Welcome!

Java Authors: Trevor Parsons, Rex Morrow, Datical, Elizabeth White, Peter Silva, Hovhannes Avoyan

Related Topics: Web 2.0, Java, Adobe Flex, Open Source, Eclipse, Ruby

Web 2.0: Article

Java Kicks Ruby on Rails in the Butt

This article demonstrates that Java is more productive than Ruby

This article tries to demonstrate that Java can be more productive than Ruby. We are going to develop the same application of the article Rolling with Ruby on Rails Revisited (part 1 [1] and part 2 [2]) but using POJO [3]s annotated with JPA [4] and a Model Driven Framework, OpenXava [5] in this case. The result is that with less code, and less time you obtain a more powerful application.

Ruby and rails: The regressive framework

Ruby on rails [6] is so elegant, so easy, so productive. I cannot avoid read and heard continuously these comments. For example, the article Rolling with Ruby on Rails Revisited of Bill Walton says:

What would you think if I told you that you can develop a web application at least ten times faster with Rails than you can with a typical Java framework?”

Oops! Ten times faster!

Well, after these comments I decided to learn Ruby on Rails. I need to know the true key of the productivity and programmer happiness.

After have a taste of RnR I found it a very classic framework, with old techniques:

  • Ruby is a dynamically typed [7] language, as Smalltalk [8]. I prefer statically typed [9] languages.

  • Scaffolding is passive code generation, as IDE wizards or AppFuse [10]. I prefer active code generation [11], or even better, no code generation at all.

  • Relational database centric: the code generators and ActiveRecord promote think first in tables after in classes. I prefer a more pure OO, as Hibernate [12], JPA [4] or even ODBMS [13].

  • MVC [14]: I'm looking for something newer and better that an old MVC framework.

The Java problem: Java developers

The productivity in Java world is a cultural problem, not a technical one. That is this is not a Java fault, it's our fault, we, the Java developers, need to design very beautiful architectures, to apply everywhere the GoF [15] patterns, to do everything reusable, to put 3 tiers in all our systems and to use web services [16] for all. We are not looking for simplicity, therefore we have not found it. But, Java is a very elegant language that allows simpler approach to software development.

Java productivity: The other way

A way for productivity is to use a Model Driven approach. That is, develop the model part, and only the model part, of our application, and to use a framework to produce all the application from it. MDA [17], OpenXava [5], Trails [18], NakedObjects [19], RomaFramework [20] and JMatter [21] are examples of this approach.

The goal

This is the main screen of the wanted application:

Basically, the app's supposed to do three things:

  • Display a list of all recipes.

  • Create new recipes and edit existing recipes.

  • Assign a recipe to a category (like "dessert" or "soup").

The Ruby on Rails first sprint

The first step using RnR is creating the new project, from command line you have to write:

$ rails cookbook2 

Now you must create and configure your database.

Then it's the time for writing your first code, in this case SQL code:

drop table if exists recipes;
drop table if exists categories;
create table categories (
id int not null auto_increment,
name varchar(100) not null default '',
primary key(id)
) engine=InnoDB;

create table recipes (
id int not null auto_increment,
category_id int not null,
title varchar(100) not null default '',
description varchar(255) null,
date date null,
instructions text null,
constraint fk_recipes_categories foreign key
(category_id) references categories(id),
primary key(id)
) engine=InnoDB;

Obviously you have to execute these sentences against your database.

And the final step is generate the Ruby code, you only need execute the next command in the shell of your O.S:

$ ruby script\generate scaffold recipe recipe
$ ruby script\generate scaffold category category

Yes. You have the very first version of your RnR application ready to run.

Yes, very little work, a simple “create table”, and executing a wizard. Let's see the result.

The Rails result

This is the resulting application:

New category entry page

New category added!

New recepy entry page

Little work. Little result.

The JPA on OX first sprint

Go on using OpenXava [5]. The first step using OpenXava is creating the new project:

$ ant CreateNewProject.xml -Dproject=CookBook 

Now you must create and configure your database.

