kafka DescribeLogDirsResult 源码

kafka DescribeLogDirsResult 代码

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

import org.apache.kafka.common.KafkaFuture;
import org.apache.kafka.common.annotation.InterfaceStability;
import java.util.HashMap;
import java.util.Collection;
import java.util.Map;
import java.util.concurrent.ExecutionException;
import java.util.stream.Collectors;
import java.util.stream.Stream;

import org.apache.kafka.common.protocol.Errors;
import org.apache.kafka.common.requests.DescribeLogDirsResponse;


/**
 * The result of the {@link Admin#describeLogDirs(Collection)} call.
 *
 * The API of this class is evolving, see {@link Admin} for details.
 */
@InterfaceStability.Evolving
public class DescribeLogDirsResult {
    private final Map<Integer, KafkaFuture<Map<String, LogDirDescription>>> futures;

    DescribeLogDirsResult(Map<Integer, KafkaFuture<Map<String, LogDirDescription>>> futures) {
        this.futures = futures;
    }

    /**
     * Return a map from brokerId to future which can be used to check the information of partitions on each individual broker.
     * @deprecated Deprecated Since Kafka 2.7. Use {@link #descriptions()}.
     */
    @Deprecated
    @SuppressWarnings("deprecation")
    public Map<Integer, KafkaFuture<Map<String, DescribeLogDirsResponse.LogDirInfo>>> values() {
        return descriptions().entrySet().stream()
            .collect(Collectors.toMap(
                Map.Entry::getKey,
                entry -> entry.getValue().thenApply(map -> convertMapValues(map))));
    }

    @SuppressWarnings("deprecation")
    private Map<String, DescribeLogDirsResponse.LogDirInfo> convertMapValues(Map<String, LogDirDescription> map) {
        Stream<Map.Entry<String, LogDirDescription>> stream = map.entrySet().stream();
        return stream.collect(Collectors.toMap(
            Map.Entry::getKey,
            infoEntry -> {
                LogDirDescription logDir = infoEntry.getValue();
                return new DescribeLogDirsResponse.LogDirInfo(logDir.error() == null ? Errors.NONE : Errors.forException(logDir.error()),
                    logDir.replicaInfos().entrySet().stream().collect(Collectors.toMap(
                        Map.Entry::getKey,
                        replicaEntry -> new DescribeLogDirsResponse.ReplicaInfo(
                            replicaEntry.getValue().size(),
                            replicaEntry.getValue().offsetLag(),
                            replicaEntry.getValue().isFuture())
                )));
            }));
    }

    /**
     * Return a map from brokerId to future which can be used to check the information of partitions on each individual broker.
     * The result of the future is a map from broker log directory path to a description of that log directory.
     */
    public Map<Integer, KafkaFuture<Map<String, LogDirDescription>>> descriptions() {
        return futures;
    }

    /**
     * Return a future which succeeds only if all the brokers have responded without error
     * @deprecated Deprecated Since Kafka 2.7. Use {@link #allDescriptions()}.
     */
    @Deprecated
    @SuppressWarnings("deprecation")
    public KafkaFuture<Map<Integer, Map<String, DescribeLogDirsResponse.LogDirInfo>>> all() {
        return allDescriptions().thenApply(map -> map.entrySet().stream().collect(Collectors.toMap(
            entry -> entry.getKey(),
            entry -> convertMapValues(entry.getValue())
        )));
    }

    /**
     * Return a future which succeeds only if all the brokers have responded without error.
     * The result of the future is a map from brokerId to a map from broker log directory path
     * to a description of that log directory.
     */
    public KafkaFuture<Map<Integer, Map<String, LogDirDescription>>> allDescriptions() {
        return KafkaFuture.allOf(futures.values().toArray(new KafkaFuture[0])).
            thenApply(v -> {
                Map<Integer, Map<String, LogDirDescription>> descriptions = new HashMap<>(futures.size());
                for (Map.Entry<Integer, KafkaFuture<Map<String, LogDirDescription>>> entry : futures.entrySet()) {
                    try {
                        descriptions.put(entry.getKey(), entry.getValue().get());
                    } catch (InterruptedException | ExecutionException e) {
                        // This should be unreachable, because allOf ensured that all the futures completed successfully.
                        throw new RuntimeException(e);
                    }
                }
                return descriptions;
            });
    }
}

相关信息

kafka 源码目录

相关文章

kafka AbortTransactionOptions 源码

kafka AbortTransactionResult 源码

kafka AbortTransactionSpec 源码

kafka AbstractOptions 源码

kafka Admin 源码

kafka AdminClient 源码

kafka AdminClientConfig 源码

kafka AlterClientQuotasOptions 源码

kafka AlterClientQuotasResult 源码

kafka AlterConfigOp 源码