diff --git a/apps/portloadbalancer/src/main/java/org/onosproject/portloadbalancer/app/PortLoadBalancerManager.java b/apps/portloadbalancer/src/main/java/org/onosproject/portloadbalancer/app/PortLoadBalancerManager.java
new file mode 100644
index 0000000..ed59699
--- /dev/null
+++ b/apps/portloadbalancer/src/main/java/org/onosproject/portloadbalancer/app/PortLoadBalancerManager.java
@@ -0,0 +1,633 @@
+/*
+ * Copyright 2018-present Open Networking Foundation
+ *
+ * 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.portloadbalancer.app;
+
+import com.google.common.collect.ImmutableMap;
+import com.google.common.collect.Sets;
+import org.osgi.service.component.annotations.Activate;
+import org.osgi.service.component.annotations.Component;
+import org.osgi.service.component.annotations.Deactivate;
+import org.osgi.service.component.annotations.Reference;
+import org.osgi.service.component.annotations.ReferenceCardinality;
+import org.onlab.util.KryoNamespace;
+import org.onosproject.cluster.ClusterService;
+import org.onosproject.cluster.LeadershipService;
+import org.onosproject.cluster.NodeId;
+import org.onosproject.core.ApplicationId;
+import org.onosproject.core.CoreService;
+import org.onosproject.portloadbalancer.api.PortLoadBalancer;
+import org.onosproject.portloadbalancer.api.PortLoadBalancerData;
+import org.onosproject.portloadbalancer.api.PortLoadBalancerEvent;
+import org.onosproject.portloadbalancer.api.PortLoadBalancerAdminService;
+import org.onosproject.portloadbalancer.api.PortLoadBalancerId;
+import org.onosproject.portloadbalancer.api.PortLoadBalancerListener;
+import org.onosproject.portloadbalancer.api.PortLoadBalancerMode;
+import org.onosproject.portloadbalancer.api.PortLoadBalancerService;
+import org.onosproject.mastership.MastershipService;
+import org.onosproject.net.DeviceId;
+import org.onosproject.net.PortNumber;
+import org.onosproject.net.device.DeviceEvent;
+import org.onosproject.net.device.DeviceListener;
+import org.onosproject.net.device.DeviceService;
+import org.onosproject.net.flow.DefaultTrafficSelector;
+import org.onosproject.net.flow.DefaultTrafficTreatment;
+import org.onosproject.net.flow.TrafficSelector;
+import org.onosproject.net.flow.TrafficTreatment;
+import org.onosproject.net.flow.instructions.Instruction;
+import org.onosproject.net.flow.instructions.Instructions;
+import org.onosproject.net.flowobjective.DefaultNextObjective;
+import org.onosproject.net.flowobjective.DefaultNextTreatment;
+import org.onosproject.net.flowobjective.FlowObjectiveService;
+import org.onosproject.net.flowobjective.NextObjective;
+import org.onosproject.net.flowobjective.Objective;
+import org.onosproject.net.flowobjective.ObjectiveContext;
+import org.onosproject.net.flowobjective.ObjectiveError;
+import org.onosproject.store.serializers.KryoNamespaces;
+import org.onosproject.store.service.ConsistentMap;
+import org.onosproject.store.service.MapEvent;
+import org.onosproject.store.service.MapEventListener;
+import org.onosproject.store.service.Serializer;
+import org.onosproject.store.service.StorageService;
+import org.onosproject.store.service.Versioned;
+import org.slf4j.Logger;
+
+import java.util.Collection;
+import java.util.Map;
+import java.util.Set;
+import java.util.concurrent.ExecutorService;
+import java.util.concurrent.Executors;
+import java.util.stream.Collectors;
+
+import static org.onlab.util.Tools.groupedThreads;
+import static org.slf4j.LoggerFactory.getLogger;
+
+@Component(
+        immediate = true,
+        service = { PortLoadBalancerService.class, PortLoadBalancerAdminService.class }
+)
+public class PortLoadBalancerManager implements PortLoadBalancerService, PortLoadBalancerAdminService {
+
+    @Reference(cardinality = ReferenceCardinality.MANDATORY)
+    private CoreService coreService;
+
+    @Reference(cardinality = ReferenceCardinality.MANDATORY)
+    private StorageService storageService;
+
+    @Reference(cardinality = ReferenceCardinality.MANDATORY)
