/
sqs.go
130 lines (101 loc) · 2.8 KB
/
sqs.go
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package rsqs
import (
"context"
"log"
"sync/atomic"
"time"
"github.com/aws/aws-sdk-go/aws"
"github.com/aws/aws-sdk-go/aws/session"
"github.com/aws/aws-sdk-go/service/sqs"
"github.com/gallir/smart-relayer/lib"
)
func (srv *Server) failure() {
srv.Lock()
defer srv.Unlock()
if srv.reseting || srv.exiting {
return
}
if time.Now().Sub(srv.lastError) > errorsFrame {
srv.errors = 0
}
srv.errors++
srv.lastError = time.Now()
log.Printf("SQS: %d errors detected", srv.errors)
if srv.errors > maxErrors {
go srv.retry()
}
}
func (srv *Server) retry() {
srv.Lock()
defer srv.Unlock()
if srv.clientsReset() == nil {
return
}
srv.tries++
log.Printf("SQS ERROR: %d attempts to connect to SQS: %s", srv.tries, srv.config.URL)
if srv.tries >= maxConnectionsTries {
srv.failing = true
time.Sleep(connectionRetry * 2)
} else {
time.Sleep(connectionRetry)
}
go srv.retry()
}
func (srv *Server) clientsReset() (err error) {
if srv.exiting {
return nil
}
srv.reseting = true
defer func() { srv.reseting = false }()
lib.Debugf("SQS Reload config to the stream %s listen %s", srv.config.URL, srv.config.Listen)
var sess *session.Session
if srv.config.Profile != "" {
sess, err = session.NewSessionWithOptions(session.Options{Profile: srv.config.Profile})
} else {
sess, err = session.NewSession()
}
if err != nil {
log.Printf("SQS ERROR: session: %s", err)
srv.errors++
srv.lastError = time.Now()
return err
}
srv.awsSvc = sqs.New(sess, &aws.Config{Region: aws.String(srv.config.Region)})
ctx, cancel := context.WithTimeout(context.Background(), connectTimeout)
defer cancel()
req, _ := srv.awsSvc.GetQueueAttributesRequest(&sqs.GetQueueAttributesInput{
QueueUrl: &srv.config.URL,
})
req.SetContext(ctx)
if err := req.Send(); err != nil {
log.Printf("SQS ERROR: getAttributes: %s: %s", srv.config.URL, err)
return err
}
lib.Debugf("SQS Connected to %s", srv.config.URL)
srv.lastConnection = time.Now()
srv.errors = 0
srv.failing = false
currClients := len(srv.clients)
// No changes in the number of clients
if currClients == srv.config.MaxConnections {
return nil
}
// If the config define lower number than the active clients remove the difference
if currClients > srv.config.MaxConnections {
for i := currClients; i > srv.config.MaxConnections; i-- {
k := i - 1
// Exiting client without block
go srv.clients[k].Exit()
srv.clients[k] = nil
srv.clients = append(srv.clients[:k], srv.clients[k+1:]...)
}
atomic.StoreInt64(&clientCount, int64(len(srv.clients)))
} else {
// If the config define higher number than the active clients start new clients
for i := currClients; i < srv.config.MaxConnections; i++ {
srv.clients = append(srv.clients, NewClient(srv))
}
}
atomic.StoreInt64(&clientCount, int64(len(srv.clients)))
return nil
}