docs/modules/ROOT/pages/mustache-template-action.adoc

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= image:kamelets/mustache-template-action.svg[] Mustache Template Action

*Provided by: "Apache Software Foundation"*

*Support Level for this Kamelet is: "Preview"*

Apply a Mustache Template.

The template property needs to be encoded in base64, so when you pass it as parameter, don't forget to encode it.

== Configuration Options

The following table summarizes the configuration options available for the `mustache-template-action` Kamelet:
[width="100%",cols="2,^2,3,^2,^2,^3",options="header"]
|===
| Property| Name| Description| Type| Default| Example
| *template {empty}* *| Template| The inline template| binary| | 
|===

NOTE: Fields marked with ({empty}*) are mandatory.

== Usage

This section summarizes how the `mustache-template-action` can be used in various contexts.

=== Knative Action

The `mustache-template-action` Kamelet can be used as intermediate step in a Knative binding.

.mustache-template-action-binding.yaml
[source,yaml]
----
apiVersion: camel.apache.org/v1alpha1
kind: KameletBinding
metadata:
  name: mustache-template-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: mustache-template-action
    properties:
      template: "The Template"
  sink:
    ref:
      kind: InMemoryChannel
      apiVersion: messaging.knative.dev/v1
      name: mychannel

----
Make sure you have xref:latest@camel-k::installation/installation.adoc[Camel K installed] into the Kubernetes cluster you're connected to.

Save the `mustache-template-action-binding.yaml` file into your hard drive, then configure it according to your needs.

You can run the action using the following command:

[source,shell]
----
kubectl apply -f mustache-template-action-binding.yaml
----

==== *Dependencies*

The Kamelet needs the following dependencies:

- camel:mustache
- camel:kamelet 

==== *Binding to Knative using the Kamel CLI:*

The procedure described above can be simplified into a single execution of the `kamel bind` command:

[source,shell]
----
kamel bind timer-source?message=Hello --step mustache-template-action -p "step-0.template=The Template" channel:mychannel
----

This will create the KameletBinding under the hood and apply it to the current namespace in the cluster.

=== Kafka Action

The `mustache-template-action` Kamelet can be used as intermediate step in a Kafka binding.

.mustache-template-action-binding.yaml
[source,yaml]
----
apiVersion: camel.apache.org/v1alpha1
kind: KameletBinding
metadata:
  name: mustache-template-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: mustache-template-action
    properties:
      template: "The Template"
  sink:
    ref:
      kind: KafkaTopic
      apiVersion: kafka.strimzi.io/v1beta1
      name: my-topic

----

Ensure that you've installed https://strimzi.io/[Strimzi] and created a topic named `my-topic` in the current namespace.
Make also sure you have xref:latest@camel-k::installation/installation.adoc[Camel K installed] into the Kubernetes cluster you're connected to.

Save the `mustache-template-action-binding.yaml` file into your hard drive, then configure it according to your needs.

You can run the action using the following command:

[source,shell]
----
kubectl apply -f mustache-template-action-binding.yaml
----

==== *Binding to Kafka using the Kamel CLI:*

The procedure described above can be simplified into a single execution of the `kamel bind` command:

[source,shell]
----
kamel bind timer-source?message=Hello --step mustache-template-action -p "step-0.template=The Template" kafka.strimzi.io/v1beta1:KafkaTopic:my-topic
----

This will create the KameletBinding under the hood and apply it to the current namespace in the cluster.

==== Kamelet source file

Have a look at the following link:

https://github.com/apache/camel-kamelets/blob/main/mustache-template-action.kamelet.yaml

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