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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.io.hfile;
import java.io.DataOutput;
import java.io.DataOutputStream;
import java.io.IOException;
import java.net.InetSocketAddress;
import java.nio.ByteBuffer;
import java.util.ArrayList;
import java.util.List;
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.fs.permission.FsPermission;
import org.apache.hadoop.hbase.ByteBufferExtendedCell;
import org.apache.hadoop.hbase.Cell;
import org.apache.hadoop.hbase.CellComparator;
import org.apache.hadoop.hbase.CellUtil;
import org.apache.hadoop.hbase.HConstants;
import org.apache.hadoop.hbase.KeyValueUtil;
import org.apache.hadoop.hbase.MetaCellComparator;
import org.apache.hadoop.hbase.PrivateCellUtil;
import org.apache.hadoop.hbase.io.compress.Compression;
import org.apache.hadoop.hbase.io.crypto.Encryption;
import org.apache.hadoop.hbase.io.encoding.DataBlockEncoding;
import org.apache.hadoop.hbase.io.hfile.HFileBlock.BlockWritable;
import org.apache.hadoop.hbase.security.EncryptionUtil;
import org.apache.hadoop.hbase.security.User;
import org.apache.hadoop.hbase.util.BloomFilterWriter;
import org.apache.hadoop.hbase.util.ByteBufferUtils;
import org.apache.hadoop.hbase.util.Bytes;
import org.apache.hadoop.hbase.util.CommonFSUtils;
import org.apache.hadoop.hbase.util.FSUtils;
import org.apache.hadoop.io.Writable;
import org.apache.yetus.audience.InterfaceAudience;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.apache.hbase.thirdparty.com.google.common.annotations.VisibleForTesting;
/**
* Common functionality needed by all versions of {@link HFile} writers.
*/
@InterfaceAudience.Private
public class HFileWriterImpl implements HFile.Writer {
private static final Logger LOG = LoggerFactory.getLogger(HFileWriterImpl.class);
private static final long UNSET = -1;
/** if this feature is enabled, preCalculate encoded data size before real encoding happens*/
public static final String UNIFIED_ENCODED_BLOCKSIZE_RATIO =
"hbase.writer.unified.encoded.blocksize.ratio";
/** Block size limit after encoding, used to unify encoded block Cache entry size*/
private final int encodedBlockSizeLimit;
/** The Cell previously appended. Becomes the last cell in the file.*/
protected Cell lastCell = null;
/** FileSystem stream to write into. */
protected FSDataOutputStream outputStream;
/** True if we opened the outputStream (and so will close it). */
protected final boolean closeOutputStream;
/** A "file info" block: a key-value map of file-wide metadata. */
protected HFileInfo fileInfo = new HFileInfo();
/** Total # of key/value entries, i.e. how many times add() was called. */
protected long entryCount = 0;
/** Used for calculating the average key length. */
protected long totalKeyLength = 0;
/** Used for calculating the average value length. */
protected long totalValueLength = 0;
/** Total uncompressed bytes, maybe calculate a compression ratio later. */
protected long totalUncompressedBytes = 0;
/** Meta block names. */
protected List metaNames = new ArrayList<>();
/** {@link Writable}s representing meta block data. */
protected List metaData = new ArrayList<>();
/**
* First cell in a block.
* This reference should be short-lived since we write hfiles in a burst.
*/
protected Cell firstCellInBlock = null;
/** May be null if we were passed a stream. */
protected final Path path;
/** Cache configuration for caching data on write. */
protected final CacheConfig cacheConf;
/**
* Name for this object used when logging or in toString. Is either
* the result of a toString on stream or else name of passed file Path.
*/
protected final String name;
/**
* The data block encoding which will be used.
* {@link NoOpDataBlockEncoder#INSTANCE} if there is no encoding.
