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Chapter 48. Replace Field Action
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.
48.1. Configuration Options
The following table summarizes the configuration options available for the replace-field-action Kamelet:
| Property | Name | Description | Type | Default | Example |
|---|---|---|---|---|---|
| renames * | Renames | Comma separated list of field with new value to be renamed | string |
| |
| disabled | Disabled | Comma separated list of fields to be disabled | string | "none" | |
| enabled | Enabled | Comma separated list of fields to be enabled | string | "all" |
Fields marked with an asterisk (*) are mandatory.
48.2. Dependencies
At runtime, the replace-field-action Kamelet relies upon the presence of the following dependencies:
- github:openshift-integration.kamelet-catalog:camel-kamelets-utils:kamelet-catalog-1.6-SNAPSHOT
- camel:core
- camel:jackson
- camel:kamelet
48.3. Usage
This section describes how you can use the replace-field-action.
48.3.1. Knative Action
You can use the replace-field-action Kamelet as an intermediate step in a Knative binding.
replace-field-action-binding.yaml
apiVersion: camel.apache.org/v1alpha1
kind: KameletBinding
metadata:
name: replace-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: replace-field-action
properties:
renames: "foo:bar,c1:c2"
sink:
ref:
kind: Channel
apiVersion: messaging.knative.dev/v1
name: mychannel
48.3.1.1. Prerequisite
Make sure you have "Red Hat Integration - Camel K" installed into the OpenShift cluster you’re connected to.
48.3.1.2. Procedure for using the cluster CLI
-
Save the
replace-field-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 replace-field-action-binding.yaml
48.3.1.3. Procedure for using the Kamel CLI
Configure and run the action by using the following command:
kamel bind timer-source?message=Hello --step replace-field-action -p "step-0.renames=foo:bar,c1:c2" channel:mychannel
This command creates the KameletBinding in the current namespace on the cluster.
48.3.2. Kafka Action
You can use the replace-field-action Kamelet as an intermediate step in a Kafka binding.
replace-field-action-binding.yaml
apiVersion: camel.apache.org/v1alpha1
kind: KameletBinding
metadata:
name: replace-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: replace-field-action
properties:
renames: "foo:bar,c1:c2"
sink:
ref:
kind: KafkaTopic
apiVersion: kafka.strimzi.io/v1beta1
name: my-topic
48.3.2.1. 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.
48.3.2.2. Procedure for using the cluster CLI
-
Save the
replace-field-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 replace-field-action-binding.yaml
48.3.2.3. Procedure for using the Kamel CLI
Configure and run the action by using the following command:
kamel bind timer-source?message=Hello --step replace-field-action -p "step-0.renames=foo:bar,c1:c2" kafka.strimzi.io/v1beta1:KafkaTopic:my-topic
This command creates the KameletBinding in the current namespace on the cluster.
