| /** |
| * 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.azure; |
| |
| import java.io.ByteArrayInputStream; |
| import java.io.InputStream; |
| import java.io.OutputStream; |
| |
| import org.apache.hadoop.fs.Path; |
| |
| import org.junit.Ignore; |
| import org.junit.Test; |
| |
| /** |
| * Tests for the upload, buffering and flush logic in WASB. |
| */ |
| public class TestNativeAzureFileSystemUploadLogic extends AbstractWasbTestBase { |
| |
| // Just an arbitrary number so that the values I write have a predictable |
| // pattern: 0, 1, 2, .. , 45, 46, 0, 1, 2, ... |
| static final int byteValuePeriod = 47; |
| |
| @Override |
| protected AzureBlobStorageTestAccount createTestAccount() throws Exception { |
| return AzureBlobStorageTestAccount.createMock(); |
| } |
| |
| /** |
| * Various scenarios to test in how often we flush data while uploading. |
| */ |
| private enum FlushFrequencyVariation { |
| /** |
| * Flush before even a single in-memory buffer is full. |
| */ |
| BeforeSingleBufferFull, |
| /** |
| * Flush after a single in-memory buffer is full. |
| */ |
| AfterSingleBufferFull, |
| /** |
| * Flush after all the in-memory buffers got full and were |
| * automatically flushed to the backing store. |
| */ |
| AfterAllRingBufferFull, |
| } |
| |
| /** |
| * Tests that we upload consistently if we flush after every little |
| * bit of data. |
| */ |
| @Test |
| @Ignore /* flush() no longer does anything. @@TODO: implement a force-flush and reinstate this test */ |
| public void testConsistencyAfterSmallFlushes() throws Exception { |
| testConsistencyAfterManyFlushes(FlushFrequencyVariation.BeforeSingleBufferFull); |
| } |
| |
| /** |
| * Tests that we upload consistently if we flush after every medium-sized |
| * bit of data. |
| */ |
| @Test |
| @Ignore /* flush() no longer does anything. @@TODO: implement a force-flush and reinstate this test */ |
| public void testConsistencyAfterMediumFlushes() throws Exception { |
| testConsistencyAfterManyFlushes(FlushFrequencyVariation.AfterSingleBufferFull); |
| } |
| |
| /** |
| * Tests that we upload consistently if we flush after every large chunk |
| * of data. |
| */ |
| @Test |
| @Ignore /* flush() no longer does anything. @@TODO: implement a force-flush and reinstate this test */ |
| public void testConsistencyAfterLargeFlushes() throws Exception { |
| testConsistencyAfterManyFlushes(FlushFrequencyVariation.AfterAllRingBufferFull); |
| } |
| |
| /** |
| * Makes sure the data in the given input is what I'd expect. |
| * @param inStream The input stream. |
| * @param expectedSize The expected size of the data in there. |
| */ |
| private void assertDataInStream(InputStream inStream, int expectedSize) |
| throws Exception { |
| int byteRead; |
| int countBytes = 0; |
| while ((byteRead = inStream.read()) != -1) { |
| assertEquals(countBytes % byteValuePeriod, byteRead); |
| countBytes++; |
| } |
| assertEquals(expectedSize, countBytes); |
| } |
| |
| /** |
| * Checks that the data in the given file is what I'd expect. |
| * @param file The file to check. |
| * @param expectedSize The expected size of the data in there. |
| */ |
| private void assertDataInFile(Path file, int expectedSize) throws Exception { |
| try(InputStream inStream = getFileSystem().open(file)) { |
| assertDataInStream(inStream, expectedSize); |
| } |
| } |
| |
| /** |
| * Checks that the data in the current temporary upload blob |
| * is what I'd expect. |
| * @param expectedSize The expected size of the data in there. |
| */ |
| private void assertDataInTempBlob(int expectedSize) throws Exception { |
| // Look for the temporary upload blob in the backing store. |
| InMemoryBlockBlobStore backingStore = |
| getTestAccount().getMockStorage().getBackingStore(); |
| String tempKey = null; |
| for (String key : backingStore.getKeys()) { |
| if (key.contains(NativeAzureFileSystem.AZURE_TEMP_FOLDER)) { |
| // Assume this is the one we're looking for. |
| tempKey = key; |
| break; |
| } |
| } |
| assertNotNull(tempKey); |
| try (InputStream inStream = new ByteArrayInputStream( |
| backingStore.getContent(tempKey))) { |
| assertDataInStream(inStream, expectedSize); |
| } |
| } |
| |
| /** |
| * Tests the given scenario for uploading a file while flushing |
| * periodically and making sure the data is always consistent |
| * with what I'd expect. |
| * @param variation The variation/scenario to test. |
| */ |
| private void testConsistencyAfterManyFlushes(FlushFrequencyVariation variation) |
| throws Exception { |
| Path uploadedFile = methodPath(); |
| try { |
| OutputStream outStream = getFileSystem().create(uploadedFile); |
| final int totalSize = 9123; |
| int flushPeriod; |
| switch (variation) { |
| case BeforeSingleBufferFull: flushPeriod = 300; break; |
| case AfterSingleBufferFull: flushPeriod = 600; break; |
| case AfterAllRingBufferFull: flushPeriod = 1600; break; |
| default: |
| throw new IllegalArgumentException("Unknown variation: " + variation); |
| } |
| for (int i = 0; i < totalSize; i++) { |
| outStream.write(i % byteValuePeriod); |
| if ((i + 1) % flushPeriod == 0) { |
| outStream.flush(); |
| assertDataInTempBlob(i + 1); |
| } |
| } |
| outStream.close(); |
| assertDataInFile(uploadedFile, totalSize); |
| } finally { |
| getFileSystem().delete(uploadedFile, false); |
| |
| } |
| } |
| } |