| /** |
| * 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.streams.processor.internals; |
| |
| import org.apache.kafka.common.serialization.Deserializer; |
| import org.apache.kafka.streams.processor.ProcessorContext; |
| |
| public class SourceNode<K, V> extends ProcessorNode<K, V> { |
| |
| private Deserializer<K> keyDeserializer; |
| private Deserializer<V> valDeserializer; |
| private ProcessorContext context; |
| |
| public SourceNode(String name, Deserializer<K> keyDeserializer, Deserializer<V> valDeserializer) { |
| super(name); |
| |
| this.keyDeserializer = keyDeserializer; |
| this.valDeserializer = valDeserializer; |
| } |
| |
| public K deserializeKey(String topic, byte[] data) { |
| return keyDeserializer.deserialize(topic, data); |
| } |
| |
| public V deserializeValue(String topic, byte[] data) { |
| return valDeserializer.deserialize(topic, data); |
| } |
| |
| @SuppressWarnings("unchecked") |
| @Override |
| public void init(ProcessorContext context) { |
| this.context = context; |
| |
| // if serializers are null, get the default ones from the context |
| if (this.keyDeserializer == null) this.keyDeserializer = (Deserializer<K>) context.keySerde().deserializer(); |
| if (this.valDeserializer == null) this.valDeserializer = (Deserializer<V>) context.valueSerde().deserializer(); |
| } |
| |
| @Override |
| public void process(K key, V value) { |
| context.forward(key, value); |
| } |
| |
| @Override |
| public void close() { |
| // do nothing |
| } |
| |
| } |