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Easy Redis Java client and Real-Time Data Platform. Valkey compatible. Sync/Async/RxJava3/Reactive API. Client side caching. Over 50 Redis based Java objects and services: JCache API, Apache Tomcat, Hibernate, Spring, Set, Multimap, SortedSet, Map, List, Queue, Deque, Semaphore, Lock, AtomicLong, Map Reduce, Bloom filter, Scheduler, RPC
/**
* Copyright (c) 2013-2024 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.mapreduce;
import org.redisson.api.RListMultimap;
import org.redisson.api.RMap;
import org.redisson.api.RedissonClient;
import org.redisson.api.annotation.RInject;
import org.redisson.api.mapreduce.RReducer;
import org.redisson.client.codec.Codec;
import org.redisson.misc.Injector;
import java.io.Serializable;
import java.time.Duration;
import java.util.List;
/**
*
* @author Nikita Koksharov
*
* @param key
* @param value
*/
public class ReducerTask implements Runnable, Serializable {
private static final long serialVersionUID = 3556632668150314703L;
@RInject
private RedissonClient redisson;
private String name;
private String resultMapName;
private RReducer reducer;
private Class> codecClass;
private Codec codec;
private long timeout;
public ReducerTask() {
}
public ReducerTask(String name, RReducer reducer, Class> codecClass, String resultMapName, long timeout) {
this.name = name;
this.reducer = reducer;
this.resultMapName = resultMapName;
this.codecClass = codecClass;
this.timeout = timeout;
}
@Override
public void run() {
try {
this.codec = (Codec) codecClass.getConstructor().newInstance();
} catch (Exception e) {
throw new IllegalArgumentException(e);
}
Injector.inject(reducer, redisson);
RMap map = redisson.getMap(resultMapName);
RListMultimap multimap = redisson.getListMultimap(name, codec);
for (KOut key : multimap.keySet()) {
if (Thread.currentThread().isInterrupted()) {
break;
}
List values = multimap.get(key);
VOut out = reducer.reduce(key, values.iterator());
map.put(key, out);
}
if (timeout > 0) {
map.expire(Duration.ofMillis(timeout));
}
multimap.delete();
}
}
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