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|
package sfive
import (
"bytes"
"encoding/json"
"fmt"
"io/ioutil"
"net/http"
"strconv"
"strings"
"time"
)
const lastUpdateJson = `{
"query": {"match": { "SourceHubUuid": "%s" } },
"aggregations": { "last-id" : { "max" : { "field": "SourceHubDataUpdateId" } } }
}`
func (self StatsSinkServer) getLastUpdateEs(baseurl string, client *http.Client) (latestId int, storeId string, err error) {
url := baseurl + "/dataupdate/_search?pretty"
storeId, err = self.getHubIdInvoke()
if err != nil {
s5l.Printf("fwd-es: failed to get own hubid: %v\n", err)
return
}
queryJson := fmt.Sprintf(lastUpdateJson, storeId)
s5tl.Printf("fwd-es: query: %s", queryJson)
resp, err := client.Post(url, "application/json", strings.NewReader(queryJson))
if err != nil {
s5l.Printf("fwd-es: failed to query for lastupdate: %v\n", err)
return
}
defer resp.Body.Close()
if resp.StatusCode != http.StatusOK {
s5l.Printf("fwd-es: server failed to fulfill query for lastupdate: %v\n", resp.StatusCode)
return
}
body, err := ioutil.ReadAll(resp.Body)
if err != nil {
s5l.Printf("fwd-es: failed to read lastupdate response: %v\n", err)
return
}
s5tl.Printf("fwd-es: lastupdate response: %s\n", body)
if len(body) == 0 {
latestId = -1
} else {
var value interface{}
errl := json.Unmarshal(body, &value)
if errl != nil {
s5l.Printf("fwd-es: invalid lastupdate response: %v\n", errl)
err = errl
return
}
idstrcntr := value.(map[string]interface{})["aggregations"].(map[string]interface{})["last-id"].(map[string]interface{})["value"]
if idstrcntr == nil {
s5l.Printf("fwd-es: we are new here\n")
latestId = -1
return
}
idstr := idstrcntr.(*string)
tid, errl := strconv.ParseInt(*idstr, 10, 32)
if errl != nil {
s5l.Printf("fwd-es: invalid value: %v\n", errl)
err = errl
return
}
latestId = int(tid)
}
return
}
type esUpdate struct {
Data StatisticsData `json:"update"`
}
func (self StatsSinkServer) handleForwardingToElasticSearch(baseurl string, client *http.Client) {
url := baseurl + "/dataupdate/_bulk"
tryResync:
for {
lastId, _, err := self.getLastUpdateEs(baseurl, client)
if err != nil {
s5l.Printf("fwd-es: lastupdate returned err: %v", err)
time.Sleep(5 * time.Second)
continue tryResync
}
s5l.Printf("fwd-es: lastupdate: %d", lastId)
nextBatch:
for {
updates, err := self.getUpdatesAfterInvoke(lastId)
if err != nil {
s5l.Printf("fwd-es: failed reading updates: %v\n", err)
time.Sleep(500 * time.Millisecond)
continue nextBatch
}
s5l.Printf("fwd-es: got %d updates", len(updates))
if len(updates) == 0 {
time.Sleep(1 * time.Second)
continue nextBatch
}
postData := make([]byte, 4096)
for _, update := range updates {
data, err := json.Marshal(esUpdate{Data: update})
if err != nil {
s5l.Panicf("fwd-es: encode failed: %v\n", err)
}
postData = append(postData, ([]byte)("\n")...)
postData = append(postData, data...)
}
s5tl.Printf("fwd-es: marshalled: %v", (string)(postData))
s5l.Printf("fwd-es: marshal OK")
resp, err := client.Post(url, "text/plain", bytes.NewBuffer(postData))
if err != nil {
s5l.Printf("fwd-es: post failed: %v\n", err)
time.Sleep(1 * time.Second)
continue tryResync
}
resp.Body.Close()
if resp.StatusCode != http.StatusOK && resp.StatusCode != http.StatusCreated {
s5l.Printf("fwd-es: post failed: %s\n", resp.Status)
time.Sleep(1 * time.Second)
continue tryResync
}
s5l.Printf("fwd-es: all posts OK")
lastId = findMaxId(updates)
s5l.Printf("fwd-es: new lastid: %d", lastId)
time.Sleep(1 * time.Second)
}
}
}
func (self StatsSinkServer) RunForwardingToElasticSearch(forwardBaseUrl string) {
self.handleForwardingToElasticSearch(forwardBaseUrl, http.DefaultClient)
}
|
