/**
* 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.hbase.master.snapshot;
import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertTrue;
import java.io.IOException;
import java.util.Collection;
import java.util.HashSet;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.hadoop.fs.FileSystem;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.hbase.HBaseTestingUtility;
import org.apache.hadoop.hbase.HConstants;
import org.apache.hadoop.hbase.MediumTests;
import org.apache.hadoop.hbase.protobuf.generated.HBaseProtos.SnapshotDescription;
import org.apache.hadoop.hbase.snapshot.SnapshotDescriptionUtils;
import org.apache.hadoop.hbase.snapshot.SnapshotReferenceUtil;
import org.apache.hadoop.hbase.snapshot.TakeSnapshotUtils;
import org.apache.hadoop.hbase.util.FSUtils;
import org.junit.After;
import org.junit.AfterClass;
import org.junit.BeforeClass;
import org.junit.Test;
import org.junit.experimental.categories.Category;
/**
* Test that we correctly reload the cache, filter directories, etc.
*/
@Category(MediumTests.class)
public class TestSnapshotFileCache {
private static final Log LOG = LogFactory.getLog(TestSnapshotFileCache.class);
private static final HBaseTestingUtility UTIL = new HBaseTestingUtility();
private static FileSystem fs;
private static Path rootDir;
@BeforeClass
public static void startCluster() throws Exception {
UTIL.startMiniDFSCluster(1);
fs = UTIL.getDFSCluster().getFileSystem();
rootDir = UTIL.getDefaultRootDirPath();
}
@AfterClass
public static void stopCluster() throws Exception {
UTIL.shutdownMiniDFSCluster();
}
@After
public void cleanupFiles() throws Exception {
// cleanup the snapshot directory
Path snapshotDir = SnapshotDescriptionUtils.getSnapshotsDir(rootDir);
fs.delete(snapshotDir, true);
}
@Test(timeout = 10000000)
public void testLoadAndDelete() throws Exception {
// don't refresh the cache unless we tell it to
long period = Long.MAX_VALUE;
Path snapshotDir = SnapshotDescriptionUtils.getSnapshotsDir(rootDir);
SnapshotFileCache cache = new SnapshotFileCache(fs, rootDir, period, 10000000,
"test-snapshot-file-cache-refresh", new SnapshotFiles());
Path snapshot = new Path(snapshotDir, "snapshot");
Path region = new Path(snapshot, "7e91021");
Path family = new Path(region, "fam");
Path file1 = new Path(family, "file1");
Path file2 = new Path(family, "file2");
// create two hfiles under the snapshot
fs.create(file1);
fs.create(file2);
FSUtils.logFileSystemState(fs, rootDir, LOG);
// then make sure the cache finds them
assertTrue("Cache didn't find:" + file1, cache.contains(file1.getName()));
assertTrue("Cache didn't find:" + file2, cache.contains(file2.getName()));
String not = "file-shouldn't-be-found";
assertFalse("Cache found '" + not + "', but it shouldn't have.", cache.contains(not));
// make sure we get a little bit of separation in the modification times
// its okay if we sleep a little longer (b/c of GC pause), as long as we sleep a little
Thread.sleep(10);
LOG.debug("Deleting snapshot.");
// then delete the snapshot and make sure that we can still find the files
if (!fs.delete(snapshot, true)) {
throw new IOException("Couldn't delete " + snapshot + " for an unknown reason.");
}
FSUtils.logFileSystemState(fs, rootDir, LOG);
LOG.debug("Checking to see if file is deleted.");
assertTrue("Cache didn't find:" + file1, cache.contains(file1.getName()));
assertTrue("Cache didn't find:" + file2, cache.contains(file2.getName()));
// then trigger a refresh
cache.triggerCacheRefreshForTesting();
// and not it shouldn't find those files
assertFalse("Cache found '" + file1 + "', but it shouldn't have.",
cache.contains(file1.getName()));
assertFalse("Cache found '" + file2 + "', but it shouldn't have.",
cache.contains(file2.getName()));
fs.delete(snapshotDir, true);
}
@Test
