFS.v1_1_0({          
                   url: GeoServerURL,				   
                   featureType: "layer2", 
				   featureNS: "http://mapmap.org", 
				   srsName: "EPSG:3857", 
                   version: "1.1.0", 
                   extractAttributes: true, 
                   isBaseLayer: false, 
                   visibility: true 
               }),
	 maxExtent: new OpenLayers.Bounds(-180, -90, 180,
90).transform(geographic,mercator),
         displayOutsideMaxExtent: true, 
         displayInLayerSwitcher: false 

		 });

 Layer2.addOptions({id:'Layer2'});
 
Layer2.protocol.read({            
    filter: c_filter,   					 
    callback: processTheQuery , 
 scope: [new OpenLayers.Strategy.Fixed({preload: true})]
         });

when I add new feature to geoserver layer I want to refresh this layer to
get the new feature,
I triyed many ways but nothing happen with no errors!
like:

1:
map.getLayer('Layer2').protocol.setFeatureType("layer2"); 
map.getLayer('Layer2').refresh({featureType: "layer2",force: true});

2 :
map.getLayer('Layer2').protocol.update();

3:
map.getLayer('Layer2').refresh({ force: true, params: { 'key':
Math.random()} });

4:
map.removeLayer(Layer2);
map.addLayer(Layer2);


any help ?



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