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/**
* 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.apache.hadoop.hbase.regionserver.wal.ProtobufLogReader.DEFAULT_WAL_TRAILER_WARN_SIZE;
import static org.apache.hadoop.hbase.regionserver.wal.ProtobufLogReader.WAL_TRAILER_WARN_SIZE;
import java.io.IOException;
import java.io.OutputStream;
import java.security.Key;
import java.util.concurrent.atomic.AtomicLong;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.FileSystem;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.hbase.HBaseInterfaceAudience;
import org.apache.hadoop.hbase.HConstants;
import org.apache.hadoop.hbase.codec.Codec;
import org.apache.hadoop.hbase.io.crypto.Cipher;
import org.apache.hadoop.hbase.io.crypto.Encryption;
import org.apache.hadoop.hbase.io.crypto.Encryptor;
import org.apache.hadoop.hbase.io.util.LRUDictionary;
import org.apache.hadoop.hbase.security.EncryptionUtil;
import org.apache.hadoop.hbase.security.User;
import org.apache.hadoop.hbase.util.CommonFSUtils;
import org.apache.hadoop.hbase.util.CommonFSUtils.StreamLacksCapabilityException;
import org.apache.hadoop.hbase.util.EncryptionTest;
import org.apache.yetus.audience.InterfaceAudience;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.apache.hbase.thirdparty.com.google.protobuf.UnsafeByteOperations;
import org.apache.hadoop.hbase.shaded.protobuf.generated.WALProtos.WALHeader;
import org.apache.hadoop.hbase.shaded.protobuf.generated.WALProtos.WALTrailer;
/**
* Base class for Protobuf log writer.
*/
@InterfaceAudience.LimitedPrivate(HBaseInterfaceAudience.CONFIG)
public abstract class AbstractProtobufLogWriter {
private static final Logger LOG = LoggerFactory.getLogger(AbstractProtobufLogWriter.class);
protected CompressionContext compressionContext;
protected Configuration conf;
protected Codec.Encoder cellEncoder;
protected WALCellCodec.ByteStringCompressor compressor;
protected boolean trailerWritten;
protected WALTrailer trailer;
// maximum size of the wal Trailer in bytes. If a user writes/reads a trailer with size larger
// than this size, it is written/read respectively, with a WARN message in the log.
protected int trailerWarnSize;
protected AtomicLong length = new AtomicLong();
private WALCellCodec getCodec(Configuration conf, CompressionContext compressionContext)
throws IOException {
return WALCellCodec.create(conf, null, compressionContext);
}
private WALHeader buildWALHeader0(Configuration conf, WALHeader.Builder builder) {
if (!builder.hasWriterClsName()) {
builder.setWriterClsName(getWriterClassName());
}
if (!builder.hasCellCodecClsName()) {
builder.setCellCodecClsName(
WALCellCodec.getWALCellCodecClass(conf).getName());
}
return builder.build();
}
protected WALHeader buildWALHeader(Configuration conf, WALHeader.Builder builder)
throws IOException {
return buildWALHeader0(conf, builder);
}
// should be called in sub classes's buildWALHeader method to build WALHeader for secure
// environment. Do not forget to override the setEncryptor method as it will be called in this
// method to init your encryptor.
protected final WALHeader buildSecureWALHeader(Configuration conf, WALHeader.Builder builder)
throws IOException {
builder.setWriterClsName(getWriterClassName());
if (conf.getBoolean(HConstants.ENABLE_WAL_ENCRYPTION, false)) {
EncryptionTest.testKeyProvider(conf);
EncryptionTest.testCipherProvider(conf);
// Get an instance of our cipher
final String cipherName =
conf.get(HConstants.CRYPTO_WAL_ALGORITHM_CONF_KEY, HConstants.CIPHER_AES);
Cipher cipher = Encryption.getCipher(conf, cipherName);
if (cipher == null) {
throw new RuntimeException("Cipher '" + cipherName + "' is not available");
}
// Generate a random encryption key for this WAL
Key key = cipher.getRandomKey();
builder.setEncryptionKey(UnsafeByteOperations.unsafeWrap(EncryptionUtil.wrapKey(conf,
conf.get(HConstants.CRYPTO_WAL_KEY_NAME_CONF_KEY,
conf.get(HConstants.CRYPTO_MASTERKEY_NAME_CONF_KEY,
User.getCurrent().getShortName())),
key)));
// Set up the encryptor
Encryptor encryptor = cipher.getEncryptor();
encryptor.setKey(key);
setEncryptor(encryptor);
if (LOG.isTraceEnabled()) {
LOG.trace("Initialized secure protobuf WAL: cipher=" + cipher.getName());
}
}
builder.setCellCodecClsName(SecureWALCellCodec.class.getName());
return buildWALHeader0(conf, builder);
}
// override this if you need a encryptor
protected void setEncryptor(Encryptor encryptor) {
