Creating configurable properties

ConfigurableComponentPorpertiesImpl.java

package blog.techrevel.component.impl;

import org.osgi.service.component.annotations.Activate;
import org.osgi.service.component.annotations.Component;
import org.osgi.service.metatype.annotations.AttributeDefinition;
import org.osgi.service.metatype.annotations.AttributeType;
import org.osgi.service.metatype.annotations.Designate;
import org.osgi.service.metatype.annotations.ObjectClassDefinition;
import org.osgi.service.metatype.annotations.Option;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

@Component
@Designate(ocd = ConfigurableComponentPorpertiesImpl.Config.class)
public class ConfigurableComponentPorpertiesImpl {
	private static final Logger LOGGER = LoggerFactory.getLogger(ConfigurableComponentPorpertiesImpl.class);

	@ObjectClassDefinition(name = "Techrevel Sample Configuration", description = "This is sample configuration")
	public @interface Config {

		@AttributeDefinition(name = "Blog name", defaultValue = "techrevel", description = "Name of the blog")
		String blog_name();

		@AttributeDefinition(name = "Blog Url")
		String blog_URL() default "https://techrevel.blog";

		// Multi-values property
		@AttributeDefinition(name = "Blog Topics")
		String[] blog_Topics() default { "OSGi", "AEM" };

		@AttributeDefinition(name = "Blog Count", description = "Total number of blogs", type = AttributeType.INTEGER)
		int blogCount() default 0;

		// Password
		@AttributeDefinition(name = "password", type = AttributeType.PASSWORD)
		String password();

		// Checkbox
		@AttributeDefinition(name = "Blog is active?")
		boolean blogIsActive() default true;

		// Dropdown
		@AttributeDefinition(name = "Blog is hosted at?", options = { @Option(label = "WordPress", value = "wordpress"),
				@Option(label = "Blogspot", value = "blogspot") })
		String hostedAt() default "";
	}

	@Activate
	protected void activate(final Config config) {
		LOGGER.info("Blog name: " + config.blog_name());
		LOGGER.info("Blog URL: " + config.blog_URL());
		for (String topic : config.blog_Topics()) {
			LOGGER.info("Blog Topics: " + topic);
		}
		LOGGER.info("Blog Count: " + config.blogCount());
		LOGGER.info("Blog Password: " + config.password());
		LOGGER.info("Blog Is Active? " + config.blogIsActive());
		LOGGER.info("Blog is hosted at? " + config.hostedAt());
	}
}