Examples with EventSubscriber org.apache.cloudstack.framework.events.EventSubscriber used on opensource projects

Example 6 with EventSubscriber

use of org.apache.cloudstack.framework.events.EventSubscriber in project cloudstack by apache.

the class InMemoryEventBus method subscribe.

@Override
public UUID subscribe(EventTopic topic, EventSubscriber subscriber) throws EventBusException {
    if (subscriber == null || topic == null) {
        throw new EventBusException("Invalid EventSubscriber/EventTopic object passed.");
    }
    UUID subscriberId = UUID.randomUUID();
    subscribers.put(subscriberId, new Pair<EventTopic, EventSubscriber>(topic, subscriber));
    return subscriberId;
}

Example 7 with EventSubscriber

use of org.apache.cloudstack.framework.events.EventSubscriber in project cloudstack by apache.

the class InMemoryEventBus method publish.

@Override
public void publish(Event event) throws EventBusException {
    if (subscribers == null || subscribers.isEmpty()) {
        // no subscriber to publish to, so just return
        return;
    }
    for (UUID subscriberId : subscribers.keySet()) {
        Pair<EventTopic, EventSubscriber> subscriberDetails = subscribers.get(subscriberId);
        // if the event matches subscribers interested event topic then call back the subscriber with the event
        if (isEventMatchesTopic(event, subscriberDetails.first())) {
            EventSubscriber subscriber = subscriberDetails.second();
            subscriber.onEvent(event);
        }
    }
}

Example 8 with EventSubscriber

use of org.apache.cloudstack.framework.events.EventSubscriber in project cloudstack by apache.

the class InMemoryEventBusTest method testUnsubscribe.

@Test
public void testUnsubscribe() throws Exception {
    EventTopic topic = mock(EventTopic.class);
    EventSubscriber subscriber = mock(EventSubscriber.class);
    InMemoryEventBus bus = new InMemoryEventBus();
    UUID uuid = bus.subscribe(topic, subscriber);
    assertNotNull(uuid);
    String uuidStr = uuid.toString();
    assertTrue(UuidUtils.validateUUID(uuidStr));
    assertTrue(bus.totalSubscribers() == 1);
    //
    bus.unsubscribe(uuid, subscriber);
    assertTrue(bus.totalSubscribers() == 0);
}

Example 9 with EventSubscriber

use of org.apache.cloudstack.framework.events.EventSubscriber in project cloudstack by apache.

the class RabbitMQEventBus method unsubscribe.

@Override
public void unsubscribe(UUID subscriberId, EventSubscriber subscriber) throws EventBusException {
    try {
        String classname = subscriber.getClass().getName();
        String queueName = UUID.nameUUIDFromBytes(classname.getBytes()).toString();
        Ternary<String, Channel, EventSubscriber> queueDetails = s_subscribers.get(queueName);
        Channel channel = queueDetails.second();
        channel.basicCancel(queueName);
        s_subscribers.remove(queueName, queueDetails);
    } catch (Exception e) {
        throw new EventBusException("Failed to unsubscribe from event bus due to " + e.getMessage());
    }
}

Example 10 with EventSubscriber

use of org.apache.cloudstack.framework.events.EventSubscriber in project cloudstack by apache.

the class InMemoryEventBusTest method testSubscribeFailTopic.

@Test(expected = EventBusException.class)
public void testSubscribeFailTopic() throws Exception {
    EventSubscriber subscriber = mock(EventSubscriber.class);
    InMemoryEventBus bus = new InMemoryEventBus();
    bus.subscribe(null, subscriber);
}