}
protected String getWriterClassName() {
return getClass().getSimpleName();
}
private boolean initializeCompressionContext(Configuration conf, Path path) throws IOException {
boolean doCompress = conf.getBoolean(HConstants.ENABLE_WAL_COMPRESSION, false);
if (doCompress) {
try {
this.compressionContext =
new CompressionContext(LRUDictionary.class, CommonFSUtils.isRecoveredEdits(path),
conf.getBoolean(CompressionContext.ENABLE_WAL_TAGS_COMPRESSION, true));
} catch (Exception e) {
throw new IOException("Failed to initiate CompressionContext", e);
}
}
return doCompress;
}
public void init(FileSystem fs, Path path, Configuration conf, boolean overwritable,
long blocksize) throws IOException, StreamLacksCapabilityException {
try {
this.conf = conf;
boolean doCompress = initializeCompressionContext(conf, path);
this.trailerWarnSize = conf.getInt(WAL_TRAILER_WARN_SIZE, DEFAULT_WAL_TRAILER_WARN_SIZE);
int bufferSize = CommonFSUtils.getDefaultBufferSize(fs);
short replication = (short) conf.getInt("hbase.regionserver.hlog.replication",
CommonFSUtils.getDefaultReplication(fs, path));
initOutput(fs, path, overwritable, bufferSize, replication, blocksize);
boolean doTagCompress =
doCompress && conf.getBoolean(CompressionContext.ENABLE_WAL_TAGS_COMPRESSION, true);
length.set(writeMagicAndWALHeader(ProtobufLogReader.PB_WAL_MAGIC, buildWALHeader(conf,
WALHeader.newBuilder().setHasCompression(doCompress).setHasTagCompression(doTagCompress))));
initAfterHeader(doCompress);
// instantiate trailer to default value.
trailer = WALTrailer.newBuilder().build();
if (LOG.isTraceEnabled()) {
LOG.trace("Initialized protobuf WAL=" + path + ", compression=" + doCompress);
}
} catch (Exception e) {
LOG.warn("Init output failed, path={}", path, e);
closeOutput();
throw e;
}
}
private void initAfterHeader0(boolean doCompress) throws IOException {
WALCellCodec codec = getCodec(conf, this.compressionContext);
this.cellEncoder = codec.getEncoder(getOutputStreamForCellEncoder());
if (doCompress) {
this.compressor = codec.getByteStringCompressor();
} else {
this.compressor = WALCellCodec.getNoneCompressor();
}
}
protected void initAfterHeader(boolean doCompress) throws IOException {
initAfterHeader0(doCompress);
}
// should be called in sub classes's initAfterHeader method to init SecureWALCellCodec.
protected final void secureInitAfterHeader(boolean doCompress, Encryptor encryptor)
throws IOException {
if (conf.getBoolean(HConstants.ENABLE_WAL_ENCRYPTION, false) && encryptor != null) {
WALCellCodec codec = SecureWALCellCodec.getCodec(this.conf, encryptor);
this.cellEncoder = codec.getEncoder(getOutputStreamForCellEncoder());
// We do not support compression
this.compressionContext = null;
this.compressor = WALCellCodec.getNoneCompressor();
} else {
initAfterHeader0(doCompress);
}
}
void setWALTrailer(WALTrailer walTrailer) {
this.trailer = walTrailer;
}
public long getLength() {
return length.get();
}
private WALTrailer buildWALTrailer(WALTrailer.Builder builder) {
return builder.build();
}
protected void writeWALTrailer() {
try {
int trailerSize = 0;
if (this.trailer == null) {
// use default trailer.
LOG.warn("WALTrailer is null. Continuing with default.");
this.trailer = buildWALTrailer(WALTrailer.newBuilder());
trailerSize = this.trailer.getSerializedSize();
} else if ((trailerSize = this.trailer.getSerializedSize()) > this.trailerWarnSize) {
// continue writing after warning the user.
LOG.warn("Please investigate WALTrailer usage. Trailer size > maximum size : " + trailerSize
+ " > " + this.trailerWarnSize);
}
length.set(writeWALTrailerAndMagic(trailer, ProtobufLogReader.PB_WAL_COMPLETE_MAGIC));
this.trailerWritten = true;
} catch (IOException ioe) {
LOG.warn("Failed to write trailer, non-fatal, continuing...", ioe);
}
}
protected abstract void initOutput(FileSystem fs, Path path, boolean overwritable, int bufferSize,
short replication, long blockSize) throws IOException, StreamLacksCapabilityException;
/**
* simply close the output, do not need to write trailer like the Writer.close
*/
protected abstract void closeOutput();
/**
* return the file length after written.
*/
protected abstract long writeMagicAndWALHeader(byte[] magic, WALHeader header) throws IOException;
protected abstract long writeWALTrailerAndMagic(WALTrailer trailer, byte[] magic)
throws IOException;
protected abstract OutputStream getOutputStreamForCellEncoder();
}