Freemarker Template Action
Provided by: "Apache Software Foundation"
Support Level for this Kamelet is: "Stable"
Apply a Freemarker Template.
Dependencies
At runtime, the freemarker-template-action Kamelet relies upon the presence of the following dependencies:
-
camel:freemarker
-
camel:kamelet
Camel JBang usage
Prerequisites
-
You’ve installed JBang.
-
You have executed the following command:
jbang app install camel@apache/camelSupposing 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.yamlCamel K Environment Usage
This section describes how you can use the freemarker-template-action.
Knative action
You can use the freemarker-template-action Kamelet as an intermediate step in a Knative binding.
apiVersion: camel.apache.org/v1
kind: KameletBinding
metadata:
name: freemarker-template-action-binding
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: freemarker-template-action
properties:
template: file:////template.ftl
sink:
ref:
kind: Channel
apiVersion: messaging.knative.dev/v1
name: mychannelPrerequisite
You have Camel K installed on the cluster.
Kafka action
You can use the freemarker-template-action Kamelet as an intermediate step in a Kafka binding.
apiVersion: camel.apache.org/v1
kind: KameletBinding
metadata:
name: freemarker-template-action-binding
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: freemarker-template-action
properties:
template: file:////template.ftl
sink:
ref:
kind: KafkaTopic
apiVersion: kafka.strimzi.io/v1beta1
name: my-topicPrerequisites
-
You’ve installed Strimzi.
-
You’ve created a topic named
my-topicin the current namespace. -
You have Camel K installed on the cluster.
Procedure for using the cluster CLI
-
Save the
freemarker-template-action-binding.yamlfile to your local drive, and then edit it as needed for your configuration. -
Run the action by using the following command:
kubectl apply -f freemarker-template-action-binding.yaml
Procedure for using the Kamel CLI
Configure and run the action by using the following command:
kamel bind kafka.strimzi.io/v1beta1:KafkaTopic:my-topic -p "step-0.template=\file:////template.ftl" freemarker-template-actionThis command creates the KameletBinding in the current namespace on the cluster.