/**
* 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 static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertNotNull;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.FSDataOutputStream;
import org.apache.hadoop.fs.FileStatus;
import org.apache.hadoop.fs.FileSystem;
import org.apache.hadoop.fs.Path;
import org.junit.After;
import org.junit.Before;
import org.junit.Ignore;
import org.junit.Test;
public class TestWasbFsck {
private AzureBlobStorageTestAccount testAccount;
private FileSystem fs;
private InMemoryBlockBlobStore backingStore;
@Before
public void setUp() throws Exception {
testAccount = AzureBlobStorageTestAccount.createMock();
fs = testAccount.getFileSystem();
backingStore = testAccount.getMockStorage().getBackingStore();
}
@After
public void tearDown() throws Exception {
testAccount.cleanup();
fs = null;
backingStore = null;
}
/**
* Counts the number of temporary blobs in the backing store.
*/
private int getNumTempBlobs() {
int count = 0;
for (String key : backingStore.getKeys()) {
if (key.contains(NativeAzureFileSystem.AZURE_TEMP_FOLDER)) {
count++;
}
}
return count;
}
/**
* Tests that we recover files properly
*/
@Test
@Ignore /* flush() no longer does anything @@TODO: reinstate an appropriate test of fsck recovery*/
public void testRecover() throws Exception {
Path danglingFile = new Path("/crashedInTheMiddle");
// Create a file and leave it dangling and try to recover it.
FSDataOutputStream stream = fs.create(danglingFile);
stream.write(new byte[] { 1, 2, 3 });
stream.flush();
// Now we should still only see a zero-byte file in this place
FileStatus fileStatus = fs.getFileStatus(danglingFile);
assertNotNull(fileStatus);
assertEquals(0, fileStatus.getLen());
assertEquals(1, getNumTempBlobs());
// Run WasbFsck -move to recover the file.
runFsck("-move");
// Now we should the see the file in lost+found with the data there.
fileStatus = fs.getFileStatus(new Path("/lost+found",
danglingFile.getName()));
assertNotNull(fileStatus);
assertEquals(3, fileStatus.getLen());
assertEquals(0, getNumTempBlobs());
// But not in its original location
assertFalse(fs.exists(danglingFile));
}
private void runFsck(String command) throws Exception {
Configuration conf = fs.getConf();
// Set the dangling cutoff to zero, so every temp blob is considered
// dangling.
conf.setInt(NativeAzureFileSystem.AZURE_TEMP_EXPIRY_PROPERTY_NAME, 0);
WasbFsck fsck = new WasbFsck(conf);
fsck.setMockFileSystemForTesting(fs);
fsck.run(new String[] { AzureBlobStorageTestAccount.MOCK_WASB_URI, command });
}
/**
* Tests that we delete dangling files properly
*/
@Test
public void testDelete() throws Exception {
Path danglingFile = new Path("/crashedInTheMiddle");
// Create a file and leave it dangling and try to delete it.
FSDataOutputStream stream = fs.create(danglingFile);
stream.write(new byte[] { 1, 2, 3 });
stream.flush();
// Now we should still only see a zero-byte file in this place
FileStatus fileStatus = fs.getFileStatus(danglingFile);
assertNotNull(fileStatus);
assertEquals(0, fileStatus.getLen());
assertEquals(1, getNumTempBlobs());
// Run WasbFsck -delete to delete the file.
runFsck("-delete");
// Now we should see no trace of the file.
assertEquals(0, getNumTempBlobs());
assertFalse(fs.exists(danglingFile));
}
}