| /** |
| * 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.test; |
| |
| import org.apache.kafka.clients.producer.ProducerRecord; |
| import org.apache.kafka.common.serialization.Serde; |
| import org.apache.kafka.common.serialization.Serdes; |
| import org.apache.kafka.common.serialization.Serializer; |
| import org.apache.kafka.streams.kstream.KStreamBuilder; |
| import org.apache.kafka.streams.processor.ProcessorContext; |
| import org.apache.kafka.streams.processor.StateStore; |
| import org.apache.kafka.streams.processor.StateStoreSupplier; |
| import org.apache.kafka.streams.processor.StreamPartitioner; |
| import org.apache.kafka.streams.processor.internals.ProcessorNode; |
| import org.apache.kafka.streams.processor.internals.ProcessorTopology; |
| import org.apache.kafka.streams.processor.internals.RecordCollector; |
| |
| import java.io.File; |
| import java.util.List; |
| import java.util.Map; |
| |
| public class KStreamTestDriver { |
| |
| private final ProcessorTopology topology; |
| private final MockProcessorContext context; |
| public final File stateDir; |
| |
| private ProcessorNode currNode; |
| |
| public KStreamTestDriver(KStreamBuilder builder) { |
| this(builder, null, Serdes.ByteArray(), Serdes.ByteArray()); |
| } |
| |
| public KStreamTestDriver(KStreamBuilder builder, File stateDir) { |
| this(builder, stateDir, Serdes.ByteArray(), Serdes.ByteArray()); |
| } |
| |
| public KStreamTestDriver(KStreamBuilder builder, |
| File stateDir, |
| Serde<?> keySerde, |
| Serde<?> valSerde) { |
| this.topology = builder.build("X", null); |
| this.stateDir = stateDir; |
| this.context = new MockProcessorContext(this, stateDir, keySerde, valSerde, new MockRecordCollector()); |
| this.context.setTime(0L); |
| |
| for (StateStoreSupplier stateStoreSupplier : topology.stateStoreSuppliers()) { |
| StateStore store = stateStoreSupplier.get(); |
| store.init(context, store); |
| } |
| |
| for (ProcessorNode node : topology.processors()) { |
| currNode = node; |
| try { |
| node.init(context); |
| } finally { |
| currNode = null; |
| } |
| } |
| } |
| |
| public ProcessorContext context() { |
| return context; |
| } |
| |
| public void process(String topicName, Object key, Object value) { |
| currNode = topology.source(topicName); |
| try { |
| forward(key, value); |
| } finally { |
| currNode = null; |
| } |
| } |
| |
| public void punctuate(long timestamp) { |
| setTime(timestamp); |
| |
| for (ProcessorNode processor : topology.processors()) { |
| if (processor.processor() != null) { |
| currNode = processor; |
| try { |
| processor.processor().punctuate(timestamp); |
| } finally { |
| currNode = null; |
| } |
| } |
| } |
| } |
| |
| public void setTime(long timestamp) { |
| context.setTime(timestamp); |
| } |
| |
| public StateStore getStateStore(String name) { |
| return context.getStateStore(name); |
| } |
| |
| @SuppressWarnings("unchecked") |
| public <K, V> void forward(K key, V value) { |
| ProcessorNode thisNode = currNode; |
| for (ProcessorNode childNode : (List<ProcessorNode<K, V>>) thisNode.children()) { |
| currNode = childNode; |
| try { |
| childNode.process(key, value); |
| } finally { |
| currNode = thisNode; |
| } |
| } |
| } |
| |
| @SuppressWarnings("unchecked") |
| public <K, V> void forward(K key, V value, int childIndex) { |
| ProcessorNode thisNode = currNode; |
| ProcessorNode childNode = (ProcessorNode<K, V>) thisNode.children().get(childIndex); |
| currNode = childNode; |
| try { |
| childNode.process(key, value); |
| } finally { |
| currNode = thisNode; |
| } |
| } |
| |
| @SuppressWarnings("unchecked") |
| public <K, V> void forward(K key, V value, String childName) { |
| ProcessorNode thisNode = currNode; |
| for (ProcessorNode childNode : (List<ProcessorNode<K, V>>) thisNode.children()) { |
| if (childNode.name().equals(childName)) { |
| currNode = childNode; |
| try { |
| childNode.process(key, value); |
| } finally { |
| currNode = thisNode; |
| } |
| break; |
| } |
| } |
| } |
| |
| public Map<String, StateStore> allStateStores() { |
| return context.allStateStores(); |
| } |
| |
| |
| private class MockRecordCollector extends RecordCollector { |
| public MockRecordCollector() { |
| super(null); |
| } |
| |
| @Override |
| public <K, V> void send(ProducerRecord<K, V> record, Serializer<K> keySerializer, Serializer<V> valueSerializer, |
| StreamPartitioner<K, V> partitioner) { |
| // The serialization is skipped. |
| process(record.topic(), record.key(), record.value()); |
| } |
| |
| @Override |
| public <K, V> void send(ProducerRecord<K, V> record, Serializer<K> keySerializer, Serializer<V> valueSerializer) { |
| // The serialization is skipped. |
| process(record.topic(), record.key(), record.value()); |
| } |
| |
| @Override |
| public void flush() { |
| } |
| |
| @Override |
| public void close() { |
| } |
| } |
| |
| } |