sfc-gh-mbobowski commented on code in PR #10077: URL: https://github.com/apache/nifi/pull/10077#discussion_r2300963435
########## nifi-extension-bundles/nifi-aws-bundle/nifi-aws-kinesis/src/main/java/org/apache/nifi/processors/aws/kinesis/MemoryBoundRecordBuffer.java: ########## @@ -0,0 +1,672 @@ +/* + * 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.nifi.processors.aws.kinesis; + +import jakarta.annotation.Nullable; +import org.apache.nifi.logging.ComponentLog; +import org.apache.nifi.processors.aws.kinesis.RecordBuffer.ShardBufferId; +import org.apache.nifi.processors.aws.kinesis.RecordBuffer.ShardBufferLease; +import software.amazon.kinesis.exceptions.InvalidStateException; +import software.amazon.kinesis.exceptions.KinesisClientLibDependencyException; +import software.amazon.kinesis.exceptions.ShutdownException; +import software.amazon.kinesis.exceptions.ThrottlingException; +import software.amazon.kinesis.processor.RecordProcessorCheckpointer; +import software.amazon.kinesis.retrieval.KinesisClientRecord; + +import java.nio.ByteBuffer; +import java.time.Duration; +import java.util.ArrayList; +import java.util.Collection; +import java.util.HashSet; +import java.util.List; +import java.util.Optional; +import java.util.Queue; +import java.util.Random; +import java.util.Set; +import java.util.concurrent.ConcurrentHashMap; +import java.util.concurrent.ConcurrentLinkedQueue; +import java.util.concurrent.ConcurrentMap; +import java.util.concurrent.CountDownLatch; +import java.util.concurrent.TimeUnit; +import java.util.concurrent.atomic.AtomicBoolean; +import java.util.concurrent.atomic.AtomicInteger; +import java.util.concurrent.atomic.AtomicLong; +import java.util.concurrent.atomic.AtomicReference; + +import static java.util.Collections.emptyList; + +/** + * A record buffer which limits the maximum memory usage across all shard buffers. + * If the memory limit is reached, adding new records will block until enough memory is freed. + */ +final class MemoryBoundRecordBuffer implements RecordBuffer.ForKinesisClientLibrary, RecordBuffer.ForProcessor { + + private final ComponentLog logger; + + private final long checkpointIntervalMillis; + private final BlockingMemoryTracker memoryTracker; + + private final AtomicLong bufferIdCounter = new AtomicLong(0); + private final ConcurrentMap<ShardBufferId, ShardBuffer> shardBuffers = new ConcurrentHashMap<>(); + + /** + * A queue with ids shard buffers available for leasing. + * <p> + * Note: when a buffer is invalidated its id is NOT removed from the queue immediately. + */ + private final Queue<ShardBufferId> buffersToLease = new ConcurrentLinkedQueue<>(); + + MemoryBoundRecordBuffer(final ComponentLog logger, final long maxMemoryBytes, final Duration checkpointInterval) { + this.logger = logger; + this.memoryTracker = new BlockingMemoryTracker(logger, maxMemoryBytes); + this.checkpointIntervalMillis = checkpointInterval.toMillis(); + } + + @Override + public ShardBufferId createBuffer(final String shardId) { + final ShardBufferId id = new ShardBufferId(shardId, bufferIdCounter.getAndIncrement()); + + logger.info("Creating new buffer for shard {} with id {}", shardId, id); + + shardBuffers.put(id, new ShardBuffer(id, logger, checkpointIntervalMillis)); + buffersToLease.add(id); + return id; + } + + @Override + public void addRecords(final ShardBufferId bufferId, final List<KinesisClientRecord> records, final RecordProcessorCheckpointer checkpointer) { + if (records.isEmpty()) { + return; + } + + final ShardBuffer buffer = shardBuffers.get(bufferId); + if (buffer == null) { + logger.debug("Buffer with id {} not found. Cannot add records with sequence and subsequence numbers: {}.{} - {}.{}", Review Comment: Is it an expected outcome? Sounds like a warning to me. -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: [email protected] For queries about this service, please contact Infrastructure at: [email protected]