*/
protected final HFileDataBlockEncoder blockEncoder;
protected final HFileContext hFileContext;
private int maxTagsLength = 0;
/** KeyValue version in FileInfo */
public static final byte [] KEY_VALUE_VERSION = Bytes.toBytes("KEY_VALUE_VERSION");
/** Version for KeyValue which includes memstore timestamp */
public static final int KEY_VALUE_VER_WITH_MEMSTORE = 1;
/** Inline block writers for multi-level block index and compound Blooms. */
private List inlineBlockWriters = new ArrayList<>();
/** block writer */
protected HFileBlock.Writer blockWriter;
private HFileBlockIndex.BlockIndexWriter dataBlockIndexWriter;
private HFileBlockIndex.BlockIndexWriter metaBlockIndexWriter;
/** The offset of the first data block or -1 if the file is empty. */
private long firstDataBlockOffset = UNSET;
/** The offset of the last data block or 0 if the file is empty. */
protected long lastDataBlockOffset = UNSET;
/**
* The last(stop) Cell of the previous data block.
* This reference should be short-lived since we write hfiles in a burst.
*/
private Cell lastCellOfPreviousBlock = null;
/** Additional data items to be written to the "load-on-open" section. */
private List additionalLoadOnOpenData = new ArrayList<>();
protected long maxMemstoreTS = 0;
public HFileWriterImpl(final Configuration conf, CacheConfig cacheConf, Path path,
FSDataOutputStream outputStream, HFileContext fileContext) {
this.outputStream = outputStream;
this.path = path;
this.name = path != null ? path.getName() : outputStream.toString();
this.hFileContext = fileContext;
DataBlockEncoding encoding = hFileContext.getDataBlockEncoding();
if (encoding != DataBlockEncoding.NONE) {
this.blockEncoder = new HFileDataBlockEncoderImpl(encoding);
} else {
this.blockEncoder = NoOpDataBlockEncoder.INSTANCE;
}
closeOutputStream = path != null;
this.cacheConf = cacheConf;
float encodeBlockSizeRatio = conf.getFloat(UNIFIED_ENCODED_BLOCKSIZE_RATIO, 1f);
this.encodedBlockSizeLimit = (int)(hFileContext.getBlocksize() * encodeBlockSizeRatio);
finishInit(conf);
if (LOG.isTraceEnabled()) {
LOG.trace("Writer" + (path != null ? " for " + path : "") +
" initialized with cacheConf: " + cacheConf +
" fileContext: " + fileContext);
}
}
/**
* Add to the file info. All added key/value pairs can be obtained using
* {@link HFile.Reader#getHFileInfo()}.
*
* @param k Key
* @param v Value
* @throws IOException in case the key or the value are invalid
*/
@Override
public void appendFileInfo(final byte[] k, final byte[] v)
throws IOException {
fileInfo.append(k, v, true);
}
/**
* Sets the file info offset in the trailer, finishes up populating fields in
* the file info, and writes the file info into the given data output. The
* reason the data output is not always {@link #outputStream} is that we store
* file info as a block in version 2.
*
* @param trailer fixed file trailer
* @param out the data output to write the file info to
*/
protected final void writeFileInfo(FixedFileTrailer trailer, DataOutputStream out)
throws IOException {
trailer.setFileInfoOffset(outputStream.getPos());
finishFileInfo();
long startTime = System.currentTimeMillis();
fileInfo.write(out);
HFile.updateWriteLatency(System.currentTimeMillis() - startTime);
}
/**
* Checks that the given Cell's key does not violate the key order.
*
* @param cell Cell whose key to check.
