http://git-wip-us.apache.org/repos/asf/hbase-site/blob/4f8b8424/devapidocs/src-html/org/apache/hadoop/hbase/io/hfile/HFileReaderImpl.BlockIndexNotLoadedException.html ---------------------------------------------------------------------- diff --git a/devapidocs/src-html/org/apache/hadoop/hbase/io/hfile/HFileReaderImpl.BlockIndexNotLoadedException.html b/devapidocs/src-html/org/apache/hadoop/hbase/io/hfile/HFileReaderImpl.BlockIndexNotLoadedException.html index 79cb21b..d8d391b 100644 --- a/devapidocs/src-html/org/apache/hadoop/hbase/io/hfile/HFileReaderImpl.BlockIndexNotLoadedException.html +++ b/devapidocs/src-html/org/apache/hadoop/hbase/io/hfile/HFileReaderImpl.BlockIndexNotLoadedException.html @@ -378,1508 +378,1510 @@ <span class="sourceLineNo">370</span><a name="line.370"></a> <span class="sourceLineNo">371</span> @Override<a name="line.371"></a> <span class="sourceLineNo">372</span> public void returnBlock(HFileBlock block) {<a name="line.372"></a> -<span class="sourceLineNo">373</span> BlockCache blockCache = this.cacheConf.getBlockCache();<a name="line.373"></a> -<span class="sourceLineNo">374</span> if (blockCache != null && block != null) {<a name="line.374"></a> -<span class="sourceLineNo">375</span> BlockCacheKey cacheKey = new BlockCacheKey(this.getFileContext().getHFileName(),<a name="line.375"></a> -<span class="sourceLineNo">376</span> block.getOffset(), this.isPrimaryReplicaReader(), block.getBlockType());<a name="line.376"></a> -<span class="sourceLineNo">377</span> blockCache.returnBlock(cacheKey, block);<a name="line.377"></a> -<span class="sourceLineNo">378</span> }<a name="line.378"></a> -<span class="sourceLineNo">379</span> }<a name="line.379"></a> -<span class="sourceLineNo">380</span> /**<a name="line.380"></a> -<span class="sourceLineNo">381</span> * @return the first key in the file. 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name="line.476"></a> +<span class="sourceLineNo">477</span> * is invoked on a scanner that is not seeked.<a name="line.477"></a> +<span class="sourceLineNo">478</span> */<a name="line.478"></a> +<span class="sourceLineNo">479</span> @SuppressWarnings("serial")<a name="line.479"></a> +<span class="sourceLineNo">480</span> public static class NotSeekedException extends IllegalStateException {<a name="line.480"></a> +<span class="sourceLineNo">481</span> public NotSeekedException() {<a name="line.481"></a> +<span class="sourceLineNo">482</span> super("Not seeked to a key/value");<a name="line.482"></a> +<span class="sourceLineNo">483</span> }<a name="line.483"></a> +<span class="sourceLineNo">484</span> }<a name="line.484"></a> +<span class="sourceLineNo">485</span><a name="line.485"></a> +<span class="sourceLineNo">486</span> protected static class HFileScannerImpl implements HFileScanner {<a name="line.486"></a> +<span class="sourceLineNo">487</span> private ByteBuff blockBuffer;<a name="line.487"></a> +<span class="sourceLineNo">488</span> protected final boolean cacheBlocks;<a name="line.488"></a> +<span class="sourceLineNo">489</span> protected final boolean pread;<a name="line.489"></a> +<span class="sourceLineNo">490</span> protected final boolean isCompaction;<a name="line.490"></a> +<span class="sourceLineNo">491</span> private int currKeyLen;<a name="line.491"></a> +<span class="sourceLineNo">492</span> private int currValueLen;<a name="line.492"></a> +<span class="sourceLineNo">493</span> private int currMemstoreTSLen;<a name="line.493"></a> +<span class="sourceLineNo">494</span> private long currMemstoreTS;<a name="line.494"></a> +<span class="sourceLineNo">495</span> // Updated but never read?