A cloud computing platform
Heroku is a “platform as a service” (PAAS) cloud-computing platform.
At least as of this writing (August 2018), Heroku has a free tier that we can use without needing a credit cardto try out Java applications (including web applications) in the cloud. This allows us to run Java web applications and make them available 24x7 on the public internet. Editplus for mac free download.
To get a Java webapp running on Heroku (e.g. a SparkJava web app), here’s the minimum you need to do: Can you download microsoft word onto a macbook air.
- You need a file called
Procfile
in the root of the github repo. It must be calledProcfile
, exactly. Notprocfile
, notprocfile.txt
, butProcfile
. - In the Procfile, you need the following:That
location-of-the-jar-file
will need to be replaced with the exact location of Jar file that has everythingin it needed for your application. Next, we need to describe how to create a suitable jar file with Maven.The jar file produced by the sparkjava-01 example is:target/sparkjava-demo-01-1.0-jar-with-dependencies.jar
So the Procfile should look like this:The name of the jar that is produced by this, when you runmvn package
might be different depending on other things that are in yourpom.xml
. Instead oftarget/sparkjava-demo-01-1.0-jar-with-dependencies.jar
, it may be something else. And it’s possibly, you won’t have a suitable .jar at all. Do the next step first, then domvn package
then look in thetarget
subdirectory for the jar. (Oh, and make sure thattarget
is in your.gitignore
.) - In your pom.xml, you need this. You will need to modify the part that says
mainClass
to be the exact package and class name of the file that has the main for your web app. What this does is to create an executable jar that has all the dependencies in it. For more details, see: https://www.baeldung.com/executable-jar-with-maven
- You may also need to modify the main of whatever example you are working with to be sure that it picks up the port number from Heroku correctly. The
sparkjava-01
example code does this. BUT, any particular example Sparkjava app that you happen to find on the web on a tutorial website might or might not have that code.
Push to heroku: git push-u heroku v1.5.x:master. Ensure that a proper SSH key was added to your account, otherwise the push will not succeed! Initialise a single dyno: heroku ps:scale web=1 Visit your app! If these instructions are unclear or if you run into trouble, please let us know by creating a topic on the Community Support Forum. The Heroku Toolbelt is a package of the Heroku CLI, Foreman, and Git — all the tools you need to get started using Heroku at the command line. The Toolbelt is available as a native installer for OS X, Windows, and Debian/Ubuntu Linux. The Toolbelt has been available since last fall as part of our polyglot platform. Mac OS X Base System Configuration Raw. Diffmerge textmate silverlight bbedit quicksilver heroku-toolbelt skitch evernote postgres. Heroku config:add HEROKUTOOLBELTAPP= -app heroku config:add HEROKUTOOLBELTAPIEMAIL=sss -app heroku config:add HEROKUTOOLBELTAPIPASSWORD=ddd -app Go to settings page of your Heroku application and add Config Var DBURLFORBACKUP with the same value as var DATABASEURL.
As an example, the tutorial from this repo http://sparkjava.com/tutorials/application-structure has a hard coded port:
That’s no good. Instead, you need this:
That relies on you implementing a static method called
getHerokuAssignedPort
yourself.Here’s the code:
- To get this working on Heroku, go to the Dashboard on Heroku and create a new Heroku app. Then, go to the Deploy tab, and link that app to your github repo. Finally, scroll down to where it says: Deploy Branch, and click to deploy from the Master Branch.
You should see a running log of the webapp starting up, and at the end, it should give you a button to open your web app. Or else, you’ll see an error message indicating what went wrong.
Good luck.
The “Heroku Toolbelt” is a command-line interface to Heroku that you can install on Windows, Mac or Linux.
As of this writing (08/27/2018), the Heroku toolbelt is also available on the CSIL machines and the machines in Phelps 3525 (CSTL).
- Use
heroku login
to login to your heroku account for your current CSIL shell session - Use the command
heroku
to list the available commands - Use
heroku logout
if you want to logout and login to a different heroku account.
There is a
plugin
for Maven to deploy Heroku apps.One note: it appears that you need to be logged into a Heroku account using the Heroku CLI on the machine where you are running Maven, or else this plugin will not work.
Here’s an example of the plugin configuration in the pom.xml to get this to work. It is adapated from this tutorial about using SparkJava with Heroku
Related topics:
- Heroku: Troubleshooting—Solutions to common problems and errors
Caveats
- You must have a heroku app deployed on the hobby tier. This is NOT the free tier and costs ~7/month
- i'm assuming you have homebrew installed. It will be need to install the Certbot client
- i'm also assuming you have the heroku CLI tools installed
first up, run this to install the certbot client
start the certbot script in manual mode
Enter the url(s) you want to create certificates for
--------- STOP! READ THIS!----------
*You need to complete a route validation (explained below) before continuing or else the script will fail and you'll need to start over.
The next step is to create a route for verification. You need to verify you're the owner of the server to get a certificate.The Certbot script will provide you a unique id that you will need to send in response to a request on the route '/.well-known/acme-challenge/:id' where :id is a random string Certbot will send.
![Toolbelt Toolbelt](/uploads/1/1/7/9/117937067/364979362.png)
you can see in the below route i'm responding with whatever is sent in the url request (:id) combind with my unique id provided by Certbot.
I'm using nodeJS so I created a route like this
After you created the route succesfully test and deploy to Heroku.
Once you've deployed to Heroku and the build is completed succesfully come back to the terminal window and press enter to contiue the Certbot script. You should see a success message.
Now you have the certs, SWEET!
Next, you'll need to deploy them to Heroku.
Heroku Toolbelt Download
Heroku has recently changed their policy on SSL support, below is a quote from their site.
Heroku Tool Belt Download Mac Os
'Heroku SSL is included for free on any app that uses paid dynos: Hobby, Standard-1X, Standard-2X, Performance-M and Performance-L. This service uses Server Name Indication (SNI), an extension of the TLS protocol, which allows for Heroku to terminate SSL on its router.'
heroku certs:add --app <YOUR_HEROKU_APP_NAME_HERE> /etc/letsencrypt/live/inchworm.io/fullchain.pem /etc/letsencrypt/live/inchworm.io/privkey.pem
After you enter this command using the heroku toolbelt, heroku will prompt you to change your dns records with the new nameservers they provide.
Once you change those records you're done!
If you're having any problems check out the heroku docs here.