+    private FlowObjectiveService flowObjService;
+
+    @Reference(cardinality = ReferenceCardinality.MANDATORY)
+    private MastershipService mastershipService;
+
+    @Reference(cardinality = ReferenceCardinality.MANDATORY)
+    private LeadershipService leadershipService;
+
+    @Reference(cardinality = ReferenceCardinality.MANDATORY)
+    private ClusterService clusterService;
+
+    @Reference(cardinality = ReferenceCardinality.MANDATORY)
+    private DeviceService deviceService;
+
+    private static final Logger log = getLogger(PortLoadBalancerManager.class);
+    private static final String APP_NAME = "org.onosproject.portloadbalancer";
+
+    private ApplicationId appId;
+    private ConsistentMap<PortLoadBalancerId, PortLoadBalancer> portLoadBalancerStore;
+    private ConsistentMap<PortLoadBalancerId, Integer> portLoadBalancerNextStore;
+    // TODO Evaluate if ResourceService is a better option
+    private ConsistentMap<PortLoadBalancerId, ApplicationId> portLoadBalancerResStore;
+    private Set<PortLoadBalancerListener> listeners = Sets.newConcurrentHashSet();
+
+    private ExecutorService portLoadBalancerEventExecutor;
+    private ExecutorService portLoadBalancerProvExecutor;
+    private ExecutorService deviceEventExecutor;
+
+    private MapEventListener<PortLoadBalancerId, PortLoadBalancer> portLoadBalancerStoreListener;
+    // TODO build CLI to view and clear the next store
+    private MapEventListener<PortLoadBalancerId, Integer> portLoadBalancerNextStoreListener;
+    private MapEventListener<PortLoadBalancerId, ApplicationId> portLoadBalancerResStoreListener;
+    private final DeviceListener deviceListener = new InternalDeviceListener();
+
+    @Activate
+    public void activate() {
+        appId = coreService.registerApplication(APP_NAME);
+
+        portLoadBalancerEventExecutor = Executors.newSingleThreadExecutor(
+                groupedThreads("portloadbalancer-event", "%d", log));
+        portLoadBalancerProvExecutor = Executors.newSingleThreadExecutor(
+                groupedThreads("portloadbalancer-prov", "%d", log));
+        deviceEventExecutor = Executors.newSingleThreadScheduledExecutor(
+                groupedThreads("portloadbalancer-dev-event", "%d", log));
+        portLoadBalancerStoreListener = new PortLoadBalancerStoreListener();
+        portLoadBalancerNextStoreListener = new PortLoadBalancerNextStoreListener();
+        portLoadBalancerResStoreListener = new PortLoadBalancerResStoreListener();
+
+        KryoNamespace serializer = KryoNamespace.newBuilder()
+                .register(KryoNamespaces.API)
+                .register(PortLoadBalancer.class)
+                .register(PortLoadBalancerId.class)
+                .register(PortLoadBalancerMode.class)
+                .build();
+        portLoadBalancerStore = storageService.<PortLoadBalancerId, PortLoadBalancer>consistentMapBuilder()
+                .withName("onos-portloadbalancer-store")
+                .withRelaxedReadConsistency()
+                .withSerializer(Serializer.using(serializer))
+                .build();
+        portLoadBalancerStore.addListener(portLoadBalancerStoreListener);
+        portLoadBalancerNextStore = storageService.<PortLoadBalancerId, Integer>consistentMapBuilder()
+                .withName("onos-portloadbalancer-next-store")
+                .withRelaxedReadConsistency()
+                .withSerializer(Serializer.using(serializer))
+                .build();
+        portLoadBalancerNextStore.addListener(portLoadBalancerNextStoreListener);
+        portLoadBalancerResStore = storageService.<PortLoadBalancerId, ApplicationId>consistentMapBuilder()
+                .withName("onos-portloadbalancer-res-store")
+                .withRelaxedReadConsistency()
+                .withSerializer(Serializer.using(serializer))
+                .build();
+        portLoadBalancerResStore.addListener(portLoadBalancerResStoreListener);
+
+        deviceService.addListener(deviceListener);
+
+        log.info("Started");