Then it's the time for writing your first code, in this case Java code:

Recipe.java:

package org.openxava.cookbook.model;

import java.util.*;
import javax.persistence.*;
import org.openxava.annotations.*;

@Entity
@View(members="title; description; date; instructions")
public class Recipe {

@Id @GeneratedValue @Hidden
private Integer id;

@Required @Column(length=100)
private String title;

@Column(length=255)
private String description;

private Date date;

@Stereotype("HTML_TEXT")
private String instructions;

public Integer getId() {
return id;
}

public void setId(Integer id) {
this.id = id;
}

public String getTitle() {
return title;
}

public void setTitle(String title) {
this.title = title;
}

public String getDescription() {
return description;
}

public void setDescription(String description) {
this.description = description;
}

public Date getDate() {
return date;
}

public void setDate(Date date) {
this.date = date;
}

public String getInstructions() {
return instructions;
}

public void setInstructions(String instructions) {
this.instructions = instructions;
}

}

Category.java:

package org.openxava.cookbook.model;

import java.util.*;

import javax.persistence.*;

import org.openxava.annotations.*;

@Entity
public class Category {

@Id @GeneratedValue @Hidden
private Integer id;

@Required @Column(length=100)
private String name;

public Integer getId() {
return id;
}

public void setId(Integer id) {
this.id = id;
}

public String getName() {
return name;
}

public void setName(String name) {
this.name = name;
}

}

And the final step is to generate the dababase schema, you only need to execute the next ant target from your project:

$ ant updateSchema

Yes. You have the very first version of your OpenXava application ready to run.

Yes, very little work, a simple POJOs, and executing 'updateSchema'. Let's see the result.

The OpenXava result

This is the resulting application:

 List Mode

 Detail mode

Note that the user can create,update, delete, generate PDF from list, export the list to excel, order by each column, paging with support for large resultsets and filter data. Moreover you can deploy directly, with no code, only executing an ant target, your application in a JSR-168 [22] portal, and the look & feel of the OpenXava portlet adapts to the look & feel of the portal.

This is, from first time, an application ready for production.

Little work, polished result.

From a philosophical point of view the difference here between RnR and OX is that in RnR you write first the tables and in OpenXava you write first the classes.

The controllers

Rails has generated for you the controller logic for the basic CRUD, you can see it here:

RnR controller

In the other hand OX has not generated any code for CRUD, OpenXava just have a generic code for doing CRUD and Printing, and it is assigned automatically to all entities. You can write your own generic CRUD logic, or you can write a specific logic for a particular entity, but you haven't a controller code for each entity. In this way, you have less code to maintain, and you can change the logic of all CRUD modules touching in a single place.

That is for controllers Rails uses generated code while OX uses generic code.

You can learn more about OX controllers in OpenXava wiki [23].

Adding a relationship

For adding a relationship from category to recipe in Ruby you have to write the next code in category.rb:

Rnr relationship category to recipe

and this one in recipe.rb:

Rnr relationship recipe to category

Yes, pretty simple. But, you have more work to do. You must edit cookbook2\app\views\recipe\_form.rhtml and add the next code:

<p><label
for="recipe_category_id">Category</label><br/>
<%= select("recipe", "category_id", Category.find(:all).collect
{|c| [c.name, c.id] }) %></p>

The result is:

Rnr recipe with category

For its part, in OpenXava you have to define the relationship using JPA in Category.java:

@ManyToOne(optional=false) @DescriptionsList
private Category category;

and in Recipe.java:

 @OneToMany(mappedBy="category")
private Collection<Recipe> recipes;

And you do not need to touch any HTML-like code. You application will show just this:

OpenXava Recipe with Category

You have a link for modifying or creating new categories from here.

Without adding any additional code if the user go to the Category module he will obtain a collection of Recipes in each Category, as following:

OpenXava Category with recipes

In this point the RnR application still does not have this features, you need to write some Ruby and HTML to code to obtain the same effect.

The main difference here between RnR and OX here is that in OX you do not write any HTML-like code, indeed you do not write User Interface code at all.

Calculating a initial value

The next step in the Ruby on Rails tutorial is to generated a initial value for a property. In RnR you have to edit the controller code in order to achieve it. Let's see it:

You modify the new and update method adding the line:

@recipe.date = Time.now

The equivalent in OX is adding the @DefaultValueCalculator annotation in model:

@DefaultValueCalculator(CurrentDateCalculator.class)
private Date date;

You obtain the same effect in a more declarative way.

That, while in RnR you put the code on controller, in OX the code for calculating initial values, for validations and for business logic in general is on the model. OX promotes moving business logic from controller to model.

