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queue_sender.go
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queue_sender.go
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package metrics
import (
"bytes"
"encoding/json"
"errors"
"fmt"
"io"
"net/http"
"sync"
"time"
"github.com/lavanet/lava/utils"
)
type QueueSender struct {
name string
endpointAddress string
addQueue []fmt.Stringer
ticker *time.Ticker
lock sync.RWMutex
sendID int
isSendQueueRunning bool
aggregationFunction func([]fmt.Stringer) []fmt.Stringer
}
func NewQueueSender(endpointAddress string, name string, aggregationFunction func([]fmt.Stringer) []fmt.Stringer, interval ...time.Duration) *QueueSender {
if endpointAddress == "" {
return nil
}
tickerTime := 30 * time.Second
if len(interval) > 0 {
tickerTime = interval[0]
}
cuc := &QueueSender{
name: name,
endpointAddress: endpointAddress,
ticker: time.NewTicker(tickerTime),
addQueue: make([]fmt.Stringer, 0),
aggregationFunction: aggregationFunction,
}
go cuc.sendQueueStart()
return cuc
}
func (cuc *QueueSender) sendQueueStart() {
if cuc == nil {
return
}
utils.LavaFormatDebug(fmt.Sprintf("[QueueSender:%s] Starting sendQueueStart loop", cuc.name))
for range cuc.ticker.C {
cuc.sendQueueTick()
}
}
func (crc *QueueSender) sendQueueTick() {
if crc == nil {
return
}
crc.lock.Lock()
defer crc.lock.Unlock()
if !crc.isSendQueueRunning && len(crc.addQueue) > 0 {
sendQueue := crc.addQueue
crc.addQueue = make([]fmt.Stringer, 0)
crc.isSendQueueRunning = true
crc.sendID++
utils.LavaFormatDebug(fmt.Sprintf("[QueueSender:%s] Swapped queues", crc.name), utils.LogAttr("sendQueue_length", len((sendQueue))), utils.LogAttr("send_id", crc.sendID))
sendID := crc.sendID
cucEndpointAddress := crc.endpointAddress
go func() {
crc.sendData(sendQueue, sendID, cucEndpointAddress)
crc.lock.Lock()
crc.isSendQueueRunning = false
crc.lock.Unlock()
}()
} else {
utils.LavaFormatDebug(fmt.Sprintf("[QueueSender:%s] server is busy skipping send", crc.name), utils.LogAttr("id", crc.sendID))
}
}
func (cuc *QueueSender) appendQueue(request fmt.Stringer) {
if cuc == nil {
return
}
cuc.lock.Lock()
defer cuc.lock.Unlock()
cuc.addQueue = append(cuc.addQueue, request)
}
func (crc *QueueSender) send(sendQueue []fmt.Stringer, sendID int, endpointAddress string) (*http.Response, error) {
if crc == nil {
return nil, utils.LavaFormatError("QueueSender is nil. misuse detected", nil)
}
if len(sendQueue) == 0 {
return nil, errors.New("sendQueue is empty")
}
client := &http.Client{
Timeout: 10 * time.Second,
}
jsonData, err := json.Marshal(sendQueue)
if err != nil {
return nil, utils.LavaFormatError("Failed marshaling aggregated requests", err)
}
var resp *http.Response
for i := 0; i < 3; i++ {
resp, err = client.Post(endpointAddress, "application/json", bytes.NewBuffer(jsonData))
if err != nil {
utils.LavaFormatDebug(fmt.Sprintf("[QueueSender:%s] Failed to post request", crc.name), utils.LogAttr("Attempt", i+1), utils.LogAttr("err", err))
time.Sleep(2 * time.Second)
} else {
return resp, nil
}
}
return nil, utils.LavaFormatWarning(fmt.Sprintf("[QueueSender:%s] Failed to send requests after 3 attempts", crc.name), err)
}
func (crc *QueueSender) handleSendResponse(resp *http.Response, sendID int) {
if crc == nil {
return
}
defer resp.Body.Close()
if resp.StatusCode != http.StatusOK {
bodyBytes, err := io.ReadAll(resp.Body)
if err != nil {
utils.LavaFormatWarning(fmt.Sprintf("[QueueSender:%s] failed reading response body", crc.name), err)
} else {
utils.LavaFormatWarning(fmt.Sprintf("[QueueSender:%s] Received non-200 status code", crc.name), nil, utils.LogAttr("status_code", resp.StatusCode), utils.LogAttr("body", string(bodyBytes)))
}
}
}
func (cuc *QueueSender) sendData(sendQueue []fmt.Stringer, sendID int, cucEndpointAddress string) {
if cuc == nil {
return
}
if cuc.aggregationFunction != nil {
sendQueue = cuc.aggregationFunction(sendQueue)
}
resp, err := cuc.send(sendQueue, sendID, cucEndpointAddress)
if err != nil {
utils.LavaFormatWarning("[QueueSender] failed sendRelay data", err)
return
}
cuc.handleSendResponse(resp, sendID)
}