kafka BrokerRegistration 源码

kafka BrokerRegistration 代码

文件路径：/metadata/src/main/java/org/apache/kafka/metadata/BrokerRegistration.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.metadata;

import org.apache.kafka.common.Endpoint;
import org.apache.kafka.common.Node;
import org.apache.kafka.common.Uuid;
import org.apache.kafka.common.metadata.RegisterBrokerRecord;
import org.apache.kafka.common.metadata.RegisterBrokerRecord.BrokerEndpoint;
import org.apache.kafka.common.metadata.RegisterBrokerRecord.BrokerFeature;
import org.apache.kafka.common.security.auth.SecurityProtocol;
import org.apache.kafka.image.writer.ImageWriterOptions;
import org.apache.kafka.server.common.ApiMessageAndVersion;

import java.util.Collection;
import java.util.Collections;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Map.Entry;
import java.util.Objects;
import java.util.Optional;
import java.util.stream.Collectors;

/**
 * An immutable class which represents broker registrations.
 */
public class BrokerRegistration {
    private static Map<String, Endpoint> listenersToMap(Collection<Endpoint> listeners) {
        Map<String, Endpoint> listenersMap = new HashMap<>();
        for (Endpoint endpoint : listeners) {
            listenersMap.put(endpoint.listenerName().get(), endpoint);
        }
        return listenersMap;
    }

    private final int id;
    private final long epoch;
    private final Uuid incarnationId;
    private final Map<String, Endpoint> listeners;
    private final Map<String, VersionRange> supportedFeatures;
    private final Optional<String> rack;
    private final boolean fenced;
    private final boolean inControlledShutdown;

    public BrokerRegistration(int id,
                              long epoch,
                              Uuid incarnationId,
                              List<Endpoint> listeners,
                              Map<String, VersionRange> supportedFeatures,
                              Optional<String> rack,
                              boolean fenced,
                              boolean inControlledShutdown) {
        this(id, epoch, incarnationId, listenersToMap(listeners), supportedFeatures, rack,
            fenced, inControlledShutdown);
    }

    public BrokerRegistration(int id,
                              long epoch,
                              Uuid incarnationId,
                              Map<String, Endpoint> listeners,
                              Map<String, VersionRange> supportedFeatures,
                              Optional<String> rack,
                              boolean fenced,
                              boolean inControlledShutdown) {
        this.id = id;
        this.epoch = epoch;
        this.incarnationId = incarnationId;
        Map<String, Endpoint> newListeners = new HashMap<>(listeners.size());
        for (Entry<String, Endpoint> entry : listeners.entrySet()) {
            if (!entry.getValue().listenerName().isPresent()) {
                throw new IllegalArgumentException("Broker listeners must be named.");
            }
            newListeners.put(entry.getKey(), entry.getValue());
        }
        this.listeners = Collections.unmodifiableMap(newListeners);
        Objects.requireNonNull(supportedFeatures);
        this.supportedFeatures = new HashMap<>(supportedFeatures);
        Objects.requireNonNull(rack);
        this.rack = rack;
        this.fenced = fenced;
        this.inControlledShutdown = inControlledShutdown;
    }

    public static BrokerRegistration fromRecord(RegisterBrokerRecord record) {
        Map<String, Endpoint> listeners = new HashMap<>();
        for (BrokerEndpoint endpoint : record.endPoints()) {
            listeners.put(endpoint.name(), new Endpoint(endpoint.name(),
                SecurityProtocol.forId(endpoint.securityProtocol()),
                endpoint.host(),
                endpoint.port()));
        }
        Map<String, VersionRange> supportedFeatures = new HashMap<>();
        for (BrokerFeature feature : record.features()) {
            supportedFeatures.put(feature.name(), VersionRange.of(
                feature.minSupportedVersion(), feature.maxSupportedVersion()));
        }
        return new BrokerRegistration(record.brokerId(),
            record.brokerEpoch(),
            record.incarnationId(),
            listeners,
            supportedFeatures,
            Optional.ofNullable(record.rack()),
            record.fenced(),
            record.inControlledShutdown());
    }

    public int id() {
        return id;
    }

    public long epoch() {
        return epoch;
    }

    public Uuid incarnationId() {
        return incarnationId;
    }

    public Map<String, Endpoint> listeners() {
        return listeners;
    }

    public Optional<Node> node(String listenerName) {
        Endpoint endpoint = listeners().get(listenerName);
        if (endpoint == null) {
            return Optional.empty();
        }
        return Optional.of(new Node(id, endpoint.host(), endpoint.port(), rack.orElse(null)));
    }

