| /** |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you 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.apache.pulsar.io.redis.sink; |
| |
| import com.google.common.collect.Lists; |
| import io.lettuce.core.RedisFuture; |
| import lombok.extern.slf4j.Slf4j; |
| import org.apache.commons.collections.CollectionUtils; |
| import org.apache.pulsar.functions.api.Record; |
| import org.apache.pulsar.io.core.Sink; |
| import org.apache.pulsar.io.core.SinkContext; |
| import org.apache.pulsar.io.core.annotations.Connector; |
| import org.apache.pulsar.io.core.annotations.IOType; |
| import org.apache.pulsar.io.redis.RedisSession; |
| |
| import java.nio.charset.StandardCharsets; |
| import java.util.List; |
| import java.util.Map; |
| import java.util.concurrent.ConcurrentHashMap; |
| import java.util.concurrent.Executors; |
| import java.util.concurrent.ScheduledExecutorService; |
| import java.util.concurrent.TimeUnit; |
| |
| /** |
| * A Simple Redis sink, which stores the key/value records from Pulsar in redis. |
| * Note that records from Pulsar with null keys or values will be ignored. |
| * This class expects records from Pulsar to have a key and value that are stored as bytes or a string. |
| */ |
| @Connector( |
| name = "redis", |
| type = IOType.SINK, |
| help = "A sink connector is used for moving messages from Pulsar to Redis.", |
| configClass = RedisSinkConfig.class |
| ) |
| @Slf4j |
| public class RedisSink implements Sink<byte[]> { |
| |
| private RedisSinkConfig redisSinkConfig; |
| |
| private RedisSession redisSession; |
| |
| private long batchTimeMs; |
| |
| private long operationTimeoutMs; |
| |
| private int batchSize; |
| |
| private List<Record<byte[]>> incomingList; |
| |
| private ScheduledExecutorService flushExecutor; |
| |
| @Override |
| public void open(Map<String, Object> config, SinkContext sinkContext) throws Exception { |
| log.info("Open Redis Sink"); |
| |
| redisSinkConfig = RedisSinkConfig.load(config); |
| redisSinkConfig.validate(); |
| |
| redisSession = RedisSession.create(redisSinkConfig); |
| |
| operationTimeoutMs = redisSinkConfig.getOperationTimeout(); |
| |
| batchTimeMs = redisSinkConfig.getBatchTimeMs(); |
| batchSize = redisSinkConfig.getBatchSize(); |
| incomingList = Lists.newArrayList(); |
| flushExecutor = Executors.newScheduledThreadPool(1); |
| flushExecutor.scheduleAtFixedRate(() -> flush(), batchTimeMs, batchTimeMs, TimeUnit.MILLISECONDS); |
| } |
| |
| @Override |
| public void write(Record<byte[]> record) throws Exception { |
| int currentSize; |
| synchronized (this) { |
| incomingList.add(record); |
| currentSize = incomingList.size(); |
| } |
| if (currentSize == batchSize) { |
| flushExecutor.submit(() -> flush()); |
| } |
| } |
| |
| @Override |
| public void close() throws Exception { |
| if (null != redisSession) { |
| redisSession.close(); |
| } |
| |
| if (null != flushExecutor) { |
| flushExecutor.shutdown(); |
| } |
| } |
| |
| private void flush() { |
| final Map<byte[], byte[]> recordsToSet = new ConcurrentHashMap<>(); |
| final List<Record<byte[]>> recordsToFlush; |
| |
| synchronized (this) { |
| if (incomingList.isEmpty()) { |
| return; |
| } |
| recordsToFlush = incomingList; |
| incomingList = Lists.newArrayList(); |
| } |
| |
| if (CollectionUtils.isNotEmpty(recordsToFlush)) { |
| for (Record<byte[]> record: recordsToFlush) { |
| try { |
| // records with null keys or values will be ignored |
| byte[] key = record.getKey().isPresent() ? record.getKey().get().getBytes(StandardCharsets.UTF_8) : null; |
| byte[] value = record.getValue(); |
| recordsToSet.put(key, value); |
| } catch (Exception e) { |
| record.fail(); |
| recordsToFlush.remove(record); |
| log.warn("Record flush thread was exception ", e); |
| } |
| } |
| } |
| |
| try { |
| if (recordsToSet.size() > 0) { |
| if (log.isDebugEnabled()) { |
| log.debug("Calling mset with {} values", recordsToSet.size()); |
| } |
| |
| RedisFuture<?> future = redisSession.asyncCommands().mset(recordsToSet); |
| |
| if (!future.await(operationTimeoutMs, TimeUnit.MILLISECONDS) || future.getError() != null) { |
| log.warn("Operation failed with error {} or timeout {} is exceeded", future.getError(), operationTimeoutMs); |
| recordsToFlush.forEach(tRecord -> tRecord.fail()); |
| return; |
| } |
| } |
| recordsToFlush.forEach(tRecord -> tRecord.ack()); |
| recordsToSet.clear(); |
| recordsToFlush.clear(); |
| } catch (InterruptedException e) { |
| recordsToFlush.forEach(tRecord -> tRecord.fail()); |
| log.error("Redis mset data interrupted exception ", e); |
| } |
| } |
| } |