gongxuanzhang commented on code in PR #19226: URL: https://github.com/apache/kafka/pull/19226#discussion_r2022688061
########## server-common/src/main/java/org/apache/kafka/server/purgatory/DelayedDeleteRecords.java: ########## @@ -0,0 +1,112 @@ +/* + * 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.kafka.server.purgatory; + +import org.apache.kafka.common.TopicPartition; +import org.apache.kafka.common.message.DeleteRecordsResponseData.DeleteRecordsPartitionResult; +import org.apache.kafka.common.protocol.Errors; +import org.apache.kafka.server.metrics.KafkaMetricsGroup; + +import com.yammer.metrics.core.Meter; + +import org.slf4j.Logger; +import org.slf4j.LoggerFactory; + +import java.util.Collections; +import java.util.Map; +import java.util.concurrent.TimeUnit; +import java.util.function.BiConsumer; +import java.util.function.Consumer; +import java.util.stream.Collectors; + +/** + * A delayed delete records operation that can be created by the replica manager and watched + * in the delete records operation purgatory + */ +public class DelayedDeleteRecords extends DelayedOperation { + + private static final Logger LOG = LoggerFactory.getLogger(DelayedDeleteRecords.class); + + // migration from kafka.server.DelayedDeleteRecordsMetrics + private static final KafkaMetricsGroup METRICS_GROUP = new KafkaMetricsGroup("kafka.server", "DelayedDeleteRecordsMetrics"); + private static final Meter AGGREGATE_EXPIRATION_METER = METRICS_GROUP.newMeter("ExpiresPerSec", "requests", + TimeUnit.SECONDS); + + private final Map<TopicPartition, DeleteRecordsPartitionStatus> deleteRecordsStatus; + private final BiConsumer<TopicPartition, DeleteRecordsPartitionStatus> onAcksPending; + private final Consumer<Map<TopicPartition, DeleteRecordsPartitionResult>> responseCallback; + + public DelayedDeleteRecords(long delayMs, + Map<TopicPartition, DeleteRecordsPartitionStatus> deleteRecordsStatus, + // To maintain compatibility with dependency packages, the logic has been moved to the caller. + BiConsumer<TopicPartition, DeleteRecordsPartitionStatus> onAcksPending, + Consumer<Map<TopicPartition, DeleteRecordsPartitionResult>> responseCallback) { + super(delayMs); + this.onAcksPending = onAcksPending; + this.deleteRecordsStatus = Collections.unmodifiableMap(deleteRecordsStatus); + this.responseCallback = responseCallback; + // first update the acks pending variable according to the error code + deleteRecordsStatus.forEach((topicPartition, status) -> { + if (status.responseStatus().errorCode() == Errors.NONE.code()) { + // Timeout error state will be cleared when required acks are received + status.setAcksPending(true); + status.responseStatus().setErrorCode(Errors.REQUEST_TIMED_OUT.code()); + } else { + status.setAcksPending(false); + } + }); + } + + /** + * The delayed delete records operation can be completed if every partition specified in the request satisfied one of the following: + * + * 1) There was an error while checking if all replicas have caught up to the deleteRecordsOffset: set an error in response + * 2) The low watermark of the partition has caught up to the deleteRecordsOffset. set the low watermark in response + * + */ + @Override + public boolean tryComplete() { + // check for each partition if it still has pending acks + deleteRecordsStatus.forEach((topicPartition, status) -> { + LOG.trace("Checking delete records satisfaction for {}, current status {}", topicPartition, status); + // skip those partitions that have already been satisfied + if (status.acksPending()) { + onAcksPending.accept(topicPartition, status); + } + }); + // check if every partition has satisfied at least one of case A or B + return deleteRecordsStatus.values().stream().noneMatch(DeleteRecordsPartitionStatus::acksPending) && forceComplete(); + } + + @Override + public void onExpiration() { + deleteRecordsStatus.forEach((topicPartition, status) -> { Review Comment: excellent！ -- 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: jira-unsubscr...@kafka.apache.org For queries about this service, please contact Infrastructure at: us...@infra.apache.org