+    }
+
+    @Deactivate
+    public void deactivate() {
+        portLoadBalancerStore.removeListener(portLoadBalancerStoreListener);
+        portLoadBalancerNextStore.removeListener(portLoadBalancerNextStoreListener);
+
+        portLoadBalancerEventExecutor.shutdown();
+        portLoadBalancerProvExecutor.shutdown();
+        deviceEventExecutor.shutdown();
+
+        log.info("Stopped");
+    }
+
+    @Override
+    public void addListener(PortLoadBalancerListener listener) {
+        listeners.add(listener);
+    }
+
+    @Override
+    public void removeListener(PortLoadBalancerListener listener) {
+        listeners.remove(listener);
+    }
+
+    @Override
+    public PortLoadBalancer createOrUpdate(PortLoadBalancerId portLoadBalancerId, Set<PortNumber> ports,
+                                           PortLoadBalancerMode mode) {
+        log.debug("Putting {} -> {} {} into port load balancer store", portLoadBalancerId, mode, ports);
+        return Versioned.valueOrNull(portLoadBalancerStore.put(portLoadBalancerId,
+                new PortLoadBalancer(portLoadBalancerId, ports, mode)));
+    }
+
+    @Override
+    public PortLoadBalancer remove(PortLoadBalancerId portLoadBalancerId) {
+        ApplicationId reservation = Versioned.valueOrNull(portLoadBalancerResStore.get(portLoadBalancerId));
+        // Remove only if it is not used - otherwise it is necessary to release first
+        if (reservation == null) {
+            log.debug("Removing {} from port load balancer store", portLoadBalancerId);
+            return Versioned.valueOrNull(portLoadBalancerStore.remove(portLoadBalancerId));
+        }
+        log.warn("Removal {} from port load balancer store was not possible " +
+                          "due to a previous reservation", portLoadBalancerId);
+        return null;
+    }
+
+    @Override
+    public Map<PortLoadBalancerId, PortLoadBalancer> getPortLoadBalancers() {
+        return ImmutableMap.copyOf(portLoadBalancerStore.asJavaMap());
+    }
+
+    @Override
+    public PortLoadBalancer getPortLoadBalancer(PortLoadBalancerId portLoadBalancerId) {
+        return Versioned.valueOrNull(portLoadBalancerStore.get(portLoadBalancerId));
+    }
+
+    @Override
+    public Map<PortLoadBalancerId, Integer> getPortLoadBalancerNexts() {
+        return ImmutableMap.copyOf(portLoadBalancerNextStore.asJavaMap());
+    }
+
+    @Override
+    public int getPortLoadBalancerNext(PortLoadBalancerId portLoadBalancerId) {
+        return Versioned.valueOrNull(portLoadBalancerNextStore.get(portLoadBalancerId));
+    }
+
+    @Override
+    public boolean reserve(PortLoadBalancerId portLoadBalancerId, ApplicationId appId) {
+        // Check if the resource is available
+        ApplicationId reservation = Versioned.valueOrNull(portLoadBalancerResStore.get(portLoadBalancerId));
+        PortLoadBalancer portLoadBalancer = Versioned.valueOrNull(portLoadBalancerStore.get(portLoadBalancerId));
+        if (reservation == null && portLoadBalancer != null) {
+            log.debug("Reserving {} -> {} into port load balancer reservation store", portLoadBalancerId, appId);
+            return portLoadBalancerResStore.put(portLoadBalancerId, appId) == null;
+        } else if (reservation != null && reservation.equals(appId)) {
+            // App try to reserve the resource a second time
+            log.debug("Already reserved {} -> {} skip reservation", portLoadBalancerId, appId);
+            return true;
+        }
+        log.warn("Reservation failed {} -> {}", portLoadBalancerId, appId);
+        return false;
+    }
+
+    @Override
+    public boolean release(PortLoadBalancerId portLoadBalancerId, ApplicationId appId) {
+        // Check if the resource is reserved
+        ApplicationId reservation = Versioned.valueOrNull(portLoadBalancerResStore.get(portLoadBalancerId));
+        if (reservation != null && reservation.equals(appId)) {
+            log.debug("Removing {} -> {} from port load balancer reservation store", portLoadBalancerId, appId);
