Deploying Java and Play! Apps on Heroku Sandeep Bhanot @cloudysan
May 15, 2015
Deploying Java and Play!
Apps on Heroku
Sandeep Bhanot
@cloudysan
Proprietary & Confidential
Safe Harbor Safe harbor statement under the Private Securities Litigation Reform Act of 1995:
This presentation may contain forward-looking statements that involve risks, uncertainties, and assumptions. If any such
uncertainties materialize or if any of the assumptions proves incorrect, the results of salesforce.com, inc. could differ
materially from the results expressed or implied by the forward-looking statements we make. All statements other than
statements of historical fact could be deemed forward-looking, including any projections of product or service availability,
subscriber growth, earnings, revenues, or other financial items and any statements regarding strategies or plans of
management for future operations, statements of belief, any statements concerning new, planned, or upgraded services
or technology developments and customer contracts or use of our services.
The risks and uncertainties referred to above include – but are not limited to – risks associated with developing and
delivering new functionality for our service, new products and services, our new business model, our past operating
losses, possible fluctuations in our operating results and rate of growth, interruptions or delays in our Web hosting,
breach of our security measures, the outcome of intellectual property and other litigation, risks associated with possible
mergers and acquisitions, the immature market in which we operate, our relatively limited operating history, our ability to
expand, retain, and motivate our employees and manage our growth, new releases of our service and successful
customer deployment, our limited history reselling non-salesforce.com products, and utilization and selling to larger
enterprise customers. Further information on potential factors that could affect the financial results of salesforce.com, inc.
is included in our annual report on Form 10-Q for the most recent fiscal quarter ended April 30, 2011. This documents
and others containing important disclosures are available on the SEC Filings section of the Investor Information section of
our Web site.
Any unreleased services or features referenced in this or other presentations, press releases or public statements are not
currently available and may not be delivered on time or at all. Customers who purchase our services should make the
purchase decisions based upon features that are currently available. Salesforce.com, inc. assumes no obligation and
does not intend to update these forward-looking statements.
Once upon a time….
Tim wanted to develop a Java app……
So he got to work….
• Acquire and provision all the H/W (Servers, Load Balancers, Routers etc.)
• Install, configure and tune the entire S/W stack (OS, Web/App Server, DB etc.)
• Configure env. for Application services like Routing, Clustering, Load Balancing,
• Patch and upgrade the H/W and S/W stack
Cost
DR, Caching, DB Replication etc ($$$)
Agility
One day….
Tim decided to try this ‘Cloud’ thingy……
So he tried an IAAS provider…. • NO H/W to buy/install/configure!
• Still has to configure and tune the entire S/W stack (OS, Web/App Server, DB etc.)
• Still has to configure (and sometime code) env. for Application services like
• Patch and upgrade the S/W stack
Scaling, Routing, Clustering, Load Balancing, DR, DB replication etc
Cost
Agility
Finally….
Tim heard of Heroku
When Tim met Heroku…. • NO Servers
• Managed S/W stack (OS, Web/App Server, DB etc.)
• Application services like Routing, Load Balancing and DR built-in
• Elastic scaling
• git push heroku master
Focus on your Code. Period.
Cost
Agility
Heroku = Polyglot Cloud Platform
402,550+ Apps Running on Heroku
$ heroku create –s cedar
$ git push heroku master
Create more web processes:
$ heroku scale web=2
What processes are running:
$ heroku ps
Check the logs:
$ heroku logs
View releases:
$ heroku releases
Rollback:
$ heroku rollback
Run a process:
$ heroku run "your bash command"
Environment (Runtime, configuration, etc)
Ingredients (Dependencies, app, services, etc)
Process (Build, assemble, start, etc)
Environment + Ingredients + Process = web 1!
Environment + Ingredients + Process = web 2!
Deploying web apps...
$ heroku config
DATABASE_URL = postgres://blah:[email protected]/blah
JAVA_OPTS = -Xmx384m -Xss256k -XX:+UseCompressedOops
MAVEN_OPTS = -Xmx384m -Xss256k -XX:+UseCompressedOops
PATH = .maven/bin:/usr/local/bin:/usr/bin:/bin
REDISTOGO_URL = redis://redistogo:[email protected]:9291/
REPO = /app/.m2/repository
Externalize Environment Variables
Ingredients defined (pom.xml)
<dependency> <groupId>org.eclipse.jetty</groupId> <artifactId>jetty-webapp</artifactId> <version>${jetty.version}</version> </dependency> <dependency> <groupId>org.mortbay.jetty</groupId> <artifactId>jsp-2.1-glassfish</artifactId> <version>2.1.v20100127</version> </dependency> <dependency> <groupId>postgresql</groupId> <artifactId>postgresql</artifactId> <version>9.0-801.jdbc4</version> </dependency>
web: sh target/bin/webapp
Process defined (Maven + Procfile)
Don't Share-Something
Move state to the isolated & independent edges
- UI state -> client
- Permanent state -> external data stores
Share-Nothing
Deploy an app on Heroku
1. Create a Java Web App
2. Add a Procfile
3. Commit to a git repo
4. Create an app on Heroku
5. “git push” to Heroku
6. Scale and monitor on Heroku
Connect to a Database
• Free shared PostgreSQL DB
• Dedicated & managed PostgreSQL DB
• Amazon RDS MySQL & Oracle
• NoSQL Add-ons (Redis, MongoDB, etc)
• Database.com
• Or do your own thing
Heroku: postgres://[username]:[password]@[server]/[db-name]
JDBC: jdbc:postgresql://[server]/[db-name]?user=[username]&password=[password]
Transform: dbUrl = dbUrl.replaceAll("postgres://(.*):(.*)@(.*)",
"jdbc:postgresql://$3?user=$1&password=$2");
Transform DATABASE_URL
Create a Worker Process
1. Create a process
2. Update the Procfile
3. Push to Heroku
4. Scale the workers
Using a Heroku Add-on
• Find an Add-on: http://addons.heroku.com
• Activate the Add-on
• Use the service
• Push to Heroku
Play!
• A Java framework for Web Applications
• Non Servlet or JEE based
• A full stack framework
• Focuses on productivity and fun
Play! on Heroku
1. Create Play app
2. Add app to git repo
3. Create app on Heroku
4. Push app to Heroku
750 free dyno hours
per month per app
heroku.com/java
github.com/heroku/java-workbook
@cloudysan