This demo shows how easy is to create a chat bot for Telegram using Camel K.

You need:

• A Kubernetes or Openshift cluster (also a local dev cluster) with Camel K installed in the current namespace. You can follow the instructions in the Camel K repo to install it on a development cluster (Minishift or Minikube) or on a real cluster.
• The kamel CLI client tool.
• Your preferred IDE, with support for Maven. It's needed for code-completion. If you have IntelliJ Idea, Eclipse or VS Code, you'll find a Camel plugin that provides better support for Camel routes.

You need to create a Bot on Telegram. The Camel K integration code will impersonate the bot.

Just follow the instructions on the Telegram website to create a new bot. Usually the quickest way to do it is to contact directly another Telegram bot that is called @botfather from you Telegram client App.

After you create the bot, you'll be given an authorization token that is needed to impersonate the bot.

Check that you're connected to the cluster and that Camel K is installed correctly.

kubectl get integrationplatform camel-k -o=jsonpath='{.status.phase}'

If the result of the previous command is Ready, you're ready to go.

You can run the integration with the following command:

kamel run Routes.java -p token=<the-authorization-token-of-the-bot> -d camel-hystrix --dev

By using the --dev flag, you'll see the output of the pod printed in the console and the integration will be deleted when you press ctrl+c to exit. You can omit the flag if you just want to keep the integration running after you leave.

You can open your Telegram chat client and write a message to your bot (you've to write the full name of the bot. E.g. @mybotname for it to appear in the list of contactable users).

You can send messages to the bot. When you write the word "chuck" in one of your message, you'll get a famous quote about Chuck Norris.

E.g.

Chuck Norris doesn't need try-catch, exceptions are too afraid to raise.

NOTE: we're using a service provided by "The Internet Chuck Norris Database" and we're not responsible for the content it provides. Most of the times we get random funny sentences ;)