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kafka-playground's Introduction

kafka-playground

Dette prosjektet viser bruk av Avro serialiseringsformat, og Confluent Schema Registry.

For lokal Kafka-broker, kjør docker-compose up.

Man kan starte en konsument i kafka-connect-containeren:

# På Docker host
docker exec -it kafka-connect bash

# Inne i kafka-connect container:
kafka-avro-console-consumer --bootstrap-server broker:29092 \
  --property schema.registry.url="http://schema-registry:8081" \
  --property print.key=true \
  --property key.deserializer=org.apache.kafka.common.serialization.StringDeserializer \
  --skip-message-on-error \
  --topic <topic>

# Hvis man ønsker å produsere meldinger for test
kafka-avro-console-producer --bootstrap-server broker:29092 \
  --property schema.registry.url="http://schema-registry:8081" \
  --property value.schema.id=1 \
  --topic <topic>

For å produsere meldinger (se kommando over), kan man angi meldinger i JSON-format, og avslutte med linjeskift.

Schema ID kan variere. Du kan liste skjema i ditt schema registry med curl http://localhost:9081/schemas, eventuelt fra inne i containeren curl http://schema-registry:8081/schemas. Finn id på skjema-innslaget du ønsker å bruke. Dette må gjøres etter at applikasjonen har publisert en melding, og dermed registrert skjemaet.

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