Sujit Biswas wrote an interesting article which:
"[...] shows how to integrate Fuji simple service api with spring/springDM application, We will create a springDM application which instantiates the above provider Implementation , based on spring-config and spring-osgi-config files."
Fuji allows for Spring and OSGi services integration
"The simple service provides the capability to invoke/interact with JAVA code outside of JBI, i.e Service API provides a bridge between code that is hosted outside of a JBI component and service endpoints available on the NMR."
This enables integration of OSGI/POJO services with JBI. Read Sujit's article for more.
"Project Fuji forms the core component of Open ESB v3 effort and represents Sun's next generation open source integration runtime, focused on providing a lightweight, developer-friendly, and extensible platform for composite application development.
At the core of Project Fuji is a lightweight micro-kernel based on JBI (JSR 208) and OSGi. Packaged as an OSGi bundle, the micro-kernel can be installed in any OSGi R4 compliant runtime (such as Felix, Knopflerfish or Equinox), including GlassFish v3. JSR 208 support introduces a robust, message-based service bus to the OSGi environment and allows the wide range of existing JBI "components" (adapters and containers) to run in Fuji.
Developer experience is a primary focal point in Fuji as evidenced by the level of flexibility and accessibility offered in the platform. Starting with a rapid, top-down development language, IFL (Integration Flow Language), developers can quickly and easily generate an integration application using a domain-specific grammar. The service development model favors convention and configuration over boilerplate code and framework APIs, allowing integration developers to focus on the code that matters. "