| /* |
| * 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.inmemory; |
| |
| import java.util.Collections; |
| import java.util.List; |
| import java.util.Map; |
| |
| import com.google.common.collect.ImmutableList; |
| import com.google.common.collect.ImmutableMap; |
| import com.google.common.collect.ImmutableSet; |
| import org.apache.samza.Partition; |
| import org.apache.samza.system.EndOfStreamMessage; |
| import org.apache.samza.system.IncomingMessageEnvelope; |
| import org.apache.samza.system.StreamSpec; |
| import org.apache.samza.system.SystemStreamMetadata; |
| import org.apache.samza.system.SystemStreamPartition; |
| import org.junit.Before; |
| import org.junit.Test; |
| |
| import static org.junit.Assert.assertEquals; |
| |
| |
| public class TestInMemoryManager { |
| private static final String SYSTEM = "system"; |
| private static final String STREAM0 = "stream0"; |
| private static final String STREAM1 = "stream1"; |
| |
| private InMemoryManager inMemoryManager; |
| |
| @Before |
| public void setup() { |
| this.inMemoryManager = new InMemoryManager(); |
| } |
| |
| @Test |
| public void testGetSystemStreamMetadata() { |
| this.inMemoryManager.initializeStream(new StreamSpec(STREAM0, STREAM0, SYSTEM, 1)); |
| this.inMemoryManager.initializeStream(new StreamSpec(STREAM1, STREAM1, SYSTEM, 1)); |
| // add some other stream which we won't request metadata for |
| this.inMemoryManager.initializeStream(new StreamSpec("otherStream", "otherStream", SYSTEM, 1)); |
| |
| // empty stream |
| SystemStreamMetadata systemStreamMetadata0 = new SystemStreamMetadata(STREAM0, |
| ImmutableMap.of(new Partition(0), new SystemStreamMetadata.SystemStreamPartitionMetadata(null, null, "0"))); |
| assertEquals(ImmutableMap.of(STREAM0, systemStreamMetadata0), |
| this.inMemoryManager.getSystemStreamMetadata(SYSTEM, ImmutableSet.of(STREAM0))); |
| |
| // add a message in |
| SystemStreamPartition ssp0 = new SystemStreamPartition(SYSTEM, STREAM0, new Partition(0)); |
| this.inMemoryManager.put(ssp0, "key00", "message00"); |
| systemStreamMetadata0 = new SystemStreamMetadata(STREAM0, |
| ImmutableMap.of(new Partition(0), new SystemStreamMetadata.SystemStreamPartitionMetadata("0", "0", "1"))); |
| assertEquals(ImmutableMap.of(STREAM0, systemStreamMetadata0), |
| this.inMemoryManager.getSystemStreamMetadata(SYSTEM, ImmutableSet.of(STREAM0))); |
| |
| // add a second message to the first stream and add one message to the second stream |
| this.inMemoryManager.put(ssp0, "key01", "message01"); |
| SystemStreamPartition ssp1 = new SystemStreamPartition(SYSTEM, STREAM1, new Partition(0)); |
| this.inMemoryManager.put(ssp1, "key10", "message10"); |
| systemStreamMetadata0 = new SystemStreamMetadata(STREAM0, |
| ImmutableMap.of(new Partition(0), new SystemStreamMetadata.SystemStreamPartitionMetadata("0", "1", "2"))); |
| SystemStreamMetadata systemStreamMetadata1 = new SystemStreamMetadata(STREAM1, |
| ImmutableMap.of(new Partition(0), new SystemStreamMetadata.SystemStreamPartitionMetadata("0", "0", "1"))); |
| |
| // also test a batch call for multiple streams here |
| assertEquals(ImmutableMap.of(STREAM0, systemStreamMetadata0, STREAM1, systemStreamMetadata1), |
| this.inMemoryManager.getSystemStreamMetadata(SYSTEM, ImmutableSet.of(STREAM0, STREAM1))); |
| |
| // test END_OF_STREAM doesn't alter new or upcoming offset |
