Chapter 57. Telegram Source
Receive all messages that people send to your Telegram bot.
To create a bot, contact the @botfather account using the Telegram app.
The source attaches the following headers to the messages:
-
chat-id/ce-chatid: the ID of the chat where the message comes from
57.1. Configuration Options
The following table summarizes the configuration options available for the telegram-source Kamelet:
| Property | Name | Description | Type | Default | Example |
|---|---|---|---|---|---|
| authorizationToken * | Token | The token to access your bot on Telegram. You you can obtain it from the Telegram @botfather. | string |
Fields marked with an asterisk (*) are mandatory.
57.2. Dependencies
At runtime, the telegram-source Kamelet relies upon the presence of the following dependencies:
- camel:jackson
- camel:kamelet
- camel:telegram
- camel:core
57.3. Usage
This section describes how you can use the telegram-source.
57.3.1. Knative Source
You can use the telegram-source Kamelet as a Knative source by binding it to a Knative object.
telegram-source-binding.yaml
apiVersion: camel.apache.org/v1alpha1
kind: KameletBinding
metadata:
name: telegram-source-binding
spec:
source:
ref:
kind: Kamelet
apiVersion: camel.apache.org/v1alpha1
name: telegram-source
properties:
authorizationToken: "The Token"
sink:
ref:
kind: Channel
apiVersion: messaging.knative.dev/v1
name: mychannel
57.3.1.1. Prerequisite
Make sure you have "Red Hat Integration - Camel K" installed into the OpenShift cluster you’re connected to.
57.3.1.2. Procedure for using the cluster CLI
-
Save the
telegram-source-binding.yamlfile to your local drive, and then edit it as needed for your configuration. Run the source by using the following command:
oc apply -f telegram-source-binding.yaml
57.3.1.3. Procedure for using the Kamel CLI
Configure and run the source by using the following command:
kamel bind telegram-source -p "source.authorizationToken=The Token" channel:mychannel
This command creates the KameletBinding in the current namespace on the cluster.
57.3.2. Kafka Source
You can use the telegram-source Kamelet as a Kafka source by binding it to a Kafka topic.
telegram-source-binding.yaml
apiVersion: camel.apache.org/v1alpha1
kind: KameletBinding
metadata:
name: telegram-source-binding
spec:
source:
ref:
kind: Kamelet
apiVersion: camel.apache.org/v1alpha1
name: telegram-source
properties:
authorizationToken: "The Token"
sink:
ref:
kind: KafkaTopic
apiVersion: kafka.strimzi.io/v1beta1
name: my-topic
57.3.2.1. 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.
57.3.2.2. Procedure for using the cluster CLI
-
Save the
telegram-source-binding.yamlfile to your local drive, and then edit it as needed for your configuration. Run the source by using the following command:
oc apply -f telegram-source-binding.yaml
57.3.2.3. Procedure for using the Kamel CLI
Configure and run the source by using the following command:
kamel bind telegram-source -p "source.authorizationToken=The Token" kafka.strimzi.io/v1beta1:KafkaTopic:my-topic
This command creates the KameletBinding in the current namespace on the cluster.