As curiosity, in the RnR article says: “I modified the model files so I need to restart our web server.” While using Eclipse WTP I only need to press Ctrl – B, and click on refresh in my browser in order to see the change of my model in my OpenXava application.

Conclusion

The main difference between Ruby on Rails and OpenXava is that RnR is a MVC framework, you have to write the model, the view and the controllers, and OX is a model-driven framework, you only need to write the model. The result is less code for a better application.

Another big difference is that RnR uses passive code generation; that is, it generates the code for you, but after it if you want to extend or refine the code you have to edit the generated code. OpenXava does not use code generation, the only code you have is the code you write.

You can find productivity inside the Java universe.

References

 

Links

[1] http://www.onlamp.com/pub/a/onlamp/2006/12/14/revisiting-ruby-on-rails-r...
[2] http://www.onlamp.com/pub/a/onlamp/2007/01/05/revisiting-ruby-on-rails-r...
[3] http://en.wikipedia.org/wiki/Plain_Old_Java_Object
[4] http://en.wikipedia.org/wiki/Java_Persistence_API
[5] http://www.openxava.org/
[6] http://www.rubyonrails.org/
[7] http://en.wikipedia.org/wiki/Dynamically_typed_language#Dynamic_typing
[8] http://en.wikipedia.org/wiki/Smalltalk
[9] http://en.wikipedia.org/wiki/Type_system#Static_typing
[10] http://en.wikipedia.org/wiki/AppFuse
[11] http://c2.com/cgi-bin/wiki?ActiveCodeGeneration
[12] http://www.hibernate.org
[13] http://en.wikipedia.org/wiki/ODBMS
[14] http://en.wikipedia.org/wiki/Model-view-controller
[15] http://en.wikipedia.org/wiki/Design_Patterns
[16] http://en.wikipedia.org/wiki/Web_services
[17] http://www.omg.org/mda/
[18] http://www.trailsframework.org/
[19] http://www.nakedobjects.org/
[20] http://romaframework.xwiki.org
[21] http://jmatter.org/
[22] http://jcp.org/en/jsr/detail?id=168
[23] http://openxava.wikispaces.com/controllers_en
[24] http://java.dzone.com/sites/all/files/rails-vs-ox010.jpg
[25] http://java.dzone.com/sites/all/files/rails-vs-ox020.jpg
[26] http://java.dzone.com/sites/all/files/rails-vs-ox030.jpg
[27] http://java.dzone.com/sites/all/files/rails-vs-ox040.jpg

More Stories By Javier Paniza

Javier Paniza is the project lead for OpenXava project. He works as software developer at Gestión 400, a software company for public administration in Spain. He has been developing with Java Enterprise since 1998. Also he has been J2EE mentor for development teams in banking projects.

