Example of S3TileMapServiceLayer class using the ArcGIS Javascript API, with a configurable definition for the map service details.

S3TiledMapServiceLayerConfigurableDefinition.js

dojo.require("esri.map");
dojo.require("esri.layers.tiled");
dojo.require("dojo/string");
 
var map;
 
function init() {
 
    dojo.declare("S3TiledMapServiceLayer", esri.layers.TiledMapServiceLayer, {
 
        constructor: function(externalS3TileCacheUrl, serviceDetails) {
        
            this._s3TileUrl = externalS3TileCacheUrl;
        
            this.spatialReference = serviceDetails.spatialReference;
            this.initialExtent = serviceDetails.initialExtent;
            this.fullExtent = serviceDetails.fullExtent;
            
            this.tileInfo = new esri.layers.TileInfo(serviceDetails.tileInfo);                    
            
            this.loaded = true;
            this.onLoad(this);
 
        },  // constructor       
    
        getTileUrl: function(level, row, col) {
            return this._s3TileUrl
                    + "/L" + dojo.string.pad(level.toString(), 2, '0')
                    + "/R" + dojo.string.pad(row.toString(16), 8, '0')
                    + "/C" + dojo.string.pad(col.toString(16), 8, '0')
                    + ".png";
        } // getTileUrl
    
    });
 
    var initExtent = new esri.geometry.Extent({ "xmin": 152.260192894019, "ymin": -27.6147957518947, "xmax": 153.686679767014, "ymax": -26.9985153513847, "spatialReference": { "wkid": 4283} });
    map = new esri.Map("map",{extent:initExtent});
 
    var serviceDetails = {
        "spatialReference" : {
            "wkid" : 4283
        },
        "tileInfo" : {
            "rows" : 256, 
            "cols" : 256, 
            "dpi" : 96, 
            "format" : "PNG32", 
            "compressionQuality" : 0, 
            "origin" : {
                "x" : -400, 
                "y" : 9006799.25474099
            }, 
            "spatialReference" : {
                "wkid" : 4283
            }, 
            "lods" : [
                {"level" : 0, "resolution" : 4.75892201166056E-05, "scale" : 20000}, 
                {"level" : 1, "resolution" : 3.56919150874542E-05, "scale" : 15000}, 
                {"level" : 2, "resolution" : 2.37946100583028E-05, "scale" : 10000}
            ]
        }, 
        "initialExtent" : {
            "xmin" : 152.260192894019, 
            "ymin" : -27.6147957518947, 
            "xmax" : 153.686679767014, 
            "ymax" : -26.9985153513847, 
            "spatialReference" : {
                "wkid" : 4283
            }
        },
        "fullExtent" : {
            "xmin" : 137.994646199563, 
            "ymin" : -29.178663414, 
            "xmax" : 153.551849592, 
            "ymax" : -9.08799055699995, 
            "spatialReference" : {
                "wkid" : 4283
            }
        }           
    };            
    
    var tiledLayer = new S3TiledMapServiceLayer("https://<S3_BUCKET>.s3.amazonaws.com/_alllayers", serviceDetails);
    map.addLayer(tiledLayer);
 
    dojo.connect(map, 'onLoad', function(theMap) {
        //resize the map when the browser resizes
        dojo.connect(window, 'resize', map,map.resize);
    });
}
 
dojo.addOnLoad(init);