How to use Spring Integration in Osgi platform. This post outlines the method to use publish-subscribe pattern to make loose coupling osgi bundles.

eSoftHead is very pleased to announce that Engroup 1.5.07082009 is released. You can checkout its some screenshots at http://www.flickr.com/photos/37821412@N04/sets/72157621082360806/ before decide whether download it at http://esofthead.com/node/25.
Engroup 1.5.07082009 has the following new features and improvements according with the previous one:

eSoftHead replaces Engroup AIR client application by Flex client browser. In the past, several clients complained the [...]

A case study of developing RIA for both web and desktop application by using Adobe solutions: RIA/Flex.

In our last project, we faced 2 challenges of how to build the SaaS platform including various modules; some are developed by ourselves and some are third parties (Forum, Wiki, Mail, etc.). With third-parties, we limit modifying their code base and database schema due to client’s requirements. Here are our challenges:

Challenge 1: When a new user is registered, some our modules need to acknowledge and have re-actions. For example:

Document Management module creates a personal document workspace for that user.
Calendar module creates a personal calendar for that user.
Forum and Wiki register that user to their user database because Engroup supports Single Sign On (SSO) mechanism. That means any user registered to Engroup user database can access Forum and Wiki resources without registering their user database.
Since our application follows SaaS model, the modules acknowledging and having re-actions to that registered user are dynamically discovered at runtime. This prohibits us from invoking module API in static manner.

Challenge 2: We want to implement audit trail process. Each module installed into our platform must follow the rules of tracking our user activities. Our goal is to build a common API sending user activities to reporting server but all our modules must loose coupling with the reporting API. This design helps us to configure reporting server in different machines easily.

Web service is complicated, to understand web service you must know SOAP, WSDL, XML schema etc. CORBA is even more completed than Web service. Our team have many years experience of developing web services by using various libraries like Axis, XFire and Cxf .We spent nearly month to understand and practice each type of SOAP [...]

Caching is quite important to boost the application performance. There are many cache libraries in Java world, both commercial and open source. You should choose the existing library instead creating your own library. I see some guys in my previous companies develop their own cache, and it is not good for their project. Instead of [...]

Spring Dynamic Modules helps integrating Spring beans to Osgi platform seamlessly. It exports the Spring beans as Osgi services and it streats Spring-Osgi service as Spring bean. In the non-Osgi environment, developer can get the Spring beans via calling
ApplicationContext ctx = new ClasspathApplicationContext("example.xml");
BeanEx beanEx = (BeanEx)ctx.getBean("beanEx");
However, such calling will throw an exception in Spring DM [...]

Dear all,
I am very pleased to announce that Engroup 1.0 after more than one month of previous release date. It is the bug fix release for the previous one, Engroup 1.0 beta. You can download the Engroup at eSoftHead site and see the last changes at here.