Adding event sink & dispatcher abstractions.
Increased strength of the provider & service types.
diff --git a/net/api/src/main/java/org/onlab/onos/event/AbstractEventSinkBroker.java b/net/api/src/main/java/org/onlab/onos/event/AbstractEventSinkBroker.java
new file mode 100644
index 0000000..4ca3c3c
--- /dev/null
+++ b/net/api/src/main/java/org/onlab/onos/event/AbstractEventSinkBroker.java
@@ -0,0 +1,46 @@
+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 broker.
+ */
+public class AbstractEventSinkBroker implements EventSinkBroker {
+
+ 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) {
+ return (EventSink<E>) sinks.get(eventClass);
+ }
+
+ @Override
+ public Set<Class<? extends Event>> getSinks() {
+ return ImmutableSet.copyOf(sinks.keySet());
+ }
+}