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Chapter 24. Insert Header Action

Adds a header with a constant value to the message in transit.

24.1. Configuration Options
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The following table summarizes the configuration options available for the insert-header-action Kamelet:

Expand
PropertyNameDescriptionTypeDefaultExample

name *

Name

The name of the header to add. For Knative only, the name of the header requires a CloudEvent (ce-) prefix.

string

  

value *

Value

The value of the header

string

  
Note

Fields marked with an asterisk (*) are mandatory.

24.2. Dependencies
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At runtime, the insert-header-action Kamelet relies upon the presence of the following dependencies:

  • camel:core
  • camel:kamelet

24.3. Usage
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This section describes how you can use the insert-header-action.

24.3.1. Knative Action
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You can use the insert-header-action Kamelet as an intermediate step in a Knative binding. The following example adds the ce-foo header to the data coming from the timer-source Kamelet. The CloudEvents (ce-) prefix for the header name is required.

insert-header-action-binding.yaml

apiVersion: camel.apache.org/v1alpha1
kind: KameletBinding
metadata:
  name: insert-header-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: insert-header-action
    properties:
      name: "ce-foo"
      value: "The Value"
  sink:
    ref:
      kind: Channel
      apiVersion: messaging.knative.dev/v1
      name: mychannel

24.3.1.1. Prerequisite
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Make sure you have "Red Hat Integration - Camel K" installed into the OpenShift cluster you’re connected to.

24.3.1.2. Procedure for using the cluster CLI
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  1. Save the insert-header-action-binding.yaml file to your local drive, and then edit it as needed for your configuration.

  2. Run the action by using the following command: 

    oc apply -f insert-header-action-binding.yaml

24.3.1.3. Procedure for using the Kamel CLI
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Configure and run the action by using the following command: 

kamel bind timer-source?message=Hello --step insert-header-action -p "step-0.name=ce-foo" -p "step-0.value=The Value" channel:mychannel

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

24.3.2. Kafka Action
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You can use the insert-header-action Kamelet as an intermediate step in a Kafka binding. The following example adds the foo header to the data coming from the timer-source Kamelet.

insert-header-action-binding.yaml

apiVersion: camel.apache.org/v1alpha1
kind: KameletBinding
metadata:
  name: timer-to-kafka
spec:
  source:
    ref:
      kind: Kamelet
      apiVersion: camel.apache.org/v1alpha1
      name: timer-source
    properties:
      period: "10000"
      message: 'msg'
  steps:
  - ref:
      kind: Kamelet
      apiVersion: camel.apache.org/v1alpha1
      name: insert-header-action
    properties:
      name: "foo"
      value: "The Value"
  sink:
    ref:
      kind: Kamelet
      apiVersion: camel.apache.org/v1alpha1
      name: kafka-sink
    properties:
      bootstrapServers: "my-cluster-kafka-bootstrap.myproject.svc:9092"
      password: "XXX"
      topic: "my-topic"
      user: "XXX"
      securityProtocol: "PLAINTEXT"

24.3.2.1. Prerequisites
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  • 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 sure that you have "Red Hat Integration - Camel K" installed on the OpenShift cluster that you’re connected to.

24.3.2.2. Procedure for using the cluster CLI
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  1. Save the insert-header-action-binding.yaml file to your local drive, and then edit it as needed for your configuration.

  2. Run the action by using the following command: 

    oc apply -f insert-header-action-binding.yaml

24.3.2.3. Procedure for using the Kamel CLI
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Configure and run the action by using the following command: 

kamel bind timer-source?message=Hello --step insert-header-action -p "step-0.name=foo" -p "step-0.value=The Value" kafka.strimzi.io/v1beta1:KafkaTopic:my-topic

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

24.4. Kamelet source file
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https://github.com/openshift-integration/kamelet-catalog/blob/kamelet-catalog-1.6/insert-header-action.kamelet.yaml

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