func main() {
// sets the maximum number of CPUs that can be executing simultaneously
runtime.GOMAXPROCS(runtime.NumCPU())
// override defaults via env vars
if os.Getenv("ES_HOST") != "" {
esHost = os.Getenv("ES_HOST")
}
if os.Getenv("ES_PORT") != "" {
esPort = os.Getenv("ES_PORT")
}
if os.Getenv("REDIS_HOST") != "" {
redisHost = os.Getenv("REDIS_HOST")
}
if os.Getenv("REDIS_PORT") != "" {
redisPort = os.Getenv("REDIS_PORT")
}
if os.Getenv("PUBLIC_DIR") != "" {
publicDir = os.Getenv("PUBLIC_DIR")
}
// log endpoints
log.Infof("Redis endpoint set to %s:%s", redisHost, redisPort)
log.Infof("Elasticsearch endpoint set to %s:%s", esHost, esPort)
// register available tiling types
tile.Register("heatmap", elastic.NewHeatmapTile(esHost, esPort))
tile.Register("topic_count", elastic.NewTopCountTile(esHost, esPort))
// register available meta data types
meta.Register("default", elastic.NewDefaultMeta(esHost, esPort))
// register available store types
store.Register("redis", redis.NewConnection(redisHost, redisPort))
// create server
app := api.New(publicDir)
// catch kill signals for graceful shutdown
graceful.AddSignal(syscall.SIGINT, syscall.SIGTERM)
// start server
log.Infof("Prism server listening on port %s", port)
err := graceful.ListenAndServe(":"+port, app)
if err != nil {
log.Error(err)
}
// wait until server gracefully exits
graceful.Wait()
}
// New returns a new Goji Mux handler to process HTTP requests.
func New(publicDir string) http.Handler {
r := web.New()
// mount logger middleware
r.Use(middleware.Log)
// mount gzip middleware
r.Use(middleware.Gzip)
// meta dispatching websocket handler
log.Infof("Meta-Dispatch route: '%s'", dispatch.MetaRoute)
r.Get(dispatch.MetaRoute, dispatch.MetaHandler)
// tile dispatching websocket handler
log.Infof("Tile-Dispatch route: '%s'", dispatch.TileRoute)
r.Get(dispatch.TileRoute, dispatch.TileHandler)
// tile request handler
log.Infof("Tile route: '%s'", tile.Route)
r.Post(tile.Route, tile.Handler)
// metadata request handler
log.Infof("Meta route: '%s'", meta.Route)
r.Get(meta.Route, meta.Handler)
// add greedy route last
r.Get("/*", http.FileServer(http.Dir(publicDir)))
return r
}