c72f561abd
As we work towards introducing consumer groups to the repository we need a more generic name for the persistence layer for storing checkpoints and leases for given shards. * Rename `checkpoint` to `store`
74 lines
1.5 KiB
Go
74 lines
1.5 KiB
Go
package main
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import (
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"context"
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"flag"
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"fmt"
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"log"
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"os"
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"os/signal"
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consumer "github.com/harlow/kinesis-consumer"
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checkpoint "github.com/harlow/kinesis-consumer/store/redis"
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)
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// A myLogger provides a minimalistic logger satisfying the Logger interface.
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type myLogger struct {
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logger *log.Logger
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}
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// Log logs the parameters to the stdlib logger. See log.Println.
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func (l *myLogger) Log(args ...interface{}) {
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l.logger.Println(args...)
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}
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func main() {
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var (
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app = flag.String("app", "", "Consumer app name")
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stream = flag.String("stream", "", "Stream name")
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)
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flag.Parse()
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// redis checkpoint
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ck, err := checkpoint.New(*app)
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if err != nil {
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log.Fatalf("checkpoint error: %v", err)
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}
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// logger
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logger := &myLogger{
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logger: log.New(os.Stdout, "consumer-example: ", log.LstdFlags),
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}
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// consumer
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c, err := consumer.New(
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*stream,
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consumer.WithStorage(ck),
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consumer.WithLogger(logger),
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)
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if err != nil {
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log.Fatalf("consumer error: %v", err)
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}
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// use cancel func to signal shutdown
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ctx, cancel := context.WithCancel(context.Background())
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// trap SIGINT, wait to trigger shutdown
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signals := make(chan os.Signal, 1)
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signal.Notify(signals, os.Interrupt)
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go func() {
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<-signals
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fmt.Println("caught exit signal, cancelling context!")
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cancel()
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}()
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// scan stream
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err = c.Scan(ctx, func(r *consumer.Record) error {
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fmt.Println(string(r.Data))
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return nil // continue scanning
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})
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if err != nil {
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log.Fatalf("scan error: %v", err)
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}
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}
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