    public Map<String, VersionRange> supportedFeatures() {
        return supportedFeatures;
    }

    public Optional<String> rack() {
        return rack;
    }

    public boolean fenced() {
        return fenced;
    }

    public boolean inControlledShutdown() {
        return inControlledShutdown;
    }

    public ApiMessageAndVersion toRecord(ImageWriterOptions options) {
        RegisterBrokerRecord registrationRecord = new RegisterBrokerRecord().
            setBrokerId(id).
            setRack(rack.orElse(null)).
            setBrokerEpoch(epoch).
            setIncarnationId(incarnationId).
            setFenced(fenced);

        if (inControlledShutdown) {
            if (options.metadataVersion().isInControlledShutdownStateSupported()) {
                registrationRecord.setInControlledShutdown(true);
            } else {
                options.handleLoss("the inControlledShutdown state of one or more brokers");
            }
        }

        for (Entry<String, Endpoint> entry : listeners.entrySet()) {
            Endpoint endpoint = entry.getValue();
            registrationRecord.endPoints().add(new BrokerEndpoint().
                setName(entry.getKey()).
                setHost(endpoint.host()).
                setPort(endpoint.port()).
                setSecurityProtocol(endpoint.securityProtocol().id));
        }

        for (Entry<String, VersionRange> entry : supportedFeatures.entrySet()) {
            registrationRecord.features().add(new BrokerFeature().
                setName(entry.getKey()).
                setMinSupportedVersion(entry.getValue().min()).
                setMaxSupportedVersion(entry.getValue().max()));
        }

        return new ApiMessageAndVersion(registrationRecord,
            options.metadataVersion().registerBrokerRecordVersion());
    }

    @Override
    public int hashCode() {
        return Objects.hash(id, epoch, incarnationId, listeners, supportedFeatures,
            rack, fenced, inControlledShutdown);
    }

    @Override
    public boolean equals(Object o) {
        if (!(o instanceof BrokerRegistration)) return false;
        BrokerRegistration other = (BrokerRegistration) o;
        return other.id == id &&
            other.epoch == epoch &&
            other.incarnationId.equals(incarnationId) &&
            other.listeners.equals(listeners) &&
            other.supportedFeatures.equals(supportedFeatures) &&
            other.rack.equals(rack) &&
            other.fenced == fenced &&
            other.inControlledShutdown == inControlledShutdown;
    }

    @Override
    public String toString() {
        StringBuilder bld = new StringBuilder();
        bld.append("BrokerRegistration(id=").append(id);
        bld.append(", epoch=").append(epoch);
        bld.append(", incarnationId=").append(incarnationId);
        bld.append(", listeners=[").append(
            listeners.keySet().stream().sorted().
                map(n -> listeners.get(n).toString()).
                collect(Collectors.joining(", ")));
        bld.append("], supportedFeatures={").append(
            supportedFeatures.keySet().stream().sorted().
                map(k -> k + ": " + supportedFeatures.get(k)).
                collect(Collectors.joining(", ")));
        bld.append("}");
        bld.append(", rack=").append(rack);
        bld.append(", fenced=").append(fenced);
        bld.append(", inControlledShutdown=").append(inControlledShutdown);
        bld.append(")");
        return bld.toString();
    }

    public BrokerRegistration cloneWith(
        Optional<Boolean> fencingChange,
        Optional<Boolean> inControlledShutdownChange
    ) {
        boolean newFenced = fencingChange.orElse(fenced);
        boolean newInControlledShutdownChange = inControlledShutdownChange.orElse(inControlledShutdown);

        if (newFenced == fenced && newInControlledShutdownChange == inControlledShutdown)
            return this;

        return new BrokerRegistration(
            id,
            epoch,
            incarnationId,
            listeners,
            supportedFeatures,
            rack,
            newFenced,
            newInControlledShutdownChange
        );
    }
}

相关信息

kafka 源码目录

相关文章

kafka BrokerHeartbeatReply 源码

kafka BrokerRegistrationFencingChange 源码

kafka BrokerRegistrationInControlledShutdownChange 源码

kafka BrokerRegistrationReply 源码

kafka BrokerState 源码

kafka ConfigSynonym 源码

kafka FinalizedControllerFeatures 源码

kafka KafkaConfigSchema 源码

kafka LeaderConstants 源码

kafka LeaderRecoveryState 源码