io.lettuce.core.pubsub.RedisPubSubReactiveCommandsImpl Maven / Gradle / Ivy

Go to download
Show more of this group Show more artifacts with this name
Show all versions of lettuce-core Show documentation
Advanced and thread-safe Java Redis client for synchronous, asynchronous, and reactive usage. Supports Cluster, Sentinel, Pipelining, Auto-Reconnect, Codecs and much more.
The newest version!
/*
 * Copyright 2011-Present, Redis Ltd. and Contributors
 * All rights reserved.
 *
 * Licensed under the MIT License.
 *
 * This file contains contributions from third-party contributors
 * 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 io.lettuce.core.pubsub;

import java.util.Map;

import reactor.core.publisher.Flux;
import reactor.core.publisher.FluxSink;
import reactor.core.publisher.Mono;
import io.lettuce.core.RedisReactiveCommandsImpl;
import io.lettuce.core.codec.RedisCodec;
import io.lettuce.core.protocol.Command;
import io.lettuce.core.pubsub.api.reactive.ChannelMessage;
import io.lettuce.core.pubsub.api.reactive.PatternMessage;
import io.lettuce.core.pubsub.api.reactive.RedisPubSubReactiveCommands;

/**
 * A reactive and thread-safe API for a Redis pub/sub connection.
 *
 * @param  Key type.
 * @param  Value type.
 * @author Mark Paluch
 * @author Ali Takavci
 * @since 5.0
 */
public class RedisPubSubReactiveCommandsImpl extends RedisReactiveCommandsImpl
        implements RedisPubSubReactiveCommands {

    private final PubSubCommandBuilder commandBuilder;

    /**
     * Initialize a new connection.
     *
     * @param connection the connection .
     * @param codec Codec used to encode/decode keys and values.
     */
    public RedisPubSubReactiveCommandsImpl(StatefulRedisPubSubConnection connection, RedisCodec codec) {
        super(connection, codec, null);
        this.commandBuilder = new PubSubCommandBuilder<>(codec);
    }

    @Override
    public Flux> observePatterns() {
        return observePatterns(FluxSink.OverflowStrategy.BUFFER);
    }

    @Override
    public Flux> observePatterns(FluxSink.OverflowStrategy overflowStrategy) {

        return Flux.create(sink -> {

            RedisPubSubAdapter listener = new RedisPubSubAdapter() {

                @Override
                public void message(K pattern, K channel, V message) {
                    sink.next(new PatternMessage<>(pattern, channel, message));
                }

            };

            StatefulRedisPubSubConnection statefulConnection = getStatefulConnection();
            statefulConnection.addListener(listener);

            sink.onDispose(() -> {
                statefulConnection.removeListener(listener);
            });

        }, overflowStrategy);
    }

    @Override
    public Flux> observeChannels() {
        return observeChannels(FluxSink.OverflowStrategy.BUFFER);
    }

    @Override
    public Flux> observeChannels(FluxSink.OverflowStrategy overflowStrategy) {

        return Flux.create(sink -> {

            RedisPubSubAdapter listener = new RedisPubSubAdapter() {

                @Override
                public void message(K channel, V message) {
                    sink.next(new ChannelMessage<>(channel, message));
                }

            };

            StatefulRedisPubSubConnection statefulConnection = getStatefulConnection();
            statefulConnection.addListener(listener);

            sink.onDispose(() -> {
                statefulConnection.removeListener(listener);
            });

        }, overflowStrategy);
    }

    @Override
    public Mono psubscribe(K... patterns) {
        return createMono(() -> commandBuilder.psubscribe(patterns)).then();
    }

    @Override
    public Mono punsubscribe(K... patterns) {
        return createFlux(() -> commandBuilder.punsubscribe(patterns)).then();
    }

    @Override
    public Mono subscribe(K... channels) {
        return createFlux(() -> commandBuilder.subscribe(channels)).then();
    }

    @Override
    public Mono unsubscribe(K... channels) {
        return createFlux(() -> commandBuilder.unsubscribe(channels)).then();
    }

    @Override
    public Mono publish(K channel, V message) {
        return createMono(() -> commandBuilder.publish(channel, message));
    }

    @Override
    public Flux pubsubChannels(K channel) {
        return createDissolvingFlux(() -> commandBuilder.pubsubChannels(channel));
    }

    @Override
    public Mono> pubsubNumsub(K... channels) {
        return createMono(() -> commandBuilder.pubsubNumsub(channels));
    }

    @Override
    public Flux pubsubShardChannels(K channel) {
        return createDissolvingFlux(() -> commandBuilder.pubsubShardChannels(channel));
    }

    @Override
    public Mono> pubsubShardNumsub(K... shardChannels) {
        return createMono(() -> commandBuilder.pubsubShardNumsub(shardChannels));
    }

    @Override
    public Mono spublish(K shardChannel, V message) {
        return createMono(() -> commandBuilder.spublish(shardChannel, message));
    }

    @Override
    public Mono ssubscribe(K... shardChannels) {
        return createFlux(() -> commandBuilder.ssubscribe(shardChannels)).then();
    }

    @Override
    public Mono sunsubscribe(K... shardChannels) {
        return createFlux(() -> commandBuilder.sunsubscribe(shardChannels)).then();
    }

    @Override
    @SuppressWarnings("unchecked")
    public StatefulRedisPubSubConnection getStatefulConnection() {
        return (StatefulRedisPubSubConnection) super.getStatefulConnection();
    }

}