* @return true if the key is duplicate
* @throws IOException if the key or the key order is wrong
*/
protected boolean checkKey(final Cell cell) throws IOException {
boolean isDuplicateKey = false;
if (cell == null) {
throw new IOException("Key cannot be null or empty");
}
if (lastCell != null) {
int keyComp = PrivateCellUtil.compareKeyIgnoresMvcc(this.hFileContext.getCellComparator(),
lastCell, cell);
if (keyComp > 0) {
String message = getLexicalErrorMessage(cell);
throw new IOException(message);
} else if (keyComp == 0) {
isDuplicateKey = true;
}
}
return isDuplicateKey;
}
private String getLexicalErrorMessage(Cell cell) {
StringBuilder sb = new StringBuilder();
sb.append("Added a key not lexically larger than previous. Current cell = ");
sb.append(cell);
sb.append(", lastCell = ");
sb.append(lastCell);
//file context includes HFile path and optionally table and CF of file being written
sb.append("fileContext=");
sb.append(hFileContext);
return sb.toString();
}
/** Checks the given value for validity. */
protected void checkValue(final byte[] value, final int offset,
final int length) throws IOException {
if (value == null) {
throw new IOException("Value cannot be null");
}
}
/**
* @return Path or null if we were passed a stream rather than a Path.
*/
@Override
public Path getPath() {
return path;
}
@Override
public String toString() {
return "writer=" + (path != null ? path.toString() : null) + ", name="
+ name + ", compression=" + hFileContext.getCompression().getName();
}
public static Compression.Algorithm compressionByName(String algoName) {
if (algoName == null) {
return HFile.DEFAULT_COMPRESSION_ALGORITHM;
}
return Compression.getCompressionAlgorithmByName(algoName);
}
/** A helper method to create HFile output streams in constructors */
protected static FSDataOutputStream createOutputStream(Configuration conf,
FileSystem fs, Path path, InetSocketAddress[] favoredNodes) throws IOException {
FsPermission perms = CommonFSUtils.getFilePermissions(fs, conf,
HConstants.DATA_FILE_UMASK_KEY);
return FSUtils.create(conf, fs, path, perms, favoredNodes);
}
/** Additional initialization steps */
protected void finishInit(final Configuration conf) {
if (blockWriter != null) {
throw new IllegalStateException("finishInit called twice");
}
blockWriter = new HFileBlock.Writer(blockEncoder, hFileContext,
cacheConf.getByteBuffAllocator());
// Data block index writer
boolean cacheIndexesOnWrite = cacheConf.shouldCacheIndexesOnWrite();
dataBlockIndexWriter = new HFileBlockIndex.BlockIndexWriter(blockWriter,
cacheIndexesOnWrite ? cacheConf : null,
cacheIndexesOnWrite ? name : null);
dataBlockIndexWriter.setMaxChunkSize(
HFileBlockIndex.getMaxChunkSize(conf));
dataBlockIndexWriter.setMinIndexNumEntries(
HFileBlockIndex.getMinIndexNumEntries(conf));
inlineBlockWriters.add(dataBlockIndexWriter);
// Meta data block index writer
metaBlockIndexWriter = new HFileBlockIndex.BlockIndexWriter();
LOG.trace("Initialized with {}", cacheConf);
}
/**
* At a block boundary, write all the inline blocks and opens new block.
*/
protected void checkBlockBoundary() throws IOException {
// For encoder like prefixTree, encoded size is not available, so we have to compare both
// encoded size and unencoded size to blocksize limit.
if (blockWriter.encodedBlockSizeWritten() >= encodedBlockSizeLimit
|| blockWriter.blockSizeWritten() >= hFileContext.getBlocksize()) {
finishBlock();
writeInlineBlocks(false);
newBlock();
}
}
/** Clean up the data block that is currently being written.*/
private void finishBlock() throws IOException {
if (!blockWriter.isWriting() || blockWriter.blockSizeWritten() == 0) {
return;
}
// Update the first data block offset if UNSET; used scanning.
if (firstDataBlockOffset == UNSET) {
firstDataBlockOffset = outputStream.getPos();
}
// Update the last data block offset each time through here.
lastDataBlockOffset = outputStream.getPos();
blockWriter.writeHeaderAndData(outputStream);
int onDiskSize = blockWriter.getOnDiskSizeWithHeader();
Cell indexEntry =
getMidpoint(this.hFileContext.getCellComparator(), lastCellOfPreviousBlock, firstCellInBlock);
dataBlockIndexWriter.addEntry(PrivateCellUtil.getCellKeySerializedAsKeyValueKey(indexEntry),
lastDataBlockOffset, onDiskSize);
totalUncompressedBytes += blockWriter.getUncompressedSizeWithHeader();
if (cacheConf.shouldCacheDataOnWrite()) {
doCacheOnWrite(lastDataBlockOffset);
}
}
/**
* Try to return a Cell that falls between left and
* right but that is shorter; i.e. takes up less space. This
* trick is used building HFile block index. Its an optimization. It does not
* always work. In this case we'll just return the right cell.
