[ONOS-4691] Refactoring OpticalPortOperator (2/3)

- Define ConfigOperator for a Port
- Refactor OpticalPortOperator as PortConfigOperator
- Add plug-in mechanism for PortConfigOperator on DeviceManager
- Move OpticalPortConfig, OpticalPortOperator to optical-model bundle

Change-Id: I5d416305b0c1b0e31e0ad64baa92d126303548bc

@@ -4,7 +4,7 @@ COMPILE_DEPS = [
 ]
 
 TEST_DEPS = [
-    '//lib:TEST',
+    '//lib:TEST_ADAPTERS',
 ]
 
 

@@ -47,6 +47,13 @@
 
         <dependency>
             <groupId>org.onosproject</groupId>
+            <artifactId>onos-api</artifactId>
+            <classifier>tests</classifier>
+            <scope>test</scope>
+        </dependency>
+
+        <dependency>
+            <groupId>org.onosproject</groupId>
             <artifactId>onlab-junit</artifactId>
             <scope>test</scope>
         </dependency>

@@ -13,7 +13,7 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
-package org.onosproject.net.config.basics;
+package org.onosproject.net.optical.config;
 
 import java.util.Optional;
 
@@ -30,6 +30,7 @@ import static org.onosproject.net.config.Config.FieldPresence.OPTIONAL;
  * Configurations for an optical port on a device.
  */
 public final class OpticalPortConfig extends Config<ConnectPoint> {
+
     // optical type {OMS, OCH, ODUClt, fiber}
     public static final String TYPE = "type";
 

@@ -13,17 +13,26 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
-package org.onosproject.net.device.impl;
+package org.onosproject.net.optical.config;
 
 import static org.onosproject.net.optical.device.OchPortHelper.ochPortDescription;
 import static org.onosproject.net.optical.device.OduCltPortHelper.oduCltPortDescription;
 import static org.onosproject.net.optical.device.OmsPortHelper.omsPortDescription;
 import static org.onosproject.net.optical.device.OtuPortHelper.otuPortDescription;
 import static org.slf4j.LoggerFactory.getLogger;
-import org.onosproject.net.config.ConfigOperator;
-import org.onosproject.net.config.basics.OpticalPortConfig;
+
+import java.util.Set;
+
+import static com.google.common.base.MoreObjects.firstNonNull;
+import static com.google.common.base.Preconditions.checkNotNull;
+
+import org.onosproject.net.config.NetworkConfigService;
+import org.onosproject.net.config.PortConfigOperator;
 import org.onosproject.net.AnnotationKeys;
+import org.onosproject.net.ConnectPoint;
 import org.onosproject.net.DefaultAnnotations;
+import org.onosproject.net.Port;
+import org.onosproject.net.Port.Type;
 import org.onosproject.net.PortNumber;
 import org.onosproject.net.SparseAnnotations;
 import org.onosproject.net.device.DefaultPortDescription;
@@ -34,63 +43,85 @@ import org.onosproject.net.device.OtuPortDescription;
 import org.onosproject.net.device.PortDescription;
 import org.slf4j.Logger;
 
+import com.google.common.collect.Sets;
+
 /**
  * Implementations of merge policies for various sources of optical port
  * configuration information. This includes applications, provides, and network
  * configurations.
  */
-public final class OpticalPortOperator implements ConfigOperator {
+public final class OpticalPortOperator implements PortConfigOperator {
 
     private static final Logger log = getLogger(OpticalPortOperator.class);
 
-    private OpticalPortOperator() {
+    /**
+     * Port.Type this PortConfigOperator reacts on.
+     */
+    private final Set<Port.Type> optical = Sets.immutableEnumSet(Port.Type.ODUCLT,
+                                                                 Port.Type.OMS,
+                                                                 Port.Type.OCH,
+                                                                 Port.Type.OTU,
+                                                                 Port.Type.FIBER,
+                                                                 Port.Type.PACKET);
+
+    private NetworkConfigService networkConfigService;
+
+
+    public OpticalPortOperator() {
+    }
+
+    @Override
+    public void bindService(NetworkConfigService networkConfigService) {
+        this.networkConfigService = networkConfigService;
+    }
+
+    private OpticalPortConfig lookupConfig(ConnectPoint cp) {
+        if (networkConfigService == null) {
+            return null;
+        }
+        return networkConfigService.getConfig(cp, OpticalPortConfig.class);
     }
 
