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Rest.js 0.9 Released

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This Week in Spring - March 26, 2013

Welcome to another installment of <EM>This Week in Spring</EM>! 
This week I'm in <Em>chilly</EM> (brrr!) London, England  and Paris, France, for <A href="www.devoxx.com/display/UK13/Home"> Devoxx UK</a> and <A href="www.devoxx.com/display/FR13/Home"> Devoxx FR</a> and - <EM>tonight</EM> - I gave a talk at <EM>Skills Matter</EM>  for the London Spring User Group. What a pleasant experience. If you're in France and want to talk Spring, don't hesitate <A href="http://twitter.com/starbuxman">to ping me</a>.
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Spring Petclinic is on Github!

We are pleased to announce that the Spring Petclinic sample application has been refactored.

The source code is now available on github. Here is a screenshot of the new application:

And here is an overview of the new architecture:

Spring, Spring, Spring

We have used the following Spring features:

  • Dependency Injection using Annotations
  • Data Access Integration using jdbc (JdbcTemplate), JPA or Spring Data JPA (repository layer). You can choose which implementation to use by setting up the corresponding bean profile in web.xml or in one of the JUnit tests.
  • Transactions using @Transactional (service layer)
  • Caching using @Cacheable with ehcache as a cache implementation (service layer)
  • Aspect Oriented Programming (to monitor how many times has been called each of the Repository methods)
  • Spring MVC: Form validation using Bean Validation (JSR-303)
  • Spring MVC: content negotiation (html, xml or atom) using ContentNegotiatingViewResolver.
  • Spring MVC: exception handling using SimpleMappingExceptionResolver
  • Spring MVC: use of the Spring MVC Test Framework

 

Our Vibrant Community

We have had quite a lot of contributions from experts in our community (including the leads of several open source projects).

 

Thymeleaf

In case you haven’t heard of it yet, Thymeleaf can be seen as a replacement for JSP. it defines itself as an  XML / XHTML / HTML5 template engine.

It is based on some plain HTML files with a little bit of namespace magic.

Daniel and Soraya from the Thymeleaf project have created a Spring-Petclinic branch that uses Thymeleaf instead of JSP. They have documented the migration steps in this blog entry: http://www.thymeleaf.org/petclinic.html

The Thymeleaf branch of Spring Petclinic is available here: https://github.com/thymeleaf/thymeleafexamples-petclinic

To learn more about Thymeleaf: http://www.thymeleaf.org

To follow Thymeleaf on twitter: https://twitter.com/thymeleaf

 

Dandelion

Dandelion provides a set of taglibs that you can use with JSP or Thymeleaf.

We have used it inside Spring-Petclinic to work with DataTables. It generates tables based on jQuery DataTables and Bootstrap.

