Add netconfnode-state-service

v2 add new service to devicemanager

Issue-ID: SDNC-1006
Signed-off-by: herbert <herbert.eiselt@highstreet-technologies.com>
Change-Id: Iaba3d02e0ef6078cba57a33e03c2b2ad7aa0bacd
Signed-off-by: herbert <herbert.eiselt@highstreet-technologies.com>

9 files changed, 731 insertions, 0 deletions

diff --git a/sdnr/wt/netconfnode-state-service/model/src/main/java/org/onap/ccsdk/features/sdnr/wt/netconfnodestateservice/Capabilities.java b/sdnr/wt/netconfnode-state-service/model/src/main/java/org/onap/ccsdk/features/sdnr/wt/netconfnodestateservice/Capabilities.java
new file mode 100644
index 000000000..ba80d305f
--- /dev/null
+++ b/sdnr/wt/netconfnode-state-service/model/src/main/java/org/onap/ccsdk/features/sdnr/wt/netconfnodestateservice/Capabilities.java
@@ -0,0 +1,226 @@
+/*******************************************************************************
+ * ============LICENSE_START========================================================================
+ * ONAP : ccsdk feature sdnr wt
+ * =================================================================================================
+ * Copyright (C) 2019 highstreet technologies GmbH Intellectual Property. All rights reserved.
+ * =================================================================================================
+ * 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.
+ * ============LICENSE_END==========================================================================
+ ******************************************************************************/
+/**
+ * Convert capabilities of netconfnode into internal format. Boron and Carbon are providing
+ * different versions
+ */
+package org.onap.ccsdk.features.sdnr.wt.netconfnodestateservice;
+
+import java.lang.reflect.InvocationTargetException;
+import java.lang.reflect.Method;
+import java.text.DateFormat;
+import java.text.SimpleDateFormat;
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.Date;
+import java.util.List;
+import java.util.Optional;
+import javax.annotation.Nullable;
+import org.eclipse.jdt.annotation.NonNull;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.netconf.node.topology.rev150114.NetconfNode;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.netconf.node.topology.rev150114.netconf.node.connection.status.AvailableCapabilities;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.netconf.node.topology.rev150114.netconf.node.connection.status.UnavailableCapabilities;
+import org.opendaylight.yangtools.yang.common.QName;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+/**
+ * Wrapper class for capabilites for Boron and later releases. Uses generics because yang model was
+ * changed from Boron to later version. Interface class:
+ * org.opendaylight.yang.gen.v1.urn.opendaylight.netconf.node.topology.rev150114.netconf.node.connection.status.available.capabilities.AvailableCapability
+ */
+public class Capabilities {
+
+    private static final Logger LOG = LoggerFactory.getLogger(Capabilities.class);
+
+    private static final String METHODNAME = "getCapability";
+    private final List<String> capabilities = new ArrayList<>();
+    private final DateFormat formatter = new SimpleDateFormat("yyyy-MM-dd");
+
+    private Capabilities() {}
+
+    @SuppressWarnings("null")
+    public static Capabilities getAvailableCapabilities(@Nullable NetconfNode nnode) {
+        LOG.info("GetAvailableCapabilities for node");
+        Capabilities capabilities = new Capabilities();
+        if (nnode != null) {
+            AvailableCapabilities availableCapabilites = nnode.getAvailableCapabilities();
+            if (availableCapabilites != null) {
+                   capabilities.constructor(availableCapabilites.getAvailableCapability());
+            } else {
+                LOG.debug("empty capabilites");
+            }
+        } else {
+            LOG.debug("No node provided");
+        }
+        return capabilities;
+    }
+
+    @SuppressWarnings("null")
+    public static Capabilities getUnavailableCapabilities(NetconfNode nnode) {