     /**
      * Generates a PortDescription containing fields from a PortDescription and
      * an OpticalPortConfig.
      *
-     * @param opc the port config entity from network config
-     * @param descr a PortDescription
-     * @return PortDescription based on both sources
+     * @param cp {@link ConnectPoint} representing the port.
+     * @param descr input {@link PortDescription}
+     * @return Combined {@link PortDescription}
      */
-    public static PortDescription combine(OpticalPortConfig opc, PortDescription descr) {
+    @Override
+    public PortDescription combine(ConnectPoint cp, PortDescription descr) {
+        checkNotNull(cp);
+
+        // short-circuit for non-optical ports
+        // must be removed if we need type override
+        if (descr != null && !optical.contains(descr.type())) {
+            return descr;
+        }
+
+        OpticalPortConfig opc = lookupConfig(cp);
         if (opc == null) {
             return descr;
         }
 
-        PortNumber port = descr.portNumber();
-        final String name = opc.name();
-        final String numName = opc.numberName();
-        // if the description is null, or the current description port name != config name,
-        // create a new PortNumber.
-        PortNumber newPort = null;
-        if (port == null) {
-            // try to get the portNumber from the numName.
-            if (!numName.isEmpty()) {
-                final long pn = Long.parseLong(numName);
-                newPort = (!name.isEmpty()) ? PortNumber.portNumber(pn, name) : PortNumber.portNumber(pn);
-            } else {
-                // we don't have defining info (a port number value)
-                throw new RuntimeException("Possible misconfig, bailing on handling for: \n\t" + descr);
-            }
-        } else if ((!name.isEmpty()) && !name.equals(port.name())) {
-            final long pn = (numName.isEmpty()) ? port.toLong() : Long.parseLong(numName);
-            newPort = PortNumber.portNumber(pn, name);
-        }
-
-        // Port type won't change unless we're overwriting a port completely.
-        // Watch out for overwrites to avoid class cast craziness.
-        boolean noOwrite = opc.type() == descr.type();
-
-        SparseAnnotations sa = combine(opc, descr.annotations());
-        if (noOwrite) {
-            return updateDescription((newPort == null) ? port : newPort, sa, descr);
-        } else {
-            // TODO: must reconstruct a different type of PortDescription.
-            log.info("Type rewrite from {} to {} required", descr.type(), opc.type());
+        PortNumber number = descr.portNumber();
+        // handle PortNumber "name" portion
+        if (!opc.name().isEmpty()) {
+            number = PortNumber.portNumber(descr.portNumber().toLong(), opc.name());
         }
-        return descr;
+
+        // handle additional annotations
+        SparseAnnotations annotations = combine(opc, descr.annotations());
+
+        // (Future work) handle type overwrite?
+        Type type = firstNonNull(opc.type(), descr.type());
+        if (type != descr.type()) {
+            // TODO: Do we need to be able to overwrite Port.Type?
+            log.warn("Port type overwrite requested for {}. Ignoring.", cp);
+        }
+
+        return updateDescription(number, annotations, descr);
     }
 
     // updates a port description whose port type has not changed.
@@ -161,8 +192,9 @@ public final class OpticalPortOperator implements ConfigOperator {
      * @param an the annotation
      * @return annotation combining both sources
      */
-    public static SparseAnnotations combine(OpticalPortConfig opc, SparseAnnotations an) {
+    private static SparseAnnotations combine(OpticalPortConfig opc, SparseAnnotations an) {
         DefaultAnnotations.Builder b = DefaultAnnotations.builder();
+        b.putAll(an);
         if (!opc.staticPort().isEmpty()) {
             b.set(AnnotationKeys.STATIC_PORT, opc.staticPort());
         }
@@ -173,7 +205,8 @@ public final class OpticalPortOperator implements ConfigOperator {
         if (!opc.name().isEmpty()) {
             b.set(AnnotationKeys.PORT_NAME, opc.name());
         }
-        return DefaultAnnotations.union(an, b.build());
+        return b.build();
     }
 
+
 }

+/*
+ * Copyright 2016-present Open Networking Laboratory
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License"); you may not
+ * use this file except in compliance with the License. You may obtain a copy of
+ * the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+ * License for the specific language governing permissions and limitations under
+ * the License.
+ */
+/**
+ * Various optical model related configurations.
+ */
+package org.onosproject.net.optical.config;