You can do things like that:

```html ```

The output html table then looks like this:

Dandelion is used inside the main branch of Spring Petclinic.

Thibault Duchateau from the Dandelion project has written a nice blog entry that describes the migration of the Spring Petclinic application

To learn more about Dandelion:  http://dandelion.github.com/

To follow them on twitter: https://twitter.com/dandelion_proj

 

Maven or Gradle?

By default, Spring Petclinic uses Maven as it is the most common choice for Java applications. While Spring Petclinic is fairly small in comparison to most real-life applications, its Maven pom.xml file is pretty verbose already.

Li Yanhui from Thoughtworks China has been nice enough to migrate Spring Petclinic to Gradle. That is a great way to compare Maven and Gradle side by side. The build.gradle configuration file is indeed much simpler to understand. It currently contains 143 lines (as opposed to 543 lines for the Maven POM).

You can browse the Gradle-based version of Spring Petclinic here: https://github.com/whimet/spring-petclinic Thanks to them we have been able to identify a few places inside Spring Petclinic that contained code duplication and lacked of automated testing.

 

Performance Testing: Let’s Scale!

Would it be possible to take Spring Petclinic as it is now and scale it up to 1000 requests per second on a single server instance? Julien Dubois from Ippon Technologies has written a great series of five blog entries on that topic.

It answers questions such as: - Should I rely on the session context? (part 2) - Which Apache Tomcat connector should I use? (part 2) - Which database connection pool should I use? (part 3) - Is JDBC faster than JPA or Spring Data JPA? ( part 4) - What are the pros of using OpenSessionInViewFilter? ( part 4)

 

References

Spring Petclinic on GitHub Spring Petclinic on Cloud Foundry Petclinic + Thymeleaf Petclinic + Gradle

 

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When.js 2.0.0 Released

Dear Spring Community,

We are pleased to announce the release of when.js 2.0.0.

When.js is cujojs’s lightweight Promises/A+ and when() implementation, and powers the async core of wire.js, cujojs’s IOC Container. It also provides several other useful Promise-related concepts, such as joining multiple promises, mapping and reducing collections of promises, and timed promises.

This major release brings full Promises/A+ compliance, and async promise resolutions. It also includes a few new features, including a new when/keys module for working with object keys.

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Webinar Replay: Multi-Client Development with Spring

No application is an island and this is more obvious today than ever as applications extend their reach into people’s pockets, desktops, tablets, TVs, Blu-ray players and cars. What’s a modern developer to do to support these many platforms? In this talk, join Josh Long to learn how Spring can extend your reach through (sometimes Spring Security OAuth-secured) RESTful services exposed through Spring MVC, HTML5 and client-specific rendering thanks to Spring Mobile, and powerful, native support for Android with Spring Android.

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Spring Data GemFire 1.3.0 Released

I am pleased to announce the GA release of Spring Data GemFire 1.3.0. In addition to many minor bug fixes and enhancements, this release includes some notable new features to make writing Java applications with GemFire even easier:

Annotation Support For Functions


Annotation Support for Function Execution

Simplified Connection to a GemFire Datasource

GemFire exposes a lot of options for tuning the performance of it’s connection pool, and to configure how local data is managed an synchronized. The Spring Data GemFire namespace supports all of these options, however many applications are clients that simply need read/write access to the GemFire data grid. For this class of applications, it is now possible to connect to GemFire as a client without explicitly configuring a pool or client regions:

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This Week in Spring - March 12th, 2013

Welcome to another installment of This Week in Spring! This week, there's a lot of Spring Tool Suite news, so be sure to check out the new release and try it out. One last reminder: be sure to join me Thursday for a webinar introducing Spring's REST and mobile support at 3:00PM GMT (for Europeans) and 10:00AM PST (for North America). If you've wanted to learn how to build mobile applications for your Spring-based backend services, then this talk is for you. We'll look at Spring's rich support for REST, Android and mobile platforms, in general.

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SpringOne 2GX 2012 Replays: Addressing Messaging Challenges Using Open Technologies, Introduction to Spring Integration and Spring Batch

Addressing Messaging Challenges Using Open Technologies



For Modern Applications Many businesses are faced with some new messaging challenges for modern applications, such as horizontal scalability of the messaging tier, heterogeneous messaging systems and access methods, and extreme transaction processing. This presentation/demo will cover how businesses can overcome these messaging challenges with the use of Spring and RabbitMQ technologies.


Tom will build a case for AMQP, explain how SpringSource is providing AMQP support via Spring AMQP and Spring Integration, explain how RabbitMQ is a modern messaging solution that offers a reliable, highly available, scalable and portable messaging system with predictable and consistent throughput and latency, and demonstrate how Spring Integration and RabbitMQ can be progressively introduced into a standard Spring web application.






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Performance Improvements in STS 3.2.0

The latest release of the Spring Tool Suite (3.2.0) contains a large number of performance improvements in many different areas. We are not only adopting the latest improvements from the Eclipse Juno SR2 maintenance release (which fixes a large number of performance issues with the new Eclipse 4 platform UI), we also worked on the performance of many of the STS internals, specifically targeting Java editing and build times for Spring projects.

To demonstrate the improvements, here is a quick screencast showing STS 3.1.0 and 3.2.0 side-by-side:

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Spring Data REST 1.1.0.M1 Released

The Spring Data team is happy to announce the next major step in the evolution of exporting domain objects to the web using RESTful semantics: Spring Data REST 1.1.0.M1 is now available in the SpringSource milestone repository.

Spring Data REST Home | Source on GitHub | Reference Documentation

Export domain objects to the web

Spring Data REST is a set of Spring MVC components that you can add to your own Spring MVC applications that export your Spring Data Repositories to the web using RESTful, HATEOAS semantics. It provides a consistent interaction API by exporting repositories to RESTful URLs that are configurable in a couple different ways.

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