func main() {
profile := flag.Bool("p", false, "write profiles to ./")
train := flag.String("t", "", "train using the data in this file")
evaluate := flag.String("e", "", "evaluate using the data in this file")
ngram := flag.Int("n", 2, "ngram length")
corpus := flag.String("c", "review_polarity", "corpus name")
flag.Parse()
trainData := make(chan *model.Datum, 100)
evalData := make(chan *model.Datum, 100)
quit := make(chan bool)
pool := store.NewPool(store.NewRedisStore)
nb := model.NewNGramModel(pool.Get(*corpus), *ngram)
quitServer := make(chan bool)
go ServeDebug()
go Serve(pool, quitServer)
if *train != "" {
fmt.Println("Training on", *train)
f, _ := os.Open(*train)
go ReadData(bufio.NewReader(f), trainData, quit)
go func() {
for d := range trainData {
nb.Train(d)
}
}()
<-quit
}
if *evaluate != "" {
fmt.Println("Evaluating on", *evaluate)
f, _ := os.Open(*evaluate)
go ReadData(bufio.NewReader(f), evalData, quit)
go Evaluate(evalData, nb)
}
if *profile {
DumpProfiles()
}
<-quit
<-quitServer
}
func (h TrainHandler) ServeHTTP(w http.ResponseWriter, req *http.Request) {
req.ParseForm()
query := req.FormValue("q")
class := req.FormValue("class")
corpus := req.FormValue("corpus")
n, err := strconv.Atoi(req.FormValue("n"))
if err != nil {
n = 2
}
count, err := strconv.Atoi(req.FormValue("count"))
if err != nil {
count = 1
}
m := model.NewNGramModel(h.pool.Get(corpus), n)
features := strings.Split(query, ",")
d := &model.Datum{class, features, int64(count)}
m.Train(d)
return
}
// ServeHTTP classifies
func (h ClassifyHandler) ServeHTTP(w http.ResponseWriter, req *http.Request) {
req.ParseForm()
query := req.FormValue("q")
corpus := req.FormValue("corpus")
n, err := strconv.Atoi(req.FormValue("n"))
if err != nil {
n = 2
}
fmt.Println(req)
m := model.NewNGramModel(h.pool.Get(corpus), n)
features := strings.Split(query, " ")
estimator, explain := m.Classify(features)
prediction, _ := distribution.ArgMax(estimator)
output := map[string]interface{}{
"prediction": prediction,
"estimator": distribution.JSON(estimator),
"explain": explain,
}
jsonBytes, _ := json.MarshalIndent(output, "", "\t")
w.Write(jsonBytes)
return
}
