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"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."

"SwitchYard is a lightweight service delivery framework providing full lifecycle support for developing, deploying, and managing service-oriented applications. Wait, what? You mean like an Enterprise Service Bus (ESB)? Yeah, kind of. At it's core, SwitchYard provides an embeddable services runtime with limited dependencies, allowing you to deploy and run services where you need them: inside unit tests, embedded in your own applications, as modules in an OSGi framework, or within an application server. Of course, there will be modular components on top of core to provide connectivity, transformation, routing and orchestration, and all the other features that are typically associated with an ESB. The main difference between SwitchYard and traditional ESB offerings is that we are trying to make the runtime a transparent detail in the service lifecycle. SwitchYard aims to keep you focused on your services by providing tooling to help define, test, and manage the important details of a service - it's contract, policies, configuration, composition, and management . After all, the least important detail of your service is where it runs."

"We'll be covering all aspects of mobile application development! This includes the latest HTML5 technologies used in the mobile web, and in hybrid application frameworks like the Apache Cordova. All the way to JBoss AS based services, mobile RichFaces/JSF2, tooling, and native application support, and prototyping. "

Setting up an infrastructure for Instant Messaging" article series. In my previous tutorials, I showed you how to setup the Openfire IM Server and how to configure the Spark client in order to connect to that server. In this tutorial, I will show you how to add XMPP messaging capabilities to your own application. I will use the Smack library, an Open Source XMPP (Jabber) client library for instant messaging and presence. Smack is a pure Java library and can be embedded into your applications to create anything from a full XMPP client to simple XMPP integrations.

Google provides a scalable application hosting environment called Google App Engine (GAE). One of the many benefits of GAE is that hosting small scale applications is 100% free. Google starts charging for hosting when your application resource requirements start to grow.

"I've had an opportunity recently to work on a product that needed an RIA web interface, and I chose my recent favorite tool for this, Vaadin. The services for this project needed to be highly scalable, and lent themselves well to functional techniques, so I selected Scala as my language of choice. I build my projects with Maven, for reasons I won't go into right now, and I do much of my JVM-language work in Intellij's excellent IDEA IDE. Given these tools, I found a way to facilitate very rapid development of web UI's, and I thought I'd pass it along. Another technique I use, which I'll expound on later, is creating "dummy" implementations of all of my backing services for my application. The "real" implementations are written as OSGi services, in separate modules from my UI. The UI is packaged as a war, but is also OSGi aware, with a bundle activator. This activator only gets called if the war is deployed into an OSGi container, and not otherwise. This allows the app to select which implementation of the services it uses - the "dummy" ones when it's deployed outside of OSGi, and the "real" ones when they're available. This means I can use the handy Maven jetty plugin to quickly spin up my application and test it on my local workstation, without needing all of the dependencies (like a data store and such) of my real services. That's good, in that I can get my "cycle time" down to a few seconds, where "cycle time" is the time between making a change and actually being able to test it in my browser. We can do better, though. I'm using Scala as my language of choice for building the UI as well, as it works just fine with Vaadin (and with everything else in the JVM ecosystem, for that matter, which is why I didn't choose a non-JVM language - but that's yet another rant). I compile my Scala with the Maven scala plugin - here's where the next handy bit comes into play. Turns out the Scala plugin has a goal cal

Gaelyk is a lightweight Groovy toolkit for Google App Engine Java. Gaelyk lets you deploy small applications on Google App Engine Java. Gaelyk gives you the choice to use Groovy for developing your applications. Gaelyk builds upon Groovlets. and the Groovy template servlet Gaelyk allows you to cleanly seperate your views with Groovy templates and your actions in Groovlets. Gaelyk simplifies the usage of the Google App Engine SDK by providing more concise and more powerful shortcuts when using the datastore, memcache, the blobstore, the images service, the URL fetch service, when sending and receiving emails or Jabber messages, and much more. Gaelyk lets you define friendly REST-ful URLs thanks to its URL routing system Gaelyk provides a simple plugin system for improving code reuse and code sharing You can: download Gaelyk in the download area, learn how to create Gaelyk applications by reading the extensive tutorial, and participate in the community.

