Skip to main content

Looking for a web framework ...

I recently attended the Rich Web Applications course given by Spring Source, and I was surprised that the technology stack employed in the course was "equivalent" to what I used 8 years ago!

It's equivalent in the sense that:

  • Struts 1.2 was then the framework for implementing the Front Controller pattern
  • Tiles with JSPs and JSTL was the view mechanism
The course used Spring MVC which is the MODERN equivalent of Struts. Spring MVC is much more powerful but the functionality it provides is about the same as Struts.
The element that really surprised me was the fact that Tiles was the proposed mechanism for the view layer. I personally find Tiles to be powerful but given the elapsed time, I was expecting something new to replace it.

Why Tiles may not be so appropriate these days?
  1. It relies on JSPs which are not trivial to test outside a web container.
  2. The tiles XML where definitions go, is very similar to a Spring beans file. Nowadays you could expect a namespace for tiles within a spring config, rather than a standalone XML.
  3. Tiles require a mini framework on top to be effective. For instance if your tile requires some java script to be downloaded in the HTML head section, you need to put in place something yourself to deal with this situation, unlike the @Require instruction in the google sitebricks project .
  4. No clear separation between HTML design and scripting. See paper on the necessity of separation between view and model
These days where where we are supposed to produce a decent UI (i.e. possibility of auto-complete, selecting a date on a calendar, affecting the default value of another calendar on the same form) in a quick way, Tiles will not be the answer. I will be looking around at what is available.

Comments

Popular posts from this blog

LDAP server with your schema on your laptop

To choose is to live... Jacques Brel said "choisir c'est perdre": to choose is to loose. There would indeed be no choice to make if an option was definitely superior to the others. If you choose you will have to balance pros and cons and you will then have to loose. My great colleague, Achilleas Voutsas , reacted on less than a split second on that one. He straight away answered that: "To choose is to LIVE". He is right: if you have no choice, it is monotone. Choice is creativity. Choice is life. Going back to the theme. In 2005 Romain Eude and Gonzague Huet devised a solution allowing one to run an OpenLDAP server on a windows PC. That was brilliant and it helped tremendously the development of an LDAP based system. I could run an entire system on my laptop: database, application sever and OpenLDAP with 20000 entries. If you run Linux, OpenLDAP is no brainer choice to use. On Windows, the setup from that we used in 2005 is very easy but was not

Websites about using JPA 2.0 with Google app engine

Maven archetype to generate project (found by googling maven jpa 2 google app engine Archetype ): http://webapplicationdeveloper.blogspot.co.uk/2012/07/google-datastore-with-jpa-and-spring.html For Maven and Google App Engine, see also: http://code.google.com/p/maven-gae-plugin/ Google App engine documentation about JPA 2 support: https://developers.google.com/appengine/docs/java/datastore/jpa/overview-dn2 Google App engine documentation about the java datastore: https://developers.google.com/appengine/docs/java/gettingstarted/usingdatastore Another cool article but not to JPA or google app engine: https://code.google.com/p/guava-libraries/wiki/CachesExplained  

Recursivity and Observables: yes it is possible

When writing a loop using a paging API to fetch data for an Angular app, I felt so frustrated  that I was very close to going back to Promises. I came across lot of questions on the web but no convincing answers: some even proposing to subscribe to an Observable within the service implementation. However, I did not abandon  Observables to return using Promises thanks to this very informative comparison . From there I picked an  excellent article on reactive programming  with RxJava which gave me hope. So I kept on trying... Achieving both reactivity and recursivity without understanding the fundamentals of RxJs operators, was a struggle. After focussing on the use of the map and mergeMap operators, I managed a first implementation very similar to how I would write a solution to the same problem using Promises. To help me and others who have the same questions, I created a repository of angular code snippets . One is about  RxJs Recursive Observable . Expand operator to the