Rod Johnson in the cloud – the server side java symposium

Rod Johnson led off with a Dilbert cartoon about the cloud/platform – the pointy haired boss says “it’s like you are a technologist and philosopher all in one” in response to “blah blah blah cloud”.

Benefits of cloud

  • No reason to operate own data center because does not scale. Also noted the environmental impacts due to overprovisioning on small/medium data centers. Large companies will adopt onsite/internal clouds.
  • Compared computing to a utility and noted factories used to operate their own electricity. Really good analogy!

Perceived weakness for Java in the cloud

  • Perceived to be slow and startups look to Ruby and the like. This is a problem because these are the companies that are tomorrow’s leaders
  • Universal hosting not available like PHP

Strengths of Java in the cloud

  • Write once run anywhere
  • Java already in the enterprise
  • In actuality scales better than Ruby

Other Points

  • We think if the internet as free when we use it. However, there is a cost and the energy use is very high.
  • Rod Johnson considers flexibility to be a more important driver than cost. That way pay when need and not guessing up front if a startup will succeed. Compared to the Zipcar model. It costs more per mile but cheaper if don’t drive a lot. Another great analogy.
  • Simplicity, because large organizations have a lot of bureaucracy and provides a way to subvert that bureaucracy [some of that bureaucracy has a reason, accounting and security teams are not going to be happy with subverting things. However, an internal cloud provides benefits without subverting.]
  • Need architectural trade offs for economies of scale
  • If cloud is about business agility, need to be able apps fast which is why Rails shines. Notes the importance of being perceived as being able to start fast. [sounds like this is more valuable than maintenance]
  • It is more important to have one good option than a lot of medium options. Thinks Java community needs a cultural change to pick a stack. Showed how having two IDES of eclipse and intelij means good products and not a lot of poor choices. Interesting NetBeans was left off the list. rails helps because gives you less choices and saves time by encouraging consistency
  • The line between development and operations is blurring. No common tool chain organizational chaos. More self service in cloud because developers deploy

Spring’s thoughts

  • IaaS (infrastructure as a service) – vmware vcloud
  • PaaS (software as a service) – must abstract away OS, provide self service and be a productive programming model
  • Frameworks are key to portability – gave example that Spring isolates you from the app server [in other words if you deploy your container in your application, you don’t have to worry about the external container as much]. I liked the Ruby example better because Rails is. Framework that doesn’t replace the container.
  • Challenges: a lot more and complex data, adapt to RDBMS + NOSQL. Recognize what datastores need to be transactional. plugged Spring data project. Similarly for asynchronous data patterns
  • Visual builders are usually horrible because build uneditable code. Wavemaker is different because Spring owns it. I think there as another reason he tried to state but i didn’t catch it. Maybe it builds on roo?

Java’s phases

  • -2005 : make java work
  • 2005-2010: RIA, REST, higher productivity
  • 2010-?: beyond RDBMS, mobile/tablet, cloud, even higher productivity required

the end was all blatant advertising of spring’s tools.

Live from TSSJS – Web Frameworks with Matt

Live blogging from TheServerSide Java Symposium again, this time with Matt Raible, who is giving a presentation entitled “Comparing JVM Web Frameworks”.  He began his talk taking feedback from the audience on what frameworks people are using, with one humerous dialogue that proceeded as follows:

“How many people are using Struts 1?”.
One gentleman raises his hand.
“Poor bastard.  Are you using Struts with WebSphere?”
The gentleman nodded.
“Why haven’t you quit your job yet?”

1.  Web Frameworks – Too many?
In the non-Java market, jQuery has risen to the top but this hasn’t happened in the Java world.  Some people have criticized Java as having too many frameworks to choose from.

Matt is personally very much against Struts 1, as well as JSF.  He talks about how the founder of both, Craig McClanahan has essentially ditched Struts/JSF for Rails in around 2007.  He also quotes James Gosling as saying he hates JSF with a link to the YouTube video, although indicates he may have been referring to JSP.

2. Choosing a framework
Matt often talks about being asked which framework to use.  He has constructed a list of 20 criteria to determine which framework to use such as:

  1. Developer Productivity
  2. Developer Perception
  3. Learning Curve – Should be able to learn in under a week
  4. Project Health
  5. Developer Availability – Will you be able to find developers to hire who know the material?
  6. Job Trends
  7. Templating
  8. Components
  9. Ajax
  10. Plugins or Add-Ons
  11. Scalability
  12. Testing Support
  13. i18n and testing
  14. Validation
  15. Multi-language Support
  16. Quality of Documentation/Tutorials
  17. Books Published
  18. REST Support (client and server)
  19. Mobile / iPhone Support
  20. Degree of Risk

Matt reviewed a number of platforms and posted the resulting matrix online.  The top 5 ones based on these scores are Grails, Tapestry, Lift, Spring, and Struts2.  Often the 5, 6, and 7 providers change every few months.

3.  Business Decisions
Often companies hire consultants to reinforce web framework decisions that they have already made.  A lot of companies have a proprietary web framework that can be successful for their product.

4.  Controversary
Matt has been criticized for his scoring by members of the community.  He has posted a detailed explanation of how he calculated these ratings online.  As a well-read GWT developer, I disagree with some of his scores for GWT, especially templating which only scored a 0.5.

5. Matt’s favorite web frameworks

  1. Grails and Groovy:  Eeasy transition for Java developers.  It is also a gateway to Groovy.  He mentions some companies and developers resist Groovy because it is targeted only for Java developers and there isn’t a high availability of jobs.
  2. GWT:Great for Java developers who hate JavaScript.  The community is open and Google has done a good job growing a vibrant developer base.  The down sides, though, are that it is slow to test and requires Java knowledge to use.
  3. Ruby on Rails: Good for web developers, rather than hard-core Java developers.  The community is excellent.  The down sides is performance, testing, and type safety are limited.
  4. Spring MVC:  Easy configuration and usage
  5. VAADIN:  Excellent theme and layout support.  Uses the GWT API for developing view.
  6. WICKET:  Great for Java Developers.  Active community with creators providing a lot of support.  One downside is very little jobs available for WICKET developers.

Active Mailing Lists
One good measure of the health of a web framework is the number of developers asking questions and involved in the community, such as mailing lists and forum websites.  Some frameworks have hundreds of questions posted a month while others have 1-2 and are clearly not being used much.

Matt finished asking the question “What if there is no ‘best’ web framework?”, to which he spent time presenting competing argument about how people ‘shop’ for frameworks.  He compared shopping for frameworks with shopping for food and discussed an article with a researcher who did trending for how people choose food products.  “When we pursue universal principles in food, aka web services, we are doing ourselves a massive disservice”.  In other words, pick the frameworks that work for you, not neccesssarily the “best” framework.

Matt gave one of the best presentations I’ve attended at TheServerSide Java Symposium, and covered a large variety of web frameworks, while demonstrating expertise in each.  As a fellow consultant, I appreciate that he emphasized how quickly it is to pick up these frameworks as well as how easy it is to find a job with these skills.  At one point, he was one of only 3 active GWT developers in the Denver area and would get a call anytime there was a GWT job available.

Side note:  Matt recommends all Java developers learn about and know JRebel given its power, saying if you take away only one thing from this presentation it is that you should know JRebel.