kafka ElectLeadersRequest 源码

  • 2022-10-20
  • 浏览 (399)

kafka ElectLeadersRequest 代码

文件路径:/clients/src/main/java/org/apache/kafka/common/requests/ElectLeadersRequest.java

/*
 * 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.common.requests;

import java.nio.ByteBuffer;
import java.util.ArrayList;
import java.util.Collection;
import java.util.List;
import org.apache.kafka.common.ElectionType;
import org.apache.kafka.common.TopicPartition;
import org.apache.kafka.common.errors.UnsupportedVersionException;
import org.apache.kafka.common.message.ElectLeadersRequestData.TopicPartitions;
import org.apache.kafka.common.message.ElectLeadersRequestData;
import org.apache.kafka.common.message.ElectLeadersResponseData.PartitionResult;
import org.apache.kafka.common.message.ElectLeadersResponseData.ReplicaElectionResult;
import org.apache.kafka.common.protocol.ApiKeys;
import org.apache.kafka.common.protocol.ByteBufferAccessor;
import org.apache.kafka.common.protocol.MessageUtil;

public class ElectLeadersRequest extends AbstractRequest {
    public static class Builder extends AbstractRequest.Builder<ElectLeadersRequest> {
        private final ElectionType electionType;
        private final Collection<TopicPartition> topicPartitions;
        private final int timeoutMs;

        public Builder(ElectionType electionType, Collection<TopicPartition> topicPartitions, int timeoutMs) {
            super(ApiKeys.ELECT_LEADERS);
            this.electionType = electionType;
            this.topicPartitions = topicPartitions;
            this.timeoutMs = timeoutMs;
        }

        @Override
        public ElectLeadersRequest build(short version) {
            return new ElectLeadersRequest(toRequestData(version), version);
        }

        @Override
        public String toString() {
            return "ElectLeadersRequest("
                + "electionType=" + electionType
                + ", topicPartitions=" + ((topicPartitions == null) ? "null" : MessageUtil.deepToString(topicPartitions.iterator()))
                + ", timeoutMs=" + timeoutMs
                + ")";
        }

        private ElectLeadersRequestData toRequestData(short version) {
            if (electionType != ElectionType.PREFERRED && version == 0) {
                throw new UnsupportedVersionException("API Version 0 only supports PREFERRED election type");
            }

            ElectLeadersRequestData data = new ElectLeadersRequestData()
                .setTimeoutMs(timeoutMs);

            if (topicPartitions != null) {
                topicPartitions.forEach(tp -> {
                    ElectLeadersRequestData.TopicPartitions tps = data.topicPartitions().find(tp.topic());
                    if (tps == null) {
                        tps = new ElectLeadersRequestData.TopicPartitions().setTopic(tp.topic());
                        data.topicPartitions().add(tps);
                    }
                    tps.partitions().add(tp.partition());
                });
            } else {
                data.setTopicPartitions(null);
            }

            data.setElectionType(electionType.value);

            return data;
        }
    }

    private final ElectLeadersRequestData data;

    private ElectLeadersRequest(ElectLeadersRequestData data, short version) {
        super(ApiKeys.ELECT_LEADERS, version);
        this.data = data;
    }

    @Override
    public ElectLeadersRequestData data() {
        return data;
    }

    @Override
    public AbstractResponse getErrorResponse(int throttleTimeMs, Throwable e) {
        ApiError apiError = ApiError.fromThrowable(e);
        List<ReplicaElectionResult> electionResults = new ArrayList<>();

        if (data.topicPartitions() != null) {
            for (TopicPartitions topic : data.topicPartitions()) {
                ReplicaElectionResult electionResult = new ReplicaElectionResult();

                electionResult.setTopic(topic.topic());
                for (Integer partitionId : topic.partitions()) {
                    PartitionResult partitionResult = new PartitionResult();
                    partitionResult.setPartitionId(partitionId);
                    partitionResult.setErrorCode(apiError.error().code());
                    partitionResult.setErrorMessage(apiError.message());

                    electionResult.partitionResult().add(partitionResult);
                }

                electionResults.add(electionResult);
            }
        }

        return new ElectLeadersResponse(throttleTimeMs, apiError.error().code(), electionResults, version());
    }

    public static ElectLeadersRequest parse(ByteBuffer buffer, short version) {
        return new ElectLeadersRequest(new ElectLeadersRequestData(new ByteBufferAccessor(buffer), version), version);
    }
}

相关信息

kafka 源码目录

相关文章

kafka AbstractControlRequest 源码

kafka AbstractRequest 源码

kafka AbstractRequestResponse 源码

kafka AbstractResponse 源码

kafka AddOffsetsToTxnRequest 源码

kafka AddOffsetsToTxnResponse 源码

kafka AddPartitionsToTxnRequest 源码

kafka AddPartitionsToTxnResponse 源码

kafka AllocateProducerIdsRequest 源码

kafka AllocateProducerIdsResponse 源码

0  赞