replace field action Replace Field Action

Provided by: "Apache Software Foundation"

Support Level for this Kamelet is: "Stable"

Replace field with a different key in the message in transit.

The required parameter 'renames' is a comma-separated list of colon-delimited renaming pairs like for example 'foo:bar,abc:xyz' and it represents the field rename mappings.

The optional parameter 'enabled' represents the fields to include. If specified, only the named fields will be included in the resulting message.

The optional parameter 'disabled' represents the fields to exclude. If specified, the listed fields will be excluded from the resulting message. This takes precedence over the 'enabled' parameter.

The default value of 'enabled' parameter is 'all', so all the fields of the payload will be included.

The default value of 'disabled' parameter is 'none', so no fields of the payload will be excluded.

Configuration Options

The following table summarizes the configuration options available for the replace-field-action Kamelet:

Property Name Description Type Default Example

renames

Renames

Required Comma separated list of field with new value to be renamed.

string

foo:bar,c1:c2

disabled

Disabled

Comma separated list of fields to be disabled.

string

none

enabled

Enabled

Comma separated list of fields to be enabled.

string

all

Dependencies

At runtime, the replace-field-action Kamelet relies upon the presence of the following dependencies:

  • mvn:org.apache.camel.kamelets:camel-kamelets-utils:4.5.0-SNAPSHOT

  • camel:core

  • camel:jackson

  • 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 replace-field-action.

Knative action

You can use the replace-field-action Kamelet as an intermediate step in a Knative binding.

replace-field-action-pipe.yaml
apiVersion: camel.apache.org/v1
kind: Pipe
metadata:
  name: replace-field-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: replace-field-action
      properties:
        renames: foo:bar,c1:c2
  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

  1. Save the replace-field-action-pipe.yaml file to your local drive, and then edit it as needed for your configuration.

  2. Run the action by using the following command:

    kubectl apply -f replace-field-action-pipe.yaml

Procedure for using the Kamel CLI

Configure and run the action by using the following command:

kamel bind replace-field-action -p "step-0.renames=foo:bar,c1:c2" channel:mychannel

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

Kafka action

You can use the replace-field-action Kamelet as an intermediate step in a Kafka binding.

replace-field-action-pipe.yaml
apiVersion: camel.apache.org/v1
kind: Pipe
metadata:
  name: replace-field-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: replace-field-action
      properties:
        renames: foo:bar,c1:c2
  sink:
    ref:
      kind: KafkaTopic
      apiVersion: kafka.strimzi.io/v1beta1
      name: my-topic

Prerequisites

  • You’ve installed Strimzi.

  • You’ve created a topic named my-topic in the current namespace.

  • You have Camel K installed on the cluster.

Procedure for using the cluster CLI

  1. Save the replace-field-action-pipe.yaml file to your local drive, and then edit it as needed for your configuration.

  2. Run the action by using the following command:

    kubectl apply -f replace-field-action-pipe.yaml

Procedure for using the Kamel CLI

Configure and run the action by using the following command:

kamel bind replace-field-action -p "step-0.renames=foo:bar,c1:c2" kafka.strimzi.io/v1beta1:KafkaTopic:my-topic

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