92 lines
2.5 KiB
Go
92 lines
2.5 KiB
Go
// Copyright 2017 Vector Creations Ltd
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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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package main
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import (
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"bufio"
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"flag"
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"fmt"
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"github.com/Shopify/sarama"
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"os"
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"strings"
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)
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const usage = `Usage: %s
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Reads a list of newline separated messages from stdin and writes them to a single partition in kafka.
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Arguments:
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`
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var (
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brokerList = flag.String("brokers", os.Getenv("KAFKA_PEERS"), "The comma separated list of brokers in the Kafka cluster. You can also set the KAFKA_PEERS environment variable")
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topic = flag.String("topic", "", "REQUIRED: the topic to produce to")
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partition = flag.Int("partition", 0, "The partition to produce to. All the messages will be written to this partition.")
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)
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func main() {
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flag.Usage = func() {
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fmt.Fprintf(os.Stderr, usage, os.Args[0])
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flag.PrintDefaults()
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}
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flag.Parse()
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if *brokerList == "" {
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fmt.Fprintln(os.Stderr, "no -brokers specified. Alternatively, set the KAFKA_PEERS environment variable")
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os.Exit(1)
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}
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if *topic == "" {
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fmt.Fprintln(os.Stderr, "no -topic specified")
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os.Exit(1)
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}
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config := sarama.NewConfig()
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config.Producer.RequiredAcks = sarama.WaitForAll
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config.Producer.Return.Successes = true
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config.Producer.Partitioner = sarama.NewManualPartitioner
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producer, err := sarama.NewSyncProducer(strings.Split(*brokerList, ","), config)
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if err != nil {
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fmt.Fprintln(os.Stderr, "Failed to open Kafka producer:", err)
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os.Exit(1)
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}
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defer func() {
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if err := producer.Close(); err != nil {
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fmt.Fprintln(os.Stderr, "Failed to close Kafka producer cleanly:", err)
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}
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}()
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scanner := bufio.NewScanner(os.Stdin)
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for scanner.Scan() {
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line := scanner.Bytes()
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message := &sarama.ProducerMessage{
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Topic: *topic,
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Partition: int32(*partition),
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Value: sarama.ByteEncoder(line),
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}
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if _, _, err := producer.SendMessage(message); err != nil {
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fmt.Fprintln(os.Stderr, "Failed to send message:", err)
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os.Exit(1)
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}
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}
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if err := scanner.Err(); err != nil {
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fmt.Fprintln(os.Stderr, "reading standard input:", err)
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}
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}
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