| this.inMemoryManager.put(ssp0, "key02", new EndOfStreamMessage()); |
| systemStreamMetadata0 = new SystemStreamMetadata(STREAM0, |
| ImmutableMap.of(new Partition(0), new SystemStreamMetadata.SystemStreamPartitionMetadata("0", "1", "2"))); |
| assertEquals(ImmutableMap.of(STREAM0, systemStreamMetadata0), |
| this.inMemoryManager.getSystemStreamMetadata(SYSTEM, ImmutableSet.of(STREAM0))); |
| } |
| |
| @Test |
| public void testPoll() { |
| this.inMemoryManager.initializeStream(new StreamSpec(STREAM0, STREAM0, SYSTEM, 1)); |
| this.inMemoryManager.initializeStream(new StreamSpec(STREAM1, STREAM1, SYSTEM, 1)); |
| // add some other stream which we won't request metadata for |
| this.inMemoryManager.initializeStream(new StreamSpec("otherStream", "otherStream", SYSTEM, 1)); |
| |
| // empty stream |
| SystemStreamPartition ssp0 = new SystemStreamPartition(SYSTEM, STREAM0, new Partition(0)); |
| assertEquals(ImmutableMap.of(ssp0, ImmutableList.of()), |
| this.inMemoryManager.poll(Collections.singletonMap(ssp0, "0"))); |
| |
| // add a message in |
| this.inMemoryManager.put(ssp0, "key00", "message00"); |
| Map<SystemStreamPartition, List<IncomingMessageEnvelope>> polledMessages = |
| this.inMemoryManager.poll(Collections.singletonMap(ssp0, "0")); |
| assertEquals(1, polledMessages.get(ssp0).size()); |
| assertIncomingMessageEnvelope("key00", "message00", "0", ssp0, polledMessages.get(ssp0).get(0)); |
| |
| // add a second message to the first stream |
| this.inMemoryManager.put(ssp0, "key01", "message01"); |
| // verify multiple messages returned |
| polledMessages = this.inMemoryManager.poll(ImmutableMap.of(ssp0, "0")); |
| assertEquals(2, polledMessages.get(ssp0).size()); |
| assertIncomingMessageEnvelope("key00", "message00", "0", ssp0, polledMessages.get(ssp0).get(0)); |
| assertIncomingMessageEnvelope("key01", "message01", "1", ssp0, polledMessages.get(ssp0).get(1)); |
| // make sure only read messages starting from the offset that is not the oldest offset |
| polledMessages = this.inMemoryManager.poll(ImmutableMap.of(ssp0, "1")); |
| assertEquals(1, polledMessages.get(ssp0).size()); |
| assertIncomingMessageEnvelope("key01", "message01", "1", ssp0, polledMessages.get(ssp0).get(0)); |
| |
| // add a message to the second stream to test a batch call |
| SystemStreamPartition ssp1 = new SystemStreamPartition(SYSTEM, STREAM1, new Partition(0)); |
| this.inMemoryManager.put(ssp1, "key10", "message10"); |
| polledMessages = this.inMemoryManager.poll(ImmutableMap.of(ssp0, "1", ssp1, "0")); |
| assertEquals(1, polledMessages.get(ssp0).size()); |
| assertIncomingMessageEnvelope("key01", "message01", "1", ssp0, polledMessages.get(ssp0).get(0)); |
| assertEquals(1, polledMessages.get(ssp1).size()); |
| assertIncomingMessageEnvelope("key10", "message10", "0", ssp1, polledMessages.get(ssp1).get(0)); |
| } |
| |
| private static void assertIncomingMessageEnvelope(String expectedKey, String expectedMessage, String expectedOffset, |
| SystemStreamPartition expectedSystemStreamPartition, IncomingMessageEnvelope actualIncomingMessageEnvelope) { |
| assertEquals(expectedKey, actualIncomingMessageEnvelope.getKey()); |
| assertEquals(expectedMessage, actualIncomingMessageEnvelope.getMessage()); |
| assertEquals(expectedOffset, actualIncomingMessageEnvelope.getOffset()); |
| assertEquals(expectedSystemStreamPartition, actualIncomingMessageEnvelope.getSystemStreamPartition()); |
| } |
| } |