add a test service to measure reqs/s and total visits to a bucket

tests/gossip/test_service.go

@@ -0,0 +1,78 @@
+/*
+   Copyright 2018 Banco Bilbao Vizcaya Argentaria, S.A.
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+       http://www.apache.org/licenses/LICENSE-2.0
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
+*/
+
+package main
+
+import (
+	"fmt"
+	"log"
+	"net/http"
+	"strconv"
+	"sync"
+	"sync/atomic"
+	"time"
+)
+
+type stats struct {
+	sync.Mutex
+	batch []int
+}
+
+func (s *stats) Add(i, v int) {
+	s.Lock()
+	defer s.Unlock()
+	s.batch[i] = s.batch[i] + v
+}
+
+func (s stats) Get(i int) int {
+	s.Lock()
+	defer s.Unlock()
+	return s.batch[i]
+}
+
+var count uint64
+var s stats
+
+func handler(w http.ResponseWriter, r *http.Request) {
+	key := r.URL.Path[1:]
+	i, _ := strconv.Atoi(key)
+
+	s.Add(i, 1)
+
+	atomic.AddUint64(&count, 1)
+}
+
+func main() {
+
+	s.batch = make([]int, 10000)
+
+	go func() {
+		ticker := time.NewTicker(2 * time.Second)
+		for {
+			select {
+			case <-ticker.C:
+				c := atomic.LoadUint64(&count)
+				fmt.Println("Reuqest per second: ", c/2)
+				for i := 0; i < len(s.batch); i++ {
+					if s.batch[i] == 0 {
+						break
+					}
+					fmt.Println("Batch ", i, " visited ", s.Get(i))
+				}
+				atomic.StoreUint64(&count, 0)
+			}
+		}
+	}()
+	http.HandleFunc("/", handler)
+	log.Fatal(http.ListenAndServe(":8080", nil))
+}