kafka FenceProducersHandler 源码

kafka FenceProducersHandler 代码

文件路径：/clients/src/main/java/org/apache/kafka/clients/admin/internals/FenceProducersHandler.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.clients.admin.internals;

import org.apache.kafka.common.Node;
import org.apache.kafka.common.errors.ClusterAuthorizationException;
import org.apache.kafka.common.errors.TransactionalIdAuthorizationException;
import org.apache.kafka.common.message.InitProducerIdRequestData;
import org.apache.kafka.common.protocol.Errors;
import org.apache.kafka.common.requests.AbstractResponse;
import org.apache.kafka.common.requests.FindCoordinatorRequest;
import org.apache.kafka.common.requests.InitProducerIdRequest;
import org.apache.kafka.common.requests.InitProducerIdResponse;
import org.apache.kafka.common.utils.LogContext;
import org.apache.kafka.common.utils.ProducerIdAndEpoch;
import org.slf4j.Logger;

import java.util.Collection;
import java.util.Collections;
import java.util.Map;
import java.util.Set;
import java.util.stream.Collectors;

public class FenceProducersHandler extends AdminApiHandler.Unbatched<CoordinatorKey, ProducerIdAndEpoch> {
    private final Logger log;
    private final AdminApiLookupStrategy<CoordinatorKey> lookupStrategy;

    public FenceProducersHandler(
        LogContext logContext
    ) {
        this.log = logContext.logger(FenceProducersHandler.class);
        this.lookupStrategy = new CoordinatorStrategy(FindCoordinatorRequest.CoordinatorType.TRANSACTION, logContext);
    }

    public static AdminApiFuture.SimpleAdminApiFuture<CoordinatorKey, ProducerIdAndEpoch> newFuture(
        Collection<String> transactionalIds
    ) {
        return AdminApiFuture.forKeys(buildKeySet(transactionalIds));
    }

    private static Set<CoordinatorKey> buildKeySet(Collection<String> transactionalIds) {
        return transactionalIds.stream()
            .map(CoordinatorKey::byTransactionalId)
            .collect(Collectors.toSet());
    }

    @Override
    public String apiName() {
        return "fenceProducer";
    }

    @Override
    public AdminApiLookupStrategy<CoordinatorKey> lookupStrategy() {
        return lookupStrategy;
    }

    @Override
    InitProducerIdRequest.Builder buildSingleRequest(int brokerId, CoordinatorKey key) {
        if (key.type != FindCoordinatorRequest.CoordinatorType.TRANSACTION) {
            throw new IllegalArgumentException("Invalid group coordinator key " + key +
                    " when building `InitProducerId` request");
        }
        InitProducerIdRequestData data = new InitProducerIdRequestData()
            // Because we never include a producer epoch or ID in this request, we expect that some errors
            // (such as PRODUCER_FENCED) will never be returned in the corresponding broker response.
            // If we ever modify this logic to include an epoch or producer ID, we will need to update the
            // error handling logic for this handler to accommodate these new errors.
            .setProducerEpoch(ProducerIdAndEpoch.NONE.epoch)
            .setProducerId(ProducerIdAndEpoch.NONE.producerId)
            .setTransactionalId(key.idValue)
            // Set transaction timeout to 1 since it's only being initialized to fence out older producers with the same transactional ID,
            // and shouldn't be used for any actual record writes
            .setTransactionTimeoutMs(1);
        return new InitProducerIdRequest.Builder(data);
    }

    @Override
    public ApiResult<CoordinatorKey, ProducerIdAndEpoch> handleSingleResponse(
        Node broker,
        CoordinatorKey key,
        AbstractResponse abstractResponse
    ) {
        InitProducerIdResponse response = (InitProducerIdResponse) abstractResponse;

        Errors error = Errors.forCode(response.data().errorCode());
        if (error != Errors.NONE) {
            return handleError(key, error);
        }

        Map<CoordinatorKey, ProducerIdAndEpoch> completed = Collections.singletonMap(key, new ProducerIdAndEpoch(
            response.data().producerId(),
            response.data().producerEpoch()
        ));

        return new ApiResult<>(completed, Collections.emptyMap(), Collections.emptyList());
    }

    private ApiResult<CoordinatorKey, ProducerIdAndEpoch> handleError(
        CoordinatorKey transactionalIdKey,
        Errors error
    ) {
        switch (error) {
            case CLUSTER_AUTHORIZATION_FAILED:
                return ApiResult.failed(transactionalIdKey, new ClusterAuthorizationException(
                        "InitProducerId request for transactionalId `" + transactionalIdKey.idValue + "` " +
                                "failed due to cluster authorization failure"));

            case TRANSACTIONAL_ID_AUTHORIZATION_FAILED:
                return ApiResult.failed(transactionalIdKey, new TransactionalIdAuthorizationException(
                        "InitProducerId request for transactionalId `" + transactionalIdKey.idValue + "` " +
                                "failed due to transactional ID authorization failure"));

            case COORDINATOR_LOAD_IN_PROGRESS:
                // If the coordinator is in the middle of loading, then we just need to retry
                log.debug("InitProducerId request for transactionalId `{}` failed because the " +
                                "coordinator is still in the process of loading state. Will retry",
                        transactionalIdKey.idValue);
                return ApiResult.empty();

            case NOT_COORDINATOR:
            case COORDINATOR_NOT_AVAILABLE:
                // If the coordinator is unavailable or there was a coordinator change, then we unmap
                // the key so that we retry the `FindCoordinator` request
                log.debug("InitProducerId request for transactionalId `{}` returned error {}. Will attempt " +
                        "to find the coordinator again and retry", transactionalIdKey.idValue, error);
                return ApiResult.unmapped(Collections.singletonList(transactionalIdKey));

            // We intentionally omit cases for PRODUCER_FENCED, TRANSACTIONAL_ID_NOT_FOUND, and INVALID_PRODUCER_EPOCH
            // since those errors should never happen when our InitProducerIdRequest doesn't include a producer epoch or ID
            // and should therefore fall under the "unexpected error" catch-all case below

            default:
                return ApiResult.failed(transactionalIdKey, error.exception("InitProducerId request for " +
                        "transactionalId `" + transactionalIdKey.idValue + "` failed due to unexpected error"));
        }
    }
}

相关信息

kafka 源码目录

相关文章

kafka AbortTransactionHandler 源码

kafka AdminApiDriver 源码

kafka AdminApiFuture 源码

kafka AdminApiHandler 源码

kafka AdminApiLookupStrategy 源码

kafka AdminMetadataManager 源码

kafka AllBrokersStrategy 源码

kafka AlterConsumerGroupOffsetsHandler 源码

kafka ApiRequestScope 源码

kafka CoordinatorKey 源码