How to build a Java based application on Heroku using Redis

Ajeet Raina
Ajeet Raina, Former Developer Growth Manager at Redis

Step 1. Create Redis Cloud#

Create your free Redis Cloud account. Follow this link to create Redis Cloud subscription and database as shown below:

Save the database endpoint URL and password for future reference.

Step 2. Create a Heroku account#

If you are using Heroku for the first time, create your new Heroku account through this link

Step 3. Install Heroku CLI on your system#

 brew install heroku

Step 4. Login to Heroku#

 heroku login
 heroku: Press any key to open up the browser to login or q to exit:
 Opening browser to https://cli-auth.heroku.com/auth/cli/browser/XXXXXXXXXXA
 Logging in... done
 Logged in as your_email_address

Step 5. Connect your application to Redis Cloud#

For this demonstration, we will be using a Sample Rate Limiting application

Clone the repository#

 git clone https://github.com/redis-developer/basic-rate-limiting-demo-java
heroku create
Creating app... done, ⬢ hidden-woodland-03996
https://hidden-woodland-03996.herokuapp.com/ | https://git.heroku.com/hidden-woodland-03996.git

Step 6. Setting up environment variables#

Go to Heroku dashboard, click "Settings" and set REDIS_ENDPOINT_URI and REDIS_PASSWORD under the Config Vars. Refer to Step 1 for reference.

You now have a functioning Git repository that contains a simple application as well as a package.json file, which is used by Node’s dependency manager.

Step 7. Deploy your code#

Heroku generates a random name (in this case hidden-woodland-03996) for your app, or you can pass a parameter to specify your own app name. Now deploy your code:

$ git push heroku
remote:        BUILD SUCCESSFUL in 1m 5s
remote:        12 actionable tasks: 12 executed
remote: -----> Discovering process types
remote:        Procfile declares types -> web
remote: -----> Compressing...
remote:        Done: 298.9M
remote: -----> Launching...
remote:        Released v3
remote:        https://hidden-woodland-03996.herokuapp.com/ deployed to Heroku
remote: Verifying deploy... done.
To https://git.heroku.com/hidden-woodland-03996.git
 * [new branch]      master -> master

Step 8. Accessing the application#

Open https://hidden-woodland-03996.herokuapp.com/ to see your application