cassandra source Cassandra Source

Provided by: "Apache Software Foundation"

Support Level for this Kamelet is: "Preview"

Query a Cassandra cluster table.

Configuration Options

The following table summarizes the configuration options available for the cassandra-source Kamelet:

Property Name Description Type Default Example

connectionHost

Connection Host

Required Hostname(s) cassandra server(s). Multiple hosts can be separated by comma.

string

localhost

connectionPort

Connection Port

Required Port number of cassandra server(s).

string

9042

keyspace

Keyspace

Required Keyspace to use.

string

customers

query

Query

Required The query to execute against the Cassandra cluster table.

string

consistencyLevel

Consistency Level

Consistency level to use. The value can be one of ANY, ONE, TWO, THREE, QUORUM, ALL, LOCAL_QUORUM, EACH_QUORUM, SERIAL, LOCAL_SERIAL, LOCAL_ONE.

string

QUORUM

password

Password

The password to use for accessing a secured Cassandra Cluster.

string

resultStrategy

Result Strategy

The strategy to convert the result set of the query. Possible values are ALL, ONE, LIMIT_10, LIMIT_100…​

string

ALL

username

Username

The username to use for accessing a secured Cassandra Cluster.

string

Dependencies

At runtime, the cassandra-source Kamelet relies upon the presence of the following dependencies:

  • camel:jackson

  • camel:kamelet

  • camel:cassandraql

Usage

This section describes how you can use the cassandra-source.

Knative source

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

cassandra-source-binding.yaml
apiVersion: camel.apache.org/v1alpha1
kind: KameletBinding
metadata:
  name: cassandra-source-binding
spec:
  source:
    ref:
      kind: Kamelet
      apiVersion: camel.apache.org/v1alpha1
      name: cassandra-source
    properties:
      connectionHost: localhost
      connectionPort: 9042
      keyspace: customers
      query: The Query
  sink:
    ref:
      kind: Channel
      apiVersion: messaging.knative.dev/v1
      name: mychannel

Prerequisite

You have Camel K installed on the cluster.

Procedure for using the cluster CLI

  1. Save the cassandra-source-binding.yaml file to your local drive, and then edit it as needed for your configuration.

  2. Run the source by using the following command:

    kubectl apply -f cassandra-source-binding.yaml

Procedure for using the Kamel CLI

Configure and run the source by using the following command:

kamel bind cassandra-source -p "source.connectionHost=localhost" -p "source.connectionPort=9042" -p "source.keyspace=customers" -p "source.query=The Query" channel:mychannel

This command creates the KameletBinding in the current namespace on the cluster.

Kafka source

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

cassandra-source-binding.yaml
apiVersion: camel.apache.org/v1alpha1
kind: KameletBinding
metadata:
  name: cassandra-source-binding
spec:
  source:
    ref:
      kind: Kamelet
      apiVersion: camel.apache.org/v1alpha1
      name: cassandra-source
    properties:
      connectionHost: localhost
      connectionPort: 9042
      keyspace: customers
      query: The Query
  sink:
    ref:
      kind: KafkaTopic
      apiVersion: kafka.strimzi.io/v1beta1
      name: my-topic

Prerequisites

  • You’ve installed Strimzi.

  • You’ve created a topic named my-topic in the current namespace.

  • You have Camel K installed on the cluster.

Procedure for using the cluster CLI

  1. Save the cassandra-source-binding.yaml file to your local drive, and then edit it as needed for your configuration.

  2. Run the source by using the following command:

    kubectl apply -f cassandra-source-binding.yaml

Procedure for using the Kamel CLI

Configure and run the source by using the following command:

kamel bind cassandra-source -p "source.connectionHost=localhost" -p "source.connectionPort=9042" -p "source.keyspace=customers" -p "source.query=The Query" kafka.strimzi.io/v1beta1:KafkaTopic:my-topic

This command creates the KameletBinding in the current namespace on the cluster.

Kamelet source file

https://github.com/apache/camel-kamelets/blob/main/kamelets/cassandra-source.kamelet.yaml

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