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// Copyright Vespa.ai. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.vespa.config.server.filedistribution;
import com.yahoo.cloud.config.ConfigserverConfig;
import com.yahoo.config.FileReference;
import com.yahoo.io.IOUtils;
import com.yahoo.jrt.Supervisor;
import com.yahoo.jrt.Transport;
import com.yahoo.net.HostName;
import com.yahoo.vespa.filedistribution.FileDownloader;
import com.yahoo.vespa.filedistribution.FileReferenceCompressor;
import com.yahoo.vespa.filedistribution.FileReferenceData;
import com.yahoo.vespa.filedistribution.FileReferenceDownload;
import org.junit.Before;
import org.junit.Rule;
import org.junit.Test;
import org.junit.rules.TemporaryFolder;
import java.io.File;
import java.io.IOException;
import java.time.Duration;
import java.util.ArrayList;
import java.util.List;
import java.util.Set;
import java.util.concurrent.CompletableFuture;
import java.util.concurrent.ExecutionException;
import static com.yahoo.vespa.filedistribution.FileReferenceData.CompressionType.gzip;
import static com.yahoo.vespa.filedistribution.FileReferenceData.CompressionType.lz4;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertTrue;
import static org.junit.jupiter.api.Assertions.fail;
public class FileServerTest {
private FileServer fileServer;
@Rule
public TemporaryFolder temporaryFolder = new TemporaryFolder();
@Before
public void setup() throws IOException {
File rootDir = new File(temporaryFolder.newFolder("fileserver-root").getAbsolutePath());
fileServer = new FileServer(new MockFileDownloader(rootDir), List.of(gzip, lz4), new FileDirectory(rootDir));
}
@Test
public void requireThatExistingFileIsFound() throws IOException {
String dir = "123";
writeFile(dir);
assertTrue(fileServer.hasFile(dir));
}
@Test
public void requireThatNonExistingFileIsNotFound() {
assertFalse(fileServer.hasFile("12x"));
}
@Test
public void requireThatNonExistingFileWillBeDownloaded() throws IOException {
String dir = "123";
assertFalse(fileServer.hasFile(dir));
FileReferenceDownload foo = new FileReferenceDownload(new FileReference(dir), "test");
assertFalse(fileServer.getFileDownloadIfNeeded(foo).isPresent());
writeFile(dir);
assertTrue(fileServer.getFileDownloadIfNeeded(foo).isPresent());
}
@Test
public void requireThatFileReferenceWithDirectoryCanBeFound() throws IOException {
File dir = getFileServerRootDir();
IOUtils.writeFile(dir + "/124/subdir/f1", "test", false);
IOUtils.writeFile(dir + "/124/subdir/f2", "test", false);
assertTrue(fileServer.hasFile("124/subdir"));
}
@Test
public void requireThatWeCanReplayFile() throws IOException, InterruptedException, ExecutionException {
File dir = getFileServerRootDir();
IOUtils.writeFile(dir + "/12y/f1", "dummy-data", true);
CompletableFuture<byte []> content = new CompletableFuture<>();
FileReference fileReference = new FileReference("12y");
var file = fileServer.getFileDownloadIfNeeded(new FileReferenceDownload(fileReference, "test"));
fileServer.startFileServing(fileReference, file.get(), new FileReceiver(content), Set.of(gzip));
assertEquals(new String(content.get()), "dummy-data");
}
@Test
public void requireThatWeCanReplayDirWithLz4() throws IOException, InterruptedException, ExecutionException {
File rootDir = new File(temporaryFolder.newFolder("fileserver-root-3").getAbsolutePath());
fileServer = new FileServer(new MockFileDownloader(rootDir), List.of(lz4, gzip), new FileDirectory(rootDir)); // prefer lz4
File dir = getFileServerRootDir();
IOUtils.writeFile(dir + "/subdir/12z/f1", "dummy-data-2", true);
CompletableFuture<byte []> content = new CompletableFuture<>();
FileReference fileReference = new FileReference("subdir");
var file = fileServer.getFileDownloadIfNeeded(new FileReferenceDownload(fileReference, "test"));
fileServer.startFileServing(fileReference, file.get(), new FileReceiver(content), Set.of(gzip, lz4));
// Decompress with lz4 and check contents
var compressor = new FileReferenceCompressor(FileReferenceData.Type.compressed, lz4);
File downloadedFileCompressed = new File(dir + "/downloaded-file-compressed");
IOUtils.writeFile(downloadedFileCompressed, content.get());
File downloadedFileUncompressed = new File(dir + "/downloaded-file-uncompressed");
compressor.decompress(downloadedFileCompressed, downloadedFileUncompressed);
assertTrue(downloadedFileUncompressed.isDirectory());
assertEquals("dummy-data-2", IOUtils.readFile(new File(downloadedFileUncompressed, "12z/f1")));
}
@Test
public void requireThatDifferentNumberOfConfigServersWork() throws IOException {
// Empty connection pool in tests etc.