+        LOG.info("GetAvailableCapabilities for node");
+        Capabilities capabilities = new Capabilities();
+        if (nnode != null) {
+            UnavailableCapabilities availableCapabilites = nnode.getUnavailableCapabilities();
+            if (availableCapabilites != null) {
+                   capabilities.constructor(availableCapabilites.getUnavailableCapability());
+            } else {
+                LOG.debug("empty capabilites");
+            }
+        } else {
+            LOG.debug("No node provided");
+        }
+        return capabilities;
+    }
+
+
+    /**
+     * Does all construction steps
+     *
+     * @param pcapabilities with a list of capabilities. <br>
+     *        Type could be <br>
+     *        - Boron: List<code><String></code> <br>
+     *        - Carbon: List<AvailableCapability>
+     */
+    private void constructor(List<@NonNull ?> pcapabilities) {
+        if (pcapabilities != null) {
+            Method methodGetCapability;
+
+            for (Object capability : pcapabilities) {
+               if (capability instanceof String) { // ODL Boron specific
+                    this.capabilities.add((String) capability);
+                } else { // Carbon specific part .. handled via generics
+                    try {
+                        methodGetCapability = capability.getClass().getDeclaredMethod(METHODNAME);
+                        methodGetCapability.setAccessible(true);
+                        this.capabilities.add(methodGetCapability.invoke(capability).toString());
+                    } catch (NoSuchMethodException | SecurityException | IllegalAccessException
+                            | IllegalArgumentException | InvocationTargetException e) {
+                        LOG.warn("Capability class with missing interface method {}: {} {} {}", METHODNAME,
+                                e.getMessage(), capability.getClass(),
+                                Arrays.toString(capability.getClass().getInterfaces()));
+                    }
+                }
+            }
+        }
+    }
+
+    /**
+     * Get Capabilites
+     * @return List<String> with capabilites
+     */
+    public List<String> getCapabilities() {
+        return capabilities;
+    }
+
+    /**
+     * Verify if the namespace is supported
+     * @param qCapability from model
+     * @return true if namespace is supported
+     */
+    public boolean isSupportingNamespace(QName qCapability) {
+
+        String namespace = qCapability.getNamespace().toString();
+
+        return isSupportingNamespaceAndRevision(namespace, null);
+
+    }
+
+    /**
+     * check if the namespace and its revision are supported by the given capabilities
+     *
+     * @param qCapability capability from the model
+     * @return true if supporting the model AND revision<br>
+     * false if revision not available or both not found.
+     */
+    public boolean isSupportingNamespaceAndRevision(QName qCapability) {
+
+        String namespace = qCapability.getNamespace().toString();
+        String revision = getRevisionString(qCapability);
+        return revision == null ? false : isSupportingNamespaceAndRevision(namespace, revision);
+    }
+
+    /**
+     *
+     * @param namespace requested
+     * @param revision request or null for any revision
+     * @return true if existing
+     */
+    private boolean isSupportingNamespaceAndRevision(String namespace, @Nullable String revision) {
+        LOG.trace("isSupportingNamespaceAndRevision: Model namespace {}?[revision {}]", namespace, revision);
+        for (String capability : capabilities) {
+            if (capability.contains(namespace) && (revision == null || capability.contains(revision))) {
+                LOG.trace("Verify true with: {}", capability);
+                return true;
+            } else {
+                LOG.trace("Verify false with: {}", capability);
+            }
+        }
+        return false;
+    }
+
+    /**
+     * Provide revision as String from QName, considering older formats.
