/
pstr_sqs.go
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/
pstr_sqs.go
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/*
Real-time Online/Offline Charging System (OCS) for Telecom & ISP environments
Copyright (C) ITsysCOM GmbH
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>
*/
package engine
import (
"fmt"
"strings"
"sync"
"time"
"github.com/aws/aws-sdk-go/aws"
"github.com/aws/aws-sdk-go/aws/awserr"
"github.com/aws/aws-sdk-go/aws/credentials"
"github.com/aws/aws-sdk-go/aws/session"
"github.com/aws/aws-sdk-go/service/sqs"
"github.com/cgrates/cgrates/utils"
)
// NewSQSPoster creates a poster for sqs
func NewSQSPoster(dialURL string, attempts int) (Poster, error) {
pstr := &SQSPoster{
attempts: attempts,
}
pstr.parseURL(dialURL)
return pstr, nil
}
// SQSPoster is a poster for sqs
type SQSPoster struct {
sync.Mutex
dialURL string
awsRegion string
awsID string
awsKey string
awsToken string
attempts int
queueURL *string
queueID string
// getQueueOnce sync.Once
session *session.Session
}
// Close for Poster interface
func (pstr *SQSPoster) Close() {}
func (pstr *SQSPoster) parseURL(dialURL string) {
qry := utils.GetUrlRawArguments(dialURL)
pstr.dialURL = strings.Split(dialURL, "?")[0]
pstr.dialURL = strings.TrimSuffix(pstr.dialURL, "/") // used to remove / to point to correct endpoint
pstr.queueID = defaultQueueID
if val, has := qry[queueID]; has {
pstr.queueID = val
}
if val, has := qry[utils.AWSRegion]; has {
pstr.awsRegion = val
}
if val, has := qry[utils.AWSKey]; has {
pstr.awsID = val
}
if val, has := qry[utils.AWSSecret]; has {
pstr.awsKey = val
}
if val, has := qry[awsToken]; has {
pstr.awsToken = val
}
pstr.getQueueURL()
}
func (pstr *SQSPoster) getQueueURL() (err error) {
if pstr.queueURL != nil {
return nil
}
// pstr.getQueueOnce.Do(func() {
var svc *sqs.SQS
if svc, err = pstr.newPosterSession(); err != nil {
return
}
var result *sqs.GetQueueUrlOutput
if result, err = svc.GetQueueUrl(&sqs.GetQueueUrlInput{
QueueName: aws.String(pstr.queueID),
}); err == nil {
pstr.queueURL = new(string)
*(pstr.queueURL) = *result.QueueUrl
return
}
if aerr, ok := err.(awserr.Error); ok && aerr.Code() == sqs.ErrCodeQueueDoesNotExist {
// For CreateQueue
var createResult *sqs.CreateQueueOutput
if createResult, err = svc.CreateQueue(&sqs.CreateQueueInput{
QueueName: aws.String(pstr.queueID),
}); err == nil {
pstr.queueURL = new(string)
*(pstr.queueURL) = *createResult.QueueUrl
return
}
}
utils.Logger.Warning(fmt.Sprintf("<SQSPoster> can not get url for queue with ID=%s because err: %v", pstr.queueID, err))
// })
return err
}
// Post is the method being called when we need to post anything in the queue
func (pstr *SQSPoster) Post(message []byte, _ string) (err error) {
var svc *sqs.SQS
fib := utils.Fib()
for i := 0; i < pstr.attempts; i++ {
if svc, err = pstr.newPosterSession(); err == nil {
break
}
if i+1 < pstr.attempts {
time.Sleep(time.Duration(fib()) * time.Second)
}
}
if err != nil {
utils.Logger.Warning(fmt.Sprintf("<SQSPoster> creating new session, err: %s", err.Error()))
return
}
for i := 0; i < pstr.attempts; i++ {
if _, err = svc.SendMessage(
&sqs.SendMessageInput{
MessageBody: aws.String(string(message)),
QueueUrl: pstr.queueURL,
},
); err == nil {
break
}
if i+1 < pstr.attempts {
time.Sleep(time.Duration(fib()) * time.Second)
}
}
if err != nil {
utils.Logger.Warning(fmt.Sprintf("<SQSPoster> posting new message, err: %s", err.Error()))
}
return
}
func (pstr *SQSPoster) newPosterSession() (s *sqs.SQS, err error) {
pstr.Lock()
defer pstr.Unlock()
if pstr.session == nil {
var ses *session.Session
cfg := aws.Config{Endpoint: aws.String(pstr.dialURL)}
if len(pstr.awsRegion) != 0 {
cfg.Region = aws.String(pstr.awsRegion)
}
if len(pstr.awsID) != 0 &&
len(pstr.awsKey) != 0 {
cfg.Credentials = credentials.NewStaticCredentials(pstr.awsID, pstr.awsKey, pstr.awsToken)
}
ses, err = session.NewSessionWithOptions(
session.Options{
Config: cfg,
},
)
if err != nil {
return nil, err
}
pstr.session = ses
}
return sqs.New(pstr.session), nil
}