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Chapter 49. Kafka Sink

Send data to Kafka topics through Plain Login Module.

The Kamelet is able to understand the following headers to be set:

  • key / ce-key: as message key
  • partition-key / ce-partitionkey: as message partition key

Both the headers are optional.

49.1. Configuration Options
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The following table summarizes the configuration options available for the kafka-sink Kamelet:

Expand
PropertyNameDescriptionTypeDefaultExample

bootstrapServers *

Bootstrap Servers

Comma separated list of Kafka Broker URLs

string

  

password *

Password

Password to authenticate to kafka

string

  

topic *

Topic Names

Comma separated list of Kafka topic names

string

  

user *

Username

Username to authenticate to Kafka

string

  

saslMechanism

SASL Mechanism

The Simple Authentication and Security Layer (SASL) Mechanism used.

string

PLAIN

 

securityProtocol

Security Protocol

Protocol used to communicate with brokers. SASL_PLAINTEXT, PLAINTEXT, SASL_SSL and SSL are supported

string

SASL_SSL

 

* = Fields marked with an asterisk are mandatory.

49.2. Dependencies
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49.2.1. Quarkus dependencies
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<dependencies>
  <dependency>
    <groupId>org.apache.camel.quarkus</groupId>
    <artifact>camel-quarkus-core</artifact>
  </dependency>
  <dependency>
    <groupId>org.apache.camel.quarkus</groupId>
    <artifact>camel-quarkus-kafka</artifact>
  </dependency>
  <dependency>
    <groupId>org.apache.camel.quarkus</groupId>
    <artifact>camel-quarkus-kamelet</artifact>
  </dependency>
  <dependency>
    <groupId>org.apache.camel.kamelets</groupId>
    <artifact>camel-kamelets-utils</artifact>
    <version>4.8.5</version>
  </dependency>
</dependencies>
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49.3. Usage
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49.3.1. Camel JBang usage
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49.3.1.1. Prerequisites for JBang
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  • Install JBang.

  • You have executed the following command: 

    jbang app install camel@apache/camel
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49.3.1.2. Running a route with JBang
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Suppose you have a file named route.yaml with this content: 

- route:
    from:
      uri: "kamelet:timer-source"
      parameters:
        period: 10000
        message: 'test'
      steps:
        - to:
            uri: "kamelet:log-sink"
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You can now run it directly through the following command. 

camel run route.yaml
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49.3.2. Knative Sink
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You can use the kafka-sink Kamelet as a Knative sink by binding it to a Knative object.

kafka-sink-binding.yaml

apiVersion: camel.apache.org/v1
kind: Pipe
metadata:
  name: kafka-sink-binding
spec:
  source:
    ref:
      kind: Channel
      apiVersion: messaging.knative.dev/v1
      name: mychannel
  sink:
    ref:
      kind: Kamelet
      apiVersion: camel.apache.org/v1
      name: kafka-sink
    properties:
      bootstrapServers: "The Brokers"
      password: "The Password"
      topic: "The Topic Names"
      user: "The Username"
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49.3.3. Kafka Sink
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You can use the kafka-sink Kamelet as a Kafka sink by binding it to a Kafka topic.

kafka-sink-binding.yaml

apiVersion: camel.apache.org/v1
kind: Pipe
metadata:
  name: kafka-sink-binding
spec:
  source:
    ref:
      kind: KafkaTopic
      apiVersion: kafka.strimzi.io/v1beta1
      name: my-topic
  sink:
    ref:
      kind: Kamelet
      apiVersion: camel.apache.org/v1
      name: kafka-sink
    properties:
      bootstrapServers: "The Brokers"
      password: "The Password"
      topic: "The Topic Names"
      user: "The Username"
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49.4. Kamelets source file
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https://github.com/jboss-fuse/camel-kamelets/blob/camel-kamelets-4.10.3-branch/kamelets/kafka-sink.kamelet.yaml

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