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Chapter 17. Extract Field Action

Extract a field from the body

17.1. Configuration Options
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The following table summarizes the configuration options available for the extract-field-action Kamelet:

Expand
PropertyNameDescriptionTypeDefaultExample

field *

Field

The name of the field to be added

string

  
Note

Fields marked with an asterisk (*) are mandatory.

17.2. Dependencies
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At runtime, the extract-field-action Kamelet relies upon the presence of the following dependencies:

  • mvn:org.apache.camel.kamelets:camel-kamelets-utils:1.0.0.fuse-800048-redhat-00001
  • camel:kamelet
  • camel:core
  • camel:jackson

17.3. Usage
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This section describes how you can use the extract-field-action.

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

extract-field-action-binding.yaml

apiVersion: camel.apache.org/v1alpha1
kind: KameletBinding
metadata:
  name: extract-field-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: extract-field-action
    properties:
      field: "The Field"
  sink:
    ref:
      kind: Channel
      apiVersion: messaging.knative.dev/v1
      name: mychannel
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17.3.1.1. Prerequisite
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Make sure you have "Red Hat Integration - Camel K" installed into the OpenShift cluster you’re connected to.

17.3.1.2. Procedure for using the cluster CLI
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  1. Save the extract-field-action-binding.yaml file to your local drive, and then edit it as needed for your configuration.

  2. Run the action by using the following command: 

    oc apply -f extract-field-action-binding.yaml
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17.3.1.3. Procedure for using the Kamel CLI
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Configure and run the action by using the following command: 

kamel bind timer-source?message=Hello --step extract-field-action -p "step-0.field=The Field" channel:mychannel
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This command creates the KameletBinding in the current namespace on the cluster.

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

extract-field-action-binding.yaml

apiVersion: camel.apache.org/v1alpha1
kind: KameletBinding
metadata:
  name: extract-field-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: extract-field-action
    properties:
      field: "The Field"
  sink:
    ref:
      kind: KafkaTopic
      apiVersion: kafka.strimzi.io/v1beta1
      name: my-topic
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17.3.2.1. Prerequisites
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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.

17.3.2.2. Procedure for using the cluster CLI
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  1. Save the extract-field-action-binding.yaml file to your local drive, and then edit it as needed for your configuration.

  2. Run the action by using the following command: 

    oc apply -f extract-field-action-binding.yaml
    Copy to Clipboard Toggle word wrap

17.3.2.3. Procedure for using the Kamel CLI
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Configure and run the action by using the following command: 

kamel bind timer-source?message=Hello --step extract-field-action -p "step-0.field=The Field" kafka.strimzi.io/v1beta1:KafkaTopic:my-topic
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This command creates the KameletBinding in the current namespace on the cluster.

17.4. Kamelet source file
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https://github.com/openshift-integration/kamelet-catalog/blob/kamelet-catalog-1.6/extract-field-action.kamelet.yaml

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