<a name="line.495"></a> +<span class="sourceLineNo">496</span> protected AtomicInteger blockFetches = new AtomicInteger(0);<a name="line.496"></a> +<span class="sourceLineNo">497</span> protected final HFile.Reader reader;<a name="line.497"></a> +<span class="sourceLineNo">498</span> private int currTagsLen;<a name="line.498"></a> +<span class="sourceLineNo">499</span> // buffer backed keyonlyKV<a name="line.499"></a> +<span class="sourceLineNo">500</span> private ByteBufferKeyOnlyKeyValue bufBackedKeyOnlyKv = new ByteBufferKeyOnlyKeyValue();<a name="line.500"></a> +<span class="sourceLineNo">501</span> // A pair for reusing in blockSeek() so that we don't garbage lot of objects<a name="line.501"></a> +<span class="sourceLineNo">502</span> final ObjectIntPair<ByteBuffer> pair = new ObjectIntPair<>();<a name="line.502"></a> +<span class="sourceLineNo">503</span><a name="line.503"></a> +<span class="sourceLineNo">504</span> /**<a name="line.504"></a> +<span class="sourceLineNo">505</span> * The next indexed key is to keep track of the indexed key of the next data block.<a name="line.505"></a> +<span class="sourceLineNo">506</span> * If the nextIndexedKey is HConstants.NO_NEXT_INDEXED_KEY, it means that the<a name="line.506"></a> +<span 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class="sourceLineNo">517</span> public HFileScannerImpl(final HFile.Reader reader, final boolean cacheBlocks,<a name="line.517"></a> +<span class="sourceLineNo">518</span> final boolean pread, final boolean isCompaction) {<a name="line.518"></a> +<span class="sourceLineNo">519</span> this.reader = reader;<a name="line.519"></a> +<span class="sourceLineNo">520</span> this.cacheBlocks = cacheBlocks;<a name="line.520"></a> +<span class="sourceLineNo">521</span> this.pread = pread;<a name="line.521"></a> +<span class="sourceLineNo">522</span> this.isCompaction = isCompaction;<a name="line.522"></a> +<span class="sourceLineNo">523</span> }<a name="line.523"></a> +<span class="sourceLineNo">524</span><a name="line.524"></a> +<span class="sourceLineNo">525</span> void updateCurrBlockRef(HFileBlock block) {<a name="line.525"></a> +<span class="sourceLineNo">526</span> if (block != null && this.curBlock != null &&<a name="line.526"></a> +<span class="sourceLineNo">527</span> block.getOffset() == this.curBlock.getOffset()) {<a name="line.527"></a> +<span class="sourceLineNo">528</span> return;<a name="line.528"></a> +<span class="sourceLineNo">529</span> }<a name="line.529"></a> +<span class="sourceLineNo">530</span> // We don't have to keep ref to EXCLUSIVE type of block<a name="line.530"></a> +<span class="sourceLineNo">531</span> if (this.curBlock != null && this.curBlock.usesSharedMemory()) {<a name="line.531"></a> +<span class="sourceLineNo">532</span> prevBlocks.add(this.curBlock);<a name="line.532"></a> +<span class="sourceLineNo">533</span> }<a name="line.533"></a> +<span class="sourceLineNo">534</span> this.curBlock = block;<a name="line.534"></a> +<span class="sourceLineNo">535</span> }<a name="line.535"></a> +<span class="sourceLineNo">536</span><a name="line.536"></a> +<span class="sourceLineNo">537</span> void reset() {<a name="line.537"></a> +<span class="sourceLineNo">538</span> // We don't have to keep ref to EXCLUSIVE type of block<a name="line.538"></a> 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class="sourceLineNo">574</span> throw new NotSeekedException();<a name="line.574"></a> +<span class="sourceLineNo">575</span> }<a name="line.575"></a> +<span class="sourceLineNo">576</span><a name="line.576"></a> +<span class="sourceLineNo">577</span> @Override<a name="line.577"></a> +<span class="sourceLineNo">578</span> public HFile.Reader getReader() {<a name="line.578"></a> +<span class="sourceLineNo">579</span> return reader;<a name="line.579"></a> +<span class="sourceLineNo">580</span> }<a name="line.580"></a> +<span class="sourceLineNo">581</span><a name="line.581"></a> +<span class="sourceLineNo">582</span> // From non encoded HFiles, we always read back KeyValue or its descendant.