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https://github.com/cgrates/cgrates.git
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107 lines
2.6 KiB
Go
107 lines
2.6 KiB
Go
/*
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Real-time Online/Offline Charging System (OCS) for Telecom & ISP environments
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Copyright (C) ITsysCOM GmbH
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>
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*/
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package engine
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import (
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"context"
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"net/url"
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"strings"
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"sync"
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"github.com/cgrates/cgrates/utils"
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kafka "github.com/segmentio/kafka-go"
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)
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// NewKafkaPoster creates a kafka poster
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func NewKafkaPoster(dialURL string, attempts int) (*KafkaPoster, error) {
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kfkPstr := &KafkaPoster{
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attempts: attempts,
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}
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if err := kfkPstr.parseURL(dialURL); err != nil {
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return nil, err
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}
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return kfkPstr, nil
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}
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// KafkaPoster is a kafka poster
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type KafkaPoster struct {
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dialURL string
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topic string // identifier of the CDR queue where we publish
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attempts int
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sync.Mutex // protect writer
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writer *kafka.Writer
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}
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func (pstr *KafkaPoster) parseURL(dialURL string) error {
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pstr.topic = defaultQueueID
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i := strings.IndexByte(dialURL, '?')
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if i < 0 {
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pstr.dialURL = dialURL
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return nil
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}
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pstr.dialURL = dialURL[:i]
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rawQuery := dialURL[i+1:]
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qry, err := url.ParseQuery(rawQuery)
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if err != nil {
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return err
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}
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pstr.dialURL = strings.Split(dialURL, "?")[0]
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if vals, has := qry[utils.KafkaTopic]; has && len(vals) != 0 {
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pstr.topic = vals[0]
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}
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return nil
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}
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// Post is the method being called when we need to post anything in the queue
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// the optional chn will permits channel caching
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func (pstr *KafkaPoster) Post(content []byte, key string) (err error) {
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pstr.newPostWriter()
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pstr.Lock()
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if err = pstr.writer.WriteMessages(context.Background(), kafka.Message{
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Key: []byte(key),
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Value: content,
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}); err == nil {
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pstr.Unlock()
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return
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}
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pstr.Unlock()
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return
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}
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// Close closes the kafka writer
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func (pstr *KafkaPoster) Close() {
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pstr.Lock()
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if pstr.writer != nil {
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pstr.writer.Close()
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}
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pstr.writer = nil
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pstr.Unlock()
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}
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func (pstr *KafkaPoster) newPostWriter() {
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pstr.Lock()
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if pstr.writer == nil {
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pstr.writer = kafka.NewWriter(kafka.WriterConfig{
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Brokers: []string{pstr.dialURL},
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MaxAttempts: pstr.attempts,
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Topic: pstr.topic,
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})
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}
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pstr.Unlock()
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}
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