+/*
+ * Copyright 2016-present Open Networking Laboratory
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.onosproject.net.optical.internal;
+
+import static org.onosproject.net.config.basics.SubjectFactories.CONNECT_POINT_SUBJECT_FACTORY;
+
+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.Reference;
+import org.apache.felix.scr.annotations.ReferenceCardinality;
+import org.onosproject.net.ConnectPoint;
+import org.onosproject.net.config.ConfigFactory;
+import org.onosproject.net.config.NetworkConfigRegistry;
+import org.onosproject.net.config.PortConfigOperatorRegistry;
+import org.onosproject.net.optical.config.OpticalPortConfig;
+import org.onosproject.net.optical.config.OpticalPortOperator;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+/**
+ * Loader which registers optical model related config, etc.
+ */
+@Component(immediate = true)
+public class OpticalModelLoader {
+
+    private final Logger log = LoggerFactory.getLogger(getClass());
+
+    @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY)
+    protected PortConfigOperatorRegistry portOperatorRegistry;
+
+    @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY)
+    protected NetworkConfigRegistry netcfgRegistry;
+
+
+    private OpticalPortOperator opticalPortOp;
+
+    private ConfigFactory<ConnectPoint, OpticalPortConfig>
+        opticalPortConfigFactory = new ConfigFactory<ConnectPoint, OpticalPortConfig>(CONNECT_POINT_SUBJECT_FACTORY,
+                                                       OpticalPortConfig.class,
+                                                       "optical") {
+        @Override
+        public OpticalPortConfig createConfig() {
+            return new OpticalPortConfig();
+        }
+    };
+
+    @Activate
+    protected void activate() {
+        netcfgRegistry.registerConfigFactory(opticalPortConfigFactory);
+
+        opticalPortOp = new OpticalPortOperator();
+        portOperatorRegistry.registerPortConfigOperator(opticalPortOp,
+                                                        OpticalPortConfig.class);
+
+        log.info("Started");
+    }
+
+    @Deactivate
+    protected void deactivate() {
+        portOperatorRegistry.unregisterPortConfigOperator(opticalPortOp);
+
+        netcfgRegistry.unregisterConfigFactory(opticalPortConfigFactory);
+        log.info("Stopped");
+    }
+}

+/*
+ * Copyright 2016-present Open Networking Laboratory
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License"); you may not
+ * use this file except in compliance with the License. You may obtain a copy of
+ * the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+ * License for the specific language governing permissions and limitations under
+ * the License.
+ */
+/**
+ * Internal tools for optical model.
+ */
+package org.onosproject.net.optical.internal;

@@ -13,15 +13,15 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
-package org.onosproject.incubator.net.config.basics;
+package org.onosproject.net.optical.config;
 
 import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertFalse;
-import static org.onosproject.net.config.basics.OpticalPortConfig.TYPE;
-import static org.onosproject.net.config.basics.OpticalPortConfig.NAME;
-import static org.onosproject.net.config.basics.OpticalPortConfig.PORT;
-import static org.onosproject.net.config.basics.OpticalPortConfig.STATIC_LAMBDA;
-import static org.onosproject.net.config.basics.OpticalPortConfig.STATIC_PORT;
+import static org.onosproject.net.optical.config.OpticalPortConfig.NAME;
+import static org.onosproject.net.optical.config.OpticalPortConfig.PORT;
+import static org.onosproject.net.optical.config.OpticalPortConfig.STATIC_LAMBDA;
+import static org.onosproject.net.optical.config.OpticalPortConfig.STATIC_PORT;
+import static org.onosproject.net.optical.config.OpticalPortConfig.TYPE;
 
 import java.io.IOException;
 import java.util.Iterator;
@@ -41,7 +41,6 @@ import com.fasterxml.jackson.databind.ObjectMapper;
 import com.fasterxml.jackson.databind.node.JsonNodeFactory;
 import com.fasterxml.jackson.databind.node.ObjectNode;
 import com.google.common.collect.Lists;
-import org.onosproject.net.config.basics.OpticalPortConfig;
 
 public class OpticalPortConfigTest {
     private static final String FIELD = "ports";

