org.springframework.data.redis.connection.lettuce.LettuceReactivePubSubCommands Maven / Gradle / Ivy
/*
* Copyright 2018 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
*
* http://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.connection.lettuce;
import io.lettuce.core.pubsub.api.reactive.RedisPubSubReactiveCommands;
import lombok.NonNull;
import lombok.RequiredArgsConstructor;
import reactor.core.publisher.Flux;
import reactor.core.publisher.Mono;
import java.nio.ByteBuffer;
import java.util.function.Function;
import org.reactivestreams.Publisher;
import org.springframework.data.redis.connection.ReactivePubSubCommands;
import org.springframework.data.redis.connection.ReactiveSubscription;
import org.springframework.data.redis.connection.ReactiveSubscription.ChannelMessage;
import org.springframework.util.Assert;
/**
* @author Mark Paluch
* @author Christoph Strobl
* @since 2.1
*/
@RequiredArgsConstructor
class LettuceReactivePubSubCommands implements ReactivePubSubCommands {
private final @NonNull LettuceReactiveRedisConnection connection;
/*
* (non-Javadoc)
* @see org.springframework.data.redis.connection.ReactivePubSubCommands#createSubscription()
*/
@Override
public Mono createSubscription() {
return connection.getPubSubConnection()
.map(pubSubConnection -> new LettuceReactiveSubscription(pubSubConnection.reactive(),
connection.translateException()));
}
/*
* (non-Javadoc)
* @see org.springframework.data.redis.connection.ReactivePubSubCommands#publish(org.reactivestreams.Publisher)
*/
@Override
public Flux publish(Publisher> messageStream) {
Assert.notNull(messageStream, "ChannelMessage stream must not be null!");
return connection.getCommands().flatMapMany(commands -> Flux.from(messageStream)
.flatMap(message -> commands.publish(message.getChannel(), message.getMessage())));
}
/*
* (non-Javadoc)
* @see org.springframework.data.redis.connection.ReactivePubSubCommands#subscribe(java.nio.ByteBuffer[])
*/
@Override
public Mono subscribe(ByteBuffer... channels) {
Assert.notNull(channels, "Channels must not be null!");
return doWithPubSub(commands -> commands.subscribe(channels));
}
/*
* (non-Javadoc)
* @see org.springframework.data.redis.connection.ReactivePubSubCommands#pSubscribe(java.nio.ByteBuffer[])
*/
@Override
public Mono pSubscribe(ByteBuffer... patterns) {
Assert.notNull(patterns, "Patterns must not be null!");
return doWithPubSub(commands -> commands.psubscribe(patterns));
}
private Mono doWithPubSub(Function, Mono> function) {
return connection.getPubSubConnection().flatMap(pubSubConnection -> function.apply(pubSubConnection.reactive()))
.onErrorMap(connection.translateException());
}
}