| /* |
| * 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.PlaintextAuthenticationContext; |
| import org.apache.kafka.common.utils.Utils; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| import java.io.Closeable; |
| import java.net.InetAddress; |
| import java.nio.channels.SelectionKey; |
| import java.util.Map; |
| 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) throws KafkaException { |
| try { |
| PlaintextTransportLayer transportLayer = new PlaintextTransportLayer(key); |
| Supplier<Authenticator> authenticatorCreator = () -> new PlaintextAuthenticator(configs, transportLayer, listenerName); |
| return new KafkaChannel(id, transportLayer, authenticatorCreator, maxReceiveSize, |
| memoryPool != null ? memoryPool : MemoryPool.NONE); |
| } catch (Exception e) { |
| log.warn("Failed to create channel due to ", e); |
| throw new KafkaException(e); |
| } |
| } |
| |
| @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, transportLayer, this, 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 boolean complete() { |
| return true; |
| } |
| |
| @Override |
| public void close() { |
| if (principalBuilder instanceof Closeable) |
| Utils.closeQuietly((Closeable) principalBuilder, "principal builder"); |
| } |
| } |
| |
| } |