Added more trivial core implementations.

@@ -14,7 +14,7 @@ public interface HostProvider extends Provider {
      * Triggers an asynchronous probe of the specified host, intended to
      * determine whether the host is present or not. An indirect result of this
      * should be invocation of {@link org.onlab.onos.net.host.HostProviderService#hostDetected(HostDescription)} or
-     * {@link org.onlab.onos.net.host.HostProviderService#hostNotDetected(HostDescription)}
+     * {@link org.onlab.onos.net.host.HostProviderService#hostVanished(HostDescription)}
      * at some later point in time.
      *
      * @param host host to probe

@@ -20,6 +20,6 @@ public interface HostProviderService extends ProviderService<HostProvider> {
      *
      * @param hostDescription description of host
      */
-    void hostNotDetected(HostDescription hostDescription);
+    void hostVanished(HostDescription hostDescription);
 
 }

@@ -8,17 +8,17 @@ import org.onlab.onos.net.provider.ProviderService;
 public interface LinkProviderService extends ProviderService<LinkProvider> {
 
     /**
-     * Signals that an infrastructure link has been connected.
+     * Signals that an infrastructure link has been detected.
      *
      * @param linkDescription link information
      */
-    void linkConnected(LinkDescription linkDescription);
+    void linkDetected(LinkDescription linkDescription);
 
     /**
-     * Signals that an infrastructure link has been disconnected.
+     * Signals that an infrastructure link has disappeared.
      *
      * @param linkDescription link information
      */
-    void linkDisconnected(LinkDescription linkDescription);
+    void linkVanished(LinkDescription linkDescription);
 
 }

+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);
+        }
+    }
+}

+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.link.LinkDescription;
+import org.onlab.onos.net.link.LinkProvider;
+import org.onlab.onos.net.link.LinkProviderBroker;
+import org.onlab.onos.net.link.LinkProviderService;
+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 link SB & NB APIs.
+ */
+@Component(immediate = true)
+@Service
+public class SimpleLinkManager implements LinkProviderBroker {
+
+    private Logger log = LoggerFactory.getLogger(SimpleLinkManager.class);
+
+    private final LinkProviderBroker broker = new InternalBroker();
+
+    @Activate
+    public void activate() {
+        log.info("Started");
+    }
+
+    @Deactivate
+    public void deactivate() {
+        log.info("Stopped");
+    }
+
+    @Override
+    public LinkProviderService register(LinkProvider provider) {
+        log.info("Registering provider {}", provider.id());
+        return broker.register(provider);
+    }
+
+    @Override
+    public void unregister(LinkProvider 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<LinkProvider, LinkProviderService>
+            implements LinkProviderBroker {
+        @Override
+        protected LinkProviderService createProviderService(LinkProvider provider) {
+            return new InternalLinkProviderService(provider);
+        }
+    }
+
+    // Personalized link provider service issued to the supplied provider.
+    private class InternalLinkProviderService extends AbstractProviderService<LinkProvider>
+            implements LinkProviderService {
+
+        public InternalLinkProviderService(LinkProvider provider) {
+            super(provider);
+        }
+
+        @Override
+        public void linkDetected(LinkDescription linkDescription) {
+            log.info("Link {} detected", linkDescription);
+        }
+
+        @Override
+        public void linkVanished(LinkDescription linkDescription) {
+            log.info("Link {} vanished", linkDescription);
+        }
+    }
+}