+            return portLoadBalancerResStore.remove(portLoadBalancerId) != null;
+        }
+        log.warn("Release failed {} -> {}", portLoadBalancerId, appId);
+        return false;
+    }
+
+    @Override
+    public ApplicationId getReservation(PortLoadBalancerId portLoadBalancerId) {
+        return Versioned.valueOrNull(portLoadBalancerResStore.get(portLoadBalancerId));
+    }
+
+    @Override
+    public Map<PortLoadBalancerId, ApplicationId> getReservations() {
+        return portLoadBalancerResStore.asJavaMap();
+    }
+
+    private class PortLoadBalancerStoreListener implements MapEventListener<PortLoadBalancerId, PortLoadBalancer> {
+        public void event(MapEvent<PortLoadBalancerId, PortLoadBalancer> event) {
+            switch (event.type()) {
+                case INSERT:
+                    log.debug("PortLoadBalancer {} insert new={}, old={}", event.key(), event.newValue(),
+                            event.oldValue());
+                    post(new PortLoadBalancerEvent(PortLoadBalancerEvent.Type.ADDED, event.newValue().value().data(),
+                            null));
+                    populatePortLoadBalancer(event.newValue().value());
+                    break;
+                case REMOVE:
+                    log.debug("PortLoadBalancer {} remove new={}, old={}", event.key(), event.newValue(),
+                            event.oldValue());
+                    post(new PortLoadBalancerEvent(PortLoadBalancerEvent.Type.REMOVED, null,
+                            event.oldValue().value().data()));
+                    revokePortLoadBalancer(event.oldValue().value());
+                    break;
+                case UPDATE:
+                    log.debug("PortLoadBalancer {} update new={}, old={}", event.key(), event.newValue(),
+                            event.oldValue());
+                    post(new PortLoadBalancerEvent(PortLoadBalancerEvent.Type.UPDATED, event.newValue().value().data(),
+                            event.oldValue().value().data()));
+                    updatePortLoadBalancer(event.newValue().value(), event.oldValue().value());
+                    break;
+                default:
+                    break;
+            }
+        }
+    }
+
+    private class PortLoadBalancerNextStoreListener implements MapEventListener<PortLoadBalancerId, Integer> {
+        public void event(MapEvent<PortLoadBalancerId, Integer> event) {
+            switch (event.type()) {
+                case INSERT:
+                    log.debug("PortLoadBalancer next {} insert new={}, old={}", event.key(), event.newValue(),
+                            event.oldValue());
+                    break;
+                case REMOVE:
+                    log.debug("PortLoadBalancer next {} remove new={}, old={}", event.key(), event.newValue(),
+                            event.oldValue());
+                    break;
+                case UPDATE:
+                    log.debug("PortLoadBalancer next {} update new={}, old={}", event.key(), event.newValue(),
+                            event.oldValue());
+                    break;
+                default:
+                    break;
+            }
+        }
+    }
+
+    private class PortLoadBalancerResStoreListener implements MapEventListener<PortLoadBalancerId, ApplicationId> {
+        public void event(MapEvent<PortLoadBalancerId, ApplicationId> event) {
+            switch (event.type()) {
+                case INSERT:
+                    log.debug("PortLoadBalancer reservation {} insert new={}, old={}", event.key(), event.newValue(),
+                              event.oldValue());
+                    break;
+                case REMOVE:
+                    log.debug("PortLoadBalancer reservation {} remove new={}, old={}", event.key(), event.newValue(),
+                              event.oldValue());
+                    break;
+                case UPDATE:
