Added more trivial core implementations.
diff --git a/net/core/trivial/src/main/java/org/onlab/onos/net/trivial/impl/SimpleHostManager.java b/net/core/trivial/src/main/java/org/onlab/onos/net/trivial/impl/SimpleHostManager.java
new file mode 100644
index 0000000..8e16877
--- /dev/null
+++ b/net/core/trivial/src/main/java/org/onlab/onos/net/trivial/impl/SimpleHostManager.java
@@ -0,0 +1,77 @@
+package org.onlab.onos.net.trivial.impl;
+
+import org.apache.felix.scr.annotations.Activate;
+import org.apache.felix.scr.annotations.Component;
+import org.apache.felix.scr.annotations.Deactivate;
+import org.apache.felix.scr.annotations.Service;
+import org.onlab.onos.net.host.HostDescription;
+import org.onlab.onos.net.host.HostProvider;
+import org.onlab.onos.net.host.HostProviderBroker;
+import org.onlab.onos.net.host.HostProviderService;
+import org.onlab.onos.net.provider.AbstractProviderBroker;
+import org.onlab.onos.net.provider.AbstractProviderService;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+/**
+ * Provides basic implementation of the host SB & NB APIs.
+ */
+@Component(immediate = true)
+@Service
+public class SimpleHostManager implements HostProviderBroker {
+
+ private Logger log = LoggerFactory.getLogger(SimpleHostManager.class);
+
+ private final HostProviderBroker broker = new InternalBroker();
+
+ @Activate
+ public void activate() {
+ log.info("Started");
+ }
+
+ @Deactivate
+ public void deactivate() {
+ log.info("Stopped");
+ }
+
+ @Override
+ public HostProviderService register(HostProvider provider) {
+ log.info("Registering provider {}", provider.id());
+ return broker.register(provider);
+ }
+
+ @Override
+ public void unregister(HostProvider provider) {
+ log.info("Unregistering provider {}", provider.id());
+ broker.unregister(provider);
+ }
+
+ // Internal delegate for tracking various providers and issuing them a
+ // personalized provider service.
+ private class InternalBroker extends AbstractProviderBroker<HostProvider, HostProviderService>
+ implements HostProviderBroker {
+ @Override
+ protected HostProviderService createProviderService(HostProvider provider) {
+ return new InternalHostProviderService(provider);
+ }
+ }
+
+ // Personalized host provider service issued to the supplied provider.
+ private class InternalHostProviderService extends AbstractProviderService<HostProvider>
+ implements HostProviderService {
+
+ public InternalHostProviderService(HostProvider provider) {
+ super(provider);
+ }
+
+ @Override
+ public void hostDetected(HostDescription hostDescription) {
+ log.info("Host {} detected", hostDescription);
+ }
+
+ @Override
+ public void hostVanished(HostDescription hostDescription) {
+ log.info("Host {} vanished", hostDescription);
+ }
+ }
+}