/**
* Copyright 2010 The Apache Software Foundation
*
* 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.regionserver.wal;
import static org.junit.Assert.*;
import java.io.IOException;
import java.util.NavigableSet;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.FSDataOutputStream;
import org.apache.hadoop.fs.FileSystem;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.hbase.HBaseTestingUtility;
import org.apache.hadoop.hbase.KeyValueTestUtil;
import org.apache.hadoop.hbase.MultithreadedTestUtil;
import org.apache.hadoop.hbase.MultithreadedTestUtil.TestContext;
import org.apache.hadoop.hbase.MultithreadedTestUtil.TestThread;
import org.apache.hadoop.hbase.regionserver.wal.HLogSplitter.EntryBuffers;
import org.apache.hadoop.hbase.regionserver.wal.HLogSplitter.RegionEntryBuffer;
import org.apache.hadoop.hbase.util.Bytes;
import org.junit.Test;
import static org.mockito.Mockito.mock;
/**
* Simple testing of a few HLog methods.
*/
public class TestHLogMethods {
private static final byte[] TEST_REGION = Bytes.toBytes("test_region");;
private static final byte[] TEST_TABLE = Bytes.toBytes("test_table");
private final HBaseTestingUtility util = new HBaseTestingUtility();
/**
* Assert that getSplitEditFilesSorted returns files in expected order and
* that it skips moved-aside files.
* @throws IOException
*/
@Test public void testGetSplitEditFilesSorted() throws IOException {
FileSystem fs = FileSystem.get(util.getConfiguration());
Path regiondir = HBaseTestingUtility.getTestDir("regiondir");
fs.delete(regiondir, true);
fs.mkdirs(regiondir);
Path recoverededits = HLog.getRegionDirRecoveredEditsDir(regiondir);
String first = HLogSplitter.formatRecoveredEditsFileName(-1);
createFile(fs, recoverededits, first);
createFile(fs, recoverededits, HLogSplitter.formatRecoveredEditsFileName(0));
createFile(fs, recoverededits, HLogSplitter.formatRecoveredEditsFileName(1));
createFile(fs, recoverededits, HLogSplitter
.formatRecoveredEditsFileName(11));
createFile(fs, recoverededits, HLogSplitter.formatRecoveredEditsFileName(2));
createFile(fs, recoverededits, HLogSplitter
.formatRecoveredEditsFileName(50));
String last = HLogSplitter.formatRecoveredEditsFileName(Long.MAX_VALUE);
createFile(fs, recoverededits, last);
createFile(fs, recoverededits,
Long.toString(Long.MAX_VALUE) + "." + System.currentTimeMillis());
NavigableSet<Path> files = HLog.getSplitEditFilesSorted(fs, regiondir);
assertEquals(7, files.size());
assertEquals(files.pollFirst().getName(), first);
assertEquals(files.pollLast().getName(), last);
assertEquals(files.pollFirst().getName(),
HLogSplitter
.formatRecoveredEditsFileName(0));
assertEquals(files.pollFirst().getName(),
HLogSplitter
.formatRecoveredEditsFileName(1));
assertEquals(files.pollFirst().getName(),
HLogSplitter
.formatRecoveredEditsFileName(2));
assertEquals(files.pollFirst().getName(),
HLogSplitter
.formatRecoveredEditsFileName(11));
}
private void createFile(final FileSystem fs, final Path testdir,
final String name)
throws IOException {
FSDataOutputStream fdos = fs.create(new Path(testdir, name), true);
fdos.close();
}
@Test
public void testRegionEntryBuffer() throws Exception {
HLogSplitter.RegionEntryBuffer reb = new HLogSplitter.RegionEntryBuffer(
TEST_TABLE, TEST_REGION);
assertEquals(0, reb.heapSize());
reb.appendEntry(createTestLogEntry(1));
assertTrue(reb.heapSize() > 0);
}
@Test
public void testEntrySink() throws Exception {
Configuration conf = new Configuration();
HLogSplitter splitter = HLogSplitter.createLogSplitter(
conf, mock(Path.class), mock(Path.class), mock(Path.class),
mock(FileSystem.class));
EntryBuffers sink = splitter.new EntryBuffers(1*1024*1024);
for (int i = 0; i < 1000; i++) {
HLog.Entry entry = createTestLogEntry(i);
sink.appendEntry(entry);
}
assertTrue(sink.totalBuffered > 0);
long amountInChunk = sink.totalBuffered;
// Get a chunk
RegionEntryBuffer chunk = sink.getChunkToWrite();
assertEquals(chunk.heapSize(), amountInChunk);
// Make sure it got marked that a thread is "working on this"
assertTrue(sink.isRegionCurrentlyWriting(TEST_REGION));
// Insert some more entries
for (int i = 0; i < 500; i++) {
HLog.Entry entry = createTestLogEntry(i);
sink.appendEntry(entry);
}
// Asking for another chunk shouldn't work since the first one
// is still writing
assertNull(sink.getChunkToWrite());
// If we say we're done writing the first chunk, then we should be able
// to get the second
sink.doneWriting(chunk);
RegionEntryBuffer chunk2 = sink.getChunkToWrite();
assertNotNull(chunk2);
assertNotSame(chunk, chunk2);
long amountInChunk2 = sink.totalBuffered;
// The second chunk had fewer rows than the first
assertTrue(amountInChunk2 < amountInChunk);
sink.doneWriting(chunk2);
assertEquals(0, sink.totalBuffered);
}
private HLog.Entry createTestLogEntry(int i) {
long seq = i;
long now = i * 1000;
WALEdit edit = new WALEdit();
edit.add(KeyValueTestUtil.create("row", "fam", "qual", 1234, "val"));
HLogKey key = new HLogKey(TEST_REGION, TEST_TABLE, seq, now);
HLog.Entry entry = new HLog.Entry(key, edit);
return entry;
}
}