Event Admin

Contents

Utilise la notion de topic (une string)
envoie des properties : Map<String, Object> properties = new HashMap<>();

Event Publisher Example

@Component(
    property = {
        "osgi.command.scope=fipro",
        "osgi.command.function=boss" },
    service = BossCommand.class)
public class BossCommand {
 
    @Reference
    EventAdmin eventAdmin;
 
    @Descriptor("As a mafia boss you want something to be done")
    public void boss(
        @Descriptor("the command that should be executed. "
            + "possible values are: convince, encash, solve")
        String command,
        @Descriptor("who should be 'convinced', "
            + "'asked for protection money' or 'finally solved'")
        String target) {
 
        // create the event properties object
        Map<String, Object> properties = new HashMap<>();
        properties.put(MafiaBossConstants.PROPERTY_KEY_TARGET, target);
        Event event = null;
 
        switch (command) {
            case "convince":
                event = new Event(MafiaBossConstants.TOPIC_CONVINCE, properties);
                break;
            case "encash":
                event = new Event(MafiaBossConstants.TOPIC_ENCASH, properties);
                break;
            case "solve":
                event = new Event(MafiaBossConstants.TOPIC_SOLVE, properties);
                break;
            default:
                System.out.println("Such a command is not known!");
        }
 
        if (event != null) {
            eventAdmin.postEvent(event);
        }
    }
}

Event Consumer Example

@Component(
    property = EventConstants.EVENT_TOPIC
        + "=" + MafiaBossConstants.TOPIC_CONVINCE)
public class Luigi implements EventHandler {
 
    @Override
    public void handleEvent(Event event) {
        System.out.println("Luigi: "
        + event.getProperty(MafiaBossConstants.PROPERTY_KEY_TARGET)
        + " was 'convinced' to support our family");
    }
}