@@ -13,14 +13,14 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
-package org.onosproject.net.device.impl;
+package org.onosproject.net.optical.config;
 
 import org.junit.Before;
 import org.junit.Test;
 import org.onosproject.net.CltSignalType;
 import org.onosproject.net.config.Config;
 import org.onosproject.net.config.ConfigApplyDelegate;
-import org.onosproject.net.config.basics.OpticalPortConfig;
+import org.onosproject.net.config.NetworkConfigServiceAdapter;
 import org.onosproject.net.AnnotationKeys;
 import org.onosproject.net.ConnectPoint;
 import org.onosproject.net.DefaultAnnotations;
@@ -29,6 +29,7 @@ import org.onosproject.net.Port;
 import org.onosproject.net.PortNumber;
 import org.onosproject.net.SparseAnnotations;
 import org.onosproject.net.device.PortDescription;
+
 import com.fasterxml.jackson.databind.ObjectMapper;
 import com.fasterxml.jackson.databind.node.JsonNodeFactory;
 
@@ -62,27 +63,33 @@ public class OpticalPortOperatorTest {
 
     private static final ConnectPoint CP = new ConnectPoint(DID, UNNAMED);
 
-    private static final OpticalPortConfig OPC = new OpticalPortConfig();
+    private OpticalPortConfig opc;
+
+    private OpticalPortOperator oper;
 
     @Before
     public void setUp() {
-        OPC.init(CP, CFG_KEY, JsonNodeFactory.instance.objectNode(), mapper, delegate);
+        opc = new OpticalPortConfig();
+        opc.init(CP, CFG_KEY, JsonNodeFactory.instance.objectNode(), mapper, delegate);
+
+        oper = new OpticalPortOperator();
+        oper.bindService(new MockNetworkConfigService());
     }
 
     @Test
     public void testConfigPortName() {
-        OPC.portType(Port.Type.ODUCLT)
+        opc.portType(Port.Type.ODUCLT)
             .portNumberName(PORT_NUMBER)
             .portName(CFG_PORT_NAME);
 
         PortDescription res;
         // full desc + opc with name
-        res = OpticalPortOperator.combine(OPC, N_DESC);
+        res = oper.combine(CP, N_DESC);
         assertEquals("Configured port name expected",
                      CFG_PORT_NAME, res.portNumber().name());
         assertEquals(DESC_STATIC_PORT, res.annotations().value(AnnotationKeys.STATIC_PORT));
 
-        res = OpticalPortOperator.combine(OPC, U_DESC);
+        res = oper.combine(CP, U_DESC);
         assertEquals("Configured port name expected",
                      CFG_PORT_NAME, res.portNumber().name());
         assertEquals(DESC_STATIC_PORT, res.annotations().value(AnnotationKeys.STATIC_PORT));
@@ -90,12 +97,12 @@ public class OpticalPortOperatorTest {
 
     @Test
     public void testConfigAddStaticLambda() {
-        OPC.portType(Port.Type.ODUCLT)
+        opc.portType(Port.Type.ODUCLT)
             .portNumberName(PORT_NUMBER)
             .staticLambda(CFG_STATIC_LAMBDA);
 
         PortDescription res;
-        res = OpticalPortOperator.combine(OPC, N_DESC);
+        res = oper.combine(CP, N_DESC);
         assertEquals("Original port name expected",
                      DESC_PORT_NAME, res.portNumber().name());
         assertEquals(DESC_STATIC_PORT, res.annotations().value(AnnotationKeys.STATIC_PORT));
@@ -105,17 +112,31 @@ public class OpticalPortOperatorTest {
 
     @Test
     public void testEmptyConfig() {
-        OPC.portType(Port.Type.ODUCLT)
+        opc.portType(Port.Type.ODUCLT)
             .portNumberName(PORT_NUMBER);
 
         PortDescription res;
-        res = OpticalPortOperator.combine(OPC, N_DESC);
+        res = oper.combine(CP, N_DESC);
         assertEquals("Configured port name expected",
                      DESC_PORT_NAME, res.portNumber().name());
         assertEquals(DESC_STATIC_PORT, res.annotations().value(AnnotationKeys.STATIC_PORT));
     }
 
 
+    private class MockNetworkConfigService
+            extends NetworkConfigServiceAdapter {
+
+        @Override
+        public <S, C extends Config<S>> C getConfig(S subject,
+                                                    Class<C> configClass) {
+            if (configClass == OpticalPortConfig.class) {
+                return (C) opc;
+            }
+            return null;
+        }
+    }
+
+
     private class MockCfgDelegate implements ConfigApplyDelegate {
 
