Ciclo de vida do componente OSGi

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

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.slf4j.Logger;
import org.slf4j.LoggerFactory;

@Component(
    service = { Activities.class }
)
public class ActivitiesImpl implements Activities {
    private static final Logger log = LoggerFactory.getLogger(ActivitiesImpl.class);

    private String[] activities;

    private final Random random = new 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() {
        this.activities = new String[] {
            "Running", "Cycling",  "Skateboarding"
        };

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

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