ConfigserverConfig.Builder builder = new ConfigserverConfig.Builder()
.configServerDBDir(temporaryFolder.newFolder("serverdb").getAbsolutePath())
.configDefinitionsDir(temporaryFolder.newFolder("configdefinitions").getAbsolutePath());
FileServer fileServer = createFileServer(builder);
assertEquals(0, fileServer.downloader().connectionPool().getSize());
// Empty connection pool when only one server, no use in downloading from yourself
List<ConfigserverConfig.Zookeeperserver.Builder> servers = new ArrayList<>();
ConfigserverConfig.Zookeeperserver.Builder serverBuilder = new ConfigserverConfig.Zookeeperserver.Builder();
serverBuilder.hostname(HostName.getLocalhost());
serverBuilder.port(123456);
servers.add(serverBuilder);
builder.zookeeperserver(servers);
fileServer = createFileServer(builder);
assertEquals(0, fileServer.downloader().connectionPool().getSize());
// connection pool of size 1 when 2 servers
ConfigserverConfig.Zookeeperserver.Builder serverBuilder2 = new ConfigserverConfig.Zookeeperserver.Builder();
serverBuilder2.hostname("bar");
serverBuilder2.port(123456);
servers.add(serverBuilder2);
builder.zookeeperserver(servers);
fileServer = createFileServer(builder);
assertEquals(1, fileServer.downloader().connectionPool().getSize());
}
@Test
public void requireThatErrorsAreHandled() throws IOException, ExecutionException, InterruptedException {
File dir = getFileServerRootDir();
IOUtils.writeFile(dir + "/12y/f1", "dummy-data", true);
CompletableFuture<byte []> content = new CompletableFuture<>();
FailingFileReceiver fileReceiver = new FailingFileReceiver(content);
// Should fail the first time, see FailingFileReceiver
FileReference reference = new FileReference("12y");
var file = fileServer.getFileDownloadIfNeeded(new FileReferenceDownload(reference, "test"));
try {
fileServer.startFileServing(reference, file.get(), fileReceiver, Set.of(gzip));
fail("Should have failed");
} catch (RuntimeException e) {
// expected
}
fileServer.startFileServing(reference, file.get(), fileReceiver, Set.of(gzip));
assertEquals(new String(content.get()), "dummy-data");
}
private void writeFile(String dir) throws IOException {
File rootDir = getFileServerRootDir();
IOUtils.createDirectory(rootDir + "/" + dir);
IOUtils.writeFile(rootDir + "/" + dir + "/f1", "test", false);
}
private FileServer createFileServer(ConfigserverConfig.Builder configBuilder) throws IOException {
File fileReferencesDir = temporaryFolder.newFolder();
configBuilder.fileReferencesDir(fileReferencesDir.getAbsolutePath());
return new FileServer(new ConfigserverConfig(configBuilder), new FileDirectory(fileReferencesDir));
}
private static class FileReceiver implements FileServer.Receiver {
final CompletableFuture<byte []> content;
FileReceiver(CompletableFuture<byte []> content) {
this.content = content;
}
@Override
public void receive(FileReferenceData fileData, FileServer.ReplayStatus status) {
this.content.complete(fileData.content().array());
}
}
private static class FailingFileReceiver implements FileServer.Receiver {
final CompletableFuture<byte []> content;
int counter = 0;
FailingFileReceiver(CompletableFuture<byte []> content) {
this.content = content;
}
@Override
public void receive(FileReferenceData fileData, FileServer.ReplayStatus status) {
counter++;
if (counter <= 1)
throw new RuntimeException("Failed to receive file");
else {
this.content.complete(fileData.content().array());
}
}
}
private File getFileServerRootDir() {
return fileServer.getRootDir().getRoot();
}
private static class MockFileDownloader extends FileDownloader {
public MockFileDownloader(File downloadDirectory) {
super(FileDownloader.emptyConnectionPool(),
new Supervisor(new Transport("mock")).setDropEmptyBuffers(true),
downloadDirectory,
Duration.ofMillis(100),
Duration.ofMillis(100));
}
}
}
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