         @Override

+/*
+ * Copyright 2016-present Open Networking Laboratory
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.onosproject.net.config;
+
+import org.onosproject.net.ConnectPoint;
+import org.onosproject.net.DeviceId;
+import org.onosproject.net.device.PortDescription;
+
+import com.google.common.annotations.Beta;
+
+/**
+ * {@link ConfigOperator} for Port.
+ * <p>
+ * Note: We currently assumes {@link PortConfigOperator}s are commutative.
+ */
+@Beta
+public interface PortConfigOperator extends ConfigOperator {
+
+    /**
+     * Binds {@link NetworkConfigService} to use for retrieving configuration.
+     *
+     * @param networkConfigService the service to use
+     */
+    void bindService(NetworkConfigService networkConfigService);
+
+
+    /**
+     * Generates a PortDescription containing fields from a PortDescription and
+     * configuration.
+     *
+     * @param cp {@link ConnectPoint} representing the port.
+     * @param descr input {@link PortDescription}
+     * @return Combined {@link PortDescription}
+     */
+    PortDescription combine(ConnectPoint cp, PortDescription descr);
+
+    /**
+     * Generates a PortDescription containing fields from a PortDescription and
+     * configuration.
+     *
+     * @param did DeviceId which the port described by {@code descr} resides.
+     * @param descr input {@link PortDescription}
+     * @return Combined {@link PortDescription}
+     */
+    default PortDescription combine(DeviceId did, PortDescription descr) {
+        return combine(new ConnectPoint(did, descr.portNumber()), descr);
+    }
+
+}

+/*
+ * Copyright 2016-present Open Networking Laboratory
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License"); you may not
+ * use this file except in compliance with the License. You may obtain a copy of
+ * the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+ * License for the specific language governing permissions and limitations under
+ * the License.
+ */
+package org.onosproject.net.config;
+
+import org.onosproject.net.ConnectPoint;
+
+import com.google.common.annotations.Beta;
+
+/**
+ * Abstraction of a port operator registry.
+ */
+@Beta
+public interface PortConfigOperatorRegistry {
+
+    /**
+     * Registers {@link PortConfigOperator} instance.
+     *
+     * @param portOp {@link PortConfigOperator} instance.
+     * @param configs {@link Config} class for a Port referred by {@code portOp}
+     */
+    void registerPortConfigOperator(PortConfigOperator portOp,
+                                    Class<? extends Config<ConnectPoint>>... configs);
+
+    /**
+     * Unregisters {@link PortConfigOperator} instance.
+     *
+     * @param portOp {@link PortConfigOperator} instance.
+     */
+    void unregisterPortConfigOperator(PortConfigOperator portOp);
+
+}

@@ -105,9 +105,7 @@
         </dependency>
 
         <!-- TODO Remove after decoupling optical -->
-        <!-- - DeviceManager.InternalDeviceProviderService#ensureGeneric -->
         <!-- - OpticalCompilers x4 -->
-        <!-- - OpticalPortOperator -->
         <dependency>
             <groupId>org.onosproject</groupId>
             <artifactId>onos-optical-model</artifactId>

@@ -34,7 +34,6 @@ import org.onosproject.net.config.NetworkConfigRegistry;
 import org.onosproject.net.config.basics.BasicDeviceConfig;
 import org.onosproject.net.config.basics.BasicHostConfig;
 import org.onosproject.net.config.basics.BasicLinkConfig;
-import org.onosproject.net.config.basics.OpticalPortConfig;
 import org.onosproject.net.config.basics.SubjectFactories;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
@@ -85,15 +84,6 @@ public class BasicNetworkConfigs implements BasicNetworkConfigService {
                 public BasicLinkConfig createConfig() {
                     return new BasicLinkConfig();
                 }
-            },
-            // TODO move this optical specific configuration out to optical app
-            new ConfigFactory<ConnectPoint, OpticalPortConfig>(CONNECT_POINT_SUBJECT_FACTORY,
-                                                               OpticalPortConfig.class,
-                                                               "optical") {
-                @Override
-                public OpticalPortConfig createConfig() {
-                    return new OpticalPortConfig();
-                }
             }
     );
 