@ThingsExpo Stories
Software AG helps organizations transform into Digital Enterprises, so they can differentiate from competitors and better engage customers, partners and employees. Using the Software AG Suite, companies can close the gap between business and IT to create digital systems of differentiation that drive front-line agility. We offer four on-ramps to the Digital Enterprise: alignment through collaborative process analysis; transformation through portfolio management; agility through process automation and integration; and visibility through intelligent business operations and big data.
There will be 50 billion Internet connected devices by 2020. Today, every manufacturer has a propriety protocol and an app. How do we securely integrate these "things" into our lives and businesses in a way that we can easily control and manage? Even better, how do we integrate these "things" so that they control and manage each other so our lives become more convenient or our businesses become more profitable and/or safe? We have heard that the best interface is no interface. In his session at Internet of @ThingsExpo, Chris Matthieu, Co-Founder & CTO at Octoblu, Inc., will discuss how these devices generate enough data to learn our behaviors and simplify/improve our lives. What if we could connect everything to everything? I'm not only talking about connecting things to things but also systems, cloud services, and people. Add in a little machine learning and artificial intelligence and now we have something interesting...
Last week, while in San Francisco, I used the Uber app and service four times. All four experiences were great, although one of the drivers stopped for 30 seconds and then left as I was walking up to the car. He must have realized I was a blogger. None the less, the next car was just a minute away and I suffered no pain. In this article, my colleague, Ved Sen, Global Head, Advisory Services Social, Mobile and Sensors at Cognizant shares his experiences and insights.
We are reaching the end of the beginning with WebRTC and real systems using this technology have begun to appear. One challenge that faces every WebRTC deployment (in some form or another) is identity management. For example, if you have an existing service – possibly built on a variety of different PaaS/SaaS offerings – and you want to add real-time communications you are faced with a challenge relating to user management, authentication, authorization, and validation. Service providers will want to use their existing identities, but these will have credentials already that are (hopefully) irreversibly encoded. In his session at Internet of @ThingsExpo, Peter Dunkley, Technical Director at Acision, will look at how this identity problem can be solved and discuss ways to use existing web identities for real-time communication.
Can call centers hang up the phones for good? Intuitive Solutions did. WebRTC enabled this contact center provider to eliminate antiquated telephony and desktop phone infrastructure with a pure web-based solution, allowing them to expand beyond brick-and-mortar confines to a home-based agent model. It also ensured scalability and better service for customers, including MUY! Companies, one of the country's largest franchise restaurant companies with 232 Pizza Hut locations. This is one example of WebRTC adoption today, but the potential is limitless when powered by IoT. Attendees will learn real-world benefits of WebRTC and explore future possibilities, as WebRTC and IoT intersect to improve customer service.
From telemedicine to smart cars, digital homes and industrial monitoring, the explosive growth of IoT has created exciting new business opportunities for real time calls and messaging. In his session at Internet of @ThingsExpo, Ivelin Ivanov, CEO and Co-Founder of Telestax, will share some of the new revenue sources that IoT created for Restcomm – the open source telephony platform from Telestax. Ivelin Ivanov is a technology entrepreneur who founded Mobicents, an Open Source VoIP Platform, to help create, deploy, and manage applications integrating voice, video and data. He is the co-founder of TeleStax, an Open Source Cloud Communications company that helps the shift from legacy IN/SS7 telco networks to IP-based cloud comms. An early investor in multiple start-ups, he still finds time to code for his companies and contribute to open source projects.
The Internet of Things (IoT) promises to create new business models as significant as those that were inspired by the Internet and the smartphone 20 and 10 years ago. What business, social and practical implications will this phenomenon bring? That's the subject of "Monetizing the Internet of Things: Perspectives from the Front Lines," an e-book released today and available free of charge from Aria Systems, the leading innovator in recurring revenue management.
The Internet of Things will put IT to its ultimate test by creating infinite new opportunities to digitize products and services, generate and analyze new data to improve customer satisfaction, and discover new ways to gain a competitive advantage across nearly every industry. In order to help corporate business units to capitalize on the rapidly evolving IoT opportunities, IT must stand up to a new set of challenges.
There’s Big Data, then there’s really Big Data from the Internet of Things. IoT is evolving to include many data possibilities like new types of event, log and network data. The volumes are enormous, generating tens of billions of logs per day, which raise data challenges. Early IoT deployments are relying heavily on both the cloud and managed service providers to navigate these challenges. In her session at 6th Big Data Expo®, Hannah Smalltree, Director at Treasure Data, to discuss how IoT, Big Data and deployments are processing massive data volumes from wearables, utilities and other machines.
All major researchers estimate there will be tens of billions devices – computers, smartphones, tablets, and sensors – connected to the Internet by 2020. This number will continue to grow at a rapid pace for the next several decades. With major technology companies and startups seriously embracing IoT strategies, now is the perfect time to attend @ThingsExpo in Silicon Valley. Learn what is going on, contribute to the discussions, and ensure that your enterprise is as "IoT-Ready" as it can be!
