| /* |
| * 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.samza.system; |
| |
| import java.util.ArrayList; |
| import java.util.HashMap; |
| import java.util.HashSet; |
| import java.util.List; |
| import java.util.Map; |
| import java.util.Random; |
| import java.util.Set; |
| import java.util.concurrent.ConcurrentHashMap; |
| import org.apache.samza.Partition; |
| import org.apache.samza.config.Config; |
| import org.apache.samza.metrics.MetricsRegistry; |
| |
| |
| /** |
| * A mock system backed by a set of in-memory queues. Used for testing w/o actual external messaging systems. |
| */ |
| public class MockSystemFactory implements SystemFactory { |
| |
| public static final Map<SystemStreamPartition, List<IncomingMessageEnvelope>> MSG_QUEUES = new ConcurrentHashMap<>(); |
| |
| public SystemConsumer getConsumer(String systemName, Config config, MetricsRegistry registry) { |
| return new SystemConsumer() { |
| public void start() { |
| } |
| |
| public void stop() { |
| } |
| |
| public void register(SystemStreamPartition systemStreamPartition, String offset) { |
| MSG_QUEUES.putIfAbsent(systemStreamPartition, new ArrayList<>()); |
| } |
| |
| public Map<SystemStreamPartition, List<IncomingMessageEnvelope>> poll(Set<SystemStreamPartition> systemStreamPartitions, long timeout) { |
| Map<SystemStreamPartition, List<IncomingMessageEnvelope>> retQueues = new HashMap<>(); |
| systemStreamPartitions.forEach(ssp -> { |
| List<IncomingMessageEnvelope> msgs = MSG_QUEUES.get(ssp); |
| if (msgs == null) { |
| retQueues.put(ssp, new ArrayList<>()); |
| } else { |
| retQueues.put(ssp, MSG_QUEUES.remove(ssp)); |
| } |
| }); |
| return retQueues; |
| } |
| }; |
| } |
| |
| public SystemProducer getProducer(String systemName, Config config, MetricsRegistry registry) { |
| return new SystemProducer() { |
| private final Random seed = new Random(System.currentTimeMillis()); |
| |
| @Override |
| public void start() { |
| |
| } |
| |
| @Override |
| public void stop() { |
| |
| } |
| |
| @Override |
| public void register(String source) { |
| } |
| |
| @Override |
| public void send(String source, OutgoingMessageEnvelope envelope) { |
| SystemStream systemStream = envelope.getSystemStream(); |
| List<SystemStreamPartition> sspForSystem = MSG_QUEUES.keySet().stream() |
| .filter(ssp -> ssp.getSystemStream().equals(systemStream)) |
| .collect(ArrayList::new, (l, ssp) -> l.add(ssp), (l1, l2) -> l1.addAll(l2)); |
| if (sspForSystem.isEmpty()) { |
| MSG_QUEUES.putIfAbsent(new SystemStreamPartition(systemStream, new Partition(0)), new ArrayList<>()); |
| sspForSystem.add(new SystemStreamPartition(systemStream, new Partition(0))); |
| } |
| int partitionCount = sspForSystem.size(); |
| int partitionId = envelope.getPartitionKey() == null ? |
| envelope.getKey() == null ? this.seed.nextInt(partitionCount) : envelope.getKey().hashCode() % partitionCount : |
| envelope.getPartitionKey().hashCode() % partitionCount; |
| SystemStreamPartition ssp = new SystemStreamPartition(envelope.getSystemStream(), new Partition(partitionId)); |
| List<IncomingMessageEnvelope> msgQueue = MSG_QUEUES.get(ssp); |
| msgQueue.add(new IncomingMessageEnvelope(ssp, null, envelope.getKey(), envelope.getMessage())); |
| } |
| |
| @Override |
| public void flush(String source) { |
| |
| } |
| }; |
| } |
| |
| public SystemAdmin getAdmin(String systemName, Config config) { |
| return new SystemAdmin() { |
| |
| @Override |
| public Map<SystemStreamPartition, String> getOffsetsAfter(Map<SystemStreamPartition, String> offsets) { |
| return null; |
| } |
| |
| @Override |
| public Map<String, SystemStreamMetadata> getSystemStreamMetadata(Set<String> streamNames) { |
| Map<String, SystemStreamMetadata> metadataMap = new HashMap<>(); |
| Map<String, Set<Partition>> partitionMap = MSG_QUEUES.entrySet() |
| .stream() |
| .filter(entry -> streamNames.contains(entry.getKey().getSystemStream().getStream())) |
| .map(e -> e.getKey()) |
| .<Map<String, Set<Partition>>>collect(HashMap::new, |
| (m, ssp) -> { |
| if (m.get(ssp.getStream()) == null) { |
| m.put(ssp.getStream(), new HashSet<>()); |
| } |
| m.get(ssp.getStream()).add(ssp.getPartition()); |
| }, (m1, m2) -> { |
| m2.forEach((k, v) -> { |
| if (m1.get(k) == null) { |
| m1.put(k, v); |
| } else { |
| m1.get(k).addAll(v); |
| } |
| }); |
| }); |
| |
| partitionMap.forEach((k, v) -> { |
| Map<Partition, SystemStreamMetadata.SystemStreamPartitionMetadata> partitionMetaMap = |
| v.stream().<Map<Partition, SystemStreamMetadata.SystemStreamPartitionMetadata>>collect(HashMap::new, |
| (m, p) -> { |
| m.put(p, new SystemStreamMetadata.SystemStreamPartitionMetadata("0", "0", "1")); |
| }, (m1, m2) -> m1.putAll(m2)); |
| |
| metadataMap.put(k, new SystemStreamMetadata(k, partitionMetaMap)); |
| }); |
| |
| return metadataMap; |
| } |
| |
| @Override |
| public Integer offsetComparator(String offset1, String offset2) { |
| return offset1.compareTo(offset2); |
| } |
| |
| @Override |
| public Map<String, SystemStreamMetadata> getSystemStreamPartitionCounts(Set<String> streamNames, long cacheTTL) { |
| return getSystemStreamMetadata(streamNames); |
| } |
| |
| @Override |
| public boolean createStream(StreamSpec streamSpec) { |
| return true; |
| } |
| |
| @Override |
| public void validateStream(StreamSpec streamSpec) throws StreamValidationException { |
| |
| } |
| }; |
| } |
| } |