+     * @param qCapability that specifies the revision
+     * @return String with revisiondate or null
+     */
+    private String getRevisionString(QName qCapability) {
+        Object revisionObject = qCapability.getRevision();
+        String revision = null;
+        if (revisionObject instanceof Optional) {
+            if (((Optional<?>) revisionObject).isPresent()) {
+                revisionObject = ((Optional<?>) revisionObject).get();
+                LOG.info("Unwrapp Optional: {}", revisionObject != null ? revisionObject.getClass() : null);
+            }
+        }
+        if (revisionObject == null) {
+            // Cover null case
+        } else if (revisionObject instanceof String) {
+            revision = (String) revisionObject;
+        } else if (revisionObject instanceof Date) {
+            revision = formatter.format((Date) revisionObject);
+        } else {
+            revision = revisionObject.toString();
+            LOG.debug("Revision number type not supported. Use toString().String:{} Class:{} ", revisionObject,
+                    revisionObject.getClass().getName());
+        }
+        return revision;
+    }
+
+    /**
+     * Get revision of first entry of related capability
+     * @param qCapability that specifies the namespace
+     * @return String with date or
+     */
+    public String getRevisionForNamespace(QName qCapability) {
+        String namespace = qCapability.getNamespace().toString();
+       for (String capability : capabilities) {
+            if (capability.contains(namespace)) {
+                return QName.create(capability).getRevision().get().toString();
+            }
+        }
+        return "Unsupported";
+    }
+
+
+    @Override
+    public String toString() {
+        return "Capabilities [capabilities=" + capabilities + "]";
+    }
+
+}
diff --git a/sdnr/wt/netconfnode-state-service/model/src/main/java/org/onap/ccsdk/features/sdnr/wt/netconfnodestateservice/INetconfAcessor.java b/sdnr/wt/netconfnode-state-service/model/src/main/java/org/onap/ccsdk/features/sdnr/wt/netconfnodestateservice/INetconfAcessor.java
new file mode 100644
index 000000000..a186b3c6e
--- /dev/null
+++ b/sdnr/wt/netconfnode-state-service/model/src/main/java/org/onap/ccsdk/features/sdnr/wt/netconfnodestateservice/INetconfAcessor.java
@@ -0,0 +1,74 @@
+/*******************************************************************************
+ * ============LICENSE_START========================================================================
+ * ONAP : ccsdk feature sdnr wt
+ * =================================================================================================
+ * Copyright (C) 2019 highstreet technologies GmbH Intellectual Property. All rights reserved.
+ * =================================================================================================
+ * 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.
+ * ============LICENSE_END==========================================================================
+ ******************************************************************************/
+package org.onap.ccsdk.features.sdnr.wt.netconfnodestateservice;
+
+import org.eclipse.jdt.annotation.NonNull;
+import org.opendaylight.mdsal.binding.api.DataBroker;
+import org.opendaylight.mdsal.binding.api.MountPoint;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.netconf.node.topology.rev150114.NetconfNode;
+import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.NodeId;
+import org.opendaylight.yangtools.concepts.ListenerRegistration;
+import org.opendaylight.yangtools.yang.binding.NotificationListener;
+
+/**
+  * Interface handling netconf connection.
+ */
+public interface INetconfAcessor {
+
+    /**
+     * @return the nodeId
+     */
+    NodeId getNodeId();
+
+    /**
+     * @return NetconfNode of this connection
+     */
+    NetconfNode getNetconfNode();
+
+    /**
+     * @return Capabilites
+     */
+    Capabilities getCapabilites();
+
+    /**
+     * @return the dataBroker
+     */
+    DataBroker getDataBroker();
+
+    /**
+     * @return the MDSAL Mountpoint service
+     **/
+    MountPoint getMountpoint();
+
+    /**
+     * @Return TransAction
+     */
+    TransactionUtils getTransactionUtils();
+
+
+    /**
+     * Register netconf notification listener for related mountpoint
+     *
+     * @param <T>        specific child class of NotificationListener
+     * @param listener   listener to be called
+     * @return handler to manager registration
+     */
+    <T extends NotificationListener> ListenerRegistration<NotificationListener> doRegisterNotificationListener(
+            @NonNull T listener);
+
+}
diff --git a/sdnr/wt/netconfnode-state-service/model/src/main/java/org/onap/ccsdk/features/sdnr/wt/netconfnodestateservice/NetconfAccessor.java b/sdnr/wt/netconfnode-state-service/model/src/main/java/org/onap/ccsdk/features/sdnr/wt/netconfnodestateservice/NetconfAccessor.java
new file mode 100644
index 000000000..c80c7befc
--- /dev/null
+++ b/sdnr/wt/netconfnode-state-service/model/src/main/java/org/onap/ccsdk/features/sdnr/wt/netconfnodestateservice/NetconfAccessor.java
@@ -0,0 +1,109 @@
+/**
+ * ============LICENSE_START========================================================================
+ * ONAP : ccsdk feature sdnr wt
+ * =================================================================================================
+ * Copyright (C) 2019 highstreet technologies GmbH Intellectual Property. All rights reserved.
+ * =================================================================================================
+ * 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.