+                    log.debug("PortLoadBalancer reservation {} update new={}, old={}", event.key(), event.newValue(),
+                              event.oldValue());
+                    break;
+                default:
+                    break;
+            }
+        }
+    }
+
+    private class InternalDeviceListener implements DeviceListener {
+        // We want to manage only a subset of events and if we are the leader
+        @Override
+        public void event(DeviceEvent event) {
+            deviceEventExecutor.execute(() -> {
+                DeviceId deviceId = event.subject().id();
+                if (!isLocalLeader(deviceId)) {
+                    log.debug("Not the leader of {}. Skip event {}", deviceId, event);
+                    return;
+                }
+                // Populate or revoke according to the device availability
+                if (deviceService.isAvailable(deviceId)) {
+                    init(deviceId);
+                } else {
+                    cleanup(deviceId);
+                }
+            });
+        }
+        // Some events related to the devices are skipped
+        @Override
+        public boolean isRelevant(DeviceEvent event) {
+            return event.type() == DeviceEvent.Type.DEVICE_ADDED ||
+                    event.type() == DeviceEvent.Type.DEVICE_AVAILABILITY_CHANGED ||
+                    event.type() == DeviceEvent.Type.DEVICE_UPDATED;
+        }
+    }
+
+    private void post(PortLoadBalancerEvent portLoadBalancerEvent) {
+        portLoadBalancerEventExecutor.execute(() -> {
+            for (PortLoadBalancerListener l : listeners) {
+                if (l.isRelevant(portLoadBalancerEvent)) {
+                    l.event(portLoadBalancerEvent);
+                }
+            }
+        });
+    }
+
+    private void init(DeviceId deviceId) {
+        portLoadBalancerStore.entrySet().stream()
+                .filter(portLoadBalancerEntry -> portLoadBalancerEntry.getKey().deviceId().equals(deviceId))
+                .forEach(portLoadBalancerEntry -> populatePortLoadBalancer(portLoadBalancerEntry.getValue().value()));
+    }
+
+    private void cleanup(DeviceId deviceId) {
+        portLoadBalancerStore.entrySet().stream()
+                .filter(entry -> entry.getKey().deviceId().equals(deviceId))
+                .forEach(entry -> portLoadBalancerNextStore.remove(entry.getKey()));
+        log.debug("{} is removed from portLoadBalancerNextStore", deviceId);
+    }
+
+    private void populatePortLoadBalancer(PortLoadBalancer portLoadBalancer) {
+        DeviceId deviceId = portLoadBalancer.portLoadBalancerId().deviceId();
+        if (!isLocalLeader(deviceId)) {
+            log.debug("Not the leader of {}. Skip populatePortLoadBalancer {}", deviceId,
+                    portLoadBalancer.portLoadBalancerId());
+            return;
+        }
+
+        portLoadBalancerProvExecutor.execute(() -> {
+            Integer nextid = Versioned.valueOrNull(portLoadBalancerNextStore
+                    .get(portLoadBalancer.portLoadBalancerId()));
+            if (nextid == null) {
+                // Build a new context and new next objective
+                PortLoadBalancerObjectiveContext context =
+                        new PortLoadBalancerObjectiveContext(portLoadBalancer.portLoadBalancerId());
+                NextObjective nextObj = nextObjBuilder(portLoadBalancer.portLoadBalancerId(),
+                        portLoadBalancer.ports(), nextid).add(context);
+                // Finally submit, store, and register the resource
+                flowObjService.next(deviceId, nextObj);
+                portLoadBalancerNextStore.put(portLoadBalancer.portLoadBalancerId(), nextObj.id());
+            } else {
+                log.info("NextObj for {} already exists. Skip populatePortLoadBalancer",
+                        portLoadBalancer.portLoadBalancerId());
+            }
+        });
+    }
+
+    private void revokePortLoadBalancer(PortLoadBalancer portLoadBalancer) {
