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publisher.go
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publisher.go
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/**
* Copyright (c) 2015 Intel Corporation
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package main
import (
"github.com/Shopify/sarama"
"log"
"time"
)
var (
qProducer sarama.AsyncProducer
)
func queueInit() {
config := sarama.NewConfig()
config.ClientID = args.ID
// Acks
if args.Pub.Ack {
config.Producer.RequiredAcks = sarama.WaitForAll
} else {
config.Producer.RequiredAcks = sarama.WaitForLocal
}
// Compress
if args.Pub.Compress {
config.Producer.Compression = sarama.CompressionSnappy
} else {
config.Producer.Compression = sarama.CompressionNone
}
// Flush Intervals
if args.Pub.FlushFreq > 0 {
config.Producer.Flush.Frequency = time.Duration(args.Pub.FlushFreq) * time.Second
} else {
config.Producer.Flush.Frequency = 1 * time.Second
}
producer, err := sarama.NewAsyncProducer(args.Pub.URI, config)
if err != nil {
log.Fatalln("Failed to start Kafka producer:", err)
}
qProducer = producer
}
// Start fires a publisher listener
func produce(in <-chan *Message) {
for {
msg := <-in
select {
case qProducer.Input() <- &sarama.ProducerMessage{
Topic: args.Pub.Topic,
Key: nil,
Value: sarama.StringEncoder(msg.ToBytes()),
}:
if args.Trace {
log.Printf("Queue[%s] < %s", args.Pub.Topic, msg)
}
case err := <-qProducer.Errors():
log.Printf("Error on queue send for [%s]: %v", args.Pub.Topic, err.Err)
}
}
}