Java tutorial
/* * Copyright 2011-2019 the original author or authors. * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * https://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ package org.springframework.data.redis.listener; import lombok.EqualsAndHashCode; import org.springframework.util.Assert; /** * Channel topic implementation (maps to a Redis channel). * * @author Costin Leau * @author Mark Paluch */ @EqualsAndHashCode public class ChannelTopic implements Topic { private final String channelName; /** * Constructs a new {@link ChannelTopic} instance. * * @param name must not be {@literal null}. */ public ChannelTopic(String name) { Assert.notNull(name, "Topic name must not be null!"); this.channelName = name; } /** * Create a new {@link ChannelTopic} for channel subscriptions. * * @param name the channel name, must not be {@literal null} or empty. * @return the {@link ChannelTopic} for {@code channelName}. * @since 2.1 */ public static ChannelTopic of(String name) { return new ChannelTopic(name); } /** * @return topic name. */ @Override public String getTopic() { return channelName; } /* * (non-Javadoc) * @see java.lang.Object#toString() */ @Override public String toString() { return channelName; } }