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Chapter 18. Cassandra Sink

Send data to an Apache Cassandra cluster.

This Kamelet expects JSON Array formatted data. The content of the JSON Array is used as input for the CQL Prepared Statement set in the query parameter.

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

Expand
PropertyNameDescriptionTypeDefaultExample

connectionHost *

Connection Host

The hostname(s) for the Cassandra server(s). Use a comma to separate multiple hostnames.

string

 

localhost

connectionPort *

Connection Port

The port number(s) of the cassandra server(s). Use a comma to separate multiple port numbers.

string

 

9042

keyspace *

Keyspace

The keyspace to use.

string

 

customers

query *

Query

The query to execute against the Cassandra cluster table.

string

  

consistencyLevel

Consistency Level

The consistency level to use.

string

ANY

 

extraTypeCodecs

Extra Type Codecs

To use a specific comma separated list of Extra Type codecs.

string

  

jsonPayload

JSON Payload

If we want to transform the payload in json or not

boolean

True

 

password

Password

The password for accessing a secured Cassandra cluster.

string

  

prepareStatements

Prepare Statements

If true, specifies to use PreparedStatements as the query. If false, specifies to use regular Statements as the query.

boolean

True

 

username

Username

The username for accessing a secured Cassandra cluster.

string

  

* = Fields marked with an asterisk are mandatory.

18.2. Dependencies
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18.2.1. Quarkus dependencies
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<dependencies>
  <dependency>
    <groupId>org.apache.camel.kamelets</groupId>
    <artifactId>camel-kamelets-utils</artifactId>
    <version>4.8.5</version>
  </dependency>
  <dependency>
    <groupId>org.apache.camel.quarkus</groupId>
    <artifactId>camel-quarkus-cassandraql-ddb</artifactId>
  </dependency>
  <dependency>
    <groupId>org.apache.camel.quarkus</groupId>
    <artifactId>camel-quarkus-core</artifactId>
  </dependency>
  <dependency>
    <groupId>org.apache.camel.quarkus</groupId>
    <artifactId>camel-quarkus-jackson</artifactId>
  </dependency>
  <dependency>
    <groupId>org.apache.camel.quarkus</groupId>
    <artifactId>camel-quarkus-kamelet</artifactId>
  </dependency>
</dependencies>

18.3. Usage
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18.3.1. Camel JBang usage
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18.3.1.1. Prerequisites for JBang
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  • Install JBang.

  • You have executed the following command: 

    jbang app install camel@apache/camel

18.3.1.2. 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"

You can now run it directly through the following command. 

camel run route.yaml

18.3.2. Knative Sink
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You can use the cassandra-sink Kamelet as a Knative sink by binding it to a Knative object.

cassandra-sink-binding.yaml

apiVersion: camel.apache.org/v1
kind: Pipe
metadata:
  name: cassandra-sink-binding
spec:
  source:
    ref:
      kind: Channel
      apiVersion: messaging.knative.dev/v1
      name: mychannel
  sink:
    ref:
      kind: Kamelet
      apiVersion: camel.apache.org/v1
      name: cassandra-sink
    properties:
      connectionHost: "localhost"
      connectionPort: 9042
      keyspace: "customers"
      password: "The Password"
      query: "The Query"
      username: "The Username"

18.3.3. Kafka Sink
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You can use the cassandra-sink Kamelet as a Kafka sink by binding it to a Kafka topic.

cassandra-sink-binding.yaml

apiVersion: camel.apache.org/v1
kind: Pipe
metadata:
  name: cassandra-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: cassandra-sink
    properties:
      connectionHost: "localhost"
      connectionPort: 9042
      keyspace: "customers"
      password: "The Password"
      query: "The Query"
      username: "The Username"

18.4. Kamelets source file
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https://github.com/jboss-fuse/camel-kamelets/blob/camel-kamelets-4.10.3-branch/kamelets/cassandra-sink.kamelet.yaml

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