+ * ============LICENSE_END==========================================================================
+ */
+package org.onap.ccsdk.features.sdnr.wt.netconfnodestateservice;
+
+import java.util.Optional;
+import org.eclipse.jdt.annotation.NonNull;
+import org.opendaylight.mdsal.binding.api.DataBroker;
+import org.opendaylight.mdsal.binding.api.MountPoint;
+import org.opendaylight.mdsal.binding.api.NotificationService;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.netconf.node.topology.rev150114.NetconfNode;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.netconf.node.topology.rev150114.NetconfNodeConnectionStatus.ConnectionStatus;
+import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.NodeId;
+import org.opendaylight.yangtools.concepts.ListenerRegistration;
+import org.opendaylight.yangtools.yang.binding.NotificationListener;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+public class NetconfAccessor implements INetconfAcessor {
+
+    private static final Logger log = LoggerFactory.getLogger(NetconfAccessor.class);
+
+    private final NodeId nodeId;
+    private final DataBroker dataBroker;
+    private final TransactionUtils transactionUtils;
+    private final MountPoint mountpoint;
+    private final NetconfNode netconfNode;
+    private final Capabilities capabilities;
+
+    /**
+     * @param nodeId     of managed netconf node
+     * @param dataBroker to access node
+     */
+    public NetconfAccessor(NodeId nodeId, NetconfNode netconfNode, DataBroker dataBroker, MountPoint mountpoint,
+            TransactionUtils transactionUtils) {
+        super();
+        this.nodeId = nodeId;
+        this.netconfNode = netconfNode;
+        this.dataBroker = dataBroker;
+        this.mountpoint = mountpoint;
+        this.transactionUtils = transactionUtils;
+
+        ConnectionStatus csts = netconfNode != null ? netconfNode.getConnectionStatus() : null;
+        this.capabilities = Capabilities.getAvailableCapabilities(csts != null ? netconfNode : null);
+    }
+
+    /**
+     * @param nodeId     with uuid of managed netconf node
+     * @param dataBroker to access node
+     */
+    public NetconfAccessor(String nodeId, NetconfNode netconfNode, DataBroker dataBroker, MountPoint mountpoint,
+            TransactionUtils transactionUtils) {
+        this(new NodeId(nodeId), netconfNode, dataBroker, mountpoint, transactionUtils);
+    }
+
+    @Override
+    public NodeId getNodeId() {
+        return nodeId;
+    }
+
+    @Override
+    public DataBroker getDataBroker() {
+        return dataBroker;
+    }
+    @Override
+    public MountPoint getMountpoint() {
+        return mountpoint;
+    }
+    @Override
+    public TransactionUtils getTransactionUtils() {
+        return transactionUtils;
+    }
+    @Override
+    public NetconfNode getNetconfNode() {
+        return netconfNode;
+    }
+    @Override
+    public Capabilities getCapabilites() {
+        return capabilities;
+    }
+
+    @Override
+    public @NonNull <T extends NotificationListener> ListenerRegistration<NotificationListener> doRegisterNotificationListener(@NonNull T listener) {
+        log.info("Begin register listener for Mountpoint {}", mountpoint.getIdentifier().toString());
+        final Optional<NotificationService> optionalNotificationService = mountpoint
+                .getService(NotificationService.class);
+        final NotificationService notificationService = optionalNotificationService.get();
+        final ListenerRegistration<NotificationListener> ranListenerRegistration = notificationService
+                .registerNotificationListener(listener);
+        log.info("End registration listener for Mountpoint {} Listener: {} Result: {}",
+                mountpoint.getIdentifier().toString(), optionalNotificationService, ranListenerRegistration);
+        return ranListenerRegistration;
+    }
+
+}
diff --git a/sdnr/wt/netconfnode-state-service/model/src/main/java/org/onap/ccsdk/features/sdnr/wt/netconfnodestateservice/NetconfNodeConnectListener.java b/sdnr/wt/netconfnode-state-service/model/src/main/java/org/onap/ccsdk/features/sdnr/wt/netconfnodestateservice/NetconfNodeConnectListener.java
new file mode 100644
index 000000000..942e29f19
--- /dev/null
+++ b/sdnr/wt/netconfnode-state-service/model/src/main/java/org/onap/ccsdk/features/sdnr/wt/netconfnodestateservice/NetconfNodeConnectListener.java
@@ -0,0 +1,50 @@
+/*******************************************************************************
+ * ============LICENSE_START========================================================================
+ * ONAP : ccsdk feature sdnr wt
+ * =================================================================================================
+ * Copyright (C) 2019 highstreet technologies GmbH Intellectual Property. All rights reserved.