* @return A cell that sorts between left and right.
*/
public static Cell getMidpoint(final CellComparator comparator, final Cell left,
final Cell right) {
// TODO: Redo so only a single pass over the arrays rather than one to
// compare and then a second composing midpoint.
if (right == null) {
throw new IllegalArgumentException("right cell can not be null");
}
if (left == null) {
return right;
}
// If Cells from meta table, don't mess around. meta table Cells have schema
// (table,startrow,hash) so can't be treated as plain byte arrays. Just skip
// out without trying to do this optimization.
if (comparator instanceof MetaCellComparator) {
return right;
}
int diff = comparator.compareRows(left, right);
if (diff > 0) {
throw new IllegalArgumentException("Left row sorts after right row; left="
+ CellUtil.getCellKeyAsString(left) + ", right=" + CellUtil.getCellKeyAsString(right));
}
byte[] midRow;
boolean bufferBacked = left instanceof ByteBufferExtendedCell
&& right instanceof ByteBufferExtendedCell;
if (diff < 0) {
// Left row is < right row.
if (bufferBacked) {
midRow = getMinimumMidpointArray(((ByteBufferExtendedCell) left).getRowByteBuffer(),
((ByteBufferExtendedCell) left).getRowPosition(), left.getRowLength(),
((ByteBufferExtendedCell) right).getRowByteBuffer(),
((ByteBufferExtendedCell) right).getRowPosition(), right.getRowLength());
} else {
midRow = getMinimumMidpointArray(left.getRowArray(), left.getRowOffset(),
left.getRowLength(), right.getRowArray(), right.getRowOffset(), right.getRowLength());
}
// If midRow is null, just return 'right'. Can't do optimization.
if (midRow == null) {
return right;
}
return PrivateCellUtil.createFirstOnRow(midRow);
}
// Rows are same. Compare on families.
diff = comparator.compareFamilies(left, right);
if (diff > 0) {
throw new IllegalArgumentException("Left family sorts after right family; left="
+ CellUtil.getCellKeyAsString(left) + ", right=" + CellUtil.getCellKeyAsString(right));
}
if (diff < 0) {
if (bufferBacked) {
midRow = getMinimumMidpointArray(((ByteBufferExtendedCell) left).getFamilyByteBuffer(),
((ByteBufferExtendedCell) left).getFamilyPosition(), left.getFamilyLength(),
((ByteBufferExtendedCell) right).getFamilyByteBuffer(),
((ByteBufferExtendedCell) right).getFamilyPosition(), right.getFamilyLength());
} else {
midRow = getMinimumMidpointArray(left.getFamilyArray(), left.getFamilyOffset(),
left.getFamilyLength(), right.getFamilyArray(), right.getFamilyOffset(),
right.getFamilyLength());
}
// If midRow is null, just return 'right'. Can't do optimization.
if (midRow == null) {
return right;
}
// Return new Cell where we use right row and then a mid sort family.
return PrivateCellUtil.createFirstOnRowFamily(right, midRow, 0, midRow.length);
}
// Families are same. Compare on qualifiers.
