Kafka Topic Name Matches Filter Action

Provided by: "Apache Software Foundation"

Support Level for this Kamelet is: "Stable"

Filter based on kafka topic value compared to regex

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	Required The Regex to Evaluate against the Kafka topic name.	string

Property

Name

Description

Type

Default

Example

regex

Regex

Required The Regex to Evaluate against the Kafka topic name.

string

Dependencies

At runtime, the topic-name-matches-filter-action Kamelet relies upon the presence of the following dependencies:

camel:core
camel:kamelet

Camel JBang usage

Prerequisites

You’ve installed JBang.
You have executed the following command:

jbang app install camel@apache/camel

Supposing you have a file named route.yaml with this content:

- route:
    from:
      uri: "kamelet:timer-source"
      parameters:
        period: 10000
        message: 'test'
      steps:
        - to:
            uri: "kamelet:log-sink"

You can now run it directly through the following command

camel run route.yaml

Camel K Environment Usage

This section describes how you can use the topic-name-matches-filter-action.

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-pipe.yaml

apiVersion: camel.apache.org/v1
kind: Pipe
metadata:
  name: topic-name-matches-filter-action-pipe
spec:
  source:
    ref:
      kind: Kamelet
      apiVersion: camel.apache.org/v1
      name: kafka-source
      properties:
        bootstrapServers: localhost:9092
        topic: mytopic
        user: kafka
        password: kafka123!
  steps:
    - ref:
        kind: Kamelet
        apiVersion: camel.apache.org/v1
        name: topic-name-matches-filter-action
      properties:
        regex: The Regex
  sink:
    ref:
      kind: Channel
      apiVersion: messaging.knative.dev/v1
      name: mychannel

Prerequisite

You have Camel K installed on the cluster.

Procedure for using the cluster CLI

Save the topic-name-matches-filter-action-pipe.yaml file to your local drive, and then edit it as needed for your configuration.

Run the action by using the following command:

kubectl apply -f topic-name-matches-filter-action-pipe.yaml

Procedure for using the Kamel CLI

Configure and run the action by using the following command:

kamel bind channel:mychannel -p "step-0.regex=The Regex" topic-name-matches-filter-action

This command creates the Kamelet Pipe in the current namespace on the cluster.

Kafka action

You can use the topic-name-matches-filter-action Kamelet as an intermediate step in a Kafka binding.