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1. SUN JDK 6.0+(J2SE 1.6)
2. Eclipse IDS for Java EE Developers, which is platform specific
3. Apache Geronimo Eclipse Plugin 3v3.*0
4. OSGi Application Development Tools
5. Apache Geronimo Server 3v3.*0

Details on installing Eclipse are provided in the Development environment section. This tutorial is organized in the following sections:

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1. Modify the code of HelloWorldServiceImpl as follows.
   

   Code Block
   java java title HelloWorldServiceImpl.java
   package com.sample.blueprint.helloworld.server; import com.sample.blueprint.helloworld.api.*; public class HelloWorldServiceImpl implements HelloWorldService { public void hello() { System.out.println("======>>> A message from the server: Hello World!"); } public void startUp() { System.out.println("======>>> Starting HelloWorld Server"); } }

2. Right-click the project name and create a Blueprint file, then modify the xml file as follows. The blueprint file is placed under OSGI-INF\blueprint directory automatically.
   

   Code Block
   xml blueprint.xml
   <?xml version="1.0" encoding="UTF-8"?> <blueprint xmlns="http://www.osgi.org/xmlns/blueprint/v1.0.0"> <bean id="helloservice" class="com.sample.blueprint.helloworld.server.HelloWorldServiceImpl" init-method="startUp"> </bean> <service ref="helloservice" interface="com.sample.blueprint.helloworld.api.HelloWorldService"/> </blueprint>

3. Modify META-INF\MANIFEST.MF and make sure com.sample.blueprint.helloworld.api is listed under Import-Pakcage.
   
   

Creating the client to consume the services

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1. Check the console of the server, the messages displays as each bundles initialized sequentially.
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