+ * =================================================================================================
+ * 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.
+ * ============LICENSE_END==========================================================================
+ ******************************************************************************/
+
+package org.onap.ccsdk.features.sdnr.wt.netconfnodestateservice;
+
+import java.util.EventListener;
+
+import org.opendaylight.mdsal.binding.api.DataBroker;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.netconf.node.topology.rev150114.NetconfNode;
+import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.NodeId;
+
+/**
+ *  Indicate if device is connected or not.
+ *  A NetconfNode (Mountpoint) is providing the status.
+ *  If this is Master and connected, this function is calles.
+ */
+
+public interface NetconfNodeConnectListener extends EventListener, AutoCloseable {
+
+	/**
+	 * Called if device state changes to "connected" for a netconf master node.
+	 * @param nNodeId name of mount point
+	 * @param netconfNode with related information
+	 * @param netconfNodeDataBroker to access connected netconf device
+	 */
+	public void onEnterConnected(NodeId nNodeId, NetconfNode netconfNode, DataBroker netconfNodeDataBroker);
+
+	/**
+	 * Notify of device state change to "not connected" mount point supervision.
+	 * HINT: This callback could be called multiple times also the onEnterConnected state was not called.
+	 * @param nNodeId name of mount point
+	 */
+	public void onLeaveConnected(NodeId nNodeId);
+
+}
diff --git a/sdnr/wt/netconfnode-state-service/model/src/main/java/org/onap/ccsdk/features/sdnr/wt/netconfnodestateservice/NetconfNodeStateListener.java b/sdnr/wt/netconfnode-state-service/model/src/main/java/org/onap/ccsdk/features/sdnr/wt/netconfnodestateservice/NetconfNodeStateListener.java
new file mode 100644
index 000000000..253af0598
--- /dev/null
+++ b/sdnr/wt/netconfnode-state-service/model/src/main/java/org/onap/ccsdk/features/sdnr/wt/netconfnodestateservice/NetconfNodeStateListener.java
@@ -0,0 +1,53 @@
+/*******************************************************************************
+ * ============LICENSE_START========================================================================
+ * ONAP : ccsdk feature sdnr wt
+ * =================================================================================================
+ * Copyright (C) 2019 highstreet technologies GmbH Intellectual Property. All rights reserved.
+ * =================================================================================================
+ * 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.
+ * ============LICENSE_END==========================================================================
+ ******************************************************************************/
+
+package org.onap.ccsdk.features.sdnr.wt.netconfnodestateservice;
+
+import java.util.EventListener;
+
+import org.opendaylight.yang.gen.v1.urn.opendaylight.netconf.node.topology.rev150114.NetconfNode;
+import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.NodeId;
+
+/**
+ * Indicate all state changes of NetconfNode (Mountpoint). Cleans up and
+ * summarizes the
+ */
+public interface NetconfNodeStateListener extends EventListener {
+
+	/**
+	 * New NetconfNode has been created
+	 * @param nNodeId of Node
+	 * @param netconfNode object
+	 */
+
+	void onCreated(NodeId nNodeId, NetconfNode netconfNode);
+
+	/**
+	 * New NetconfNode has been created
+	 * @param nNodeId of node
+	 * @param netconfNode object after change
+	 */
+	void onStateChange(NodeId nNodeId, NetconfNode netconfNode);
+
+	/**
+	 * NetconfNode has been removed
+	 * @param nNodeId of related node
+	 */
+	void onRemoved(NodeId nNodeId);
+
+}
diff --git a/sdnr/wt/netconfnode-state-service/model/src/main/java/org/onap/ccsdk/features/sdnr/wt/netconfnodestateservice/NetconfNodeStateService.java b/sdnr/wt/netconfnode-state-service/model/src/main/java/org/onap/ccsdk/features/sdnr/wt/netconfnodestateservice/NetconfNodeStateService.java
new file mode 100644
index 000000000..0105c36e8
--- /dev/null
+++ b/sdnr/wt/netconfnode-state-service/model/src/main/java/org/onap/ccsdk/features/sdnr/wt/netconfnodestateservice/NetconfNodeStateService.java
@@ -0,0 +1,48 @@
+/*******************************************************************************
+ * ============LICENSE_START========================================================================
+ * ONAP : ccsdk feature sdnr wt
+ * =================================================================================================
+ * Copyright (C) 2019 highstreet technologies GmbH Intellectual Property. All rights reserved.
