There are many benefits to schema-less NoSQL datastores, but there are always trade-offs. The primary gift the NoSQL movement has given us is the variety of options we now have for data persistence. With NoSQL we no longer must try to shoehorn everything into a relational model. Now the challenge is in deciding which persistence model fits best with each domain in a system and then combining those models in a cohesive way. The general term to describe this is [Polyglot Persistence][1] and there are many ways to accomplish it. Lets walk through how you can combine a regular SQL model with a key-value NoSQL model using Java, Spring, Hibernate, and PostgreSQL.

Next week I’ll be in Chicago and New York for a few presentation about Heroku, Play Framework, and running Java apps on the cloud.

• October 16 at the Chicago JUG: Java, Play! and Scala Apps on Heroku
• October 17 at the Chicago Heroku User Group: Hands-on Heroku - Deploying Apps on the Cloud
• October 18 at the NYJavaSig: Client/Server Apps with Play2 Framework, HTML5 and Java
• October 19 at the NYJavaSig: NYJavaSIG Cloud/HPC - Hands-on with Java on Heroku

Hope to see you there!

UPDATE: There have been some updates to my Revel Heroku Buildpack that make it work better and with newer versions of Revel. Check out the details.

Revel is a Play-like web framework for Go. I’m new to the Go programming language but I’ve heard good things. So I thought I’d take Revel for a spin and get it working on Heroku. Luckily there is already a Go Buildpack and a great article on how to use it.

This year at JavaOne I’ll be presenting two session and participating in one BOF:

BOF4149 - Web Framework Smackdown 2012 - Monday @ 8:30pm

Much has changed since the first Web framework smackdown, at JavaOne 2005. Or has it? The 2012 edition of this popular panel discussion surveys the current landscape of Web UI frameworks for the Java platform. The 2005 edition featured JSF, Webwork, Struts, Tapestry, and Wicket. The 2012 edition features representatives of the current crop of frameworks, with a special emphasis on frameworks that leverage HTML5 and thin-server architecture. Java Champion Markus Eisele leads the lively discussion with panelists James Ward (Play), Graeme Rocher (Grails), Edward Burns (JSF) and Santiago Pericasgeertsen (Avatar).

Tomorrow I’ll be presenting Practicing Continuous Delivery on the Cloud at the Atlanta No Fluff Just Stuff conference. Here is the session description:

This session will teach you best practices and patterns for doing Continuous Delivery / Continuous Deployment in Cloud environments. You will learn how to handle schema migrations, maintain dev/prod parity, manage configuration and scaling. This session will use Heroku as an example platform but the patterns could be implemented anywhere.

JavaZone 2012 was an awesome conference (as usual)! The video of my presentation about Running Java, Play! and Scala in the Cloud is now available. Check it out and let me know what you think. Thanks!

I’m really looking forward to being back at JavaZone in Oslo this September! I’ll be speaking about Running Java, Play! and Scala Apps on the Cloud. This session will teach you how to get started deploying Java and Scala apps on Heroku. I’ll be around for the whole conference, so if anyone wants to grab a drink, deploy some apps, or write some code with me, then let me know. See you there!

Dreamforce 2012 is going to be a fantastic event! And not just because Red Hot Chili Peppers, Colin Powell, and Richard Branson will be there. I’ll also be there talking about Building Java Apps on Heroku and Force.com. Here is the description for my session:

In this session you will learn how to build Social Enterprise applications using Salesforce, Heroku, and Java. Through live coding and demonstrations you will learn how to instantly deploy and scale Java apps on the cloud with Heroku. You will also learn how to integrate those applications with Salesforce and Force.com through REST.

Last week I introduced the Den of Clojure to Heroku. I really enjoyed learning more about Clojure and experiencing super simple Clojure deployment on Heroku. For those who haven’t yet deployed Clojure on Heroku, lets walk through 8 quick steps to get you started:

1. Install the Heroku Toolbelt and Leiningen
2. Login to Heroku from the command line: ```bash heroku login

    
    If this is your first time logging into Heroku from the command line then you will be led through some steps to associate an SSH key with your Heroku account.</li> 
    
      * Create a new Leiningen build definition by creating a file named **project.clj** containing: ```clojure
(defproject hello-clojure-noir "0.1.0-SNAPSHOT"
  :main web
  :dependencies [[org.clojure/clojure "1.4.0"]
                 [noir "1.2.1"]])

    As you can see from the dependencies, this simple app uses the [Noir web framework][4].</li> 
    
      * Create a simple Noir app by creating a file named **src/web.clj** containing: ```clojure

(ns web (:use noir.core) (:require [noir.server :as server]))

Many of the new JVM-based web frameworks are ditching containers and WAR files and instead using a WAR-less / Containerless approach. But that doesn’t mean you have to ditch your favorite Java web framework. A while back I posted about going containerless with Tapestry. Now lets do the same with Spring MVC. You can grab the full source code from GitHub.

First we need a build that defines the dependencies. Here is the build.gradle file for my Gradle build: