| package org.onlab.onos.event; |
| |
| import com.google.common.collect.ImmutableSet; |
| |
| import java.util.Map; |
| import java.util.Set; |
| import java.util.concurrent.ConcurrentHashMap; |
| |
| import static com.google.common.base.Preconditions.checkArgument; |
| import static com.google.common.base.Preconditions.checkNotNull; |
| |
| /** |
| * Base implementation of event sink registry. |
| */ |
| public class DefaultEventSinkRegistry implements EventSinkRegistry { |
| |
| private final Map<Class<? extends Event>, EventSink<? extends Event>> |
| sinks = new ConcurrentHashMap<>(); |
| |
| @Override |
| public <E extends Event> void addSink(Class<E> eventClass, EventSink<E> sink) { |
| checkNotNull(eventClass, "Event class cannot be null"); |
| checkNotNull(sink, "Event sink cannot be null"); |
| checkArgument(!sinks.containsKey(eventClass), |
| "Event sink already registered for %s", eventClass.getName()); |
| sinks.put(eventClass, sink); |
| } |
| |
| @Override |
| public <E extends Event> void removeSink(Class<E> eventClass) { |
| checkNotNull(eventClass, "Event class cannot be null"); |
| checkArgument(sinks.remove(eventClass) != null, |
| "Event sink not registered for %s", eventClass.getName()); |
| } |
| |
| @Override |
| @SuppressWarnings("unchecked") |
| public <E extends Event> EventSink<E> getSink(Class<E> eventClass) { |
| // TODO: add implicit registration of descendant classes |
| return (EventSink<E>) sinks.get(eventClass); |
| } |
| |
| @Override |
| public Set<Class<? extends Event>> getSinks() { |
| return ImmutableSet.copyOf(sinks.keySet()); |
| } |
| } |