P2P RTC will impact the landscape of communications, shifting from traditional telephony style communications models to OTT (Over-The-Top) cloud assisted & PaaS (Platform as a Service) communication services. The P2P shift will impact many areas of our lives, from mobile communication, human interactive web services, RTC and telephony infrastructure, user federation, security and privacy implications, business costs, and scalability. In his session at Internet of @ThingsExpo, Erik Lagerway, Co-founder of Hookflash, will walk through the shifting landscape of traditional telephone and voice services to the modern P2P RTC era of OTT cloud assisted services.
While great strides have been made relative to the video aspects of remote collaboration, audio technology has basically stagnated. Typically all audio is mixed to a single monaural stream and emanates from a single point, such as a speakerphone or a speaker associated with a video monitor. This leads to confusion and lack of understanding among participants especially regarding who is actually speaking. Spatial teleconferencing introduces the concept of acoustic spatial separation between conference participants in three dimensional space. This has been shown to significantly improve comprehension and conference efficiency.
The Internet of Things is tied together with a thin strand that is known as time. Coincidentally, at the core of nearly all data analytics is a timestamp. When working with time series data there are a few core principles that everyone should consider, especially across datasets where time is the common boundary. In his session at Internet of @ThingsExpo, Jim Scott, Director of Enterprise Strategy & Architecture at MapR Technologies, will discuss single-value, geo-spatial, and log time series data. By focusing on enterprise applications and the data center, he will use OpenTSDB as an example to explain some of these concepts including when to use different storage models.
SYS-CON Events announced today that Gridstore™, the leader in software-defined storage (SDS) purpose-built for Windows Servers and Hyper-V, will exhibit at SYS-CON's 15th International Cloud Expo®, which will take place on November 4–6, 2014, at the Santa Clara Convention Center in Santa Clara, CA. Gridstore™ is the leader in software-defined storage purpose built for virtualization that is designed to accelerate applications in virtualized environments. Using its patented Server-Side Virtual Controller™ Technology (SVCT) to eliminate the I/O blender effect and accelerate applications Gridstore delivers vmOptimized™ Storage that self-optimizes to each application or VM across both virtual and physical environments. Leveraging a grid architecture, Gridstore delivers the first end-to-end storage QoS to ensure the most important App or VM performance is never compromised. The storage grid, that uses Gridstore’s performance optimized nodes or capacity optimized nodes, starts with as few a...
The Transparent Cloud-computing Consortium (abbreviation: T-Cloud Consortium) will conduct research activities into changes in the computing model as a result of collaboration between "device" and "cloud" and the creation of new value and markets through organic data processing High speed and high quality networks, and dramatic improvements in computer processing capabilities, have greatly changed the nature of applications and made the storing and processing of data on the network commonplace. These technological reforms have not only changed computers and smartphones, but are also changing the data processing model for all information devices. In particular, in the area known as M2M (Machine-To-Machine), there are great expectations that information with a new type of value can be produced using a variety of devices and sensors saving/sharing data via the network and through large-scale cloud-type data processing. This consortium believes that attaching a huge number of devic...
Innodisk is a service-driven provider of industrial embedded flash and DRAM storage products and technologies, with a focus on the enterprise, industrial, aerospace, and defense industries. Innodisk is dedicated to serving their customers and business partners. Quality is vitally important when it comes to industrial embedded flash and DRAM storage products. That’s why Innodisk manufactures all of their products in their own purpose-built memory production facility. In fact, they designed and built their production center to maximize manufacturing efficiency and guarantee the highest quality of our products.
Can call centers hang up the phones for good? Intuitive Solutions did. WebRTC enabled this contact center provider to eliminate antiquated telephony and desktop phone infrastructure with a pure web-based solution, allowing them to expand beyond brick-and-mortar confines to a home-based agent model. Download Slide Deck: ▸ Here
All major researchers estimate there will be tens of billions devices - computers, smartphones, tablets, and sensors - connected to the Internet by 2020. This number will continue to grow at a rapid pace for the next several decades. Over the summer Gartner released its much anticipated annual Hype Cycle report and the big news is that Internet of Things has now replaced Big Data as the most hyped technology. Indeed, we're hearing more and more about this fascinating new technological paradigm. Every other IT news item seems to be about IoT and its implications on the future of digital business.
BSQUARE is a global leader of embedded software solutions. We enable smart connected systems at the device level and beyond that millions use every day and provide actionable data solutions for the growing Internet of Things (IoT) market. We empower our world-class customers with our products, services and solutions to achieve innovation and success. For more information, visit www.bsquare.com.
With the iCloud scandal seemingly in its past, Apple announced new iPhones, updates to iPad and MacBook as well as news on OSX Yosemite. Although consumers will have to wait to get their hands on some of that new stuff, what they can get is the latest release of iOS 8 that Apple made available for most in-market iPhones and iPads. Originally announced at WWDC (Apple’s annual developers conference) in June, iOS 8 seems to spearhead Apple’s newfound focus upon greater integration of their products into everyday tasks, cross-platform mobility and self-monitoring. Before you update your device, here is a look at some of the new features and things you may want to consider from a mobile security perspective.