@@ -19,19 +19,22 @@ import java.util.Collection;
 import java.util.HashSet;
 import java.util.List;
 import java.util.Objects;
+import java.util.Optional;
 import java.util.Set;
 import java.util.concurrent.CompletableFuture;
+import java.util.concurrent.ConcurrentHashMap;
+import java.util.concurrent.CopyOnWriteArrayList;
 import java.util.concurrent.ExecutionException;
 import java.util.concurrent.ScheduledExecutorService;
 import java.util.concurrent.TimeUnit;
 import java.util.stream.Collectors;
-
 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.Reference;
 import org.apache.felix.scr.annotations.ReferenceCardinality;
 import org.apache.felix.scr.annotations.Service;
+import org.onlab.util.Tools;
 import org.onosproject.cluster.ClusterService;
 import org.onosproject.cluster.NodeId;
 import org.onosproject.mastership.MastershipEvent;
@@ -46,11 +49,13 @@ import org.onosproject.net.DeviceId;
 import org.onosproject.net.MastershipRole;
 import org.onosproject.net.Port;
 import org.onosproject.net.PortNumber;
+import org.onosproject.net.config.Config;
 import org.onosproject.net.config.NetworkConfigEvent;
 import org.onosproject.net.config.NetworkConfigListener;
 import org.onosproject.net.config.NetworkConfigService;
+import org.onosproject.net.config.PortConfigOperator;
+import org.onosproject.net.config.PortConfigOperatorRegistry;
 import org.onosproject.net.config.basics.BasicDeviceConfig;
-import org.onosproject.net.config.basics.OpticalPortConfig;
 import org.onosproject.net.device.DefaultPortDescription;
 import org.onosproject.net.device.DeviceAdminService;
 import org.onosproject.net.device.DeviceDescription;
@@ -62,29 +67,23 @@ import org.onosproject.net.device.DeviceProviderService;
 import org.onosproject.net.device.DeviceService;
 import org.onosproject.net.device.DeviceStore;
 import org.onosproject.net.device.DeviceStoreDelegate;
-import org.onosproject.net.device.OchPortDescription;
-import org.onosproject.net.device.OduCltPortDescription;
-import org.onosproject.net.device.OmsPortDescription;
-import org.onosproject.net.device.OtuPortDescription;
 import org.onosproject.net.device.PortDescription;
 import org.onosproject.net.device.PortStatistics;
-import org.onosproject.net.optical.device.OmsPortHelper;
-import org.onosproject.net.optical.device.OtuPortHelper;
 import org.onosproject.net.provider.AbstractListenerProviderRegistry;
 import org.onosproject.net.provider.AbstractProviderService;
-import org.onosproject.net.provider.Provider;
 import org.slf4j.Logger;
 
+import com.google.common.collect.Multimap;
 import com.google.common.util.concurrent.Futures;
 
 import static com.google.common.base.Preconditions.checkNotNull;
+import static com.google.common.collect.Multimaps.newListMultimap;
+import static com.google.common.collect.Multimaps.synchronizedListMultimap;
 import static java.util.concurrent.Executors.newSingleThreadScheduledExecutor;
 import static org.onlab.util.Tools.groupedThreads;
 import static org.onosproject.net.MastershipRole.MASTER;
 import static org.onosproject.net.MastershipRole.NONE;
 import static org.onosproject.net.MastershipRole.STANDBY;
-import static org.onosproject.net.optical.device.OchPortHelper.ochPortDescription;
-import static org.onosproject.net.optical.device.OduCltPortHelper.oduCltPortDescription;
 import static org.onosproject.security.AppGuard.checkPermission;
 import static org.onosproject.security.AppPermission.Type.DEVICE_READ;
 import static org.slf4j.LoggerFactory.getLogger;
@@ -96,7 +95,7 @@ import static org.slf4j.LoggerFactory.getLogger;
 @Service
 public class DeviceManager
         extends AbstractListenerProviderRegistry<DeviceEvent, DeviceListener, DeviceProvider, DeviceProviderService>
-        implements DeviceService, DeviceAdminService, DeviceProviderRegistry {
+        implements DeviceService, DeviceAdminService, DeviceProviderRegistry, PortConfigOperatorRegistry {
 
     private static final String DEVICE_ID_NULL = "Device ID cannot be null";
     private static final String PORT_NUMBER_NULL = "Port number cannot be null";
@@ -130,6 +129,20 @@ public class DeviceManager
     @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY)
     protected NetworkConfigService networkConfigService;
 
