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Mod4j (Modeling for Java) is an open source DSL-based environment for developing administrative enterprise applications. It uses a collection of DSL's to model different parts of the architecture, combined with manually written code. Currently Mod4j consists of four DSLs: the Business Domain DSL, Service DSL, Data Contract DSL and Presentation DSL. The modeling environment is seamlessly integrated into the Eclipse IDE which gives the developers one environment where they can easily switch back- and forth between models and code. The different DSL?s used in Mod4j can be used independently, but if they are used in collaboration they will be fully validated with each other. Apart from integration in the Eclipse IDE, Mod4j also supports the use of Maven. That is, using the DSL models as the source, the complete code generation process can be run automatically on a build server without the need for Eclipse. The Mod4j DSLs and the corresponding code generators are based on a reference architecture. This allows developers to model various aspects of the application and generate code that strictly follows this reference architecture. The reference architecture is described in a separate document. For a good understanding of the generated code it is useful to read this document.

"Let's imagine we want to create an application for orders. People can sign in to the system, place orders for various items, check out and have them sent to their address. Very simple, but we can show a lot of things here. As we expect to be writing more than one application of this type and as we also would like to be able to express the structure of the application on a business level (one of the major drivers for DSLs and MDSD for that matter), we come up with the idea of using a DSL to describe what the application does. Defining the DSL is what we did last week. This week, we need to map the concepts of the DSL to some code and some APIs we're going to program against. So, we're going to create a set of code templates for a code generator that can then read our DSL models and create persistence code for us."

" Xtext has been released as a part of the Eclipse Galileo release train on June 24th, 2009. Xtext is a framework for building DLSs (domain specific languages). In fact, it can be seen as a DSL for defining DSLs. In this article, we will develop a small DSL for defining entities."

"Essential is a project to create a workbench for applying Model Driven Development (MDD). The workbench allows to experiment with models, metamodels, templates and transformations in an integrated environment. The main focus is to provide a declarative environment oriented to prototyping and evolving custom DSL and MDD tools in a quick and clean way. Motivation for a new tool Essential.Meta. DSL for Metamodelling Modelling with Essential StringTemplate, the template engine"

Papyrus is aiming at providing an integrated and user-consumable environment for editing any kind of EMF model and particularly supporting UML and related modeling languages such as SysML and MARTE. Papyrus provides diagram editors for EMF-based modeling languages amongst them UML 2 and SysML and the glue required for integrating these editors (GMF-based or not) with other MBD and MDSD tools. Papyrus also offers a very advanced support of UML profiles that enables users to define editors for DSLs based on the UML 2 standard. The main feature of Papyrus regarding this latter point is a set of very powerful customization mechanisms which can be leveraged to create user-defined Papyrus perspectives and give it the same look and feel as a "pure" DSL editor.

"If you didn't know already, Eclipse allows you to define custom templates for commonly used code snippets. Its a very neat feature for those of us who are memory challenged or don't like typing things twice! I think that Apache Camel users could really benefit from having predefined templates for doing Camel routing. I also hear a lot of requests like "I have this Java DSL route, how do I do this in the Spring XML DSL?" so having both Java and XML templates for the same thing is essential."

Xtext - Language Development Framework With Xtext you can easily create your own programming languages and domain-specific languages (DSLs). The framework supports the development of language infrastructures including compilers and interpreters as well as full blown Eclipse-based IDE integration. While Xtext equips you with a set of sensible defaults, you can tweak every single aspect of your language with Xtext's powerful APIs. A comprehensive documentation as well as the vivid community will help you getting started in no time. And if that is not enough you can buy trainings, consulting or support contracts delivered directly by the committers.

"Cross platform mobile development toolkit consisting of a DSL for defining mobile apps and code generators for creating native apps for iOS, Android, Windows Phone 7 and Google App Engine. Based on Eclipse and Xtext."

