/** Clean up the current block */
private void finishBlock() throws IOException {
if (!fsBlockWriter.isWriting() || fsBlockWriter.blockSizeWritten() == 0) return;
long startTimeNs = System.nanoTime();
// Update the first data block offset for scanning.
if (firstDataBlockOffset == -1) {
firstDataBlockOffset = outputStream.getPos();
}
// Update the last data block offset
lastDataBlockOffset = outputStream.getPos();
fsBlockWriter.writeHeaderAndData(outputStream);
int onDiskSize = fsBlockWriter.getOnDiskSizeWithHeader();
// Generate a shorter faked key into index block. For example, consider a block boundary
// between the keys "the quick brown fox" and "the who test text". We can use "the r" as the
// key for the index block entry since it is > all entries in the previous block and <= all
// entries in subsequent blocks.
if (comparator instanceof KeyComparator) {
byte[] fakeKey =
((KeyComparator) comparator).getShortMidpointKey(lastKeyOfPreviousBlock, firstKeyInBlock);
if (comparator.compare(fakeKey, firstKeyInBlock) > 0) {
throw new IOException(
"Unexpected getShortMidpointKey result, fakeKey:"
+ Bytes.toStringBinary(fakeKey)
+ ", firstKeyInBlock:"
+ Bytes.toStringBinary(firstKeyInBlock));
}
if (lastKeyOfPreviousBlock != null
&& comparator.compare(lastKeyOfPreviousBlock, fakeKey) >= 0) {
throw new IOException(
"Unexpected getShortMidpointKey result, lastKeyOfPreviousBlock:"
+ Bytes.toStringBinary(lastKeyOfPreviousBlock)
+ ", fakeKey:"
+ Bytes.toStringBinary(fakeKey));
}
dataBlockIndexWriter.addEntry(fakeKey, lastDataBlockOffset, onDiskSize);
} else {
dataBlockIndexWriter.addEntry(firstKeyInBlock, lastDataBlockOffset, onDiskSize);
}
totalUncompressedBytes += fsBlockWriter.getUncompressedSizeWithHeader();
HFile.offerWriteLatency(System.nanoTime() - startTimeNs);
if (cacheConf.shouldCacheDataOnWrite()) {
doCacheOnWrite(lastDataBlockOffset);
}
}
/** Clean up the current block */
private void finishBlock() throws IOException {
if (!fsBlockWriter.isWriting() || fsBlockWriter.blockSizeWritten() == 0) return;
// Update the first data block offset for scanning.
if (firstDataBlockOffset == -1) {
firstDataBlockOffset = outputStream.getPos();
}
// Update the last data block offset
lastDataBlockOffset = outputStream.getPos();
fsBlockWriter.writeHeaderAndData(outputStream);
int onDiskSize = fsBlockWriter.getOnDiskSizeWithHeader();
byte[] indexKey = comparator.calcIndexKey(lastKeyOfPreviousBlock, firstKeyInBlock);
dataBlockIndexWriter.addEntry(indexKey, lastDataBlockOffset, onDiskSize);
totalUncompressedBytes += fsBlockWriter.getUncompressedSizeWithHeader();
if (cacheConf.shouldCacheDataOnWrite()) {
doCacheOnWrite(lastDataBlockOffset);
}
}
/** Additional initialization steps */
protected void finishInit(final Configuration conf) {
if (fsBlockWriter != null) throw new IllegalStateException("finishInit called twice");
fsBlockWriter = new HFileBlock.Writer(blockEncoder, hFileContext);
// Data block index writer
boolean cacheIndexesOnWrite = cacheConf.shouldCacheIndexesOnWrite();
dataBlockIndexWriter =
new HFileBlockIndex.BlockIndexWriter(
fsBlockWriter,
cacheIndexesOnWrite ? cacheConf.getBlockCache() : null,
cacheIndexesOnWrite ? name : null);
dataBlockIndexWriter.setMaxChunkSize(HFileBlockIndex.getMaxChunkSize(conf));
inlineBlockWriters.add(dataBlockIndexWriter);
// Meta data block index writer
metaBlockIndexWriter = new HFileBlockIndex.BlockIndexWriter();
if (LOG.isTraceEnabled()) LOG.trace("Initialized with " + cacheConf);
}
/** Additional initialization steps */
private void finishInit(final Configuration conf) {
if (fsBlockWriter != null) throw new IllegalStateException("finishInit called twice");
// HFile filesystem-level (non-caching) block writer
fsBlockWriter =
new HFileBlock.Writer(
compressAlgo, blockEncoder, includeMemstoreTS, checksumType, bytesPerChecksum);
// Data block index writer
boolean cacheIndexesOnWrite = cacheConf.shouldCacheIndexesOnWrite();
dataBlockIndexWriter =
new HFileBlockIndex.BlockIndexWriter(
fsBlockWriter,
cacheIndexesOnWrite ? cacheConf.getBlockCache() : null,
cacheIndexesOnWrite ? name : null);
dataBlockIndexWriter.setMaxChunkSize(HFileBlockIndex.getMaxChunkSize(conf));
inlineBlockWriters.add(dataBlockIndexWriter);
// Meta data block index writer
metaBlockIndexWriter = new HFileBlockIndex.BlockIndexWriter();
if (LOG.isTraceEnabled()) LOG.trace("Initialized with " + cacheConf);
}
@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(2, HFileReaderV2.MAX_MINOR_VERSION);
// 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 = fsBlockWriter.startWriting(BlockType.META);
metaData.get(i).write(dos);
fsBlockWriter.writeHeaderAndData(outputStream);
totalUncompressedBytes += fsBlockWriter.getUncompressedSizeWithHeader();
// Add the new meta block to the meta index.
metaBlockIndexWriter.addEntry(
metaNames.get(i), offset, fsBlockWriter.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(
fsBlockWriter.startWriting(BlockType.ROOT_INDEX), "meta");
fsBlockWriter.writeHeaderAndData(outputStream);
totalUncompressedBytes += fsBlockWriter.getUncompressedSizeWithHeader();
if (this.includeMemstoreTS) {
appendFileInfo(MAX_MEMSTORE_TS_KEY, Bytes.toBytes(maxMemstoreTS));
appendFileInfo(KEY_VALUE_VERSION, Bytes.toBytes(KEY_VALUE_VER_WITH_MEMSTORE));
}
// File info
writeFileInfo(trailer, fsBlockWriter.startWriting(BlockType.FILE_INFO));
fsBlockWriter.writeHeaderAndData(outputStream);
totalUncompressedBytes += fsBlockWriter.getUncompressedSizeWithHeader();
// Load-on-open data supplied by higher levels, e.g. Bloom filters.
for (BlockWritable w : additionalLoadOnOpenData) {
fsBlockWriter.writeBlock(w, outputStream);
totalUncompressedBytes += fsBlockWriter.getUncompressedSizeWithHeader();
}
// Now finish off the trailer.
trailer.setNumDataIndexLevels(dataBlockIndexWriter.getNumLevels());
trailer.setUncompressedDataIndexSize(dataBlockIndexWriter.getTotalUncompressedSize());
trailer.setFirstDataBlockOffset(firstDataBlockOffset);
trailer.setLastDataBlockOffset(lastDataBlockOffset);
trailer.setComparatorClass(comparator.getClass());
trailer.setDataIndexCount(dataBlockIndexWriter.getNumRootEntries());
finishClose(trailer);
fsBlockWriter.release();
}