+ * =================================================================================================
+ * 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.
+ * ============LICENSE_END==========================================================================
+ ******************************************************************************/
+
+package org.onap.ccsdk.features.sdnr.wt.netconfnodestateservice;
+
+import org.eclipse.jdt.annotation.NonNull;
+import org.opendaylight.yangtools.concepts.ListenerRegistration;
+import org.opendaylight.yangtools.concepts.Registration;
+
+public interface NetconfNodeStateService extends Registration {
+
+    /**
+     * Register for indication that Master NetconNode is entering or leaving Connected state.
+     * @param netconfNodeConnectListener
+     * @return managing object for listener
+     */
+    @NonNull <L extends NetconfNodeConnectListener> ListenerRegistration<L> registerNetconfNodeConnectListener(@NonNull L netconfNodeConnectListener);
+
+    /**
+     * Register for all NetconfNode specific state changes
+     * @param netconfNodeStateListener
+     * @return managing object for listener
+     */
+    @NonNull <L extends NetconfNodeStateListener> ListenerRegistration<L> registerNetconfNodeStateListener(@NonNull L netconfNodeStateListener);
+
+    /**
+     * Register for Ves/DmaaP provided messages
+     * @param netconfNodeStateListener
+     * @return managing object for listener
+     */
+    @NonNull <L extends VesNotificationListener> ListenerRegistration<L> registerVesNotifications(@NonNull L netconfNodeStateListener);
+
+}
diff --git a/sdnr/wt/netconfnode-state-service/model/src/main/java/org/onap/ccsdk/features/sdnr/wt/netconfnodestateservice/TransactionUtils.java b/sdnr/wt/netconfnode-state-service/model/src/main/java/org/onap/ccsdk/features/sdnr/wt/netconfnodestateservice/TransactionUtils.java
new file mode 100644
index 000000000..da8da5c7f
--- /dev/null
+++ b/sdnr/wt/netconfnode-state-service/model/src/main/java/org/onap/ccsdk/features/sdnr/wt/netconfnodestateservice/TransactionUtils.java
@@ -0,0 +1,62 @@
+/*******************************************************************************
+ * ============LICENSE_START========================================================================
+ * ONAP : ccsdk feature sdnr wt
+ * =================================================================================================
+ * Copyright (C) 2019 highstreet technologies GmbH Intellectual Property. All rights reserved.
+ * =================================================================================================
+ * 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.
+ * ============LICENSE_END==========================================================================
+ ******************************************************************************/
+package org.onap.ccsdk.features.sdnr.wt.netconfnodestateservice;
+
+import java.util.concurrent.atomic.AtomicBoolean;
+import java.util.concurrent.atomic.AtomicReference;
+import org.eclipse.jdt.annotation.Nullable;
+import org.opendaylight.mdsal.binding.api.DataBroker;
+import org.opendaylight.mdsal.common.api.LogicalDatastoreType;
+import org.opendaylight.yangtools.yang.binding.DataObject;
+import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
+
+/**
+ * @author herbert
+ *
+ */
+public interface TransactionUtils {
+
+	/**
+	 * Deliver the data back or null. Warning
+	 *
+	 * @param <T> SubType of the DataObject to be handled
+	 * @param dataBroker for accessing data
+	 * @param dataStoreType to address datastore
+	 * @param iid id to access data
+	 * @return null or object
+	 */
+	@Nullable
+	<T extends DataObject> T readData(DataBroker dataBroker, LogicalDatastoreType dataStoreType,
+			InstanceIdentifier<T> iid);
+
+	/**
+	 * Deliver the data back or null
+	 *
+	 * @param <T> SubType of the DataObject to be handled
+	 * @param dataBroker for accessing data
+	 * @param dataStoreType to address datastore
+	 * @param iid id to access data
+	 * @param noErrorIndication (Output) true if data could be read and are available and is not null
+	 * @param statusIndicator (Output) String with status indications during the read.
