1 files changed, 97 insertions, 0 deletions
diff --git a/vendor/gopkg.in/throttled/throttled.v1/examples/memstats/main.go b/vendor/gopkg.in/throttled/throttled.v1/examples/memstats/main.go
new file mode 100644
index 000000000..50d4cc69b
--- /dev/null
+++ b/vendor/gopkg.in/throttled/throttled.v1/examples/memstats/main.go
@@ -0,0 +1,97 @@
+package main
+
+import (
+	"flag"
+	"fmt"
+	"io/ioutil"
+	"log"
+	"math/rand"
+	"net/http"
+	"runtime"
+	"sync"
+	"time"
+
+	"gopkg.in/throttled/throttled.v1"
+)
+
+var (
+	numgc    = flag.Int("gc", 0, "number of GC runs")
+	mallocs  = flag.Int("mallocs", 0, "number of mallocs")
+	total    = flag.Int("total", 0, "total number of bytes allocated")
+	allocs   = flag.Int("allocs", 0, "number of bytes allocated")
+	refrate  = flag.Duration("refresh", 0, "refresh rate of the memory stats")
+	delayRes = flag.Duration("delay-response", 0, "delay the response by a random duration between 0 and this value")
+	output   = flag.String("output", "v", "type of output, one of `v`erbose, `q`uiet, `ok`-only, `ko`-only")
+)
+
+func main() {
+	flag.Parse()
+
+	var h http.Handler
+	var ok, ko int
+	var mu sync.Mutex
+
+	// Keep the start time to print since-time
+	start := time.Now()
+	// Create the thresholds struct
+	thresh := throttled.MemThresholds(&runtime.MemStats{
+		NumGC:      uint32(*numgc),
+		Mallocs:    uint64(*mallocs),
+		TotalAlloc: uint64(*total),
+		Alloc:      uint64(*allocs),
+	})
+	if *output != "q" {
+		log.Printf("thresholds: NumGC: %d, Mallocs: %d, Alloc: %dKb, Total: %dKb", thresh.NumGC, thresh.Mallocs, thresh.Alloc/1024, thresh.TotalAlloc/1024)
+	}
+	// Create the MemStats throttler
+	t := throttled.MemStats(thresh, *refrate)
+	// Set its denied handler
+	t.DeniedHandler = http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		if *output == "v" || *output == "ko" {
+			log.Printf("KO: %s", time.Since(start))
+		}
+		throttled.DefaultDeniedHandler.ServeHTTP(w, r)
+		mu.Lock()
+		defer mu.Unlock()
+		ko++
+	})
+
+	// Throttle the OK handler
+	rand.Seed(time.Now().Unix())
+	h = t.Throttle(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		if *output == "v" || *output == "ok" {
+			log.Printf("ok: %s", time.Since(start))
+		}
+		if *delayRes > 0 {
+			wait := time.Duration(rand.Intn(int(*delayRes)))
+			time.Sleep(wait)
+		}
+		// Read the whole file in memory, to actually use 64Kb (instead of streaming to w)
+		b, err := ioutil.ReadFile("test-file")
+		if err != nil {
+			throttled.Error(w, r, err)
+			return
+		}
+		_, err = w.Write(b)
+		if err != nil {
+			throttled.Error(w, r, err)
+		}
+		mu.Lock()
+		defer mu.Unlock()
+		ok++
+	}))
+
+	// Print stats once in a while
+	go func() {
+		var mem runtime.MemStats
+		for _ = range time.Tick(10 * time.Second) {
+			mu.Lock()
+			runtime.ReadMemStats(&mem)
+			log.Printf("ok: %d, ko: %d", ok, ko)
+			log.Printf("TotalAllocs: %d Kb, Allocs: %d Kb, Mallocs: %d, NumGC: %d", mem.TotalAlloc/1024, mem.Alloc/1024, mem.Mallocs, mem.NumGC)
+			mu.Unlock()
+		}
+	}()
+	fmt.Println("server listening on port 9000")
+	http.ListenAndServe(":9000", h)
+}