| /* |
| * 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.beam.sdk.io.kinesis; |
| |
| import static java.util.Arrays.asList; |
| import static org.assertj.core.api.Assertions.assertThat; |
| import static org.mockito.Matchers.any; |
| import static org.mockito.Matchers.eq; |
| import static org.mockito.Mockito.doReturn; |
| import static org.mockito.Mockito.spy; |
| import static org.mockito.Mockito.when; |
| |
| import java.io.IOException; |
| import java.util.NoSuchElementException; |
| import org.joda.time.Duration; |
| import org.joda.time.Instant; |
| import org.junit.Before; |
| import org.junit.Test; |
| import org.junit.runner.RunWith; |
| import org.mockito.Mock; |
| import org.mockito.runners.MockitoJUnitRunner; |
| |
| /** Tests {@link KinesisReader}. */ |
| @RunWith(MockitoJUnitRunner.class) |
| public class KinesisReaderTest { |
| |
| @Mock private SimplifiedKinesisClient kinesis; |
| @Mock private CheckpointGenerator generator; |
| @Mock private ShardCheckpoint firstCheckpoint, secondCheckpoint; |
| @Mock private KinesisRecord a, b, c, d; |
| @Mock private KinesisSource kinesisSource; |
| @Mock private ShardReadersPool shardReadersPool; |
| |
| private KinesisReader reader; |
| |
| @Before |
| public void setUp() throws TransientKinesisException { |
| when(generator.generate(kinesis)) |
| .thenReturn(new KinesisReaderCheckpoint(asList(firstCheckpoint, secondCheckpoint))); |
| when(shardReadersPool.nextRecord()).thenReturn(CustomOptional.absent()); |
| when(a.getApproximateArrivalTimestamp()).thenReturn(Instant.now()); |
| when(b.getApproximateArrivalTimestamp()).thenReturn(Instant.now()); |
| when(c.getApproximateArrivalTimestamp()).thenReturn(Instant.now()); |
| when(d.getApproximateArrivalTimestamp()).thenReturn(Instant.now()); |
| |
| reader = spy(createReader(Duration.ZERO)); |
| } |
| |
| private KinesisReader createReader(Duration backlogBytesCheckThreshold) { |
| return new KinesisReader( |
| kinesis, |
| generator, |
| kinesisSource, |
| WatermarkPolicyFactory.withArrivalTimePolicy(), |
| Duration.ZERO, |
| backlogBytesCheckThreshold) { |
| @Override |
| ShardReadersPool createShardReadersPool() { |
| return shardReadersPool; |
| } |
| }; |
| } |
| |
| @Test |
| public void startReturnsFalseIfNoDataAtTheBeginning() throws IOException { |
| assertThat(reader.start()).isFalse(); |
| } |
| |
| @Test(expected = NoSuchElementException.class) |
| public void throwsNoSuchElementExceptionIfNoData() throws IOException { |
| reader.start(); |
| reader.getCurrent(); |
| } |
| |
| @Test |
| public void startReturnsTrueIfSomeDataAvailable() throws IOException { |
| when(shardReadersPool.nextRecord()) |
| .thenReturn(CustomOptional.of(a)) |
| .thenReturn(CustomOptional.absent()); |
| |
| assertThat(reader.start()).isTrue(); |
| } |
| |
| @Test |
| public void readsThroughAllDataAvailable() throws IOException { |
| when(shardReadersPool.nextRecord()) |
| .thenReturn(CustomOptional.of(c)) |
| .thenReturn(CustomOptional.absent()) |
| .thenReturn(CustomOptional.of(a)) |
| .thenReturn(CustomOptional.absent()) |
| .thenReturn(CustomOptional.of(d)) |
| .thenReturn(CustomOptional.of(b)) |
| .thenReturn(CustomOptional.absent()); |
| |
| assertThat(reader.start()).isTrue(); |
| assertThat(reader.getCurrent()).isEqualTo(c); |
| assertThat(reader.advance()).isFalse(); |
| assertThat(reader.advance()).isTrue(); |
| assertThat(reader.getCurrent()).isEqualTo(a); |
| assertThat(reader.advance()).isFalse(); |
| assertThat(reader.advance()).isTrue(); |
| assertThat(reader.getCurrent()).isEqualTo(d); |
| assertThat(reader.advance()).isTrue(); |
| assertThat(reader.getCurrent()).isEqualTo(b); |
| assertThat(reader.advance()).isFalse(); |
| } |
| |
| @Test |
| public void returnsCurrentWatermark() throws IOException { |
| Instant expectedWatermark = new Instant(123456L); |
| when(shardReadersPool.getWatermark()).thenReturn(expectedWatermark); |
| |
| reader.start(); |
| Instant currentWatermark = reader.getWatermark(); |
| |
| assertThat(currentWatermark).isEqualTo(expectedWatermark); |
| } |
| |
| @Test |
| public void getTotalBacklogBytesShouldReturnLastSeenValueWhenKinesisExceptionsOccur() |
| throws TransientKinesisException, IOException { |
| reader.start(); |
| when(kinesisSource.getStreamName()).thenReturn("stream1"); |
| doReturn(Instant.now().minus(Duration.standardMinutes(1))).when(reader).getWatermark(); |
| when(kinesis.getBacklogBytes(eq("stream1"), any(Instant.class))) |
| .thenReturn(10L) |
| .thenThrow(TransientKinesisException.class) |
| .thenReturn(20L); |
| |
| assertThat(reader.getTotalBacklogBytes()).isEqualTo(10); |
| assertThat(reader.getTotalBacklogBytes()).isEqualTo(10); |
| assertThat(reader.getTotalBacklogBytes()).isEqualTo(20); |
| } |
| |
| @Test |
| public void getTotalBacklogBytesShouldReturnLastSeenValueWhenCalledFrequently() |
| throws TransientKinesisException, IOException { |
| KinesisReader backlogCachingReader = spy(createReader(Duration.standardSeconds(30))); |
| backlogCachingReader.start(); |
| doReturn(Instant.now().minus(Duration.standardMinutes(1))) |
| .when(backlogCachingReader) |
| .getWatermark(); |
| when(kinesisSource.getStreamName()).thenReturn("stream1"); |
| when(kinesis.getBacklogBytes(eq("stream1"), any(Instant.class))) |
| .thenReturn(10L) |
| .thenReturn(20L); |
| |
| assertThat(backlogCachingReader.getTotalBacklogBytes()).isEqualTo(10); |
| assertThat(backlogCachingReader.getTotalBacklogBytes()).isEqualTo(10); |
| } |
| } |