+	 * @return null or object
+	 */
+	@Nullable
+	<T extends DataObject> T readDataOptionalWithStatus(DataBroker dataBroker, LogicalDatastoreType dataStoreType,
+			InstanceIdentifier<T> iid, AtomicBoolean noErrorIndication, AtomicReference<String> statusIndicator);
+
+}
\ No newline at end of file
diff --git a/sdnr/wt/netconfnode-state-service/model/src/main/java/org/onap/ccsdk/features/sdnr/wt/netconfnodestateservice/VesNotificationListener.java b/sdnr/wt/netconfnode-state-service/model/src/main/java/org/onap/ccsdk/features/sdnr/wt/netconfnodestateservice/VesNotificationListener.java
new file mode 100644
index 000000000..e7d2481b8
--- /dev/null
+++ b/sdnr/wt/netconfnode-state-service/model/src/main/java/org/onap/ccsdk/features/sdnr/wt/netconfnodestateservice/VesNotificationListener.java
@@ -0,0 +1,45 @@
+/*******************************************************************************
+ * ============LICENSE_START========================================================================
+ * ONAP : ccsdk feature sdnr wt
+ * =================================================================================================
+ * Copyright (C) 2019 highstreet technologies GmbH Intellectual Property. All rights reserved.
+ * =================================================================================================
+ * 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.
+ * ============LICENSE_END==========================================================================
+ ******************************************************************************/
+
+package org.onap.ccsdk.features.sdnr.wt.netconfnodestateservice;
+
+import java.util.EventListener;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.netconfnode.state.rev191011.AttributeChangeNotification;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.netconfnode.state.rev191011.FaultNotification;
+
+/**
+ *  Indicate if device is connected or not.
+ *  A NetconfNode (Mountpoint) is providing the status.
+ *  If this is Master and connected, this function is calles.
+ */
+
+public interface VesNotificationListener extends EventListener, AutoCloseable {
+
+    /**
+     * Called in case of fault notification
+     * @param faultNotification to handle
+     */
+    public void onNotification(FaultNotification faultNotification);
+
+    /**
+     * Called in case of attributeChange notification
+     * @param attributeChangeNotification to handle
+     */
+    public void onNotification(AttributeChangeNotification attributeChangeNotification);
+
+}
diff --git a/sdnr/wt/netconfnode-state-service/model/src/main/yang/netconfnodestateservice.yang b/sdnr/wt/netconfnode-state-service/model/src/main/yang/netconfnodestateservice.yang
new file mode 100644
index 000000000..737f858de
--- /dev/null
+++ b/sdnr/wt/netconfnode-state-service/model/src/main/yang/netconfnodestateservice.yang
@@ -0,0 +1,64 @@
+module netconfnode-state {
+
+    yang-version 1;
+    namespace "urn:opendaylight:params:xml:ns:yang:netconfnode-state";
+    prefix "netconfnode-state";
+
+    import data-provider { prefix "data-provider"; }
+
+    description
+        "sdnr-wt-netconfnode-state-service Api Module";
+
+    revision "2019-10-11" {
+        description
+            "Initial revision";
+    }
+
+    container fault-notification {
+        description
+            "Handle fault problem notification of a network-element";
+        uses data-provider:object-change-reference;
+        uses data-provider:fault;
+    }
+    container attribute-change-notification {
+        description
+            "Handle  attribute change notification of a network-element";
+            uses data-provider:object-change-reference;
+            uses data-provider:attribute-change;
+    }
+    rpc push-fault-notification {
+        description
+            "Forward fault problem notification of a network-element";
+        input {
+            uses data-provider:object-change-reference;
+            uses data-provider:fault;
+        }
+    }
+    rpc push-attribute-change-notification {
+        description
+            "Forward attribute change notification of a network-element";
+        input {
+            uses data-provider:object-change-reference;
+            uses data-provider:attribute-change;
+        }
+    }
+
+    rpc get-status {
+        description
+                "Returns status information";
+
+        output {
+            list status {
+                description "Provides a key value list with status information";
+                key key;
+                leaf key {
+                    type string;
+                }
+                leaf value {
+                    type string;
+                }
+            }
+        }
+    }
+}
+