" I am Johan den Haan, working for Mendix as CTO. This blog is personal, all opinions are mine and should be taken with a pinch of salt. I write about topics in the field of enterprise architecture and software engineering, like SOA, SOBA, MDE, MDA, MDD, DSL, etc. Johan den Haan on Twitter "

" Over the past few years, and actually the past year, a lot of new initiatives have surfaced in the area of creating so called language workbenches - aiming at facilitating the definition and use of DSLs and code generation. We believe each of these has its own strengths and weaknesses, and none is 'the best' for every purpose. Still, a lot of people keep asking for the best workbench. Based on that, we are now planning to have a Language Workbench Competition, in which we will be able to compare the strengths and weaknesses of these workbenches based on solutions for a predefined set of cases. Keep an eye on this page for more details in the coming, as the cases are being defined and the possibilities of co-hosting this initative at Code Generation 2011 in Cambridge are being investigated."

There is no migration system in vanilla grails (although possibly in Grails 2.0 …. ?) but there do exist several plugins that provide  some migration functionality. As of this post I am aware of three: dbMigrate, Liquibase, and Autobase. Of these, I prefer Liquibase and cannot recommend it enough. While it uses XML to describe its changesets it is a mature open-source Java project that works flawlessly (and has some excellent documentation). I did not have much luck using DbMigrate and Autobase when including in an existing project… which is a shame as Autobase (which is built on Liquibase) uses a nice DSL syntax to build the migrations.

The aim of this paper is a brief introduction to MDA technology and a summary / comparison to the approachments to MDA of AndroMDA and Acceleo, intending to be a practical and understandable summary Introduction Model-driven architecture (MDA) is a software design approach for the development of software systems. It provides a set of guidelines for the structuring of specifications, which are expressed as models. It was launched by the Object Management Group (OMG) in 2001 The Model-Driven Architecture approach defines system functionality using a platform-independent model (PIM) using an appropriate domain-specific language (DSL). One of the main aims of the MDA is to separate design from architecture. As the concepts and technologies used to realize designs and the concepts and technologies used to realize architectures have changed at their own pace, decoupling them allows system developers to choose from the best and most fitting in both domains. The design addresses the functional (use case) requirements while architecture provides the infrastructure through which non-functional requirements like scalability, reliability and performance are realized. MDA envisages that the platform independent model (PIM), which represents a conceptual design realizing the functional requirements, will survive changes in realization technologies and software architectures.

"Apache Camel is a powerful open source integration framework based on known Enterprise Integration Patterns with powerful Bean Integration. Camel lets you create the Enterprise Integration Patterns to implement routing and mediation rules in either a Java based Domain Specific Language (or Fluent API), via Spring based Xml Configuration files or via the Scala DSL. This means you get smart completion of routing rules in your IDE whether in your Java, Scala or XML editor. Apache Camel uses URIs so that it can easily work directly with any kind of Transport or messaging model such as HTTP, ActiveMQ, JMS, JBI, SCA, MINA or CXF Bus API together with working with pluggable Data Format options. Apache Camel is a small library which has minimal dependencies for easy embedding in any Java application. Apache Camel lets you work with the same API regardless which kind of Transport used, so learn the API once and you will be able to interact with all the Components that is provided out-of-the-box. Apache Camel has powerful Bean Binding and integrated seamless with popular frameworks such as Spring and Guice. Apache Camel has extensive Testing support allowing you to easily unit test your routes. Apache Camel can be used as a routing and mediation engine for the following projects: * Apache ServiceMix which is the most popular and powerful distributed open source ESB and JBI container * Apache ActiveMQ which is the most popular and powerful open source message broker * Apache CXF which is a smart web services suite (JAX-WS) * Apache MINA a networking framework"

Sphinx is a new open source project under the Eclipse Model Development Tools (MDT) subproject to provide an extensible platform that eases the creation of integrated modeling tool environments supporting individual or multiple modeling languages (which can be UML-based or native DSLs) and has a particular focus on industrial strength and interoperability.

A Scala ORM and DSL for talking with Databases with minimum verbosity and maximum type safety

"Short screencasts that outlines features of applause, a domain-specific language (DSL) and code generator to produce native apps for iPhone, Android and BlackBerry. You can find this open-source project at code.google.com/​p/​applause"

The Whole Platform is an open source technology for engineering the production of software. Based on the idea that programming is an activity concerning the development of domain languages, the Whole Platform provides an Eclipse-based Language Workbench

"Code Generation is better than Model Interpretation in Model-Driven Development? In my latest blog post I add my point of view to the topic "Code Generation vs Model Interpretation"."

"THINK IN MODELS Models & Modeling, Enterprise Applications & Engineering"