+
+    /**
+     * List of all registered PortConfigOperator.
+     */
+    private final List<PortConfigOperator> portOps = new CopyOnWriteArrayList<>();
+
+    /**
+     * Index to look up PortConfigOperator from Config each PortConfigOperator uses.
+     */
+    private final Multimap<Class<? extends Config<ConnectPoint>>, PortConfigOperator> portOpsIndex
+        = synchronizedListMultimap(
+           newListMultimap(new ConcurrentHashMap<>(), CopyOnWriteArrayList::new));
+
+
     @Activate
     public void activate() {
         backgroundService = newSingleThreadScheduledExecutor(
@@ -445,60 +458,6 @@ public class DeviceManager
             }
         }
 
-        /**
-         * Transforms optical specific PortDescription to generic PortDescription.
-         *
-         * @param descr PortDescription
-         * @return generic PortDescription
-         * @deprecated in Goldeneye (1.6.0)
-         */
-        @Deprecated
-        private PortDescription ensureGeneric(PortDescription descr) {
-            switch (descr.type()) {
-            case OCH:
-                if (descr instanceof OchPortDescription) {
-                    OchPortDescription och = (OchPortDescription) descr;
-                    return ochPortDescription(och,
-                                              och.signalType(),
-                                              och.isTunable(),
-                                              och.lambda(),
-                                              och.annotations());
-                }
-                break;
-            case ODUCLT:
-                if (descr instanceof OduCltPortDescription) {
-                    OduCltPortDescription clt = (OduCltPortDescription) descr;
-                    return oduCltPortDescription(clt,
-                                                 clt.signalType(),
-                                                 clt.annotations());
-                }
-                break;
-            case OMS:
-                if (descr instanceof OmsPortDescription) {
-                    OmsPortDescription oms = (OmsPortDescription) descr;
-                    return OmsPortHelper.omsPortDescription(oms,
-                                                            oms.minFrequency(),
-                                                            oms.maxFrequency(),
-                                                            oms.grid(),
-                                                            oms.annotations());
-                }
-                break;
-            case OTU:
-                if (descr instanceof OtuPortDescription) {
-                    OtuPortDescription otu = (OtuPortDescription) descr;
-                    return OtuPortHelper.otuPortDescription(otu,
-                                                            otu.signalType(),
-                                                            otu.annotations());
-                }
-                break;
-
-            default:
-                // no-op
-                break;
-            }
-            return descr;
-        }
-
         @Override
         public void updatePorts(DeviceId deviceId,
                                 List<PortDescription> portDescriptions) {
@@ -512,8 +471,7 @@ public class DeviceManager
                 return;
             }
             portDescriptions = portDescriptions.stream()
-                    .map(e -> consolidate(deviceId, e))
-                    .map(this::ensureGeneric)
+                    .map(e -> applyAllPortOps(deviceId, e))
                     .collect(Collectors.toList());
             List<DeviceEvent> events = store.updatePorts(this.provider().id(),
                                                          deviceId, portDescriptions);
@@ -552,30 +510,16 @@ public class DeviceManager
                                                          portDescription.isEnabled());
             }
 
-            portDescription = consolidate(deviceId, portDescription);
+            portDescription = applyAllPortOps(deviceId, portDescription);
             final DeviceEvent event = store.updatePortStatus(this.provider().id(),
                                                              deviceId,
-                                                             ensureGeneric(portDescription));
+                                                             portDescription);
             if (event != null) {
                 log.info("Device {} port {} status changed", deviceId, event.port().number());
                 post(event);
             }
         }
 
-        // merges the appropriate PortConfig with the description.
-        private PortDescription consolidate(DeviceId did, PortDescription desc) {
-            switch (desc.type()) {
-                case COPPER:
-                case VIRTUAL:
-                    return desc;
-                default:
-                    // TODO: add plugin mechanism in order to decouple this
-                    OpticalPortConfig opc = networkConfigService.getConfig(
-                            new ConnectPoint(did, desc.portNumber()), OpticalPortConfig.class);
-                    return OpticalPortOperator.combine(opc, desc);
-            }
-        }
-
         @Override
         public void receivedRoleReply(DeviceId deviceId, MastershipRole requested,
                                       MastershipRole response) {
@@ -835,7 +779,7 @@ public class DeviceManager
             return (event.type() == NetworkConfigEvent.Type.CONFIG_ADDED
                     || event.type() == NetworkConfigEvent.Type.CONFIG_UPDATED)
                     && (event.configClass().equals(BasicDeviceConfig.class)
-                        || event.configClass().equals(OpticalPortConfig.class));
+                        || portOpsIndex.containsKey(event.configClass()));
         }
 
