| /** |
| * 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.IOException; |
| import java.io.InputStream; |
| import java.io.OutputStream; |
| import java.util.Arrays; |
| |
| import org.junit.Test; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| import org.apache.hadoop.fs.azure.integration.AzureTestUtils; |
| import org.apache.hadoop.fs.permission.FsPermission; |
| import org.apache.hadoop.fs.permission.PermissionStatus; |
| |
| /** |
| * Handle OOB IO into a shared container. |
| */ |
| public class ITestAzureConcurrentOutOfBandIo extends AbstractWasbTestBase { |
| |
| private static final Logger LOG = |
| LoggerFactory.getLogger(ITestAzureConcurrentOutOfBandIo.class); |
| |
| // Class constants. |
| static final int DOWNLOAD_BLOCK_SIZE = 8 * 1024 * 1024; |
| static final int UPLOAD_BLOCK_SIZE = 4 * 1024 * 1024; |
| static final int BLOB_SIZE = 32 * 1024 * 1024; |
| |
| // Number of blocks to be written before flush. |
| static final int NUMBER_OF_BLOCKS = 2; |
| |
| @Override |
| protected AzureBlobStorageTestAccount createTestAccount() throws Exception { |
| return AzureBlobStorageTestAccount.createOutOfBandStore( |
| UPLOAD_BLOCK_SIZE, DOWNLOAD_BLOCK_SIZE); |
| } |
| |
| class DataBlockWriter implements Runnable { |
| |
| Thread runner; |
| AzureBlobStorageTestAccount writerStorageAccount; |
| String key; |
| boolean done = false; |
| |
| /** |
| * Constructor captures the test account. |
| * |
| * @param testAccount |
| */ |
| public DataBlockWriter(AzureBlobStorageTestAccount testAccount, String key) { |
| writerStorageAccount = testAccount; |
| this.key = key; |
| } |
| |
| /** |
| * Start writing blocks to Azure storage. |
| */ |
| public void startWriting() { |
| runner = new Thread(this); // Create the block writer thread. |
| runner.start(); // Start the block writer thread. |
| } |
| |
| /** |
| * Stop writing blocks to Azure storage. |
| */ |
| public void stopWriting() { |
| done = true; |
| } |
| |
| /** |
| * Implementation of the runnable interface. The run method is a tight loop |
| * which repeatedly updates the blob with a 4 MB block. |
| */ |
| public void run() { |
| byte[] dataBlockWrite = new byte[UPLOAD_BLOCK_SIZE]; |
| |
| OutputStream outputStream = null; |
| |
| try { |
| for (int i = 0; !done; i++) { |
| // Write two 4 MB blocks to the blob. |
| // |
| outputStream = writerStorageAccount.getStore().storefile( |
| key, |
| new PermissionStatus("", "", FsPermission.getDefault()), |
| key); |
| |
| Arrays.fill(dataBlockWrite, (byte) (i % 256)); |
| for (int j = 0; j < NUMBER_OF_BLOCKS; j++) { |
| outputStream.write(dataBlockWrite); |
| } |
| |
| outputStream.flush(); |
| outputStream.close(); |
| } |
| } catch (AzureException e) { |
| LOG.error("DatablockWriter thread encountered a storage exception." |
| + e.getMessage(), e); |
| } catch (IOException e) { |
| LOG.error("DatablockWriter thread encountered an I/O exception." |
| + e.getMessage(), e); |
| } |
| } |
| } |
| |
| @Test |
| public void testReadOOBWrites() throws Exception { |
| |
| byte[] dataBlockWrite = new byte[UPLOAD_BLOCK_SIZE]; |
| byte[] dataBlockRead = new byte[UPLOAD_BLOCK_SIZE]; |
| |
| // Write to blob to make sure it exists. |
| // |
| // Write five 4 MB blocks to the blob. To ensure there is data in the blob before |
| // reading. This eliminates the race between the reader and writer threads. |
| String key = "WASB_String" + AzureTestUtils.getForkID() + ".txt"; |
| OutputStream outputStream = testAccount.getStore().storefile( |
| key, |
| new PermissionStatus("", "", FsPermission.getDefault()), |
| key); |
| Arrays.fill(dataBlockWrite, (byte) 255); |
| for (int i = 0; i < NUMBER_OF_BLOCKS; i++) { |
| outputStream.write(dataBlockWrite); |
| } |
| |
| outputStream.flush(); |
| outputStream.close(); |
| |
| // Start writing blocks to Azure store using the DataBlockWriter thread. |
| DataBlockWriter writeBlockTask = new DataBlockWriter(testAccount, key); |
| writeBlockTask.startWriting(); |
| int count = 0; |
| |
| for (int i = 0; i < 5; i++) { |
| try(InputStream inputStream = testAccount.getStore().retrieve(key)) { |
| count = 0; |
| int c = 0; |
| |
| while (c >= 0) { |
| c = inputStream.read(dataBlockRead, 0, UPLOAD_BLOCK_SIZE); |
| if (c < 0) { |
| break; |
| } |
| |
| // Counting the number of bytes. |
| count += c; |
| } |
| } catch (IOException e) { |
| System.out.println(e.getCause().toString()); |
| e.printStackTrace(); |
| fail(); |
| } |
| } |
| |
| // Stop writing blocks. |
| writeBlockTask.stopWriting(); |
| |
| // Validate that a block was read. |
| assertEquals(NUMBER_OF_BLOCKS * UPLOAD_BLOCK_SIZE, count); |
| } |
| } |