ArcGIS API for JavaScript ^3.29

var layerDefinition = {
  "geometryType": "esriGeometryPoint",
  "fields": [{
    name: "ObjectId",
    type: "esriFieldTypeOID",
    alias: "ObjectId"
  }, {
    name: "AltitudeFeet",
    type: "esriFieldTypeDouble",
    alias: "AltitudeFeet"
  }, {
    name: "ACID",
    type: "esriFieldTypeString",
    alias: "Aircraft ID"
  }]
};

var featureCollection = {
  layerDefinition: layerDefinition,
  featureSet: null
};

var layer = new esri.layers.StreamLayer(featureCollection, {
  socketUrl: "ws://ec2-54-224-125-57.compute-1.amazonaws.com:8080/faatrackinfo",
  purgeOptions: {
    displayCount: 1000
  }
};

var isVisible = layer.defaultVisibility;

• Setting the layer ID in the layer constructor.

  population = new esri.layers.ArcGISDynamicMapServiceLayer("http://myserver/arcgis/rest/population/MapServer/Layers", {id:"population"});
  

• Setting the layer ID after a layer is initialized.

  population.id = "population";

• Retrieving the layer ID.

  function getMapLayers() {
    for (var j=0, jl=myMap.layerIds.length; j<jl; j++) {
      var currentLayer = myMap.getLayer(myMap.layerIds[j]);
      alert("id: " + currentLayer.id);
    }
  }
  

//override websocket onmessage event
layer.on("Connect", function() {
  console.log("CONNECTED SOCKET: ", layer);
  setTimeout(function() {
    layer.socket.onmessage = function(e) {
      //parse json
      var msgarray = JSON.parse(e.data);
      msgarray = Array.isArray(msgarray) ? msgarray : [msgarray];
      for (var i = 0; i < msgarray.length; i++){
        //make graphic
        var jsonFeature = msgarray[i];
        var graphic = new Graphic();
        var geom = jsonUtils.fromJson(jsonFeature.geometry);
        graphic.setGeometry(geom);
        graphic.setAttributes(jsonFeature.attributes);
        graphic.setSymbol(sym);
        layer.add(graphic);
      }
    };
  }, 25);
});

var templates = layer.templates;

dojo.forEach(templates,function(template){

   console.log(template.description);

   console.log(template.name);

});

function addGraphic(geometry) {
  var symbol = new esri.symbol.SimpleFillSymbol();
  graphicsLayer.add(new esri.Graphic(geometry, symbol));
}

graphicsLayer.clear();

timeSlider.createTimeStopsByTimeInterval(featureLayer.getTimeDefinition(), 

  1, esri.layers.TimeInfo.UNIT_HOURS);

featureLayer.setDefinitionExpression("STATE_NAME = 'South Carolina'");

  var template = new esri.InfoTemplate();

  template.setTitle("${qAddress}");

  template.setContent(getTextContent);

  featureLayer.setInfoTemplate(template);

featureLayer.setOpacity(.50);

var symbol = new esri.symbol.SimpleFillSymbol().setColor(new esri.Color([255,0,0,0.5]));

var renderer = new esri.renderer.SimpleRenderer(symbol);

featureLayer.setRenderer(renderer);

featureLayer.setScaleRange(591657528,147914381);

var selectionSymbol = new esri.symbol.SimpleFillSymbol().setColor(new esri.Color([255,255,0,0.5]));
featureLayer.setSelectionSymbol(selectionSymbol);

layer.setWebGLEnabled(true);