zeroconf: first raw impl

app/src/processing/app/zeroconf/BoardListener.java

@@ -0,0 +1,11 @@
+package processing.app.zeroconf;
+
+import javax.jmdns.ServiceEvent;
+
+public interface BoardListener {
+
+  void boardOffline(ServiceEvent serviceEvent);
+
+  void boardOnline(ServiceEvent serviceEvent);
+
+}

app/src/processing/app/zeroconf/Discovery.java

@@ -0,0 +1,36 @@
+package processing.app.zeroconf;
+
+import javax.jmdns.JmDNS;
+import javax.jmdns.NetworkTopologyDiscovery;
+import javax.jmdns.ServiceEvent;
+import javax.jmdns.ServiceListener;
+import java.io.IOException;
+import java.net.InetAddress;
+
+public class Discovery implements ServiceListener {
+
+  private final BoardListener listener;
+
+  public Discovery(BoardListener listener) throws IOException {
+    this.listener = listener;
+    for (InetAddress addr : NetworkTopologyDiscovery.Factory.getInstance().getInetAddresses()) {
+      JmDNS jmDNS = JmDNS.create(addr);
+      jmDNS.addServiceListener("_arduino._tcp.local.", this);
+    }
+  }
+
+  @Override
+  public void serviceAdded(ServiceEvent serviceEvent) {
+    serviceEvent.getDNS().requestServiceInfo(serviceEvent.getInfo().getServer(), serviceEvent.getName(), true);
+  }
+
+  @Override
+  public void serviceRemoved(ServiceEvent serviceEvent) {
+    listener.boardOffline(serviceEvent);
+  }
+
+  @Override
+  public void serviceResolved(ServiceEvent serviceEvent) {
+    listener.boardOnline(serviceEvent);
+  }
+}