Basic OSGi Gogo shell consuming a Liferay service

ListUsersCommand.java

import java.util.List;

import com.liferay.gogo.commands.user.internal.AbstractUserManagementCommand;
import com.liferay.portal.kernel.exception.SystemException;
import com.liferay.portal.model.User;
import com.liferay.portal.service.UserLocalService;

import aQute.bnd.annotation.component.Component;
import aQute.bnd.annotation.component.Reference;

@Component(properties = {
		"osgi.command.function=listByCompany",
		"osgi.command.scope=usermanagement"
	}, provide=Object.class)
public class ListUsersCommand extends AbstractUserManagementCommand {

	public void listByCompany(long companyId) throws SystemException {
		List<User> users = _userLocalService.getCompanyUsers(
			companyId, -1, -1);

		System.out.println("Users of the company " + companyId);

		for (User user : users) {
			System.out.println(
				"\tUser " + user.getEmailAddress() + "with id " +
					user.getUserId());
		}
	}

	@Reference
	public void setUserLocalService(UserLocalService userLocaService) {
		_userLocalService = userLocaService;
	}

}