OSGI Bundle Activator class to activate a Bundle inside a OSGI Container (eg: Apache Karaf)

MainActivation.java

package com.redhat.camel.java;

import org.apache.camel.impl.DefaultCamelContext;
import org.osgi.framework.BundleActivator;
import org.osgi.framework.BundleContext;

/**
 * A Camel Application
 */
public class MainActivation implements BundleActivator{

        private DefaultCamelContext camelContext;
        private String bundleName;

        @Override
        public void start(BundleContext bundleContext) throws Exception {
                camelContext = new DefaultCamelContext();
                bundleName = bundleContext.getBundle().getSymbolicName();
                camelContext.setName(bundleName);
                camelContext.addRoutes(new MyRouteBuilder());
                camelContext.start();
        }

        @Override
        public void stop(BundleContext bundleContext) throws Exception {
                camelContext.stop();
        }
}

Use the maven bundle plugin to indicate to generate the Bundle OSGI JAR:

      <!-- OSGI Bundle Plugin -->
      <plugin>
        <groupId>org.apache.felix</groupId>
        <artifactId>maven-bundle-plugin</artifactId>
        <extensions>true</extensions>
        <configuration>
            <instructions>
                <Bundle-SymbolicName>${project.artifactId}</Bundle-SymbolicName>
                <Bundle-Name>${project.artifactId}</Bundle-Name>
                <Bundle-Version>${project.version}</Bundle-Version>
                <Bundle-Activator>com.redhat.camel.java.MainActivation</Bundle-Activator>
                <Import-Package>
                    org.osgi.framework,
                    *;resolution:=optional
                </Import-Package>
                <DynamicImport-Package>*</DynamicImport-Package>
            </instructions>
        </configuration>
      </plugin>