71 lines
1.6 KiB
Go
71 lines
1.6 KiB
Go
package cmd
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import (
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"context"
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"os"
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"time"
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"github.com/pkg/errors"
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"github.com/spf13/cobra"
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"github.com/spf13/viper"
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"github.com/ThreeDotsLabs/watermill-io/pkg/io"
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"github.com/ThreeDotsLabs/watermill/message"
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"github.com/ThreeDotsLabs/watermill/message/router/plugin"
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)
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// consumer is initialized by the parent command to the pub/sub provider of choice.
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var consumer message.Subscriber
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func addConsumeCmd(parent *cobra.Command, topicKey string) *cobra.Command {
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cmd := &cobra.Command{
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Use: "consume",
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Short: "Consume messages from a pub/sub and print them to stdout",
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Long: `Consume messages from the pub/sub of your choice and print them on the standard output.
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For the configuration of particular pub/sub providers, see the help for the provider commands.`,
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RunE: func(cmd *cobra.Command, args []string) error {
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topic := viper.GetString(topicKey)
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router, err := message.NewRouter(
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message.RouterConfig{
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CloseTimeout: 5 * time.Second,
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},
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logger,
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)
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if err != nil {
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return errors.Wrap(err, "could not create router")
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}
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router.AddPlugin(plugin.SignalsHandler)
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out, err := io.NewPublisher(
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os.Stdout,
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io.PublisherConfig{
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MarshalFunc: io.PayloadMarshalFunc,
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},
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logger,
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)
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if err != nil {
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return errors.Wrap(err, "could not create console producer")
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}
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router.AddHandler(
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"dump_to_stdout",
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topic,
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consumer,
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"",
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out,
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func(msg *message.Message) ([]*message.Message, error) {
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// just forward the message to stdout
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return message.Messages{msg}, nil
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},
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)
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return router.Run(context.Background())
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},
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}
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parent.AddCommand(cmd)
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return cmd
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}
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