+        DeviceId deviceId = portLoadBalancer.portLoadBalancerId().deviceId();
+        if (!isLocalLeader(deviceId)) {
+            log.debug("Not the leader of {}. Skip revokePortLoadBalancer {}", deviceId,
+                    portLoadBalancer.portLoadBalancerId());
+            return;
+        }
+
+        portLoadBalancerProvExecutor.execute(() -> {
+            Integer nextid = Versioned.valueOrNull(portLoadBalancerNextStore.get(portLoadBalancer
+                    .portLoadBalancerId()));
+            if (nextid != null) {
+                // Build a new context and remove old next objective
+                PortLoadBalancerObjectiveContext context =
+                        new PortLoadBalancerObjectiveContext(portLoadBalancer.portLoadBalancerId());
+                NextObjective nextObj = nextObjBuilder(portLoadBalancer.portLoadBalancerId(), portLoadBalancer.ports(),
+                        nextid).remove(context);
+                // Finally submit and invalidate the store
+                flowObjService.next(deviceId, nextObj);
+                portLoadBalancerNextStore.remove(portLoadBalancer.portLoadBalancerId());
+            } else {
+                log.info("NextObj for {} does not exist. Skip revokePortLoadBalancer",
+                        portLoadBalancer.portLoadBalancerId());
+            }
+        });
+    }
+
+    private void updatePortLoadBalancer(PortLoadBalancer newPortLoadBalancer, PortLoadBalancer oldPortLoadBalancer) {
+        DeviceId deviceId = newPortLoadBalancer.portLoadBalancerId().deviceId();
+        if (!isLocalLeader(deviceId)) {
+            log.debug("Not the leader of {}. Skip updatePortLoadBalancer {}", deviceId,
+                    newPortLoadBalancer.portLoadBalancerId());
+            return;
+        }
+
+        portLoadBalancerProvExecutor.execute(() -> {
+            Integer nextid = Versioned.valueOrNull(portLoadBalancerNextStore
+                    .get(newPortLoadBalancer.portLoadBalancerId()));
+            if (nextid != null) {
+                // Compute modifications and context
+                PortLoadBalancerObjectiveContext context =
+                        new PortLoadBalancerObjectiveContext(newPortLoadBalancer.portLoadBalancerId());
+                Set<PortNumber> portsToBeAdded =
+                        Sets.difference(newPortLoadBalancer.ports(), oldPortLoadBalancer.ports());
+                Set<PortNumber> portsToBeRemoved =
+                        Sets.difference(oldPortLoadBalancer.ports(), newPortLoadBalancer.ports());
+                // and send them to the flowobj subsystem
+                if (!portsToBeAdded.isEmpty()) {
+                    flowObjService.next(deviceId, nextObjBuilder(newPortLoadBalancer.portLoadBalancerId(),
+                            portsToBeAdded, nextid)
+                            .addToExisting(context));
+                } else {
+                    log.debug("NextObj for {} nothing to add", newPortLoadBalancer.portLoadBalancerId());
+
+                }
+                if (!portsToBeRemoved.isEmpty()) {
+                    flowObjService.next(deviceId, nextObjBuilder(newPortLoadBalancer.portLoadBalancerId(),
+                            portsToBeRemoved, nextid)
+                            .removeFromExisting(context));
+                } else {
+                    log.debug("NextObj for {} nothing to remove", newPortLoadBalancer.portLoadBalancerId());
+                }
+            } else {
+                log.info("NextObj for {} does not exist. Skip updatePortLoadBalancer",
+                        newPortLoadBalancer.portLoadBalancerId());
+            }
+        });
+    }
+
+    private NextObjective.Builder nextObjBuilder(PortLoadBalancerId portLoadBalancerId, Set<PortNumber> ports,
+                                                 Integer nextId) {
+        if (nextId == null) {
+            nextId = flowObjService.allocateNextId();
+        }
+        // This metadata is used to pass the key to the driver.
