szehon-ho commented on code in PR #17236:
URL: https://github.com/apache/iceberg/pull/17236#discussion_r3874078977
##########
azure/src/test/java/org/apache/iceberg/azure/adlsv2/TestADLSInputStream.java:
##########
@@ -123,4 +129,106 @@ void testReadTailClosesTheStream() throws IOException {
verify(inputStream).close();
}
+
+ @Test
+ void testReadFullyTracksMetrics() throws IOException {
+ byte[] data = new byte[] {1, 2, 3, 4, 5, 6, 7, 8};
+ InputStream byteStream = new ByteArrayInputStream(data);
+ InternalDataLakeFileOpenInputStreamResult openInputStreamResult =
+ new InternalDataLakeFileOpenInputStreamResult(byteStream, mock());
+ when(fileClient.openInputStream(any())).thenReturn(openInputStreamResult);
+
+ CachingMetricsContext metrics = new CachingMetricsContext();
+ Counter readBytes = metrics.counter(FileIOMetricsContext.READ_BYTES,
MetricsContext.Unit.BYTES);
+ Counter readOperations =
metrics.counter(FileIOMetricsContext.READ_OPERATIONS);
+
+ try (ADLSInputStream in =
+ new ADLSInputStream(
+ "abfs://[email protected]/path/to/file",
+ fileClient,
+ (long) data.length,
+ mock(),
+ metrics)) {
+ in.readFully(0, new byte[data.length], 0, data.length);
+
+ assertThat(readBytes.value()).isEqualTo(data.length);
+ assertThat(readOperations.value()).isEqualTo(1);
+ }
+ }
+
+ @Test
+ void testReadTailTracksMetrics() throws IOException {
+ byte[] data = new byte[] {1, 2, 3, 4, 5, 6, 7, 8};
+ InputStream byteStream = new ByteArrayInputStream(data);
+ // the constructor's openStream() reads the file size from the stream
result, so report the
+ // real length; otherwise readTail computes a negative start offset
+ PathProperties properties = mock(PathProperties.class);
+ when(properties.getFileSize()).thenReturn((long) data.length);
+ InternalDataLakeFileOpenInputStreamResult openInputStreamResult =
+ new InternalDataLakeFileOpenInputStreamResult(byteStream, properties);
+ when(fileClient.openInputStream(any())).thenReturn(openInputStreamResult);
+
+ CachingMetricsContext metrics = new CachingMetricsContext();
+ Counter readBytes = metrics.counter(FileIOMetricsContext.READ_BYTES,
MetricsContext.Unit.BYTES);
+ Counter readOperations =
metrics.counter(FileIOMetricsContext.READ_OPERATIONS);
+
+ try (ADLSInputStream in =
+ new ADLSInputStream(
+ "abfs://[email protected]/path/to/file",
+ fileClient,
+ (long) data.length,
+ mock(),
+ metrics)) {
+ int tailLength = 4;
+ int bytesRead = in.readTail(new byte[tailLength], 0, tailLength);
+
+ assertThat(bytesRead).isEqualTo(tailLength);
+ assertThat(readBytes.value()).isEqualTo(tailLength);
+ assertThat(readOperations.value()).isEqualTo(1);
+ }
+ }
+
+ @Test
+ void testReadTailEmptyObjectDoesNotCountMetrics() throws IOException {
+ InputStream byteStream = new ByteArrayInputStream(new byte[0]);
+ PathProperties properties = mock(PathProperties.class);
+ when(properties.getFileSize()).thenReturn(0L);
+ InternalDataLakeFileOpenInputStreamResult openInputStreamResult =
+ new InternalDataLakeFileOpenInputStreamResult(byteStream, properties);
+ when(fileClient.openInputStream(any())).thenReturn(openInputStreamResult);
+
+ CachingMetricsContext metrics = new CachingMetricsContext();
+ Counter readBytes = metrics.counter(FileIOMetricsContext.READ_BYTES,
MetricsContext.Unit.BYTES);
+ Counter readOperations =
metrics.counter(FileIOMetricsContext.READ_OPERATIONS);
+
+ try (ADLSInputStream in =
+ new ADLSInputStream(
+ "abfs://[email protected]/path/to/file",
+ fileClient,
+ 0L,
+ mock(),
+ metrics)) {
+ int bytesRead = in.readTail(new byte[8], 0, 8);
Review Comment:
Clamp the tail start in `ADLSInputStream` with `Math.max(0, fileSize -
length)`. This test currently fails before reaching these assertions because an
empty file produces offset `-8`, which Azure rejects; `core-tests` is red on
this method.
