+++ /dev/null
-/*
- * Copyright (c) 2014 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.sal.streams.listeners;
-
-import java.util.ArrayList;
-import java.util.List;
-import java.util.Map;
-import java.util.Set;
-import java.util.concurrent.ConcurrentHashMap;
-import java.util.concurrent.locks.Lock;
-import java.util.concurrent.locks.ReentrantLock;
-import org.opendaylight.netconf.sal.restconf.impl.ControllerContext;
-import org.opendaylight.yang.gen.v1.urn.sal.restconf.event.subscription.rev140708.NotificationOutputTypeGrouping.NotificationOutputType;
-import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier;
-import org.opendaylight.yangtools.yang.model.api.NotificationDefinition;
-import org.opendaylight.yangtools.yang.model.api.stmt.SchemaNodeIdentifier.Absolute;
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
-
-/**
- * {@link Notificator} is responsible to create, remove and find
- * {@link ListenerAdapter} listener.
- */
-public final class Notificator {
-
- private static Map<String, ListenerAdapter> dataChangeListener = new ConcurrentHashMap<>();
- private static Map<String, List<NotificationListenerAdapter>> notificationListenersByStreamName =
- new ConcurrentHashMap<>();
-
- private static final Logger LOG = LoggerFactory.getLogger(Notificator.class);
- private static final Lock LOCK = new ReentrantLock();
-
- private Notificator() {
- }
-
- /**
- * Returns list of all stream names.
- */
- public static Set<String> getStreamNames() {
- return dataChangeListener.keySet();
- }
-
- /**
- * Gets {@link ListenerAdapter} specified by stream name.
- *
- * @param streamName
- * The name of the stream.
- * @return {@link ListenerAdapter} specified by stream name.
- */
- public static ListenerAdapter getListenerFor(final String streamName) {
- return dataChangeListener.get(streamName);
- }
-
- /**
- * Checks if the listener specified by {@link YangInstanceIdentifier} path exist.
- *
- * @param streamName name of the stream
- * @return True if the listener exist, false otherwise.
- */
- public static boolean existListenerFor(final String streamName) {
- return dataChangeListener.containsKey(streamName);
- }
-
- /**
- * Creates new {@link ListenerAdapter} listener from
- * {@link YangInstanceIdentifier} path and stream name.
- *
- * @param path
- * Path to data in data repository.
- * @param streamName
- * The name of the stream.
- * @param outputType
- * Spcific type of output for notifications - XML or JSON
- * @return New {@link ListenerAdapter} listener from
- * {@link YangInstanceIdentifier} path and stream name.
- */
- public static ListenerAdapter createListener(final YangInstanceIdentifier path, final String streamName,
- final NotificationOutputType outputType, final ControllerContext controllerContext) {
- final ListenerAdapter listener = new ListenerAdapter(path, streamName, outputType, controllerContext);
- try {
- LOCK.lock();
- dataChangeListener.put(streamName, listener);
- } finally {
- LOCK.unlock();
- }
- return listener;
- }
-
- /**
- * Looks for listener determined by {@link YangInstanceIdentifier} path and removes it.
- * Creates String representation of stream name from URI. Removes slash from URI in start and end position.
- *
- * @param uri
- * URI for creation stream name.
- * @return String representation of stream name.
- */
- public static String createStreamNameFromUri(final String uri) {
- if (uri == null) {
- return null;
- }
- String result = uri;
- if (result.startsWith("/")) {
- result = result.substring(1);
- }
- if (result.endsWith("/")) {
- result = result.substring(0, result.length() - 1);
- }
- return result;
- }
-
- /**
- * Removes all listeners.
- */
- @SuppressWarnings("checkstyle:IllegalCatch")
- public static void removeAllListeners() {
- for (final ListenerAdapter listener : dataChangeListener.values()) {
- try {
- listener.close();
- } catch (final Exception e) {
- LOG.error("Failed to close listener", e);
- }
- }
- try {
- LOCK.lock();
- dataChangeListener = new ConcurrentHashMap<>();
- } finally {
- LOCK.unlock();
- }
- }
-
- /**
- * Delete {@link ListenerAdapter} listener specified in parameter.
- *
- * @param <T>
- *
- * @param listener
- * ListenerAdapter
- */
- @SuppressWarnings("checkstyle:IllegalCatch")
- private static <T extends BaseListenerInterface> void deleteListener(final T listener) {
- if (listener != null) {
- try {
- listener.close();
- } catch (final Exception e) {
- LOG.error("Failed to close listener", e);
- }
- try {
- LOCK.lock();
- dataChangeListener.remove(listener.getStreamName());
- } finally {
- LOCK.unlock();
- }
- }
- }
-
- /**
- * Check if the listener specified by qnames of request exist.
- *
- * @param streamName
- * name of stream
- * @return True if the listener exist, false otherwise.
- */
- public static boolean existNotificationListenerFor(final String streamName) {
- return notificationListenersByStreamName.containsKey(streamName);
- }
-
- /**
- * Prepare listener for notification ({@link NotificationDefinition}).
- *
- * @param paths
- * paths of notifications
- * @param streamName
- * name of stream (generated by paths)
- * @param outputType
- * type of output for onNotification - XML or JSON
- * @return List of {@link NotificationListenerAdapter} by paths
- */
- public static List<NotificationListenerAdapter> createNotificationListener(final List<Absolute> paths,
- final String streamName, final String outputType, final ControllerContext controllerContext) {
- final List<NotificationListenerAdapter> listListeners = new ArrayList<>();
- for (final Absolute path : paths) {
- final NotificationListenerAdapter listener =
- new NotificationListenerAdapter(path, streamName, outputType, controllerContext);
- listListeners.add(listener);
- }
- try {
- LOCK.lock();
- notificationListenersByStreamName.put(streamName, listListeners);
- } finally {
- LOCK.unlock();
- }
- return listListeners;
- }
-
- public static <T extends BaseListenerInterface> void removeListenerIfNoSubscriberExists(final T listener) {
- if (!listener.hasSubscribers()) {
- if (listener instanceof NotificationListenerAdapter) {
- deleteNotificationListener(listener);
- } else {
- deleteListener(listener);
- }
- }
- }
-
- @SuppressWarnings("checkstyle:IllegalCatch")
- private static <T extends BaseListenerInterface> void deleteNotificationListener(final T listener) {
- if (listener != null) {
- try {
- listener.close();
- } catch (final Exception e) {
- LOG.error("Failed to close listener", e);
- }
- try {
- LOCK.lock();
- notificationListenersByStreamName.remove(listener.getStreamName());
- } finally {
- LOCK.unlock();
- }
- }
- }
-
- public static List<NotificationListenerAdapter> getNotificationListenerFor(final String streamName) {
- return notificationListenersByStreamName.get(streamName);
- }
-}
Code Review / netconf.git / blobdiff