Chapter 68. 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 68.1. 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 Note Fields marked with an asterisk (*) are mandatory. 68.2. Dependencies At runtime, the telegram-source Kamelet relies upon the presence of the following dependencies: camel:jackson camel:kamelet camel:telegram camel:core 68.3. Usage This section describes how you can use the telegram-source . 68.3.1. 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 68.3.1.1. Prerequisite Make sure you have "Red Hat Integration - Camel K" installed into the OpenShift cluster you're connected to. 68.3.1.2. Procedure for using the cluster CLI Save the telegram-source-binding.yaml file 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 68.3.1.3. 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. 68.3.2. 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 68.3.2.1. 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. 68.3.2.2. Procedure for using the cluster CLI Save the telegram-source-binding.yaml file 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 68.3.2.3. 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. 68.4. Kamelet source file https://github.com/openshift-integration/kamelet-catalog/telegram-source.kamelet.yaml

Commands:
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
apply -f telegram-source-binding.yaml
kamel bind telegram-source -p "source.authorizationToken=The Token" channel:mychannel
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
apply -f telegram-source-binding.yaml
kamel bind telegram-source -p "source.authorizationToken=The Token" kafka.strimzi.io/v1beta1:KafkaTopic:my-topic