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Chapter 33. Kafka Topic Name Matches Filter Action
Filter based on kafka topic value compared to regex
33.1. Configuration Options
The following table summarizes the configuration options available for the topic-name-matches-filter-action Kamelet:
| Property | Name | Description | Type | Default | Example |
|---|---|---|---|---|---|
| regex * | Regex | The Regex to Evaluate against the Kafka topic name | string |
Fields marked with an asterisk (*) are mandatory.
33.2. Dependencies
At runtime, the topic-name-matches-filter-action Kamelet relies upon the presence of the following dependencies:
- camel:core
- camel:kamelet
33.3. Usage
This section describes how you can use the topic-name-matches-filter-action.
33.3.1. Knative Action
You can use the topic-name-matches-filter-action Kamelet as an intermediate step in a Knative binding.
topic-name-matches-filter-action-binding.yaml
apiVersion: camel.apache.org/v1alpha1
kind: KameletBinding
metadata:
name: topic-name-matches-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: topic-name-matches-filter-action
properties:
regex: "The Regex"
sink:
ref:
kind: Channel
apiVersion: messaging.knative.dev/v1
name: mychannel33.3.1.1. Prerequisite
Make sure you have "Red Hat Integration - Camel K" installed into the OpenShift cluster you’re connected to.
33.3.1.2. Procedure for using the cluster CLI
-
Save the
topic-name-matches-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 topic-name-matches-filter-action-binding.yaml
33.3.1.3. Procedure for using the Kamel CLI
Configure and run the action by using the following command:
kamel bind timer-source?message=Hello --step topic-name-matches-filter-action -p "step-0.regex=The Regex" channel:mychannelThis command creates the KameletBinding in the current namespace on the cluster.
33.3.2. Kafka Action
You can use the topic-name-matches-filter-action Kamelet as an intermediate step in a Kafka binding.
topic-name-matches-filter-action-binding.yaml
apiVersion: camel.apache.org/v1alpha1
kind: KameletBinding
metadata:
name: topic-name-matches-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: topic-name-matches-filter-action
properties:
regex: "The Regex"
sink:
ref:
kind: KafkaTopic
apiVersion: kafka.strimzi.io/v1beta1
name: my-topic33.3.2.1. 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.
33.3.2.2. Procedure for using the cluster CLI
-
Save the
topic-name-matches-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 topic-name-matches-filter-action-binding.yaml
33.3.2.3. Procedure for using the Kamel CLI
Configure and run the action by using the following command:
kamel bind timer-source?message=Hello --step topic-name-matches-filter-action -p "step-0.regex=The Regex" kafka.strimzi.io/v1beta1:KafkaTopic:my-topicThis command creates the KameletBinding in the current namespace on the cluster.
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