Telegram Sink

Provided by: "Apache Software Foundation"

Support Level for this Kamelet is: "Stable"

Send a message to a Telegram chat by using your Telegram bot as sender.

To create a bot, use your Telegram app to contact the @botfather account.

This sink supports the following message types:

Standard text messages
PNG images (Content-Type must be set to image/png)
JPEG images (Content-Type must be set to image/jpeg)

This sink also supports the following message headers:

text / ce-text: when sending an image, the image caption
chat-id / ce-chatid: overrides the default chat where messages are sent to

Configuration Options

The following table summarizes the configuration options available for the telegram-sink Kamelet:

Property Name Description Type Default Example

Property	Name	Description	Type	Default	Example
authorizationToken	Token	Required The token to access your bot on Telegram. You you can obtain it from the Telegram @botfather.	string
chatId	Chat ID	The Chat ID to where you want to send messages by default. Whilst the Chat ID is not a required Configuration Option it must be provided for every message; either as a Configuration Option or a `chat-id` / `ce-chatid` header.	string

authorizationToken

Token

Required The token to access your bot on Telegram. You you can obtain it from the Telegram @botfather.

string

chatId

Chat ID

The Chat ID to where you want to send messages by default.

Whilst the Chat ID is not a required Configuration Option it must be provided for every message; either as a Configuration Option or a chat-id / ce-chatid header.

string

Dependencies

At runtime, the telegram-sink Kamelet relies upon the presence of the following dependencies:

camel:core
camel:jackson
camel:kamelet
camel:telegram

Camel JBang usage

Prerequisites

You’ve installed JBang.
You have executed the following command:

jbang app install camel@apache/camel

Supposing 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.yaml

Camel K Environment Usage

This section describes how you can use the telegram-sink.

Knative sink

You can use the telegram-sink Kamelet as a Knative sink by binding it to a Knative object.

telegram-sink-binding.yaml

apiVersion: camel.apache.org/v1
kind: KameletBinding
metadata:
  name: telegram-sink-binding
spec:
  source:
    ref:
      kind: Channel
      apiVersion: messaging.knative.dev/v1
      name: mychannel
  sink:
    ref:
      kind: Kamelet
      apiVersion: camel.apache.org/v1
      name: telegram-sink
    properties:
      authorizationToken: The Token

Prerequisite

You have Camel K installed on the cluster.

Procedure for using the cluster CLI

Save the telegram-sink-binding.yaml file to your local drive, and then edit it as needed for your configuration.
Run the sink by using the following command:
```
kubectl apply -f telegram-sink-binding.yaml
```

Procedure for using the Kamel CLI

Configure and run the sink by using the following command:

kamel bind channel:mychannel -p "sink.authorizationToken=The Token" telegram-sink

This command creates the KameletBinding in the current namespace on the cluster.

Kafka sink

You can use the telegram-sink Kamelet as a Kafka sink by binding it to a Kafka topic.