kafka PlaintextChannelBuilder 源码

  • 2022-10-20
  • 浏览 (435)

kafka PlaintextChannelBuilder 代码

文件路径:/clients/src/main/java/org/apache/kafka/common/network/PlaintextChannelBuilder.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.network;

import org.apache.kafka.common.KafkaException;
import org.apache.kafka.common.memory.MemoryPool;
import org.apache.kafka.common.security.auth.KafkaPrincipal;
import org.apache.kafka.common.security.auth.KafkaPrincipalBuilder;
import org.apache.kafka.common.security.auth.KafkaPrincipalSerde;
import org.apache.kafka.common.security.auth.PlaintextAuthenticationContext;
import org.apache.kafka.common.utils.Utils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.io.Closeable;
import java.io.IOException;
import java.net.InetAddress;
import java.nio.channels.SelectionKey;
import java.util.Map;
import java.util.Optional;
import java.util.function.Supplier;

public class PlaintextChannelBuilder implements ChannelBuilder {
    private static final Logger log = LoggerFactory.getLogger(PlaintextChannelBuilder.class);
    private final ListenerName listenerName;
    private Map<String, ?> configs;

    /**
     * Constructs a plaintext channel builder. ListenerName is non-null whenever
     * it's instantiated in the broker and null otherwise.
     */
    public PlaintextChannelBuilder(ListenerName listenerName) {
        this.listenerName = listenerName;
    }

    public void configure(Map<String, ?> configs) throws KafkaException {
        this.configs = configs;
    }

    @Override
    public KafkaChannel buildChannel(String id, SelectionKey key, int maxReceiveSize,
                                     MemoryPool memoryPool, ChannelMetadataRegistry metadataRegistry) throws KafkaException {
        try {
            PlaintextTransportLayer transportLayer = buildTransportLayer(key);
            Supplier<Authenticator> authenticatorCreator = () -> new PlaintextAuthenticator(configs, transportLayer, listenerName);
            return buildChannel(id, transportLayer, authenticatorCreator, maxReceiveSize,
                    memoryPool != null ? memoryPool : MemoryPool.NONE, metadataRegistry);
        } catch (Exception e) {
            throw new KafkaException(e);
        }
    }

    // visible for testing
    KafkaChannel buildChannel(String id, TransportLayer transportLayer, Supplier<Authenticator> authenticatorCreator,
                              int maxReceiveSize, MemoryPool memoryPool, ChannelMetadataRegistry metadataRegistry) {
        return new KafkaChannel(id, transportLayer, authenticatorCreator, maxReceiveSize, memoryPool, metadataRegistry);
    }

    protected PlaintextTransportLayer buildTransportLayer(SelectionKey key) throws IOException {
        return new PlaintextTransportLayer(key);
    }

    @Override
    public void close() {}

    private static class PlaintextAuthenticator implements Authenticator {
        private final PlaintextTransportLayer transportLayer;
        private final KafkaPrincipalBuilder principalBuilder;
        private final ListenerName listenerName;

        private PlaintextAuthenticator(Map<String, ?> configs, PlaintextTransportLayer transportLayer, ListenerName listenerName) {
            this.transportLayer = transportLayer;
            this.principalBuilder = ChannelBuilders.createPrincipalBuilder(configs, null, null);
            this.listenerName = listenerName;
        }

        @Override
        public void authenticate() {}

        @Override
        public KafkaPrincipal principal() {
            InetAddress clientAddress = transportLayer.socketChannel().socket().getInetAddress();
            // listenerName should only be null in Client mode where principal() should not be called
            if (listenerName == null)
                throw new IllegalStateException("Unexpected call to principal() when listenerName is null");
            return principalBuilder.build(new PlaintextAuthenticationContext(clientAddress, listenerName.value()));
        }

        @Override
        public Optional<KafkaPrincipalSerde> principalSerde() {
            return principalBuilder instanceof KafkaPrincipalSerde ? Optional.of((KafkaPrincipalSerde) principalBuilder) : Optional.empty();
        }

        @Override
        public boolean complete() {
            return true;
        }

        @Override
        public void close() {
            if (principalBuilder instanceof Closeable)
                Utils.closeQuietly((Closeable) principalBuilder, "principal builder");
        }
    }

}

相关信息

kafka 源码目录

相关文章

kafka Authenticator 源码

kafka ByteBufferSend 源码

kafka ChannelBuilder 源码

kafka ChannelBuilders 源码

kafka ChannelMetadataRegistry 源码

kafka ChannelState 源码

kafka CipherInformation 源码

kafka ClientInformation 源码

kafka DefaultChannelMetadataRegistry 源码

kafka DelayedResponseAuthenticationException 源码

0  赞