         @Override
@@ -857,20 +801,17 @@ public class DeviceManager
                     }
                 }
             }
-            if (event.configClass().equals(OpticalPortConfig.class)) {
+            if (portOpsIndex.containsKey(event.configClass())) {
                 ConnectPoint cpt = (ConnectPoint) event.subject();
                 DeviceId did = cpt.deviceId();
-                Provider provider = getProvider(did);
-                Port dpt = getPort(did, cpt.port());
 
-                if (dpt != null && provider != null) {
-                    OpticalPortConfig opc = networkConfigService.getConfig(cpt, OpticalPortConfig.class);
-                    PortDescription desc = store.getPortDescription(provider.id(), did, cpt.port());
-                    desc = OpticalPortOperator.combine(opc, desc);
-                    if (desc != null) {
-                        de = store.updatePortStatus(getProvider(did).id(), did, desc);
-                    }
-                }
+                // Note: assuming PortOperator can modify existing port,
+                //       but cannot add new port purely from Config.
+                de = Optional.ofNullable(getProvider(did))
+                        .map(provider -> store.getPortDescription(provider.id(), did, cpt.port()))
+                        .map(desc -> applyAllPortOps(cpt, desc))
+                        .map(desc -> store.updatePortStatus(getProvider(did).id(), did, desc))
+                        .orElse(null);
             }
 
             if (de != null) {
@@ -888,4 +829,78 @@ public class DeviceManager
         }
     }
 
+    @Override
+    @SafeVarargs
+    public final void registerPortConfigOperator(PortConfigOperator portOp,
+                                                              Class<? extends Config<ConnectPoint>>...configs) {
+        checkNotNull(portOp);
+
+        portOp.bindService(networkConfigService);
+
+        // update both portOpsIndex and portOps
+        synchronized (portOpsIndex) {
+            for (Class<? extends Config<ConnectPoint>> config : configs) {
+                portOpsIndex.put(config, portOp);
+            }
+
+            portOps.add(portOp);
+        }
+
+        // TODO: Should we be applying to all existing Ports?
+        Tools.stream(store.getAvailableDevices())
+            .map(Device::id)
+            .filter(mastershipService::isLocalMaster)
+            // for each locally managed Device, update all port descriptions
+            .map(did -> {
+                List<PortDescription> pds
+                    = store.getPortDescriptions(getProvider(did).id(), did)
+                        .map(pdesc -> applyAllPortOps(did, pdesc))
+                        .collect(Collectors.toList());
+                return store.updatePorts(getProvider(did).id(), did, pds);
+                })
+            // ..and port port update event if necessary
+            .forEach(evts -> evts.forEach(this::post));
+    }
+
+    @Override
+    public void unregisterPortConfigOperator(PortConfigOperator portOp) {
+        checkNotNull(portOp);
+
+
+        // remove all portOp
+        synchronized (portOpsIndex) {
+            portOps.remove(portOp);
+
+            // had to do this since COWArrayList iterator doesn't support remove
+            portOpsIndex.keySet().forEach(key -> portOpsIndex.remove(key, portOp));
+        }
+
+    }
+
+    /**
+     * Merges the appropriate PortConfig with the description.
+     *
+     * @param did  ID of the Device where the port is attached
+     * @param desc {@link PortDescription}
+     * @return merged {@link PortDescription}
+     */
+    private PortDescription applyAllPortOps(DeviceId did, PortDescription desc) {
+        return applyAllPortOps(new ConnectPoint(did, desc.portNumber()), desc);
+    }
+
+    /**
+     * Merges the appropriate PortConfig with the description.
+     *
+     * @param cpt   ConnectPoint where the port is attached
+     * @param desc  {@link PortDescription}
+     * @return merged {@link PortDescription}
+     */
+    private PortDescription applyAllPortOps(ConnectPoint cpt, PortDescription desc) {
+        PortDescription work = desc;
+        for (PortConfigOperator portOp : portOps) {
+            work = portOp.combine(cpt, work);
+        }
+        return work;
+    }
+
 }