Propiedades de configuración de OSGi

package com.adobe.aem.wknd.examples.core.adventures.impl;

import java.util.Map;
import java.util.Random;

import com.adobe.aem.wknd.examples.core.adventures.Activities;

import org.osgi.service.component.annotations.Activate;
import org.osgi.service.component.annotations.Component;
import org.osgi.service.component.annotations.Deactivate;
import org.osgi.util.converter.Converters;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

@Component(
    service = { Activities.class },
    property = {
        "activities=Hiking",
        "activities=Jogging",
        "activities=Walking",
        "random.seed:Integer=10"
    }
)
public class ActivitiesImpl implements Activities {
    private static final Logger log = LoggerFactory.getLogger(ActivitiesImpl.class);

    private String[] activities;

    private Random random;

    /**
     * @return the name of a random WKND adventure activity
     */
    public String getRandomActivity() {
        int randomIndex = random.nextInt(activities.length);
        return activities[randomIndex];
    }

    @Activate
    protected void activate(Map<String, Object> properties) {

        this.activities = Converters.standardConverter()
                .convert(properties.get("activities"))
                .defaultValue(new String[] {
                    "Default Activity 1",
                    "Default Activity 2"
                })
                .to(String[].class);

        final Integer randomSeed = Converters.standardConverter()
                .convert(properties.get("random.seed"))
                .defaultValue(25)
                .to(Integer.class);

        this.random = new Random(randomSeed);

        log.info("Activated ActivitiesImpl with activities [ {} ]", String.join(", ", this.activities));
    }

    @Deactivate
    protected void deactivate() {
        log.info("ActivitiesImpl has been deactivated!");
    }
}