Provide mechanisms for integrating Java security providers into Eclipse: Applications that need to implement security related functionality require cryptographic services upon which to build. Java provides the Java Cryptography Architecture (JCA) as a mechanism for installing implementations of several interfaces used for cryptography, including MessageDigest, Signature, KeyStore, Certstore, and more. In a typical Java application, these implementations reside in the extensions directory of the JRE. In a dynamic Eclipse application, the appropriate packaging mechanism is in Eclipse plug-ins. The goal is to allow JCA to be used in an Eclipse environment while maintaining the programming model of the JCA subsystem. A related goal is to expose the configuration of the JCA system via an Eclipse-based user interface, allowing authorized users to inspect and modify the Security object.

SymmetricDS is web-enabled, database independent, data synchronization/replication software. It uses web and database technologies to replicate tables between relational databases in near real time. The software was designed to scale for a large number of databases, work across low-bandwidth connections, and withstand periods of network outage. By using database triggers, SymmetricDS guarantees that data changes are captured and atomicity is preserved. Support for database vendors is provided through a Database Dialect layer, with implementations for MySQL, Oracle, SQL Server, PostgreSQL, DB2, Firebird, HSQLDB, H2, and Apache Derby included. Synchronization can be configured to push data (trickle-back) or pull data (trickle-poll) at an interval. SymmetricDS allows for synchronization between two or more tiers of nodes, such as the following: A farm of web server nodes fronting an enterprise-class general office database A handful of regional servers for synchronizing from the general office to remote geographical areas 1000(s) of store server nodes using a departmental class database to sync with a regional node 10(s) of Point of Sale (POS) register nodes using an embedded database to sync with a store server Deployment options include the following: Web application archive (WAR) deployed to an application server such as Tomcat, Jetty, or JBoss Standalone service Embedded in an application SymmetricDS is written in Java and licensed as open source software under the GNU Lesser General Public License (LGPL).

"Spring Social is an extension of the Spring Framework that allows you to connect your applications with Software-as-a-Service (SaaS) providers such as Facebook and Twitter. Features An extensible service provider framework that greatly simplifies the process of connecting local user accounts to hosted provider accounts. A connect controller that handles the authorization flow between your Java/Spring web application, a service provider, and your users. Java bindings to popular service provider APIs such as Facebook, Twitter, LinkedIn, TripIt, GitHub, and Gowalla. A sign-in controller that enable users to authenticate with your application by signing through a service provider. "

"Contributed and administered by ICEsoft Technologies Inc., ICEpdf.org is a place where enterprise Java developers can learn, share, and contribute information and ideas to a growing community of ICEpdf developers. ICEpdf is an open source Java PDF engine that can render, convert, or extract PDF content within any Java application or on a Web server. ICEpdf.org provides a range of development and support resources to benefit all ICEpdf developers. Source code and application reference implementations are available for download here. Numerous reference implementations and examples are available to enable rapid learning and successful use of the product. The reference implementations are commercial quality implementations that can be deployed as-is, customized to meet specific requirements, or used as learning aids on how to use various features. Visit the ICEpdf demos page to see ICEpdf in action and to evaluate the capabilities of ICEpdf as a Java PDF viewer or deployed as servlet a headless server engine. Remember that ICEpdf is completely customizable and and can be completely embedded in your Java application. We invite you to join the ICEpdf community and to participate in the user forums. The resources available here and on the ICEpdf forums will get you up and developing that much quicker. "

"This release brings some brand new features in GWT Application development Java API for Adobe Flex (AIR and Browser) More then 500 rich UI Compoments for your application ( http://www.gwt4air.appspot.com/) Client side file processing. Specially PDF and Excel Easy integration with your existing GWT application. Because the project is based on GWT, no need of a middleware to connect the Flex UI to the backend "

