springContext = new ClassPathXmlApplicationContext("my-spring-config.xml", this.getClass());

public class CoreActivator implements BundleActivator {

	private ApplicationContext springContext;
	private List<ServiceRegistration<?>> serviceRegister = new ArrayList<ServiceRegistration<?>>();

	@Override
	public void start(BundleContext bundleContext) throws Exception {
		// Get data remote service and register to OSGi
		DataRemoteService dataRemoteService = (DataRemoteService) getContext().getBean("dataRemoteService");
		ServiceRegistration<DataRemoteService> registration = bundleContext.registerService(DataRemoteService.class, dataRemoteService, null);
		serviceRegister.add(registration);
	}

	@Override
	public void stop(BundleContext bundleContext) throws Exception {
		// Unregister all services
		serviceRegister.forEach(s -> s.unregister());

		// Close spring context 
		if (springContext instanceof ConfigurableApplicationContext) {
			((ConfigurableApplicationContext) springContext).close();
		}
	}

	private synchronized ApplicationContext getContext() {
		if (springContext == null) {
			Thread currentThread = Thread.currentThread();
			ClassLoader originalClassloader = currentThread.getContextClassLoader();
			try {
				currentThread.setContextClassLoader(this.getClass().getClassLoader());
				springContext = new ClassPathXmlApplicationContext("spring-config.xml");
			} finally {
				currentThread.setContextClassLoader(originalClassloader);
			}
		}
		return springContext;
	}
}

	<bean id="emf" class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean">
		<property name="dataSource" ref="dataSource" />
		<property name="jpaVendorAdapter" ref="jpaVendorAdapter" />
		<property name="packagesToScan" value="${jpa.entity.packages}" />
		<property name="persistenceUnitName" value="myPU"/>

		<property name="loadTimeWeaver">
			<bean class="org.eclipse.equinox.weaving.springweaver.EquinoxAspectsLoadTimeWeaver">
				<property name="weaverScope" value="APPLICATION" />
			</bean>
		</property>
		<property name="jpaPropertyMap">
			<map>
				<entry key="eclipselink.weaving" value="true"/>
			</map>
		</property>
	</bean>