--- /dev/null
+/*
+ * Copyright (c) 2015 Cisco Systems, Inc. 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.controller.messagebus.eventsources.netconf;
+
+import com.google.common.base.Optional;
+import com.google.common.base.Preconditions;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.concurrent.ConcurrentHashMap;
+import javax.xml.parsers.DocumentBuilder;
+import javax.xml.parsers.DocumentBuilderFactory;
+import javax.xml.parsers.ParserConfigurationException;
+import javax.xml.transform.dom.DOMSource;
+import org.opendaylight.controller.md.sal.dom.api.DOMNotification;
+import org.opendaylight.controller.md.sal.dom.api.DOMNotificationListener;
+import org.opendaylight.yang.gen.v1.urn.cisco.params.xml.ns.yang.messagebus.eventaggregator.rev141202.TopicId;
+import org.opendaylight.yang.gen.v1.urn.cisco.params.xml.ns.yang.messagebus.eventsource.rev141202.EventSourceStatus;
+import org.opendaylight.yang.gen.v1.urn.cisco.params.xml.ns.yang.messagebus.eventsource.rev141202.EventSourceStatusNotification;
+import org.opendaylight.yang.gen.v1.urn.cisco.params.xml.ns.yang.messagebus.eventsource.rev141202.EventSourceStatusNotificationBuilder;
+import org.opendaylight.yangtools.yang.common.QName;
+import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier.NodeIdentifier;
+import org.opendaylight.yangtools.yang.data.api.schema.AnyXmlNode;
+import org.opendaylight.yangtools.yang.data.api.schema.ContainerNode;
+import org.opendaylight.yangtools.yang.data.impl.schema.Builders;
+import org.opendaylight.yangtools.yang.model.api.SchemaPath;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.w3c.dom.Document;
+import org.w3c.dom.Element;
+
+public class ConnectionNotificationTopicRegistration extends NotificationTopicRegistration {
+
+ private static final Logger LOG = LoggerFactory.getLogger(ConnectionNotificationTopicRegistration.class);
+
+ public static final SchemaPath EVENT_SOURCE_STATUS_PATH = SchemaPath
+ .create(true, QName.create(EventSourceStatusNotification.QNAME, "event-source-status"));
+ private static final NodeIdentifier EVENT_SOURCE_STATUS_ARG = new NodeIdentifier(
+ EventSourceStatusNotification.QNAME);
+ private static final String XMLNS_ATTRIBUTE_KEY = "xmlns";
+ private static final String XMLNS_URI = "http://www.w3.org/2000/xmlns/";
+
+ private final DOMNotificationListener domNotificationListener;
+ private ConcurrentHashMap<SchemaPath, ArrayList<TopicId>> notificationTopicMap = new ConcurrentHashMap<>();
+
+ public ConnectionNotificationTopicRegistration(String SourceName, DOMNotificationListener domNotificationListener) {
+ super(NotificationSourceType.ConnectionStatusChange, SourceName,
+ EVENT_SOURCE_STATUS_PATH.getLastComponent().getNamespace().toString());
+ this.domNotificationListener = Preconditions.checkNotNull(domNotificationListener);
+ LOG.info("Connection notification source has been initialized.");
+ setActive(true);
+ setReplaySupported(false);
+ }
+
+ @Override public void close() throws Exception {
+ if (isActive()) {
+ LOG.debug("Connection notification - publish Deactive");
+ publishNotification(EventSourceStatus.Deactive);
+ notificationTopicMap.clear();
+ setActive(false);
+ }
+ }
+
+ @Override void activateNotificationSource() {
+ LOG.debug("Connection notification - publish Active");
+ publishNotification(EventSourceStatus.Active);
+ }
+
+ @Override void deActivateNotificationSource() {
+ LOG.debug("Connection notification - publish Inactive");
+ publishNotification(EventSourceStatus.Inactive);
+ }
+
+ @Override void reActivateNotificationSource() {
+ LOG.debug("Connection notification - reactivate - publish active");
