ClojureProvidingComponent.java

package com.theoryinpractise.clojure;

import org.osgi.framework.ServiceReference;
import org.osgi.service.component.ComponentContext;

import java.util.Properties;

/**
 * @scr.component
 */

public class ClojureProvidingComponent {

    protected void activate(ComponentContext context) {
        System.out.println("Java OSGi activator!" );

        ClassLoader oldClassLoader = Thread.currentThread().getContextClassLoader();
        try {
            Thread.currentThread().setContextClassLoader(
              ClojureProvidingComponent.class.getClassLoader());

            Runnable run = (Runnable) context.getBundleContext().getBundle().loadClass(
                    "com.theoryinpractise.clojure.runnable").newInstance();

            context.getBundleContext().registerService(
                    Runnable.class.getName(), run, new Properties());

        } catch(Exception e) {
            e.printStackTrace();
        } finally {
            Thread.currentThread().setContextClassLoader(oldClassLoader);
        }



        // Now look up the service
        ServiceReference runReference = context.getBundleContext()
          .getServiceReference(Runnable.class.getName());

        Runnable theRunnable = (Runnable) context.getBundleContext()
          .getService(runReference);

        theRunnable.run();

    }

}