Red Hat SummitChapter 20. Has Header Filter Action
Filter based on the presence of one header
20.1. 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, the name of the header requires a CloudEvent ( | string |
|
Fields marked with an asterisk (*) are mandatory.
20.2. Dependencies
At runtime, the has-header-filter-action Kamelet relies upon the presence of the following dependencies:
- camel:core
- camel:kamelet
20.3. Usage
This section describes how you can use the has-header-filter-action.
20.3.1. Knative Action
You can use the has-header-filter-action Kamelet as an intermediate step in a Knative binding. For this example, the Knative mychannel provides a message header named ce-foo. The CloudEvents (ce-) prefix for the header name is required. The example in the Insert Header action shows how to add a message header to data.
has-header-filter-action-binding.yaml
apiVersion: camel.apache.org/v1alpha1
kind: KameletBinding
metadata:
name: has-header-filter-action-binding
spec:
source:
ref:
kind: Channel
apiVersion: messaging.knative.dev/v1
name: mychannel
steps:
- ref:
kind: Kamelet
apiVersion: camel.apache.org/v1alpha1
name: has-header-filter-action
properties:
name: "ce-foo"
sink:
uri: "log:info"20.3.1.1. Prerequisites
- Make sure you have "Red Hat Integration - Camel K" installed on the OpenShift cluster that you’re connected to.
-
The source Kamelet in the Kamelet Binding must pass a header with the name that you specify in the
has-header-filter-actionKamelet’snameproperty.
20.3.1.2. Procedure for using the cluster CLI
-
Save the
has-header-filter-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 has-header-filter-action-binding.yaml
20.3.1.3. Procedure for using the Kamel CLI
Configure and run the action by using the following command:
kamel bind timer-source?message=Hello --step has-header-filter-action -p "step-0.name=ce-foo" channel:mychannelThis command creates the KameletBinding in the current namespace on the cluster.
20.3.2. Kafka Action
You can use the has-header-filter-action Kamelet as an intermediate step in a Kafka binding. For this example, the kafka-source Kamelet provides a message header named foo. The example in the Insert Header action shows how to add a message header to data.
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: kafka-source
properties:
bootstrapServers: "my-cluster-kafka-bootstrap.myproject.svc:9092"
password: "XXX"
topic: "my-topic"
user: "XXX"
securityProtocol: "PLAINTEXT"
steps:
- ref:
kind: Kamelet
apiVersion: camel.apache.org/v1alpha1
name: has-header-filter-action
properties:
name: "foo"
sink:
uri: "log:info"20.3.2.1. Prerequisites
-
Ensure that you’ve installed the AMQ Streams operator in your OpenShift cluster and created a topic named
my-topicin the current namespace. - Make sure that you have "Red Hat Integration - Camel K" installed on the OpenShift cluster that you’re connected to.
20.3.2.2. Procedure for using the cluster CLI
-
Save the
has-header-filter-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 has-header-filter-action-binding.yaml
20.3.2.3. Procedure for using the Kamel CLI
Configure and run the action by using the following command:
kamel bind timer-source?message=Hello --step has-header-filter-action -p "step-0.name=foo" kafka.strimzi.io/v1beta1:KafkaTopic:my-topicThis command creates the KameletBinding in the current namespace on the cluster.
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