remove dependency on Devices for handling MastershipEvents

Change-Id: Ie1670e77d3eee5dbd597f574ebe16d687e7b551e

@@ -358,7 +358,7 @@ public class OpticalConfigProvider extends AbstractProvider implements DevicePro
     }
 
     @Override
-    public void triggerProbe(Device device) {
+    public void triggerProbe(DeviceId deviceId) {
         // TODO We may want to consider re-reading config files and publishing them based on this event.
     }
 

@@ -15,7 +15,6 @@
  */
 package org.onlab.onos.net.device;
 
-import org.onlab.onos.net.Device;
 import org.onlab.onos.net.DeviceId;
 import org.onlab.onos.net.MastershipRole;
 import org.onlab.onos.net.provider.Provider;
@@ -35,9 +34,9 @@ public interface DeviceProvider extends Provider {
      * {@link org.onlab.onos.net.device.DeviceProviderService#deviceDisconnected}
      * at some later point in time.
      *
-     * @param device device to be probed
+     * @param deviceId ID of device to be probed
      */
-    void triggerProbe(Device device);
+    void triggerProbe(DeviceId deviceId);
 
     /**
      * Notifies the provider of a mastership role change for the specified

@@ -182,6 +182,9 @@ public class DeviceManager
 
     // Check a device for control channel connectivity.
     private boolean isReachable(DeviceId deviceId) {
+        if (deviceId == null) {
+            return false;
+        }
         DeviceProvider provider = getProvider(deviceId);
         if (provider != null) {
             return provider.isReachable(deviceId);
@@ -370,7 +373,6 @@ public class DeviceManager
             checkNotNull(portDescriptions,
                          "Port descriptions list cannot be null");
             checkValidity();
-
             if (!deviceClockProviderService.isTimestampAvailable(deviceId)) {
                 // Never been a master for this device
                 // any update will be ignored.
@@ -475,15 +477,7 @@ public class DeviceManager
             return true;
         }
 
-        Device device = store.getDevice(deviceId);
-        // FIXME: Device might not be there yet. (eventual consistent)
-        // FIXME relinquish role
-        if (device == null) {
-            log.warn("{} was not there. Cannot apply role {}", deviceId, newRole);
-            return false;
-        }
-
-        DeviceProvider provider = getProvider(device.providerId());
+        DeviceProvider provider = getProvider(deviceId);
         if (provider == null) {
             log.warn("Provider for {} was not found. Cannot apply role {}", deviceId, newRole);
             return false;
@@ -492,10 +486,7 @@ public class DeviceManager
 
         if (newRole.equals(MastershipRole.MASTER)) {
             // only trigger event when request was sent to provider
-            // TODO: consider removing this from Device event type?
-            post(new DeviceEvent(DEVICE_MASTERSHIP_CHANGED, device));
-
-            provider.triggerProbe(device);
+            provider.triggerProbe(deviceId);
         }
         return true;
     }

@@ -259,7 +259,7 @@ public class DeviceManagerTest {
         }
 
         @Override
-        public void triggerProbe(Device device) {
+        public void triggerProbe(DeviceId deviceId) {
         }
 
         @Override

@@ -235,7 +235,10 @@ public class SimpleDeviceStore
                                          DeviceId deviceId,
                                          List<PortDescription> portDescriptions) {
         Device device = devices.get(deviceId);
-        checkArgument(device != null, DEVICE_NOT_FOUND, deviceId);
+        if (device == null) {
+            log.debug("Device {} doesn't exist or hasn't been initialized yet", deviceId);
+            return Collections.emptyList();
+        }
 
         Map<ProviderId, DeviceDescriptions> descsMap = deviceDescs.get(deviceId);
         checkArgument(descsMap != null, DEVICE_NOT_FOUND, deviceId);

@@ -57,7 +57,7 @@ class RoleManager implements RoleHandler {
 
     private static Logger log = LoggerFactory.getLogger(RoleManager.class);
 
-    // The time until cached XID is evicted. Arbitray for now.
+    // The time until cached XID is evicted. Arbitrary for now.
     private final int pendingXidTimeoutSeconds = 60;
 
     // The cache for pending expected RoleReplies keyed on expected XID

@@ -127,17 +127,16 @@ public class OpenFlowDeviceProvider extends AbstractProvider implements DevicePr
     }
 
     @Override
-    public void triggerProbe(Device device) {
-        final DeviceId deviceId = device.id();
+    public void triggerProbe(DeviceId deviceId) {
         LOG.info("Triggering probe on device {}", deviceId);
 
         final Dpid dpid = dpid(deviceId.uri());
         OpenFlowSwitch sw = controller.getSwitch(dpid);
         if (sw == null || !sw.isConnected()) {
-            LOG.error("Failed to probe device {} on sw={}", device, sw);
+            LOG.error("Failed to probe device {} on sw={}", deviceId, sw);
             providerService.deviceDisconnected(deviceId);
         } else {
-            LOG.trace("Confirmed device {} connection", device);
+            LOG.trace("Confirmed device {} connection", deviceId);
             // FIXME require something like below to match javadoc description
             // but this starts infinite loop with current DeviceManager
 //            final ChassisId cId = new ChassisId(dpid.value());

@@ -240,7 +240,7 @@ class ConfigProvider implements DeviceProvider, LinkProvider, HostProvider {
     }
 
     @Override
-    public void triggerProbe(Device device) {
+    public void triggerProbe(DeviceId deviceId) {
     }
 
     @Override