anmolanmol1234 commented on code in PR #8611: URL: https://github.com/apache/hadoop/pull/8611#discussion_r3842901696
########## hadoop-tools/hadoop-azure/src/test/java/org/apache/hadoop/fs/azurebfs/services/TestAbfsBlobClientPhotonHeaders.java: ########## @@ -0,0 +1,214 @@ +/** + * 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.hadoop.fs.azurebfs.services; + +import java.io.ByteArrayInputStream; +import java.io.ByteArrayOutputStream; +import java.io.IOException; +import java.net.URL; +import java.nio.charset.StandardCharsets; +import java.util.ArrayList; +import java.util.Collections; +import java.util.List; + +import org.apache.arrow.memory.BufferAllocator; +import org.apache.arrow.memory.RootAllocator; +import org.apache.arrow.vector.VarCharVector; +import org.apache.arrow.vector.VectorSchemaRoot; +import org.apache.arrow.vector.ipc.ArrowStreamWriter; +import org.apache.arrow.vector.types.pojo.ArrowType; +import org.apache.arrow.vector.types.pojo.Field; +import org.apache.arrow.vector.types.pojo.FieldType; +import org.apache.arrow.vector.types.pojo.Schema; +import org.junit.jupiter.api.Test; + +import org.apache.hadoop.fs.azurebfs.AbfsConfiguration; +import org.apache.hadoop.fs.azurebfs.contracts.exceptions.AbfsDriverException; +import org.apache.hadoop.fs.azurebfs.contracts.exceptions.AzureBlobFileSystemException; + +import static org.apache.hadoop.fs.azurebfs.constants.AbfsHttpConstants.APPLICATION_APACHE_ARROW_STREAM; +import static org.apache.hadoop.fs.azurebfs.constants.AbfsHttpConstants.APPLICATION_XML; +import static org.apache.hadoop.fs.azurebfs.constants.HttpHeaderConfigurations.ACCEPT; +import static org.apache.hadoop.fs.azurebfs.constants.HttpHeaderConfigurations.CONTENT_TYPE; +import static org.apache.hadoop.fs.azurebfs.services.AbfsErrors.ERR_ARROW_LIST_PARSING; +import static org.apache.hadoop.test.LambdaTestUtils.intercept; +import static org.assertj.core.api.Assertions.assertThat; +import static org.mockito.Mockito.doReturn; +import static org.mockito.Mockito.mock; +import static org.mockito.Mockito.CALLS_REAL_METHODS; +import static org.mockito.Mockito.withSettings; + +/** + * Unit tests for the Photon (Apache Arrow based ListBlob) request header + * behavior of {@link AbfsBlobClient#applyPhotonRequestHeadersIfEnabled(List)}. + */ +public class TestAbfsBlobClientPhotonHeaders { + + /** Row count large enough to exhaust the tiny allocator limit. */ + private static final int OVER_LIMIT_ROW_COUNT = 2000; + + private AbfsBlobClient clientWithPhoton(final boolean photonEnabled) { + return clientWithPhoton(photonEnabled, false); + } + + private AbfsBlobClient clientWithPhoton(final boolean photonEnabled, + final boolean namespaceEnabled) { + AbfsConfiguration configuration = mock(AbfsConfiguration.class); + doReturn(photonEnabled).when(configuration).isPhotonEnabled(); + AbfsBlobClient client = mock(AbfsBlobClient.class, + withSettings().defaultAnswer(CALLS_REAL_METHODS)); + doReturn(configuration).when(client).getAbfsConfiguration(); + try { + doReturn(namespaceEnabled).when(client).getIsNamespaceEnabled(); + } catch (AzureBlobFileSystemException e) { + throw new RuntimeException(e); + } + return client; + } + + private List<AbfsHttpHeader> defaultHeaders() { + List<AbfsHttpHeader> headers = new ArrayList<>(); + headers.add(new AbfsHttpHeader(ACCEPT, "application/json, application/xml")); + return headers; + } + + private String acceptValue(final List<AbfsHttpHeader> headers) { + return headers.stream() + .filter(header -> ACCEPT.equals(header.getName())) + .map(AbfsHttpHeader::getValue) + .findFirst() + .orElse(null); + } + + /** + * Verify Arrow request headers are added when Photon is enabled. + */ + @Test + public void testAcceptHeaderOverriddenWhenPhotonEnabled() throws Exception { + AbfsBlobClient client = clientWithPhoton(true); + List<AbfsHttpHeader> headers = defaultHeaders(); + + boolean photonRequested = client.applyPhotonRequestHeadersIfEnabled(headers); + + assertThat(photonRequested) + .as("Arrow should be requested when Photon is enabled") + .isTrue(); + long acceptCount = headers.stream() + .filter(header -> ACCEPT.equals(header.getName())) + .count(); + assertThat(acceptCount).isEqualTo(1); + assertThat(acceptValue(headers)) + .isEqualTo(APPLICATION_APACHE_ARROW_STREAM + ", " + APPLICATION_XML); + } + + /** + * Verify Arrow is not requested on a hierarchical-namespace (HNS) account + * even when Photon is enabled, since the Blob endpoint rejects an Arrow + * ListBlobs request on HNS with a 409 that the XML fallback cannot recover. + */ + @Test + public void testAcceptHeaderUnchangedOnHnsAccount() throws Exception { + AbfsBlobClient client = clientWithPhoton(true, true); + List<AbfsHttpHeader> headers = defaultHeaders(); + + boolean photonRequested = client.applyPhotonRequestHeadersIfEnabled(headers); + + assertThat(photonRequested) + .as("Arrow should not be requested on an HNS account") + .isFalse(); + assertThat(acceptValue(headers)) + .isEqualTo("application/json, application/xml"); + } + + /** + * Verify the existing Accept header is left unchanged when Photon is disabled. + */ + @Test + public void testAcceptHeaderUnchangedWhenPhotonDisabled() throws Exception { Review Comment: The condition is !isPhotonEnabled() || getIsNamespaceEnabled(), so when Photon is off we must never call getIsNamespaceEnabled() — that can be a live network probe on first use, and calling it on every listPath when the feature is disabled would be a regression for all existing customers. Please add verify(client, never()).getIsNamespaceEnabled(); so the short-circuit is locked in. -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: [email protected] For queries about this service, please contact Infrastructure at: [email protected] --------------------------------------------------------------------- To unsubscribe, e-mail: [email protected] For additional commands, e-mail: [email protected]
