--- /dev/null
+/*
+ * Copyright © 2017 AT&T and others. All rights reserved.
+ *
+ * This program and the accompanying materials are made available under the
+ * terms of the Eclipse Public License v1.0 which accompanies this distribution,
+ * and is available at http://www.eclipse.org/legal/epl-v10.html
+ */
+
+package org.opendaylight.transportpce.inventory.listener;
+
+import java.util.Collection;
+import java.util.List;
+import java.util.concurrent.ExecutionException;
+import java.util.stream.Collectors;
+
+import org.opendaylight.mdsal.binding.api.DataObjectModification.ModificationType;
+import org.opendaylight.mdsal.binding.api.DataTreeChangeListener;
+import org.opendaylight.mdsal.binding.api.DataTreeModification;
+import org.opendaylight.transportpce.common.StringConstants;
+import org.opendaylight.transportpce.inventory.DeviceInventory;
+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;
+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.network.topology.topology.Node;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+/**
+ * This class implements the {@link DataTreeChangeListener} on a {@link Node}.
+ * This listener should be registered on a netconf topology node.
+ */
+public class DeviceListener implements DataTreeChangeListener<Node> {
+
+ private static final Logger LOG = LoggerFactory.getLogger(DeviceListener.class);
+ private final DeviceInventory deviceInventory;
+
+ /**
+ * Default constructor invoked by blueprint injects {@link DeviceInventory} as a persistence layer.
+ *
+ * @param deviceInventory reference to the {@link DeviceInventory}
+ */
+ public DeviceListener(DeviceInventory deviceInventory) {
+ this.deviceInventory = deviceInventory;
+ }
+
+ @Override
+ public void onDataTreeChanged(Collection<DataTreeModification<Node>> changes) {
+ //LOG.debug("testing np1:"+changes.toString());
+ String openROADMversion = "";
+ List<DataTreeModification<Node>> changesWithoutDefaultNetconfNode = getRealDevicesOnly(changes);
+ for (DataTreeModification<Node> device : changesWithoutDefaultNetconfNode) {
+ String nodeId = device.getRootNode().getDataAfter().key().getNodeId().getValue();
+ NetconfNode netconfNode = device.getRootNode().getDataAfter().augmentation(NetconfNode.class);
+ NetconfNodeConnectionStatus.ConnectionStatus connectionStatus =
+ netconfNode.getConnectionStatus();
+ long count = netconfNode.getAvailableCapabilities().getAvailableCapability().stream()
+ .filter(cp -> cp.getCapability().contains(StringConstants.OPENROADM_DEVICE_MODEL_NAME))
+ .count();
+ LOG.info("DL ################## Modification Type {}",
+ device.getRootNode().getModificationType().toString());
+ LOG.info("DL ################## Capability Count {}", count);
+ LOG.info("DL ################## Connection Status {}", connectionStatus);
+ LOG.info("DL ################## device.getRootNode().getDataBefore() {}",
+ device.getRootNode().getDataBefore());
+ LOG.info("DL ################## device.getRootNode().getDataAfter() {}",
+ device.getRootNode().getDataAfter());
+
+
+ if (isCreate(device)) {
+ LOG.info("Node {} was created", nodeId);
+ try {
+ processModifiedSubtree(nodeId, netconfNode, openROADMversion);
+ } catch (InterruptedException | ExecutionException e) {
+ LOG.error(e.getMessage(), e);
+ }
+ } else if (isDelete(device)) {
+ LOG.info("Node {} was deleted", nodeId);
+ }
+ }
+ }
+
+ /**
+ * Handles the {@link ModificationType#SUBTREE_MODIFIED} case.
+ * If the changed node has.
+ *
+ * @param nodeId device id
+ * @param netconfNode netconf node
+ * @throws InterruptedException may be thrown if there is a problem getting the device from
+ * datastore
+ * @throws ExecutionException may be thrown if there is a problem getting the device from datastore
+ */
+ private void processModifiedSubtree(String nodeId, NetconfNode netconfNode, String openROADMversion)
+ throws InterruptedException, ExecutionException {
+ NetconfNodeConnectionStatus.ConnectionStatus connectionStatus = netconfNode.getConnectionStatus();
+
+ long count = netconfNode.getAvailableCapabilities().getAvailableCapability().stream()
+ .filter(cp -> cp.getCapability().contains(StringConstants.OPENROADM_DEVICE_MODEL_NAME))
+ .count();
+
+ if (count < 1) {
+ LOG.info("No {} capable device was found", StringConstants.OPENROADM_DEVICE_MODEL_NAME);
+ return;
+ }
+ if (ConnectionStatus.Connected.equals(connectionStatus)) {
+ LOG.info("DL The device is in {} state", connectionStatus);
+ deviceInventory.initializeDevice(nodeId, openROADMversion);
+ } else if (ConnectionStatus.Connecting.equals(connectionStatus)
+ || ConnectionStatus.UnableToConnect.equals(connectionStatus)) {
+ LOG.info("DL The device is in {} state", connectionStatus);
+ } else {
+ LOG.warn("DL Invalid connection status {}", connectionStatus);
+ }
+
+ }
+
+ /**
+ * Filters the {@link StringConstants#DEFAULT_NETCONF_NODEID} nodes from the provided {@link Collection}.
+ *
+ */
+ private static List<DataTreeModification<Node>> getRealDevicesOnly(Collection<DataTreeModification<Node>> changes) {
+ return changes.stream()
+ .filter(change -> (change.getRootNode().getDataAfter() != null
+ && !StringConstants.DEFAULT_NETCONF_NODEID
+ .equalsIgnoreCase(change.getRootNode().getDataAfter().key().getNodeId().getValue())
+ && change.getRootNode().getDataAfter().augmentation(NetconfNode.class) != null)
+ || (change.getRootNode().getDataBefore() != null
+ && !StringConstants.DEFAULT_NETCONF_NODEID.equalsIgnoreCase(
+ change.getRootNode().getDataBefore().key().getNodeId().getValue())
+ && change.getRootNode().getDataBefore().augmentation(NetconfNode.class) != null
+
+ )).collect(Collectors.toList());
+ }
+
+ /**
+ * In the filtered collection checks if the change is a new write.
+ *
+ */
+ private static boolean isCreate(DataTreeModification<Node> change) {
+ return change.getRootNode().getModificationType().toString().equalsIgnoreCase("WRITE");
+ }
+
+ /**
+ * In the filtered collection checks if the modification is update.
+ *
+ */
+ private static boolean isUpdate(DataTreeModification<Node> change) {
+ return ModificationType.SUBTREE_MODIFIED.equals(change.getRootNode().getModificationType());
+ }
+
+ /**
+ * In the filtered collection checks if the node was deleted.
+ *
+ */
+ private static boolean isDelete(DataTreeModification<Node> change) {
+ return change.getRootNode().getDataBefore() != null && change.getRootNode().getDataAfter() == null
+ && ModificationType.DELETE.equals(change.getRootNode().getModificationType());
+ }
+}