##########
aws/src/test/java/org/apache/iceberg/aws/s3/TestAnalyticsAcceleratorInputStreamWrapper.java:
##########
@@ -0,0 +1,89 @@
+/*
+ * 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.iceberg.aws.s3;
+
+import static org.assertj.core.api.Assertions.assertThat;
+import static org.mockito.ArgumentMatchers.any;
+import static org.mockito.ArgumentMatchers.anyInt;
+import static org.mockito.Mockito.mock;
+import static org.mockito.Mockito.when;
+
+import java.io.IOException;
+import java.util.Map;
+import org.apache.iceberg.io.FileIOMetricsContext;
+import org.apache.iceberg.metrics.Counter;
+import org.apache.iceberg.metrics.DefaultMetricsContext;
+import org.apache.iceberg.metrics.MetricsContext;
+import org.apache.iceberg.relocated.com.google.common.collect.Maps;
+import org.junit.jupiter.api.Test;
+import software.amazon.s3.analyticsaccelerator.S3SeekableInputStream;
+
+public class TestAnalyticsAcceleratorInputStreamWrapper {
+
+ @Test
+ public void testReadTracksMetrics() throws IOException {
+ S3SeekableInputStream delegate = mock(S3SeekableInputStream.class);
+ // first a single-byte read, then a buffered read of 8 bytes, then a
zero-length read, then EOF
+ when(delegate.read()).thenReturn(1);
+ when(delegate.read(any(byte[].class), anyInt(), anyInt()))
+ .thenReturn(8)
+ .thenReturn(0)
+ .thenReturn(-1);
+
+ CachingMetricsContext metrics = new CachingMetricsContext();
+ Counter readBytes = metrics.counter(FileIOMetricsContext.READ_BYTES,
MetricsContext.Unit.BYTES);
+ Counter readOperations =
metrics.counter(FileIOMetricsContext.READ_OPERATIONS);
+
+ try (AnalyticsAcceleratorInputStreamWrapper in =
+ new AnalyticsAcceleratorInputStreamWrapper(delegate, metrics)) {
+ assertThat(in.read()).isEqualTo(1);
+ assertThat(readBytes.value()).isEqualTo(1);
+ assertThat(readOperations.value()).isEqualTo(1);
+
+ assertThat(in.read(new byte[16], 0, 16)).isEqualTo(8);
+ assertThat(readBytes.value()).isEqualTo(9);
+ assertThat(readOperations.value()).isEqualTo(2);
+
+ // a zero-length read counts neither bytes nor an operation
+ assertThat(in.read(new byte[16], 0, 0)).isEqualTo(0);
+ assertThat(readBytes.value()).isEqualTo(9);
+ assertThat(readOperations.value()).isEqualTo(2);
+
+ // an EOF read counts neither bytes nor an operation
+ assertThat(in.read(new byte[16], 0, 16)).isEqualTo(-1);
+ assertThat(readBytes.value()).isEqualTo(9);
+ assertThat(readOperations.value()).isEqualTo(2);
+ }
+ }
+
+ /**
+ * A {@link MetricsContext} that returns the same {@link Counter} instance
for a given name, so
+ * that tests can observe the counters the stream under test increments.
{@link
+ * DefaultMetricsContext} allocates a fresh counter on every {@code
counter(...)} call.
+ */
+ private static class CachingMetricsContext extends DefaultMetricsContext {
+ private final Map<String, org.apache.iceberg.metrics.Counter> counters =
+ Maps.newConcurrentMap();
Review Comment:
Please use JDK `ConcurrentHashMap` here and in the other new
`CachingMetricsContext` helpers. These tests do not need Guava, and project
convention is to avoid expanding Guava usage when a JDK equivalent exists.
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