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114 lines
2.7 KiB
114 lines
2.7 KiB
/*
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* Minio Cloud Storage, (C) 2018 Minio, Inc.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package target
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import (
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"encoding/json"
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"errors"
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"net/url"
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"github.com/minio/minio/pkg/event"
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xnet "github.com/minio/minio/pkg/net"
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sarama "gopkg.in/Shopify/sarama.v1"
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)
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// KafkaArgs - Kafka target arguments.
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type KafkaArgs struct {
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Enable bool `json:"enable"`
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Brokers []xnet.Host `json:"brokers"`
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Topic string `json:"topic"`
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}
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// Validate KafkaArgs fields
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func (k KafkaArgs) Validate() error {
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if !k.Enable {
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return nil
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}
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if len(k.Brokers) == 0 {
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return errors.New("no broker address found")
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}
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for _, b := range k.Brokers {
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if _, err := xnet.ParseHost(b.String()); err != nil {
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return err
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}
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}
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return nil
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}
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// KafkaTarget - Kafka target.
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type KafkaTarget struct {
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id event.TargetID
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args KafkaArgs
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producer sarama.SyncProducer
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}
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// ID - returns target ID.
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func (target *KafkaTarget) ID() event.TargetID {
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return target.id
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}
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// Send - sends event to Kafka.
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func (target *KafkaTarget) Send(eventData event.Event) error {
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objectName, err := url.QueryUnescape(eventData.S3.Object.Key)
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if err != nil {
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return err
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}
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key := eventData.S3.Bucket.Name + "/" + objectName
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data, err := json.Marshal(event.Log{eventData.EventName, key, []event.Event{eventData}})
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if err != nil {
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return err
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}
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msg := sarama.ProducerMessage{
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Topic: target.args.Topic,
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Key: sarama.StringEncoder(key),
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Value: sarama.ByteEncoder(data),
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}
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_, _, err = target.producer.SendMessage(&msg)
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return err
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}
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// Close - closes underneath kafka connection.
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func (target *KafkaTarget) Close() error {
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return target.producer.Close()
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}
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// NewKafkaTarget - creates new Kafka target.
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func NewKafkaTarget(id string, args KafkaArgs) (*KafkaTarget, error) {
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config := sarama.NewConfig()
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config.Producer.RequiredAcks = sarama.WaitForAll
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config.Producer.Retry.Max = 10
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config.Producer.Return.Successes = true
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brokers := []string{}
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for _, broker := range args.Brokers {
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brokers = append(brokers, broker.String())
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}
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producer, err := sarama.NewSyncProducer(brokers, config)
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if err != nil {
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return nil, err
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}
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return &KafkaTarget{
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id: event.TargetID{id, "kafka"},
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args: args,
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producer: producer,
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}, nil
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}
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