001/*
002 * Copyright 2002-2015 the original author or authors.
003 *
004 * Licensed under the Apache License, Version 2.0 (the "License");
005 * you may not use this file except in compliance with the License.
006 * You may obtain a copy of the License at
007 *
008 *      https://www.apache.org/licenses/LICENSE-2.0
009 *
010 * Unless required by applicable law or agreed to in writing, software
011 * distributed under the License is distributed on an "AS IS" BASIS,
012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013 * See the License for the specific language governing permissions and
014 * limitations under the License.
015 */
016
017package org.springframework.messaging.simp.user;
018
019import java.util.Collections;
020import java.util.Set;
021import java.util.concurrent.ConcurrentHashMap;
022import java.util.concurrent.ConcurrentMap;
023import java.util.concurrent.CopyOnWriteArraySet;
024
025import org.springframework.util.Assert;
026
027/**
028 * A default thread-safe implementation of {@link UserSessionRegistry}.
029 *
030 * @author Rossen Stoyanchev
031 * @since 4.0
032 * @deprecated as of 4.2 this class is no longer used, see deprecation notes
033 * on {@link UserSessionRegistry} for more details.
034 */
035@Deprecated
036@SuppressWarnings({"deprecation", "unused"})
037public class DefaultUserSessionRegistry implements UserSessionRegistry {
038
039        // userId -> sessionId
040        private final ConcurrentMap<String, Set<String>> userSessionIds = new ConcurrentHashMap<String, Set<String>>();
041
042        private final Object lock = new Object();
043
044
045        @Override
046        public Set<String> getSessionIds(String user) {
047                Set<String> set = this.userSessionIds.get(user);
048                return (set != null ? set : Collections.<String>emptySet());
049        }
050
051        @Override
052        public void registerSessionId(String user, String sessionId) {
053                Assert.notNull(user, "User must not be null");
054                Assert.notNull(sessionId, "Session ID must not be null");
055                synchronized (this.lock) {
056                        Set<String> set = this.userSessionIds.get(user);
057                        if (set == null) {
058                                set = new CopyOnWriteArraySet<String>();
059                                this.userSessionIds.put(user, set);
060                        }
061                        set.add(sessionId);
062                }
063        }
064
065        @Override
066        public void unregisterSessionId(String userName, String sessionId) {
067                Assert.notNull(userName, "User Name must not be null");
068                Assert.notNull(sessionId, "Session ID must not be null");
069                synchronized (lock) {
070                        Set<String> set = this.userSessionIds.get(userName);
071                        if (set != null) {
072                                if (set.remove(sessionId) && set.isEmpty()) {
073                                        this.userSessionIds.remove(userName);
074                                }
075                        }
076                }
077        }
078
079}