diff = comparator.compareQualifiers(left, right);
if (diff > 0) {
throw new IllegalArgumentException("Left qualifier sorts after right qualifier; left="
+ CellUtil.getCellKeyAsString(left) + ", right=" + CellUtil.getCellKeyAsString(right));
}
if (diff < 0) {
if (bufferBacked) {
midRow = getMinimumMidpointArray(((ByteBufferExtendedCell) left).getQualifierByteBuffer(),
((ByteBufferExtendedCell) left).getQualifierPosition(), left.getQualifierLength(),
((ByteBufferExtendedCell) right).getQualifierByteBuffer(),
((ByteBufferExtendedCell) right).getQualifierPosition(), right.getQualifierLength());
} else {
midRow = getMinimumMidpointArray(left.getQualifierArray(), left.getQualifierOffset(),
left.getQualifierLength(), right.getQualifierArray(), right.getQualifierOffset(),
right.getQualifierLength());
}
// If midRow is null, just return 'right'. Can't do optimization.
if (midRow == null) {
return right;
}
// Return new Cell where we use right row and family and then a mid sort qualifier.
return PrivateCellUtil.createFirstOnRowCol(right, midRow, 0, midRow.length);
}
// No opportunity for optimization. Just return right key.
return right;
}
/**
* @return Return a new array that is between left and right and minimally
* sized else just return null as indicator that we could not create a
* mid point.
*/
private static byte[] getMinimumMidpointArray(final byte[] leftArray, final int leftOffset,
final int leftLength, final byte[] rightArray, final int rightOffset, final int rightLength) {
// rows are different
int minLength = leftLength < rightLength ? leftLength : rightLength;
int diffIdx = 0;
while (diffIdx < minLength
&& leftArray[leftOffset + diffIdx] == rightArray[rightOffset + diffIdx]) {
diffIdx++;
}
byte[] minimumMidpointArray = null;
if (diffIdx >= minLength) {
// leftKey's row is prefix of rightKey's.
minimumMidpointArray = new byte[diffIdx + 1];
System.arraycopy(rightArray, rightOffset, minimumMidpointArray, 0, diffIdx + 1);
} else {
int diffByte = leftArray[leftOffset + diffIdx];
if ((0xff & diffByte) < 0xff && (diffByte + 1) < (rightArray[rightOffset + diffIdx] & 0xff)) {
minimumMidpointArray = new byte[diffIdx + 1];
System.arraycopy(leftArray, leftOffset, minimumMidpointArray, 0, diffIdx);
minimumMidpointArray[diffIdx] = (byte) (diffByte + 1);
} else {
minimumMidpointArray = new byte[diffIdx + 1];
System.arraycopy(rightArray, rightOffset, minimumMidpointArray, 0, diffIdx + 1);
}
}
return minimumMidpointArray;
}
private static byte[] getMinimumMidpointArray(ByteBuffer left, int leftOffset, int leftLength,
ByteBuffer right, int rightOffset, int rightLength) {
// rows are different
int minLength = leftLength < rightLength ? leftLength : rightLength;
int diffIdx = 0;
while (diffIdx < minLength && ByteBufferUtils.toByte(left,
leftOffset + diffIdx) == ByteBufferUtils.toByte(right, rightOffset + diffIdx)) {
diffIdx++;
}
byte[] minMidpoint = null;
if (diffIdx >= minLength) {
// leftKey's row is prefix of rightKey's.
minMidpoint = new byte[diffIdx + 1];
ByteBufferUtils.copyFromBufferToArray(minMidpoint, right, rightOffset, 0, diffIdx + 1);
} else {
int diffByte = ByteBufferUtils.toByte(left, leftOffset + diffIdx);
if ((0xff & diffByte) < 0xff
&& (diffByte + 1) < (ByteBufferUtils.toByte(right, rightOffset + diffIdx) & 0xff)) {
minMidpoint = new byte[diffIdx + 1];
ByteBufferUtils.copyFromBufferToArray(minMidpoint, left, leftOffset, 0, diffIdx);
minMidpoint[diffIdx] = (byte) (diffByte + 1);
} else {
minMidpoint = new byte[diffIdx + 1];
ByteBufferUtils.copyFromBufferToArray(minMidpoint, right, rightOffset, 0, diffIdx + 1);
}
}
return minMidpoint;
}
/** Gives inline block writers an opportunity to contribute blocks. */
private void writeInlineBlocks(boolean closing) throws IOException {
for (InlineBlockWriter ibw : inlineBlockWriters) {
while (ibw.shouldWriteBlock(closing)) {
long offset = outputStream.getPos();
boolean cacheThisBlock = ibw.getCacheOnWrite();
ibw.writeInlineBlock(blockWriter.startWriting(
ibw.getInlineBlockType()));
blockWriter.writeHeaderAndData(outputStream);
ibw.blockWritten(offset, blockWriter.getOnDiskSizeWithHeader(),
blockWriter.getUncompressedSizeWithoutHeader());
totalUncompressedBytes += blockWriter.getUncompressedSizeWithHeader();
if (cacheThisBlock) {
doCacheOnWrite(offset);
}
}
}
}
/**
* Caches the last written HFile block.
