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Chapter 41. JSLT Action

Apply a JSLT query or transformation on JSON.

41.1. Configuration Options
링크 복사

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

Expand
PropertyNameDescriptionTypeDefaultExample

template *

Template

The inline template for JSLT Transformation

string

 

"file://template.json"

Note

Fields marked with an asterisk (*) are mandatory.

41.2. Dependencies
링크 복사

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

  • camel:jslt
  • camel:kamelet

41.3. Usage
링크 복사

This section describes how you can use the jslt-action.

41.3.1. Knative Action
링크 복사

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

jslt-action-binding.yaml

apiVersion: camel.apache.org/v1alpha1
kind: KameletBinding
metadata:
  name: jslt-action-binding
spec:
  source:
    ref:
      kind: Kamelet
      apiVersion: camel.apache.org/v1alpha1
      name: timer-source
    properties:
      message: {"foo" : "bar"}
  steps:
  - ref:
      kind: Kamelet
      apiVersion: camel.apache.org/v1alpha1
      name: jslt-action
    properties:
      template: "file://template.json"
  sink:
    ref:
      kind: Channel
      apiVersion: messaging.knative.dev/v1
      name: mychannel
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41.3.1.1. Prerequisite
링크 복사

Make sure you have "Red Hat Integration - Camel K" installed into the OpenShift cluster you are connected to.

41.3.1.2. Procedure for using the cluster CLI
링크 복사

  1. Save the jslt-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 jslt-action-binding.yaml
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41.3.1.3. Procedure for using the Kamel CLI
링크 복사

Configure and run the action by using the following command: 

kamel bind timer-source?message=Hello --step jslt-action -p "step-0.template=file://template.json" channel:mychannel
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This command creates the KameletBinding in the current namespace on the cluster.

If the template points to a file that is not in the current directory, and if file:// or classpath:// is used, supply the transformation using the secret or the configmap.

To view examples, see with secret and with configmap. For details about necessary traits, see Mount trait and JVM classpath trait.

41.3.2. Kafka Action
링크 복사

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

jslt-action-binding.yaml

apiVersion: camel.apache.org/v1alpha1
kind: KameletBinding
metadata:
  name: jslt-action-binding
spec:
  source:
    ref:
      kind: Kamelet
      apiVersion: camel.apache.org/v1alpha1
      name: timer-source
    properties:
      message: {"foo" : "bar"}
  steps:
  - ref:
      kind: Kamelet
      apiVersion: camel.apache.org/v1alpha1
      name: jslt-action
    properties:
      template: "file://template.json"
  sink:
    ref:
      kind: KafkaTopic
      apiVersion: kafka.strimzi.io/v1beta1
      name: my-topic
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41.3.2.1. Prerequisites
링크 복사

Ensure that you have installed the AMQ Streams operator in your OpenShift cluster and create a topic named my-topic in the current namespace. Also, you must have "Red Hat Integration - Camel K" installed into the OpenShift cluster you are connected to.

41.3.2.2. Procedure for using the cluster CLI
링크 복사

  1. Save the jslt-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 jslt-action-binding.yaml
    Copy to Clipboard Toggle word wrap

41.3.2.3. Procedure for using the Kamel CLI
링크 복사

Configure and run the action by using the following command: 

kamel bind timer-source?message=Hello --step jslt-action -p "step-0.template=file://template.json" kafka.strimzi.io/v1beta1:KafkaTopic:my-topic
Copy to Clipboard Toggle word wrap

This command creates the KameletBinding in the current namespace on the cluster.

41.4. Kamelet source file
링크 복사

https://github.com/openshift-integration/kamelet-catalog/blob/main/jslt-action.kamelet.yaml

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