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Chapter 3. Avro Serialize Action

Serialize payload to Avro

3.1. Configuration Options
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The following table summarizes the configuration options available for the avro-serialize-action Kamelet:

Expand
PropertyNameDescriptionTypeDefaultExample

schema *

Schema

The Avro schema to use during serialization (as single-line, using JSON format)

string

 

"{\"type\": \"record\", \"namespace\": \"com.example\", \"name\": \"FullName\", \"fields\": [{\"name\": \"first\", \"type\": \"string\"},{\"name\": \"last\", \"type\": \"string\"}]}"

validate

Validate

Indicates if the content must be validated against the schema

boolean

true

 
Note

Fields marked with an asterisk (*) are mandatory.

3.2. Dependencies
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At runtime, the avro-serialize-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-avro

3.3. Usage
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This section describes how you can use the avro-serialize-action.

3.3.1. Knative Action
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You can use the avro-serialize-action Kamelet as an intermediate step in a Knative binding.

avro-serialize-action-binding.yaml

apiVersion: camel.apache.org/v1alpha1
kind: KameletBinding
metadata:
  name: avro-serialize-action-binding
spec:
  source:
    ref:
      kind: Kamelet
      apiVersion: camel.apache.org/v1alpha1
      name: timer-source
    properties:
      message: '{"first":"Ada","last":"Lovelace"}'
  steps:
  - ref:
      kind: Kamelet
      apiVersion: camel.apache.org/v1alpha1
      name: json-deserialize-action
  - ref:
      kind: Kamelet
      apiVersion: camel.apache.org/v1alpha1
      name: avro-serialize-action
    properties:
      schema: "{\"type\": \"record\", \"namespace\": \"com.example\", \"name\": \"FullName\", \"fields\": [{\"name\": \"first\", \"type\": \"string\"},{\"name\": \"last\", \"type\": \"string\"}]}"
  sink:
    ref:
      kind: Channel
      apiVersion: messaging.knative.dev/v1
      name: mychannel
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3.3.1.1. Prerequisite
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Make sure you have "Red Hat Integration - Camel K" installed into the OpenShift cluster you’re connected to.

3.3.1.2. Procedure for using the cluster CLI
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  1. Save the avro-serialize-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 avro-serialize-action-binding.yaml
    Copy to Clipboard Toggle word wrap

3.3.1.3. 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={\"first\":\"Ada\",\"last\":\"Lovelace\"}" --step json-deserialize-action --step avro-serialize-action -p "step-1.schema={\"type\":\"record\", \"namespace\": \"com.example\", \"name\": \"FullName\", \"fields\": [{\"name\": \"first\", \"type\": \"string\"},{\"name\": \"last\", \"type\": \"string\"}]}" channel:mychannel
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This command creates the KameletBinding in the current namespace on the cluster.

3.3.2. Kafka Action
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You can use the avro-serialize-action Kamelet as an intermediate step in a Kafka binding.

avro-serialize-action-binding.yaml

apiVersion: camel.apache.org/v1alpha1
kind: KameletBinding
metadata:
  name: avro-serialize-action-binding
spec:
  source:
    ref:
      kind: Kamelet
      apiVersion: camel.apache.org/v1alpha1
      name: timer-source
    properties:
      message: '{"first":"Ada","last":"Lovelace"}'
  steps:
  - ref:
      kind: Kamelet
      apiVersion: camel.apache.org/v1alpha1
      name: json-deserialize-action
  - ref:
      kind: Kamelet
      apiVersion: camel.apache.org/v1alpha1
      name: avro-serialize-action
    properties:
      schema: "{\"type\": \"record\", \"namespace\": \"com.example\", \"name\": \"FullName\", \"fields\": [{\"name\": \"first\", \"type\": \"string\"},{\"name\": \"last\", \"type\": \"string\"}]}"
  sink:
    ref:
      kind: KafkaTopic
      apiVersion: kafka.strimzi.io/v1beta1
      name: my-topic
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3.3.2.1. 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.

3.3.2.2. Procedure for using the cluster CLI
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  1. Save the avro-serialize-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 avro-serialize-action-binding.yaml
    Copy to Clipboard Toggle word wrap

3.3.2.3. 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={\"first\":\"Ada\",\"last\":\"Lovelace\"}" --step json-deserialize-action --step avro-serialize-action -p "step-1.schema={\"type\":\"record\", \"namespace\": \"com.example\", \"name\": \"FullName\", \"fields\": [{\"name\": \"first\", \"type\": \"string\"},{\"name\": \"last\", \"type\": \"string\"}]}" kafka.strimzi.io/v1beta1:KafkaTopic:my-topic
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This command creates the KameletBinding in the current namespace on the cluster.

3.4. Kamelet source file
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https://github.com/openshift-integration/kamelet-catalog/blob/kamelet-catalog-1.6/avro-serialize-action.kamelet.yaml

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