* @param offset the offset of the block we want to cache. Used to determine
* the cache key.
*/
private void doCacheOnWrite(long offset) {
cacheConf.getBlockCache().ifPresent(cache -> {
HFileBlock cacheFormatBlock = blockWriter.getBlockForCaching(cacheConf);
try {
cache.cacheBlock(new BlockCacheKey(name, offset, true, cacheFormatBlock.getBlockType()),
cacheFormatBlock);
} finally {
// refCnt will auto increase when block add to Cache, see RAMCache#putIfAbsent
cacheFormatBlock.release();
}
});
}
/**
* Ready a new block for writing.
*/
protected void newBlock() throws IOException {
// This is where the next block begins.
blockWriter.startWriting(BlockType.DATA);
firstCellInBlock = null;
if (lastCell != null) {
lastCellOfPreviousBlock = lastCell;
}
}
/**
* Add a meta block to the end of the file. Call before close(). Metadata
* blocks are expensive. Fill one with a bunch of serialized data rather than
* do a metadata block per metadata instance. If metadata is small, consider
* adding to file info using {@link #appendFileInfo(byte[], byte[])}
*
* @param metaBlockName
* name of the block
* @param content
* will call readFields to get data later (DO NOT REUSE)
*/
@Override
public void appendMetaBlock(String metaBlockName, Writable content) {
byte[] key = Bytes.toBytes(metaBlockName);
int i;
for (i = 0; i < metaNames.size(); ++i) {
// stop when the current key is greater than our own
byte[] cur = metaNames.get(i);
if (Bytes.BYTES_RAWCOMPARATOR.compare(cur, 0, cur.length, key, 0,
key.length) > 0) {
break;
}
}
metaNames.add(i, key);
metaData.add(i, content);
}
@Override
public void close() throws IOException {
if (outputStream == null) {
return;
}
// Save data block encoder metadata in the file info.
blockEncoder.saveMetadata(this);
// Write out the end of the data blocks, then write meta data blocks.
// followed by fileinfo, data block index and meta block index.
finishBlock();
writeInlineBlocks(true);
FixedFileTrailer trailer = new FixedFileTrailer(getMajorVersion(), getMinorVersion());
// Write out the metadata blocks if any.
if (!metaNames.isEmpty()) {
for (int i = 0; i < metaNames.size(); ++i) {
// store the beginning offset
long offset = outputStream.getPos();
// write the metadata content
DataOutputStream dos = blockWriter.startWriting(BlockType.META);
metaData.get(i).write(dos);
blockWriter.writeHeaderAndData(outputStream);
totalUncompressedBytes += blockWriter.getUncompressedSizeWithHeader();
// Add the new meta block to the meta index.
metaBlockIndexWriter.addEntry(metaNames.get(i), offset,
blockWriter.getOnDiskSizeWithHeader());
}
}
// Load-on-open section.
// Data block index.
