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Spring Security customization (Part 1 - Customizing UserDetails or extending GrantedAuthority)

This is the first part of what I hope will become a multipart series of small posts showing practical examples around Spring Security customization. The requirements for these customizations are not imaginary and all came from the field…

Assume you have the following requirement. You have a list of roles where each role contains  list of business functions applicable to this role (see below):




Deploying GWT Applications in SpringSource dm Server - Part 3


This is the final blog in a series of three describing a step-by-step approach to building and deploying GWT applications in the SpringSource dm Server™. The first blog looked at the process of creating a simple WAR file from a sample GWT application and the second blog turned the GWT dependencies into an OSGi bundle which can be shared across multiple applications. This final blog will further modularize our GWT sample into OSGi services using Spring Dynamic Modules. This should clearly demonstrate the benefits of OSGi modularity: The ability to remove and replace services at runtime, seamlessly managing multiple versions of bundles and how straightforward it is to deploy and manage using dm Server.


Using Spring BlazeDS Integration 1.0.0.M1

Update: Most of the code examples shown below are out-of-date and superseded by those shown in the more current “Using Spring BlazeDS Integration 1.0” post.

Today we announced the public availability of the first milestone release of the newest member of the open source Spring project portfolio, Spring BlazeDS Integration. This project’s purpose is to make it easier to build Spring-powered Rich Internet Applications using Adobe Flex as the front-end client. It aims to achieve this purpose by providing first-class support for using the open source Adobe BlazeDS project and its powerful remoting and messaging facilities in combination with the familiar Spring programming model.


Slides and Demos from SpringOne Americas 2008

As promised to the attendees of my sessions, here is the content for my dm Server and concurrency sessions.

Introduction to dm Server

The slides and demo code for this presentation were attached to my previous entry: Getting Started with SpringSource dm Server.

While I was at the conference I met with David Winterfeldt from Spring by Example who pointed me at his great dm Server tutorial.

Advanced Concurrency

The slides for the Advanced Concurrency presentation can be found here and the demo code is here. Slides from last year’s concurrency presentation can be found here.


Spring Integration in Grails (Part 1)

Spring Integration last week went 1.0 GA and so, inspired by Adrian’s keynote (no, not the Monty Python sketch, just the Grails live-coding example) from SpringONE Americas, I thought it would be fun to show how to take advantage of Spring Integration in the slightly different setting of a Grails application.

Please note: This is a cross post from my own blog @

This series of articles will look at how to add Spring Integration to Grails in a number of configurations that will eventually lead to a full Grails plugin for Spring Integration. More like an online diary, you’ll get the chance to see how we take our first steps by bootstrapping Spring Integration into a Grails application, through using some of the more advanced features of Spring Integration to bridge messages across diverse infrastructures, to finally applying this experience to create a Grails plugin that you can use to quickly and easily add Spring Integration to your own Grails projects.


First Spring Framework 3.0 milestone released

I’m pleased to announce that Spring Framework 3.0 M1 is finally available for download!

This release features several major changes, including a start of the major 3.0 themes such as EL and REST support:

  • revised project layout and build system with module-based sources
  • updated entire codebase for Java 5 code style (generics, varargs)
  • updated to JUnit 4.5 and JRuby 1.1
  • introduced Spring EL parser (org.springframework.expression package)
  • introduced support for #{...} expressions in bean definitions
  • introduced expression-enabled @Value annotation for embedded expressions
  • introduced @PathVariable annotation for URI template handling in MVC handlers
  • introduced default value support for @RequestParam in MVC handlers
  • introduced @RequestHeader annotation for HTTP header access in MVC handlers
  • introduced AbstractAtomFeedView and AbstractRssFeedView base classes
  • introduced <spring:url> and <spring:param> JSP tags

The cat is out of the bag – tc Server announced

We just announced a new product called the SpringSource tc Server this week at the SpringOne Americas conference. Springsource tc Server is an enterprise-class web application server based on Apache Tomcat.

Although SpringSource is not the first company to build a product around Apache Tomcat (WebSphere Community Edition and JBoss both embed versions of Tomcat in their J2EE application servers and the developer release of JBoss Web 2.1.1 also embeds Tomcat), tc Server is unique in that it preserves the Tomcat servlet/JSP programming model. Applications written to Tomcat are 100% portable to tc Server and vice versa.


Deploying GWT Applications in SpringSource dm Server - Part 2


This is the second in a series of three blogs describing a step-by-step approach to building and deploying GWT applications in the SpringSource dm Server™. The first blog looked at the process of creating a simple WAR file from a sample GWT application. This next blog will look at turning the WAR file we created in Part 1 into a “Shared Libraries” WAR. This means that we are going to externalize the GWT dependencies of our application into an OSGi bundle so that it can be shared by any number of GWT applications. You can think of it as extending our dm Server with GWT remoting capabilities.


Diagnosing OSGi uses conflicts

In his recent blog entry, Glyn provided an introduction to the OSGi “uses” directive. In this blog, I want to dig a little deeper into the causes of uses constraint violations and present some tips for diagnosing uses problems in your applications.

For most of the examples I’m going to be using raw Equinox and not dm Server. The reason for this is that uses constraints are not specific to dm Server but are relevant to all OSGi users. At the end of this blog, I’ll demonstrate some of the smart constraint failure diagnostics built into dm Server.