Imagine a scenario where you have some Word documents created in MS Word and you want to display them in your web application. So how would you view the content of the file? A suitable and easy solution is if you could get the HTML form of the Word document then it can be viewed in the web browser within your application. Isn't it great when you could view the documents without having installed some Office viewer? Let's now find out how did we make use of HTML format in making GroupDocs.Assembly more powerful and useful for you. Since version 19.5, the assembled Word Processing documents, Spreadsheets, Presentations, and Email files could be saved as HTML with external resources. This means that the generated reports can now be saved as HTML files along with the resources such as images and, as I have mentioned before, you would be able to embed and view the content of the generated reports within your web application. Read more - https://bit.ly/2WRtqqc

A tutorial on how to create a web application using basic Spring MVC from spring-framework 3.0.5. We will design our web-based application based on the standard Spring MVC where request to the web-app will be routed to a Controller module, then to it's jsp View with data from our business Model

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.

" 1 Riena/RCP Applications in the Web using RAP Christian Campo EclipseCon 2011 - March 22nd Confidential | Date | Other Information, if necessaryMärz 23, 2011 © 2002 IBM Corporation Copyright © 2011 compeople AG, Made available under the Eclipse Public License v 1.0 What is Riena again ? §  RCP based Framework §  Client / Server Applications §  Remote OSGi Service Support §  End-user focused Navigation Concept §  Promotes the separation of View and ViewControllerCopyright © 2011 compeople AG, Made available under the Eclipse Public License v 1.0 2 "

"Errai is a framework for building GWT applications Errai offers a set of components for building rich web applications using The Google Web Toolkit. The framework provides a unified federation and RPC infrastructure with true, uniform, asynchronous messaging across the client and server."

"Community Dashboard Framework (CDF) is a project that allows you to create friendly, powerful, fully featured dashboards on top of the Pentaho BI server. Former Pentaho dashboards had several drawbacks from a developer's point of view. The developing process was awkward, it required know-how of web technologies and programming languages, and basically it was time-consuming. CDF emerged as a need for a framework that overcame all those difficulties. The final result is a powerful framework featuring the following: . It is based on Open Source technologies. . It separates logic (JavaScript) of the presentation (HTML, CSS) . It features a life cycle with components interacting with each other . It uses AJAX . It is extensible, which gives the users a high level of customization: . Advanced users can extend the library of components. . They also can insert their own snippets of JavaScript and jQuery code. CDF can be used: . As part of a Pentaho solution. This is the most common scenario. . In a standalone mode as an alternative to the Pentaho User Console . Integrated with Portlets, PHP applications, intranet portals and even desktop applications. "

Vaadin is a Rapid Application Development (RAD) framework for RIA applications. I only know it for a few months but since I started experimenting with it, I'm really in favor of it. I see a lot of advantages compared to Sun's Java EE standard front-end framework JSF. First of all Vaadin is a java library, so you only have to write Java to build a complete frontend. No need for a specific frontend language, no need for converters (for comboboxes),… This also implies that you can use the full Java power on the frontend side and that's an huge advantage because frontend code is now type-safe and easily refactorable. You can unit test your frontend with JUnit. You can also use all existing java libraries on the frontend side, for example LOG4J. Another advantage is the fact that Vaadin is easy to learn (JSF isn't!) and to use: it's straigtforward. It feels like developing desktop apps and for me developing desktop apps feels much more intuitive than developing web-apps the way I'm used to. Vaadin uses convention over configuration. No need to register new components, validators or whatever in different xml files. Themes have a default folder and a default folder structure. Vaadin is very well documented. There's the book of Vaadin wich explains every aspect of the framework very clear. On the site there's a blog, a FAQ section, a wiki, a forum, examples with Java source code, … It's very easy to extend. Want to create your own Validator? Just implement an interface or extend another Validator and use it. Want to create your own custom server side component? Just extend the CustomComponent class or extend from another component. There's also an add-on directory where you can download UI components, data components, tools, themes, …

TouchKit allows developers to make applications that look and behave like iPhone applications using only Vaadin. This add-on is available under two licenses: AGPL and CVAL. If your project is compatible with AGPL, you can use the add-on for free; otherwise you must acquire a sufficient number of CVAL licenses before the 30-day trial period ends. For more info, click the license links in the summary above.