Chapter 26. Has Header Filter Action Filter based on the presence of one header 26.1. Configuration Options The following table summarizes the configuration options available for the has-header-filter-action Kamelet: Property Name Description Type Default Example name * Header Name The header name to evaluate. The header name must be passed by the source Kamelet. For Knative only, if you are using Cloud Events, you must include the CloudEvent (ce-) prefix in the header name. string "headerName" Note Fields marked with an asterisk (*) are mandatory. 26.2. Dependencies At runtime, the has-header-filter-action Kamelet relies upon the presence of the following dependencies: camel:core camel:kamelet 26.3. Usage This section describes how you can use the has-header-filter-action . 26.3.1. Knative Action You can use the has-header-filter-action Kamelet as an intermediate step in a Knative binding. has-header-filter-action-binding.yaml apiVersion: camel.apache.org/v1alpha1 kind: KameletBinding metadata: name: has-header-filter-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: "my-header" value: "my-value" - ref: kind: Kamelet apiVersion: camel.apache.org/v1alpha1 name: has-header-filter-action properties: name: "my-header" sink: ref: kind: Channel apiVersion: messaging.knative.dev/v1 name: mychannel 26.3.1.1. Prerequisite Make sure you have "Red Hat Integration - Camel K" installed into the OpenShift cluster you're connected to. 26.3.1.2. Procedure for using the cluster CLI Save the has-header-filter-action-binding.yaml file to your local drive, and then edit it as needed for your configuration. Run the action by using the following command: oc apply -f has-header-filter-action-binding.yaml 26.3.1.3. Procedure for using the Kamel CLI Configure and run the action by using the following command: kamel bind --name has-header-filter-action-binding timer-source?message="Hello" --step insert-header-action -p "step-0.name=my-header" -p "step-0.value=my-value" --step has-header-filter-action -p "step-1.name=my-header" channel:mychannel This command creates the KameletBinding in the current namespace on the cluster. 26.3.2. Kafka Action You can use the has-header-filter-action Kamelet as an intermediate step in a Kafka binding. has-header-filter-action-binding.yaml apiVersion: camel.apache.org/v1alpha1 kind: KameletBinding metadata: name: has-header-filter-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: "my-header" value: "my-value" - ref: kind: Kamelet apiVersion: camel.apache.org/v1alpha1 name: has-header-filter-action properties: name: "my-header" sink: ref: kind: KafkaTopic apiVersion: kafka.strimzi.io/v1beta1 name: my-topic 26.3.2.1. 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. 26.3.2.2. Procedure for using the cluster CLI Save the has-header-filter-action-binding.yaml file to your local drive, and then edit it as needed for your configuration. Run the action by using the following command: oc apply -f has-header-filter-action-binding.yaml 26.3.2.3. Procedure for using the Kamel CLI Configure and run the action by using the following command: kamel bind --name has-header-filter-action-binding timer-source?message="Hello" --step insert-header-action -p "step-0.name=my-header" -p "step-0.value=my-value" --step has-header-filter-action -p "step-1.name=my-header" kafka.strimzi.io/v1beta1:KafkaTopic:my-topic This command creates the KameletBinding in the current namespace on the cluster. 26.4. Kamelet source file https://github.com/openshift-integration/kamelet-catalog/has-header-filter-action.kamelet.yaml

Commands:
apiVersion: camel.apache.org/v1alpha1 kind: KameletBinding metadata: name: has-header-filter-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: "my-header" value: "my-value" - ref: kind: Kamelet apiVersion: camel.apache.org/v1alpha1 name: has-header-filter-action properties: name: "my-header" sink: ref: kind: Channel apiVersion: messaging.knative.dev/v1 name: mychannel
apply -f has-header-filter-action-binding.yaml
kamel bind --name has-header-filter-action-binding timer-source?message="Hello" --step insert-header-action -p "step-0.name=my-header" -p "step-0.value=my-value" --step has-header-filter-action -p "step-1.name=my-header" channel:mychannel
apiVersion: camel.apache.org/v1alpha1 kind: KameletBinding metadata: name: has-header-filter-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: "my-header" value: "my-value" - ref: kind: Kamelet apiVersion: camel.apache.org/v1alpha1 name: has-header-filter-action properties: name: "my-header" sink: ref: kind: KafkaTopic apiVersion: kafka.strimzi.io/v1beta1 name: my-topic
apply -f has-header-filter-action-binding.yaml
kamel bind --name has-header-filter-action-binding timer-source?message="Hello" --step insert-header-action -p "step-0.name=my-header" -p "step-0.value=my-value" --step has-header-filter-action -p "step-1.name=my-header" kafka.strimzi.io/v1beta1:KafkaTopic:my-topic