Deploy LINE Bot Java Examples on Render

This repo can be used to deploy Java examples in the line-bot-sdk-java on Render. Render doesn't natively support Java. A Dockerfile with Gradle and JDK image is used to deploy the Java samples.

Prerequisites

Make sure you have the following:

• A dedicated Messaging API channel for your bot.
• A Render account that doesn't require credit card to sign up.

Deployment

1. Fork this repo.

   Besides git clone to clone this repo, you also need to execute git submodule update --init to clone the line-bot-sdk-java submodule.

2. Update render.yaml to comment/uncomment the value of the SAMPLE_FOLDER environment variable to specify which LINE bot examples you want to deploy.

3. Cieck to deploy

   

4. You will be prompted to input LINE channel secret and access token. You can find them on the LINE Developers Console. Channel secret is on the channel's Basic settings tab. Channel access token is on the channel's Messaging API tab.

5. Once the bot servcie is live, find the service onrender URL (e.g., https://line-bot-java-<something unique>.onrender.com) on the Dashboard. Append /callback to the service URL to build the webhook URL (e.g., https://line-bot-java-<something unique>.onrender.com/callback). Paste the webhook URL to the Webhook settings section on the LINE channel's Messaging API tab on the LINE Developers Console. Also enable Use webhook on the same section.

6. Add the LINE Official Account associated with your bot as a friend on LINE by scanning the QR code on the Messaging API tab of your channel settings on the LINE Developers Console.

7. That's it. Send your LINE Official Account a text message on LINE and confirm that it responds with the same message.

Notes

• The build.gradle in the line-bot-sdk-java uses the maven plugin which has been deprecated in Gradle 7.0. The Gradle in the Dockerfile is 6.x.