Sketching SB & NB API.
Modified onos-of-api pom to subsume openflowj loxi-generated stuff.
diff --git a/net/api/src/main/java/org/onlab/onos/net/device/DeviceService.java b/net/api/src/main/java/org/onlab/onos/net/device/DeviceService.java
new file mode 100644
index 0000000..4048fbb
--- /dev/null
+++ b/net/api/src/main/java/org/onlab/onos/net/device/DeviceService.java
@@ -0,0 +1,52 @@
+package org.onlab.onos.net.device;
+
+import org.onlab.onos.net.Device;
+import org.onlab.onos.net.DeviceId;
+import org.onlab.onos.net.MastershipRole;
+
+/**
+ * Service for interacting with the inventory of infrastructure devices.
+ */
+public interface DeviceService {
+
+ /**
+ * Returns the current mastership role for the specified device.
+ *
+ * @param deviceId device identifier
+ * @return designated mastership role
+ */
+ MastershipRole getRole(DeviceId deviceId);
+
+ /**
+ * Returns an iterable collection of the currently known infrastructure
+ * devices.
+ *
+ * @return collection of devices
+ */
+ Iterable<Device> getDevices();
+
+ /**
+ * Returns the device with the specified identifier.
+ *
+ * @param deviceId device identifier
+ * @return device or null if one with the given identifier is not known
+ */
+ Device getDevice(DeviceId deviceId);
+
+
+// List<Port> getPorts(DeviceId deviceId);
+
+ /**
+ * Adds the specified device listener.
+ *
+ * @param listener device listener
+ */
+ void addListener(DeviceListener listener);
+
+ /**
+ * Removes the specified device listener.
+ *
+ * @param listener device listener
+ */
+ void removeListener(DeviceListener listener);
+}