+        // Some driver, e.g. OF-DPA, will use that information while creating load balancing group.
+        // TODO This is not an actual LAG port. In the future, we should extend metadata structure to carry
+        //      generic information. We should avoid using in_port in the metadata once generic metadata is available.
+        TrafficSelector meta = DefaultTrafficSelector.builder()
+                .matchInPort(PortNumber.portNumber(portLoadBalancerId.key())).build();
+        NextObjective.Builder nextObjBuilder = DefaultNextObjective.builder()
+                .withId(nextId)
+                .withMeta(meta)
+                .withType(NextObjective.Type.HASHED)
+                .fromApp(appId);
+        ports.forEach(port -> {
+            TrafficTreatment treatment = DefaultTrafficTreatment.builder().setOutput(port).build();
+            nextObjBuilder.addTreatment(DefaultNextTreatment.of(treatment));
+        });
+        return nextObjBuilder;
+    }
+
+    // Custom-built function, when the device is not available we need a fallback mechanism
+    private boolean isLocalLeader(DeviceId deviceId) {
+        if (!mastershipService.isLocalMaster(deviceId)) {
+            // When the device is available we just check the mastership
+            if (deviceService.isAvailable(deviceId)) {
+                return false;
+            }
+            // Fallback with Leadership service - device id is used as topic
+            NodeId leader = leadershipService.runForLeadership(
+                    deviceId.toString()).leaderNodeId();
+            // Verify if this node is the leader
+            return clusterService.getLocalNode().id().equals(leader);
+        }
+        return true;
+    }
+
+    private final class PortLoadBalancerObjectiveContext implements ObjectiveContext {
+        private final PortLoadBalancerId portLoadBalancerId;
+
+        private PortLoadBalancerObjectiveContext(PortLoadBalancerId portLoadBalancerId) {
+            this.portLoadBalancerId = portLoadBalancerId;
+        }
+
+        @Override
+        public void onSuccess(Objective objective) {
+            NextObjective nextObj = (NextObjective) objective;
+            log.debug("Successfully {} nextobj {} for port load balancer {}. NextObj={}",
+                    nextObj.op(), nextObj.id(), portLoadBalancerId, nextObj);
+            portLoadBalancerProvExecutor.execute(() -> onSuccessHandler(nextObj, portLoadBalancerId));
+        }
+
+        @Override
+        public void onError(Objective objective, ObjectiveError error) {
+            NextObjective nextObj = (NextObjective) objective;
+            log.warn("Failed to {} nextobj {} for port load balancer {} due to {}. NextObj={}",
+                    nextObj.op(), nextObj.id(), portLoadBalancerId, error, nextObj);
+            portLoadBalancerProvExecutor.execute(() -> onErrorHandler(nextObj, portLoadBalancerId));
+        }
+    }
+
+    private void onSuccessHandler(NextObjective nextObjective, PortLoadBalancerId portLoadBalancerId) {
+        // Operation done
+        PortLoadBalancerData oldPortLoadBalancerData = new PortLoadBalancerData(portLoadBalancerId);
+        PortLoadBalancerData newPortLoadBalancerData = new PortLoadBalancerData(portLoadBalancerId);
+        // Other operations will not lead to a generation of an event
+        switch (nextObjective.op()) {
+            case ADD:
+                newPortLoadBalancerData.setNextId(nextObjective.id());
+                post(new PortLoadBalancerEvent(PortLoadBalancerEvent.Type.INSTALLED, newPortLoadBalancerData,
+                        oldPortLoadBalancerData));
+                break;
+            case REMOVE:
