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Luckily, this is not the case because the specification has tried to avoid such pitfalls and two interesting projects exist today to simplify our life:

• Apache Aries Blueprint (Blueprint Services is implementation of the OSGi standardized version of Spring-DM)
• Spring Dynamic Modules (Spring)
• iPOJO (Apache Felix)

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Remark : The OSGI specification is currently working on integration of the work done by Spring with their Dynamic Modules under the RFC 124 - blueprint services and Apache Geronimo community has already started to work on thatv4R2 has been published recently and contain the Blueprint Service specification - RFC 124.

So now, it is time to create the interface that we will use in this project. Open Eclipse environment if not already done and create a new folder "service" in src/main/java/demo tree. Add the interface TransformService.java and copy paste the code below:

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