/*
* 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.flink.runtime.io.disk.iomanager;
import org.apache.flink.core.memory.MemorySegment;
import org.apache.flink.runtime.io.disk.iomanager.FileIOChannel.ID;
import org.apache.flink.runtime.io.network.buffer.Buffer;
import org.junit.Rule;
import org.junit.Test;
import org.junit.rules.TemporaryFolder;
import java.io.File;
import java.io.IOException;
import java.util.List;
import java.util.concurrent.LinkedBlockingQueue;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertTrue;
public class IOManagerTest {
@Rule
public final TemporaryFolder temporaryFolder = new TemporaryFolder();
@Test
public void channelEnumerator() throws IOException {
IOManager ioMan = null;
try {
File tempPath = temporaryFolder.newFolder();
String[] tempDirs = new String[]{
new File(tempPath, "a").getAbsolutePath(),
new File(tempPath, "b").getAbsolutePath(),
new File(tempPath, "c").getAbsolutePath(),
new File(tempPath, "d").getAbsolutePath(),
new File(tempPath, "e").getAbsolutePath(),
};
int[] counters = new int[tempDirs.length];
ioMan = new TestIOManager(tempDirs);
FileIOChannel.Enumerator enumerator = ioMan.createChannelEnumerator();
for (int i = 0; i < 3 * tempDirs.length; i++) {
FileIOChannel.ID id = enumerator.next();
File path = id.getPathFile();
assertTrue("Channel IDs must name an absolute path.", path.isAbsolute());
assertFalse("Channel IDs must name a file, not a directory.", path.isDirectory());
assertTrue("Path is not in the temp directory.",
tempPath.equals(path.getParentFile().getParentFile().getParentFile()));
for (int k = 0; k < tempDirs.length; k++) {
if (path.getParentFile().getParent().equals(tempDirs[k])) {
counters[k]++;
}
}
}
for (int k = 0; k < tempDirs.length; k++) {
assertEquals(3, counters[k]);
}
}
finally {
if (ioMan != null) {
ioMan.shutdown();
}
}
}
// --------------------------------------------------------------------------------------------
private static class TestIOManager extends IOManager {
protected TestIOManager(String[] paths) {
super(paths);
}
@Override
public BlockChannelWriter<MemorySegment> createBlockChannelWriter(ID channelID, LinkedBlockingQueue<MemorySegment> returnQueue) {
throw new UnsupportedOperationException();
}
@Override
public BlockChannelWriterWithCallback<MemorySegment> createBlockChannelWriter(ID channelID, RequestDoneCallback<MemorySegment> callback) {
throw new UnsupportedOperationException();
}
@Override
public BlockChannelReader<MemorySegment> createBlockChannelReader(ID channelID, LinkedBlockingQueue<MemorySegment> returnQueue) {
throw new UnsupportedOperationException();
}
@Override
public BufferFileWriter createBufferFileWriter(ID channelID) throws IOException {
throw new UnsupportedOperationException();
}
@Override
public BufferFileReader createBufferFileReader(ID channelID, RequestDoneCallback<Buffer> callback) throws IOException {
throw new UnsupportedOperationException();
}
@Override
public BufferFileSegmentReader createBufferFileSegmentReader(ID channelID, RequestDoneCallback<FileSegment> callback) throws IOException {
throw new UnsupportedOperationException();
}
@Override
public BulkBlockChannelReader createBulkBlockChannelReader(ID channelID, List<MemorySegment> targetSegments, int numBlocks) {
throw new UnsupportedOperationException();
}
}
}