+                oldPortLoadBalancerData.setNextId(nextObjective.id());
+                post(new PortLoadBalancerEvent(PortLoadBalancerEvent.Type.UNINSTALLED, newPortLoadBalancerData,
+                        oldPortLoadBalancerData));
+                break;
+            default:
+                break;
+        }
+    }
+
+    private void onErrorHandler(NextObjective nextObjective, PortLoadBalancerId portLoadBalancerId) {
+        // There was a failure
+        PortLoadBalancerData portLoadBalancerData = new PortLoadBalancerData(portLoadBalancerId);
+        // send FAILED event;
+        switch (nextObjective.op()) {
+            case ADD:
+                // If ADD is failing apps do not know the next id; let's update the store
+                portLoadBalancerNextStore.remove(portLoadBalancerId);
+                portLoadBalancerResStore.remove(portLoadBalancerId);
+                portLoadBalancerStore.remove(portLoadBalancerId);
+                post(new PortLoadBalancerEvent(PortLoadBalancerEvent.Type.FAILED, portLoadBalancerData,
+                        portLoadBalancerData));
+                break;
+            case ADD_TO_EXISTING:
+                // If ADD_TO_EXISTING is failing let's remove the failed ports
+                Collection<PortNumber> addedPorts = nextObjective.next().stream()
+                        .flatMap(t -> t.allInstructions().stream())
+                        .filter(i -> i.type() == Instruction.Type.OUTPUT)
+                        .map(i -> ((Instructions.OutputInstruction) i).port())
+                        .collect(Collectors.toList());
+                portLoadBalancerStore.compute(portLoadBalancerId, (key, value) -> {
+                    if (value != null && value.ports() != null && !value.ports().isEmpty()) {
+                        value.ports().removeAll(addedPorts);
+                    }
+                    return value;
+                });
+                portLoadBalancerData.setNextId(nextObjective.id());
+                post(new PortLoadBalancerEvent(PortLoadBalancerEvent.Type.FAILED, portLoadBalancerData,
+                        portLoadBalancerData));
+                break;
+            case REMOVE_FROM_EXISTING:
+                // If REMOVE_TO_EXISTING is failing let's re-add the failed ports
+                Collection<PortNumber> removedPorts = nextObjective.next().stream()
+                        .flatMap(t -> t.allInstructions().stream())
+                        .filter(i -> i.type() == Instruction.Type.OUTPUT)
+                        .map(i -> ((Instructions.OutputInstruction) i).port())
+                        .collect(Collectors.toList());
+                portLoadBalancerStore.compute(portLoadBalancerId, (key, value) -> {
+                    if (value != null && value.ports() != null) {
+                        value.ports().addAll(removedPorts);
+                    }
+                    return value;
+                });
+                portLoadBalancerData.setNextId(nextObjective.id());
+                post(new PortLoadBalancerEvent(PortLoadBalancerEvent.Type.FAILED, portLoadBalancerData,
+                        portLoadBalancerData));
+                break;
+            case VERIFY:
+            case REMOVE:
+                // If ADD/REMOVE_TO_EXISTING, REMOVE and VERIFY are failing let's send
+                // also the info about the next id
+                portLoadBalancerData.setNextId(nextObjective.id());
+                post(new PortLoadBalancerEvent(PortLoadBalancerEvent.Type.FAILED, portLoadBalancerData,
+                        portLoadBalancerData));
+                break;
+            default:
+                break;
+        }
+
+    }
+}
\ No newline at end of file