func Start(httpAddr string, rep *representative.Representative) {
http.HandleFunc("/total_resources", func(w http.ResponseWriter, r *http.Request) {
json.NewEncoder(w).Encode(rep.TotalResources())
})
http.HandleFunc("/instances", func(w http.ResponseWriter, r *http.Request) {
json.NewEncoder(w).Encode(rep.Instances())
})
http.HandleFunc("/reset", func(w http.ResponseWriter, r *http.Request) {
rep.Reset()
})
http.HandleFunc("/set_instances", func(w http.ResponseWriter, r *http.Request) {
var instances []instance.Instance
err := json.NewDecoder(r.Body).Decode(&instances)
if err != nil {
w.WriteHeader(http.StatusBadRequest)
return
}
rep.SetInstances(instances)
})
http.HandleFunc("/vote", func(w http.ResponseWriter, r *http.Request) {
var inst instance.Instance
err := json.NewDecoder(r.Body).Decode(&inst)
if err != nil {
w.WriteHeader(http.StatusBadRequest)
return
}
score, err := rep.Vote(inst)
if err != nil {
w.WriteHeader(http.StatusServiceUnavailable)
return
}
json.NewEncoder(w).Encode(score)
})
http.HandleFunc("/reserve_and_recast_vote", func(w http.ResponseWriter, r *http.Request) {
var inst instance.Instance
err := json.NewDecoder(r.Body).Decode(&inst)
if err != nil {
w.WriteHeader(http.StatusBadRequest)
return
}
score, err := rep.ReserveAndRecastVote(inst)
if err != nil {
w.WriteHeader(http.StatusServiceUnavailable)
return
}
json.NewEncoder(w).Encode(score)
})
http.HandleFunc("/release", func(w http.ResponseWriter, r *http.Request) {
var inst instance.Instance
err := json.NewDecoder(r.Body).Decode(&inst)
if err != nil {
w.WriteHeader(http.StatusBadRequest)
return
}
rep.Release(inst)
w.WriteHeader(http.StatusOK)
})
http.HandleFunc("/claim", func(w http.ResponseWriter, r *http.Request) {
var inst instance.Instance
err := json.NewDecoder(r.Body).Decode(&inst)
if err != nil {
w.WriteHeader(http.StatusBadRequest)
return
}
rep.Claim(inst)
w.WriteHeader(http.StatusOK)
})
fmt.Printf("[%s] serving http on %s\n", rep.Guid(), httpAddr)
panic(http.ListenAndServe(httpAddr, nil))
}
func Start(natsAddrs []string, rep *representative.Representative) {
client := yagnats.NewClient()
clusterInfo := &yagnats.ConnectionCluster{}
for _, addr := range natsAddrs {
clusterInfo.Members = append(clusterInfo.Members, &yagnats.ConnectionInfo{
Addr: addr,
})
}
err := client.Connect(clusterInfo)
if err != nil {
log.Fatalln("no nats:", err)
}
guid := rep.Guid()
client.Subscribe(guid+".guid", func(msg *yagnats.Message) {
jguid, _ := json.Marshal(rep.Guid())
client.Publish(msg.ReplyTo, jguid)
})
client.Subscribe(guid+".total_resources", func(msg *yagnats.Message) {
jresources, _ := json.Marshal(rep.TotalResources())
client.Publish(msg.ReplyTo, jresources)
})
client.Subscribe(guid+".reset", func(msg *yagnats.Message) {
rep.Reset()
client.Publish(msg.ReplyTo, successResponse)
})
client.Subscribe(guid+".set_instances", func(msg *yagnats.Message) {
var instances []instance.Instance
err := json.Unmarshal(msg.Payload, &instances)
if err != nil {
client.Publish(msg.ReplyTo, errorResponse)
}
rep.SetInstances(instances)
client.Publish(msg.ReplyTo, successResponse)
})
client.Subscribe(guid+".instances", func(msg *yagnats.Message) {
jinstances, _ := json.Marshal(rep.Instances())
client.Publish(msg.ReplyTo, jinstances)
})
client.Subscribe(guid+".vote", func(msg *yagnats.Message) {
var inst instance.Instance
err := json.Unmarshal(msg.Payload, &inst)
if err != nil {
panic(err)
}
response := types.VoteResult{
Rep: guid,
}
defer func() {
payload, _ := json.Marshal(response)
client.Publish(msg.ReplyTo, payload)
}()
score, err := rep.Vote(inst)
if err != nil {
// log.Println(guid, "failed to vote:", err)
response.Error = err.Error()
return
}
response.Score = score
})
client.Subscribe(guid+".reserve_and_recast_vote", func(msg *yagnats.Message) {
var inst instance.Instance
responsePayload := errorResponse
defer func() {
client.Publish(msg.ReplyTo, responsePayload)
}()
err := json.Unmarshal(msg.Payload, &inst)
if err != nil {
// log.Println(guid, "invalid reserve_and_recast_vote request:", err)
return
}
score, err := rep.ReserveAndRecastVote(inst)
if err != nil {
// log.Println(guid, "failed to reserve_and_recast_vote:", err)
return
}
responsePayload, _ = json.Marshal(score)
})
client.Subscribe(guid+".release", func(msg *yagnats.Message) {
var inst instance.Instance
responsePayload := errorResponse
defer func() {
client.Publish(msg.ReplyTo, responsePayload)
}()
err := json.Unmarshal(msg.Payload, &inst)
if err != nil {
log.Println(guid, "invalid reserve_and_recast_vote request:", err)
return
}
rep.Release(inst)
responsePayload = successResponse
})
client.Subscribe(guid+".claim", func(msg *yagnats.Message) {
var inst instance.Instance
responsePayload := errorResponse
defer func() {
client.Publish(msg.ReplyTo, responsePayload)
}()
err := json.Unmarshal(msg.Payload, &inst)
if err != nil {
log.Println(guid, "invalid reserve_and_recast_vote request:", err)
return
}
rep.Claim(inst)
responsePayload = successResponse
})
fmt.Printf("[%s] listening for nats\n", guid)
select {}
}