Chapter 55. Value to Key Action
Replace the Kafka record key with a new key formed from a subset of fields in the body
55.1. Configuration Options
The following table summarizes the configuration options available for the value-to-key-action Kamelet:
| Property | Name | Description | Type | Default | Example |
|---|---|---|---|---|---|
| fields * | Fields | Comma separated list of fields to be used to form the new key | string |
Fields marked with an asterisk (*) are mandatory.
55.2. Dependencies
At runtime, the value-to-key-action Kamelet relies upon the presence of the following dependencies:
- mvn:org.apache.camel.kamelets:camel-kamelets-utils:1.0.0.fuse-800048-redhat-00001
- camel:core
- camel:jackson
- camel:kamelet
55.3. Usage
This section describes how you can use the value-to-key-action.
55.3.1. Knative Action
You can use the value-to-key-action Kamelet as an intermediate step in a Knative binding.
value-to-key-action-binding.yaml
apiVersion: camel.apache.org/v1alpha1
kind: KameletBinding
metadata:
name: value-to-key-action-binding
spec:
source:
ref:
kind: Kamelet
apiVersion: camel.apache.org/v1alpha1
name: timer-source
properties:
message: "Hello"
steps:
- ref:
kind: Kamelet
apiVersion: camel.apache.org/v1alpha1
name: value-to-key-action
properties:
fields: "The Fields"
sink:
ref:
kind: Channel
apiVersion: messaging.knative.dev/v1
name: mychannel
55.3.1.1. Prerequisite
Make sure you have "Red Hat Integration - Camel K" installed into the OpenShift cluster you’re connected to.
55.3.1.2. Procedure for using the cluster CLI
-
Save the
value-to-key-action-binding.yamlfile to your local drive, and then edit it as needed for your configuration. Run the action by using the following command:
oc apply -f value-to-key-action-binding.yaml
55.3.1.3. Procedure for using the Kamel CLI
Configure and run the action by using the following command:
kamel bind timer-source?message=Hello --step value-to-key-action -p "step-0.fields=The Fields" channel:mychannel
This command creates the KameletBinding in the current namespace on the cluster.
55.3.2. Kafka Action
You can use the value-to-key-action Kamelet as an intermediate step in a Kafka binding.
value-to-key-action-binding.yaml
apiVersion: camel.apache.org/v1alpha1
kind: KameletBinding
metadata:
name: value-to-key-action-binding
spec:
source:
ref:
kind: Kamelet
apiVersion: camel.apache.org/v1alpha1
name: timer-source
properties:
message: "Hello"
steps:
- ref:
kind: Kamelet
apiVersion: camel.apache.org/v1alpha1
name: value-to-key-action
properties:
fields: "The Fields"
sink:
ref:
kind: KafkaTopic
apiVersion: kafka.strimzi.io/v1beta1
name: my-topic
55.3.2.1. 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.
55.3.2.2. Procedure for using the cluster CLI
-
Save the
value-to-key-action-binding.yamlfile to your local drive, and then edit it as needed for your configuration. Run the action by using the following command:
oc apply -f value-to-key-action-binding.yaml
55.3.2.3. Procedure for using the Kamel CLI
Configure and run the action by using the following command:
kamel bind timer-source?message=Hello --step value-to-key-action -p "step-0.fields=The Fields" kafka.strimzi.io/v1beta1:KafkaTopic:my-topic
This command creates the KameletBinding in the current namespace on the cluster.
