tom | d735672 | 2014-08-26 01:07:39 -0700 | [diff] [blame] | 1 | package org.onlab.onos.event; |
| 2 | |
| 3 | import com.google.common.collect.ImmutableSet; |
| 4 | |
| 5 | import java.util.Map; |
| 6 | import java.util.Set; |
| 7 | import java.util.concurrent.ConcurrentHashMap; |
| 8 | |
| 9 | import static com.google.common.base.Preconditions.checkArgument; |
| 10 | import static com.google.common.base.Preconditions.checkNotNull; |
| 11 | |
| 12 | /** |
tom | 96dfcab | 2014-08-28 09:26:03 -0700 | [diff] [blame] | 13 | * Base implementation of event sink registry. |
tom | d735672 | 2014-08-26 01:07:39 -0700 | [diff] [blame] | 14 | */ |
tom | 96dfcab | 2014-08-28 09:26:03 -0700 | [diff] [blame] | 15 | public class DefaultEventSinkRegistry implements EventSinkRegistry { |
tom | d735672 | 2014-08-26 01:07:39 -0700 | [diff] [blame] | 16 | |
tom | 96dfcab | 2014-08-28 09:26:03 -0700 | [diff] [blame] | 17 | private final Map<Class<? extends Event>, EventSink<? extends Event>> |
| 18 | sinks = new ConcurrentHashMap<>(); |
tom | d735672 | 2014-08-26 01:07:39 -0700 | [diff] [blame] | 19 | |
| 20 | @Override |
| 21 | public <E extends Event> void addSink(Class<E> eventClass, EventSink<E> sink) { |
| 22 | checkNotNull(eventClass, "Event class cannot be null"); |
| 23 | checkNotNull(sink, "Event sink cannot be null"); |
| 24 | checkArgument(!sinks.containsKey(eventClass), |
| 25 | "Event sink already registered for %s", eventClass.getName()); |
| 26 | sinks.put(eventClass, sink); |
| 27 | } |
| 28 | |
| 29 | @Override |
| 30 | public <E extends Event> void removeSink(Class<E> eventClass) { |
| 31 | checkNotNull(eventClass, "Event class cannot be null"); |
| 32 | checkArgument(sinks.remove(eventClass) != null, |
| 33 | "Event sink not registered for %s", eventClass.getName()); |
| 34 | } |
| 35 | |
| 36 | @Override |
| 37 | @SuppressWarnings("unchecked") |
| 38 | public <E extends Event> EventSink<E> getSink(Class<E> eventClass) { |
tom | b36046e | 2014-08-27 00:22:24 -0700 | [diff] [blame] | 39 | // TODO: add implicit registration of descendant classes |
tom | d735672 | 2014-08-26 01:07:39 -0700 | [diff] [blame] | 40 | return (EventSink<E>) sinks.get(eventClass); |
| 41 | } |
| 42 | |
| 43 | @Override |
| 44 | public Set<Class<? extends Event>> getSinks() { |
| 45 | return ImmutableSet.copyOf(sinks.keySet()); |
| 46 | } |
| 47 | } |