+++ /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.netconf.mdsal.notification.impl;
-
-import static com.google.common.base.Preconditions.checkArgument;
-import static java.util.Objects.requireNonNull;
-
-import java.util.ArrayList;
-import java.util.List;
-import java.util.Optional;
-import org.opendaylight.netconf.api.DocumentedException;
-import org.opendaylight.netconf.api.NetconfSession;
-import org.opendaylight.netconf.api.messages.NotificationMessage;
-import org.opendaylight.netconf.api.xml.XmlElement;
-import org.opendaylight.netconf.api.xml.XmlNetconfConstants;
-import org.opendaylight.netconf.mapping.api.SessionAwareNetconfOperation;
-import org.opendaylight.netconf.notifications.NetconfNotificationListener;
-import org.opendaylight.netconf.notifications.NetconfNotificationRegistry;
-import org.opendaylight.netconf.util.mapping.AbstractSingletonNetconfOperation;
-import org.opendaylight.netconf.util.messages.SubtreeFilter;
-import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.netconf.notification._1._0.rev080714.CreateSubscriptionInput;
-import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.netconf.notification._1._0.rev080714.StreamNameType;
-import org.opendaylight.yangtools.concepts.Registration;
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
-import org.w3c.dom.Document;
-import org.w3c.dom.Element;
-
-/**
- * Create subscription listens for create subscription requests
- * and registers notification listeners into notification registry.
- * Received notifications are sent to the client right away
- */
-public class CreateSubscription extends AbstractSingletonNetconfOperation
- implements SessionAwareNetconfOperation, AutoCloseable {
-
- private static final Logger LOG = LoggerFactory.getLogger(CreateSubscription.class);
-
- static final String CREATE_SUBSCRIPTION = "create-subscription";
-
- private final NetconfNotificationRegistry notifications;
- private final List<Registration> subscriptions = new ArrayList<>();
- private NetconfSession netconfSession;
-
- public CreateSubscription(final String netconfSessionIdForReporting,
- final NetconfNotificationRegistry notifications) {
- super(netconfSessionIdForReporting);
- this.notifications = notifications;
- }
-
- @Override
- protected Element handleWithNoSubsequentOperations(final Document document,
- final XmlElement operationElement) throws DocumentedException {
- operationElement.checkName(CREATE_SUBSCRIPTION);
- operationElement.checkNamespace(CreateSubscriptionInput.QNAME.getNamespace().toString());
- // FIXME reimplement using CODEC_REGISTRY and parse everything into generated class instance
- // Binding doesn't support anyxml nodes yet, so filter could not be retrieved
- // xml -> normalized node -> CreateSubscriptionInput conversion could be slower than current approach
-
- final Optional<XmlElement> filter = operationElement.getOnlyChildElementWithSameNamespaceOptionally("filter");
-
- // Replay not supported
- final Optional<XmlElement> startTime =
- operationElement.getOnlyChildElementWithSameNamespaceOptionally("startTime");
- checkArgument(startTime.isEmpty(), "StartTime element not yet supported");
-
- // Stop time not supported
- final Optional<XmlElement> stopTime =
- operationElement.getOnlyChildElementWithSameNamespaceOptionally("stopTime");
- checkArgument(stopTime.isEmpty(), "StopTime element not yet supported");
-
- final StreamNameType streamNameType = parseStreamIfPresent(operationElement);
-
- requireNonNull(netconfSession);
- // Premature streams are allowed (meaning listener can register even if no provider is available yet)
- if (!notifications.isStreamAvailable(streamNameType)) {
- LOG.warn("Registering premature stream {}. No publisher available yet for session {}", streamNameType,
- getNetconfSessionIdForReporting());
- }
-
- subscriptions.add(notifications.registerNotificationListener(streamNameType,
- new NotificationSubscription(netconfSession, filter)));
-
- return document.createElement(XmlNetconfConstants.OK);
- }
-
- private static StreamNameType parseStreamIfPresent(final XmlElement operationElement) throws DocumentedException {
- final Optional<XmlElement> stream = operationElement.getOnlyChildElementWithSameNamespaceOptionally("stream");
- return stream.isPresent() ? new StreamNameType(stream.orElseThrow().getTextContent())
- : NetconfNotificationManager.BASE_STREAM_NAME;
- }
-
- @Override
- protected String getOperationName() {
- return CREATE_SUBSCRIPTION;
- }
-
- @Override
- protected String getOperationNamespace() {
- return CreateSubscriptionInput.QNAME.getNamespace().toString();
- }
-
- @Override
- public void setSession(final NetconfSession session) {
- netconfSession = session;
- }
-
- @Override
- public void close() {
- netconfSession = null;
- // Unregister from notification streams
- subscriptions.forEach(Registration::close);
- subscriptions.clear();
- }
-
- private static class NotificationSubscription implements NetconfNotificationListener {
- private final NetconfSession currentSession;
- private final XmlElement filter;
-
- NotificationSubscription(final NetconfSession currentSession, final Optional<XmlElement> filter) {
- this.currentSession = currentSession;
- this.filter = filter.orElse(null);
- }
-
- @Override
- public void onNotification(final StreamNameType stream, final NotificationMessage notification) {
- if (filter == null) {
- currentSession.sendMessage(notification);
- return;
- }
-
- try {
- final Optional<Document> filtered =
- SubtreeFilter.applySubtreeNotificationFilter(filter, notification.getDocument());
- if (filtered.isPresent()) {
- currentSession.sendMessage(new NotificationMessage(filtered.orElseThrow(),
- notification.getEventTime()));
- }
- } catch (DocumentedException e) {
- LOG.warn("Failed to process notification {}", notification, e);
- currentSession.sendMessage(notification);
- }
- }
- }
-}
Code Review / netconf.git / blobdiff