org.redisson.reactive.RedissonKeysReactive Maven / Gradle / Ivy

Go to download
Show more of this group Show more artifacts with this name
Show all versions of killbill-platform-service-registry Show documentation
There is a newer version: 0.40.13
Show newest version
/**
 * Copyright 2018 Nikita Koksharov
 *
 * 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.redisson.reactive;

import java.util.ArrayList;
import java.util.List;
import java.util.function.Consumer;
import java.util.function.LongConsumer;

import org.reactivestreams.Publisher;
import org.redisson.RedissonKeys;
import org.redisson.client.RedisClient;
import org.redisson.client.protocol.decoder.ListScanResult;
import org.redisson.connection.MasterSlaveEntry;

import io.netty.util.concurrent.Future;
import io.netty.util.concurrent.FutureListener;
import reactor.core.publisher.Flux;
import reactor.core.publisher.FluxSink;

/**
 * 
 * @author Nikita Koksharov
 *
 */
public class RedissonKeysReactive {

    private final CommandReactiveExecutor commandExecutor;

    private final RedissonKeys instance;

    public RedissonKeysReactive(CommandReactiveExecutor commandExecutor) {
        super();
        instance = new RedissonKeys(commandExecutor);
        this.commandExecutor = commandExecutor;
    }

    public Flux getKeysByPattern(String pattern) {
        return getKeysByPattern(pattern, 10);
    }
    
    public Flux getKeysByPattern(String pattern, int count) {
        List> publishers = new ArrayList>();
        for (MasterSlaveEntry entry : commandExecutor.getConnectionManager().getEntrySet()) {
            publishers.add(createKeysIterator(entry, pattern, count));
        }
        return Flux.merge(publishers);
    }

    private Flux createKeysIterator(final MasterSlaveEntry entry, final String pattern, final int count) {
        return Flux.create(new Consumer>() {
            
            @Override
            public void accept(FluxSink emitter) {
                emitter.onRequest(new LongConsumer() {
                    
                    private RedisClient client;
                    private List firstValues;
                    private long nextIterPos;
                    
                    private long currentIndex;
                    
                    @Override
                    public void accept(long value) {
                        currentIndex = value;
                        nextValues(emitter);
                    }
                    
                    protected void nextValues(FluxSink emitter) {
                        instance.scanIteratorAsync(client, entry, nextIterPos, pattern, count).addListener(new FutureListener>() {

                            @Override
                            public void operationComplete(Future> future) throws Exception {
                                if (!future.isSuccess()) {
                                    emitter.error(future.cause());
                                    return;
                                }
                                
                                ListScanResult