//
// In version 2, this section of the file starts with the root level data
// block index. We call a function that writes intermediate-level blocks
// first, then root level, and returns the offset of the root level block
// index.
long rootIndexOffset = dataBlockIndexWriter.writeIndexBlocks(outputStream);
trailer.setLoadOnOpenOffset(rootIndexOffset);
// Meta block index.
metaBlockIndexWriter.writeSingleLevelIndex(blockWriter.startWriting(
BlockType.ROOT_INDEX), "meta");
blockWriter.writeHeaderAndData(outputStream);
totalUncompressedBytes += blockWriter.getUncompressedSizeWithHeader();
if (this.hFileContext.isIncludesMvcc()) {
appendFileInfo(MAX_MEMSTORE_TS_KEY, Bytes.toBytes(maxMemstoreTS));
appendFileInfo(KEY_VALUE_VERSION, Bytes.toBytes(KEY_VALUE_VER_WITH_MEMSTORE));
}
// File info
writeFileInfo(trailer, blockWriter.startWriting(BlockType.FILE_INFO));
blockWriter.writeHeaderAndData(outputStream);
totalUncompressedBytes += blockWriter.getUncompressedSizeWithHeader();
// Load-on-open data supplied by higher levels, e.g. Bloom filters.
for (BlockWritable w : additionalLoadOnOpenData){
blockWriter.writeBlock(w, outputStream);
totalUncompressedBytes += blockWriter.getUncompressedSizeWithHeader();
}
// Now finish off the trailer.
trailer.setNumDataIndexLevels(dataBlockIndexWriter.getNumLevels());
trailer.setUncompressedDataIndexSize(
dataBlockIndexWriter.getTotalUncompressedSize());
trailer.setFirstDataBlockOffset(firstDataBlockOffset);
trailer.setLastDataBlockOffset(lastDataBlockOffset);
trailer.setComparatorClass(this.hFileContext.getCellComparator().getClass());
trailer.setDataIndexCount(dataBlockIndexWriter.getNumRootEntries());
finishClose(trailer);
blockWriter.release();
}
@Override
public void addInlineBlockWriter(InlineBlockWriter ibw) {
inlineBlockWriters.add(ibw);
}
@Override
public void addGeneralBloomFilter(final BloomFilterWriter bfw) {
this.addBloomFilter(bfw, BlockType.GENERAL_BLOOM_META);
}
@Override
public void addDeleteFamilyBloomFilter(final BloomFilterWriter bfw) {
this.addBloomFilter(bfw, BlockType.DELETE_FAMILY_BLOOM_META);
}
private void addBloomFilter(final BloomFilterWriter bfw,
final BlockType blockType) {
if (bfw.getKeyCount() <= 0) {
return;
}
if (blockType != BlockType.GENERAL_BLOOM_META &&
blockType != BlockType.DELETE_FAMILY_BLOOM_META) {
throw new RuntimeException("Block Type: " + blockType.toString() +
"is not supported");
}
additionalLoadOnOpenData.add(new BlockWritable() {
@Override
public BlockType getBlockType() {
return blockType;
}
@Override
public void writeToBlock(DataOutput out) throws IOException {
bfw.getMetaWriter().write(out);
Writable dataWriter = bfw.getDataWriter();
if (dataWriter != null) {
dataWriter.write(out);
}
}
});
}
@Override
public HFileContext getFileContext() {
return hFileContext;
}
/**
* Add key/value to file. Keys must be added in an order that agrees with the
* Comparator passed on construction.
*
* @param cell
* Cell to add. Cannot be empty nor null.
*/
@Override
public void append(final Cell cell) throws IOException {
// checkKey uses comparator to check we are writing in order.
boolean dupKey = checkKey(cell);
if (!dupKey) {
checkBlockBoundary();
}
if (!blockWriter.isWriting()) {
newBlock();
}
blockWriter.write(cell);
totalKeyLength += PrivateCellUtil.estimatedSerializedSizeOfKey(cell);
totalValueLength += cell.getValueLength();
// Are we the first key in this block?
if (firstCellInBlock == null) {
// If cell is big, block will be closed and this firstCellInBlock reference will only last
// a short while.
