Deploy Java Telegram Bot on Heroku Server

3 min readJun 22, 2022

Today we are going to step through all the important elements in deploying the bot on heroku servers.

First and foremost, we need a telegram bot. Let’s use the simple echoBot example.

Creating a new project.

Setting maven library and adding telegrambots library.

Bot Library

<dependency>
    <groupId>org.telegram</groupId>
    <artifactId>telegrambots</artifactId>
    <version>6.0.1</version>
</dependency>

Main class

public class Main {
    public static void main(String[] args) {
        try {
            TelegramBotsApi telegramBotsApi = new TelegramBotsApi(DefaultBotSession.class);
            telegramBotsApi.registerBot(new Bot());
        } catch (TelegramApiException e) {
            throw new RuntimeException(e);
      }

    }
}

Bot class

To get a botToken you need to go to botFather and take a unique token for your new bot.public class Bot extends TelegramLongPollingBot {
    @Override
    public String getBotUsername() { return "@prayt_bot";}
    @Override
    public String getBotToken() {return "5355244356:AAGrTnB72LFlyxqA-4ncij3ZiKj3BA2a5a0";}

    @Override
    public void onUpdateReceived(Update update) {
        User user = update.getMessage().getFrom();
        if (update.hasMessage()){
            Message message = update.getMessage();
            if(message.hasText()){
                SendMessage sendMessage = new SendMessage();
                sendMessage.setText(update.getMessage().getText());
                    try {
                        execute(sendMessage);
                    } catch (TelegramApiException e) {
                        e.printStackTrace();
                }
            }
        }
    }
}

Now that we have a bot which is running locally, let’s go to heroku.com

Register at heroku

This will be the window of your heroku settings. For now leave it like this.

Open your pom.xml file from your java bot project, after dependencies tag. Enter the below code.

<build>
    <plugins>
       <plugin>
            <groupId>org.codehaus.mojo</groupId>
            <artifactId>appassembler-maven-plugin</artifactId>
            <version>1.1.1</version>
            <configuration>
                <assembleDirectory>target</assembleDirectory>
                <programs>
                    <program>
                        <mainClass>com.home.server.TelegramBot</mainClass>
                        <name>workerBot</name>
                    </program>
                </programs>
            </configuration>
            <executions>
                <execution>
                    <phase>package</phase>
                    <goals>
                        <goal>assemble</goal>
                    </goals>
                </execution>
            </executions>
        </plugin>
    </plugins>
</build>

Then, specify the exact path of your Main class.

Note that what you wrote in groupId is also the beginning of your project path.

If everything went well.

Get Isakovinc’s stories in your inbox

Join Medium for free to get updates from this writer.

Remember me for faster sign in

In the main project path create a file called:

“Procfile” inside it.
Write down → [ worker: sh target/bin/workerBot ]

Open your terminal (Windows powershell, gitBash)
Go to your project path
Run these commands:

1. git init

2. heroku login [login / password]

If you previously entered to your heroku account you dont need to enter anything. Simply press log in and close browser. Then in the terminal it will automatically enter to your heroku account.

3. git add .

4. git commit -m ‘Initial commit’

5. heroku create → get the name of the app | Here you will get the name of the app will look like this

Press enter or click to view image in full size