Chapter 14. Cassandra Sink
The Cassandra Sink Kamelet is a Technology Preview feature only. Technology Preview features are not supported with Red Hat production service level agreements (SLAs) and might not be functionally complete. Red Hat does not recommend using them in production.
These features provide early access to upcoming product features, enabling customers to test functionality and provide feedback during the development process. For more information about the support scope of Red Hat Technology Preview features, see https://access.redhat.com/support/offerings/techpreview.
Send data to a Cassandra Cluster.
This Kamelet expects the body as JSON Array. The content of the JSON Array will be used as input for the CQL Prepared Statement set in the query parameter.
14.1. Configuration Options
The following table summarizes the configuration options available for the cassandra-sink Kamelet:
| Property | Name | Description | Type | Default | Example |
|---|---|---|---|---|---|
| connectionHost * | Connection Host | Hostname(s) cassandra server(s). Multiple hosts can be separated by comma. | string |
| |
| connectionPort * | Connection Port | Port number of cassandra server(s) | string |
| |
| keyspace * | Keyspace | Keyspace to use | string |
| |
| password * | Password | The password to use for accessing a secured Cassandra Cluster | string | ||
| preparedStatement * | Prepared Statement | The Prepared statement to execute against the Cassandra cluster table | string | ||
| username * | Username | The username to use for accessing a secured Cassandra Cluster | 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 |
|
Fields marked with an asterisk (*) are mandatory.
14.2. Dependencies
At runtime, the cassandra-sink Kamelet relies upon the presence of the following dependencies:
- camel:jackson
- camel:kamelet
- camel:cassandraql
14.3. Usage
This section describes how you can use the cassandra-sink.
14.3.1. Knative Sink
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/v1alpha1
kind: KameletBinding
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/v1alpha1
name: cassandra-sink
properties:
connectionHost: "localhost"
connectionPort: 9042
keyspace: "customers"
password: "The Password"
preparedStatement: "The Prepared Statement"
username: "The Username"
14.3.1.1. Prerequisite
Make sure you have "Red Hat Integration - Camel K" installed into the OpenShift cluster you’re connected to.
14.3.1.2. Procedure for using the cluster CLI
-
Save the
cassandra-sink-binding.yamlfile to your local drive, and then edit it as needed for your configuration. Run the sink by using the following command:
oc apply -f cassandra-sink-binding.yaml
14.3.1.3. Procedure for using the Kamel CLI
Configure and run the sink by using the following command:
kamel bind channel:mychannel cassandra-sink -p "sink.connectionHost=localhost" -p sink.connectionPort=9042 -p "sink.keyspace=customers" -p "sink.password=The Password" -p "sink.preparedStatement=The Prepared Statement" -p "sink.username=The Username"
This command creates the KameletBinding in the current namespace on the cluster.
14.3.2. Kafka Sink
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/v1alpha1
kind: KameletBinding
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/v1alpha1
name: cassandra-sink
properties:
connectionHost: "localhost"
connectionPort: 9042
keyspace: "customers"
password: "The Password"
preparedStatement: "The Prepared Statement"
username: "The Username"
14.3.2.1. Prerequisites
Ensure that you’ve installed the AMQ Streams operator in your OpenShift cluster and created a topic named my-topic in the current namespace. Make also sure you have "Red Hat Integration - Camel K" installed into the OpenShift cluster you’re connected to.
14.3.2.2. Procedure for using the cluster CLI
-
Save the
cassandra-sink-binding.yamlfile to your local drive, and then edit it as needed for your configuration. Run the sink by using the following command:
oc apply -f cassandra-sink-binding.yaml
14.3.2.3. Procedure for using the Kamel CLI
Configure and run the sink by using the following command:
kamel bind kafka.strimzi.io/v1beta1:KafkaTopic:my-topic cassandra-sink -p "sink.connectionHost=localhost" -p sink.connectionPort=9042 -p "sink.keyspace=customers" -p "sink.password=The Password" -p "sink.preparedStatement=The Prepared Statement" -p "sink.username=The Username"
This command creates the KameletBinding in the current namespace on the cluster.