firstCellInBlock = cell;
}
// TODO: What if cell is 10MB and we write infrequently? We hold on to cell here indefinitely?
lastCell = cell;
entryCount++;
this.maxMemstoreTS = Math.max(this.maxMemstoreTS, cell.getSequenceId());
int tagsLength = cell.getTagsLength();
if (tagsLength > this.maxTagsLength) {
this.maxTagsLength = tagsLength;
}
}
@Override
public void beforeShipped() throws IOException {
this.blockWriter.beforeShipped();
// Add clone methods for every cell
if (this.lastCell != null) {
this.lastCell = KeyValueUtil.toNewKeyCell(this.lastCell);
}
if (this.firstCellInBlock != null) {
this.firstCellInBlock = KeyValueUtil.toNewKeyCell(this.firstCellInBlock);
}
if (this.lastCellOfPreviousBlock != null) {
this.lastCellOfPreviousBlock = KeyValueUtil.toNewKeyCell(this.lastCellOfPreviousBlock);
}
}
@VisibleForTesting
public Cell getLastCell() {
return lastCell;
}
protected void finishFileInfo() throws IOException {
if (lastCell != null) {
// Make a copy. The copy is stuffed into our fileinfo map. Needs a clean
// byte buffer. Won't take a tuple.
byte [] lastKey = PrivateCellUtil.getCellKeySerializedAsKeyValueKey(this.lastCell);
fileInfo.append(HFileInfo.LASTKEY, lastKey, false);
}
// Average key length.
int avgKeyLen =
entryCount == 0 ? 0 : (int) (totalKeyLength / entryCount);
fileInfo.append(HFileInfo.AVG_KEY_LEN, Bytes.toBytes(avgKeyLen), false);
fileInfo.append(HFileInfo.CREATE_TIME_TS, Bytes.toBytes(hFileContext.getFileCreateTime()),
false);
// Average value length.
int avgValueLen =
entryCount == 0 ? 0 : (int) (totalValueLength / entryCount);
fileInfo.append(HFileInfo.AVG_VALUE_LEN, Bytes.toBytes(avgValueLen), false);
if (hFileContext.isIncludesTags()) {
// When tags are not being written in this file, MAX_TAGS_LEN is excluded
// from the FileInfo
fileInfo.append(HFileInfo.MAX_TAGS_LEN, Bytes.toBytes(this.maxTagsLength), false);
boolean tagsCompressed = (hFileContext.getDataBlockEncoding() != DataBlockEncoding.NONE)
&& hFileContext.isCompressTags();
fileInfo.append(HFileInfo.TAGS_COMPRESSED, Bytes.toBytes(tagsCompressed), false);
}
}
protected int getMajorVersion() {
return 3;
}
protected int getMinorVersion() {
return HFileReaderImpl.MAX_MINOR_VERSION;
}
protected void finishClose(FixedFileTrailer trailer) throws IOException {
// Write out encryption metadata before finalizing if we have a valid crypto context
Encryption.Context cryptoContext = hFileContext.getEncryptionContext();
if (cryptoContext != Encryption.Context.NONE) {
// Wrap the context's key and write it as the encryption metadata, the wrapper includes
// all information needed for decryption
trailer.setEncryptionKey(EncryptionUtil.wrapKey(cryptoContext.getConf(),
cryptoContext.getConf().get(HConstants.CRYPTO_MASTERKEY_NAME_CONF_KEY,
User.getCurrent().getShortName()),
cryptoContext.getKey()));
}
// Now we can finish the close
trailer.setMetaIndexCount(metaNames.size());
trailer.setTotalUncompressedBytes(totalUncompressedBytes+ trailer.getTrailerSize());
trailer.setEntryCount(entryCount);
trailer.setCompressionCodec(hFileContext.getCompression());
long startTime = System.currentTimeMillis();
trailer.serialize(outputStream);
HFile.updateWriteLatency(System.currentTimeMillis() - startTime);
if (closeOutputStream) {
outputStream.close();
outputStream = null;
}
}
}