+ publishNotification(EventSourceStatus.Active);
+ }
+
+ @Override boolean registerNotificationTopic(SchemaPath notificationPath, TopicId topicId) {
+ if (checkNotificationPath(notificationPath) == false) {
+ LOG.debug("Bad SchemaPath for notification try to register");
+ return false;
+ }
+ ArrayList<TopicId> topicIds = getNotificationTopicIds(notificationPath);
+ if (topicIds == null) {
+ topicIds = new ArrayList<>();
+ topicIds.add(topicId);
+ } else {
+ if (topicIds.contains(topicId) == false) {
+ topicIds.add(topicId);
+ }
+ }
+ notificationTopicMap.put(notificationPath, topicIds);
+ return true;
+ }
+
+ @Override ArrayList<TopicId> getNotificationTopicIds(SchemaPath notificationPath) {
+ return notificationTopicMap.get(notificationPath);
+ }
+
+ @Override synchronized void unRegisterNotificationTopic(TopicId topicId) {
+ List<SchemaPath> notificationPathToRemove = new ArrayList<>();
+ for (SchemaPath notifKey : notificationTopicMap.keySet()) {
+ ArrayList<TopicId> topicList = notificationTopicMap.get(notifKey);
+ if (topicList != null) {
+ topicList.remove(topicId);
+ if (topicList.isEmpty()) {
+ notificationPathToRemove.add(notifKey);
+ }
+ }
+ }
+ for (SchemaPath notifKey : notificationPathToRemove) {
+ notificationTopicMap.remove(notifKey);
+ }
+ }
+
+ private void publishNotification(EventSourceStatus eventSourceStatus) {
+
+ final EventSourceStatusNotification notification = new EventSourceStatusNotificationBuilder()
+ .setStatus(eventSourceStatus).build();
+ domNotificationListener.onNotification(createNotification(notification));
+ }
+
+ private DOMNotification createNotification(EventSourceStatusNotification notification) {
+ final ContainerNode cn = Builders.containerBuilder().withNodeIdentifier(EVENT_SOURCE_STATUS_ARG)
+ .withChild(encapsulate(notification)).build();
+ DOMNotification dn = new DOMNotification() {
+
+ @Override public SchemaPath getType() {
+ return EVENT_SOURCE_STATUS_PATH;
+ }
+
+ @Override public ContainerNode getBody() {
+ return cn;
+ }
+ };
+ return dn;
+ }
+
+ private AnyXmlNode encapsulate(EventSourceStatusNotification notification) {
+
+ DocumentBuilderFactory docFactory = DocumentBuilderFactory.newInstance();
+ DocumentBuilder docBuilder;
+
+ try {
+ docBuilder = docFactory.newDocumentBuilder();
+ } catch (ParserConfigurationException e) {
+ throw new IllegalStateException("Can not create XML DocumentBuilder");
+ }
+
+ Document doc = docBuilder.newDocument();
+
+ final Optional<String> namespace = Optional.of(EVENT_SOURCE_STATUS_ARG.getNodeType().getNamespace().toString());
+ final Element rootElement = createElement(doc, "EventSourceStatusNotification", namespace);
+
+ final Element sourceElement = doc.createElement("status");
+ sourceElement.appendChild(doc.createTextNode(notification.getStatus().name()));
+ rootElement.appendChild(sourceElement);
+
+ return Builders.anyXmlBuilder().withNodeIdentifier(EVENT_SOURCE_STATUS_ARG)
+ .withValue(new DOMSource(rootElement)).build();
+
+ }
+
+ // Helper to create root XML element with correct namespace and attribute
+ private Element createElement(final Document document, final String qName, final Optional<String> namespaceURI) {
+ if (namespaceURI.isPresent()) {
+ final Element element = document.createElementNS(namespaceURI.get(), qName);
+ String name = XMLNS_ATTRIBUTE_KEY;
+ if (element.getPrefix() != null) {
+ name += ":" + element.getPrefix();
+ }
+ element.setAttributeNS(XMLNS_URI, name, namespaceURI.get());
+ return element;
+ }
+ return document.createElement(qName);
+ }
+}
Code Review / controller.git / blobdiff