public void testLoadsTmpDir() throws Exception {
// don't refresh the cache unless we tell it to
long period = Long.MAX_VALUE;
Path snapshotDir = SnapshotDescriptionUtils.getSnapshotsDir(rootDir);
SnapshotFileCache cache = new SnapshotFileCache(fs, rootDir, period, 10000000,
"test-snapshot-file-cache-refresh", new SnapshotFiles());
// create a file in a 'completed' snapshot
Path snapshot = new Path(snapshotDir, "snapshot");
Path region = new Path(snapshot, "7e91021");
Path family = new Path(region, "fam");
Path file1 = new Path(family, "file1");
fs.create(file1);
// create an 'in progress' snapshot
SnapshotDescription desc = SnapshotDescription.newBuilder().setName("working").build();
snapshot = SnapshotDescriptionUtils.getWorkingSnapshotDir(desc, rootDir);
region = new Path(snapshot, "7e91021");
family = new Path(region, "fam");
Path file2 = new Path(family, "file2");
fs.create(file2);
FSUtils.logFileSystemState(fs, rootDir, LOG);
// then make sure the cache finds both files
assertTrue("Cache didn't find:" + file1, cache.contains(file1.getName()));
assertTrue("Cache didn't find:" + file2, cache.contains(file2.getName()));
}
@Test
public void testJustFindLogsDirectory() throws Exception {
// don't refresh the cache unless we tell it to
long period = Long.MAX_VALUE;
Path snapshotDir = SnapshotDescriptionUtils.getSnapshotsDir(rootDir);
SnapshotFileCache cache = new SnapshotFileCache(fs, rootDir, period, 10000000,
"test-snapshot-file-cache-refresh", new SnapshotFileCache.SnapshotFileInspector() {
public Collection<String> filesUnderSnapshot(final Path snapshotDir)
throws IOException {
return SnapshotReferenceUtil.getHLogNames(fs, snapshotDir);
}
});
// create a file in a 'completed' snapshot
Path snapshot = new Path(snapshotDir, "snapshot");
Path region = new Path(snapshot, "7e91021");
Path family = new Path(region, "fam");
Path file1 = new Path(family, "file1");
fs.create(file1);
// and another file in the logs directory
Path logs = TakeSnapshotUtils.getSnapshotHLogsDir(snapshot, "server");
Path log = new Path(logs, "me.hbase.com%2C58939%2C1350424310315.1350424315552");
fs.create(log);
FSUtils.logFileSystemState(fs, rootDir, LOG);
// then make sure the cache only finds the log files
assertFalse("Cache found '" + file1 + "', but it shouldn't have.",
cache.contains(file1.getName()));
assertTrue("Cache didn't find:" + log, cache.contains(log.getName()));
}
@Test
public void testReloadModifiedDirectory() throws IOException {
// don't refresh the cache unless we tell it to
long period = Long.MAX_VALUE;
Path snapshotDir = SnapshotDescriptionUtils.getSnapshotsDir(rootDir);
SnapshotFileCache cache = new SnapshotFileCache(fs, rootDir, period, 10000000,
"test-snapshot-file-cache-refresh", new SnapshotFiles());
Path snapshot = new Path(snapshotDir, "snapshot");
Path region = new Path(snapshot, "7e91021");
Path family = new Path(region, "fam");
Path file1 = new Path(family, "file1");
Path file2 = new Path(family, "file2");
// create two hfiles under the snapshot
fs.create(file1);
fs.create(file2);
FSUtils.logFileSystemState(fs, rootDir, LOG);
assertTrue("Cache didn't find " + file1, cache.contains(file1.getName()));
// now delete the snapshot and add a file with a different name
fs.delete(snapshot, true);
Path file3 = new Path(family, "new_file");
fs.create(file3);
FSUtils.logFileSystemState(fs, rootDir, LOG);
assertTrue("Cache didn't find new file:" + file3, cache.contains(file3.getName()));
}
class SnapshotFiles implements SnapshotFileCache.SnapshotFileInspector {
public Collection<String> filesUnderSnapshot(final Path snapshotDir) throws IOException {
Collection<String> files = new HashSet<String>();
files.addAll(SnapshotReferenceUtil.getHLogNames(fs, snapshotDir));
files.addAll(SnapshotReferenceUtil.getHFileNames(fs, snapshotDir));
return files;
}
};
}