(Note: When HFile<a name="line.582"></a> +<span class="sourceLineNo">583</span> // block is in DBB, it will be OffheapKV). So all parts of the Cell is in a contiguous<a name="line.583"></a> +<span class="sourceLineNo">584</span> // array/buffer. 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HBASE-9393<a name="line.596"></a> +<span class="sourceLineNo">597</span> reader.unbufferStream();<a name="line.597"></a> +<span class="sourceLineNo">598</span> }<a name="line.598"></a> +<span class="sourceLineNo">599</span> this.returnBlocks(true);<a name="line.599"></a> +<span class="sourceLineNo">600</span> }<a name="line.600"></a> +<span class="sourceLineNo">601</span><a name="line.601"></a> +<span class="sourceLineNo">602</span> // Returns the #bytes in HFile for the current cell. Used to skip these many bytes in current<a name="line.602"></a> +<span class="sourceLineNo">603</span> // HFile block's buffer so as to position to the next cell.<a name="line.603"></a> +<span class="sourceLineNo">604</span> private int getCurCellSerializedSize() {<a name="line.604"></a> +<span class="sourceLineNo">605</span> int curCellSize = KEY_VALUE_LEN_SIZE + currKeyLen + currValueLen<a name="line.605"></a> +<span class="sourceLineNo">606</span> + currMemstoreTSLen;<a name="line.606"></a> +<span class="sourceLineNo">607</span> if (this.reader.getFileContext().isIncludesTags()) {<a name="line.607"></a> +<span class="sourceLineNo">608</span> curCellSize += Bytes.SIZEOF_SHORT + currTagsLen;<a name="line.608"></a> +<span class="sourceLineNo">609</span> }<a name="line.609"></a> +<span class="sourceLineNo">610</span> return curCellSize;<a name="line.610"></a> +<span class="sourceLineNo">611</span> }<a name="line.611"></a> +<span class="sourceLineNo">612</span><a name="line.612"></a> +<span class="sourceLineNo">613</span> protected void readKeyValueLen() {<a name="line.613"></a> +<span class="sourceLineNo">614</span> // This is a hot method. 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In micro-benchmarking, even<a name="line.618"></a> +<span class="sourceLineNo">619</span> // with the extra bit-fiddling, this is order-of-magnitude faster than getting two ints.<a name="line.619"></a> +<span class="sourceLineNo">620</span> // Trying to imitate what was done - need to profile if this is better or<a name="line.620"></a> +<span class="sourceLineNo">621</span> // earlier way is better by doing mark and reset?<a name="line.621"></a> +<span class="sourceLineNo">622</span> // But ensure that you read long instead of two ints<a name="line.622"></a> +<span class="sourceLineNo">623</span> long ll = blockBuffer.getLongAfterPosition(0);<a name="line.623"></a> +<span class="sourceLineNo">624</span> // Read top half as an int of key length and bottom int as value length<a name="line.624"></a> +<span class="sourceLineNo">625</span> this.currKeyLen = (int)(ll >> Integer.SIZE);<a name="line.625"></a> +<span class="sourceLineNo">626</span> this.currValueLen = (int)(Bytes.MASK_FOR_LOWER_INT_IN_LONG ^ ll);<a name="line.626"></a> +<span class="sourceLineNo">627</span> checkKeyValueLen();<a name="line.627"></a> +<span class="sourceLineNo">628</span> // Move position past the key and value lengths and then beyond the key and value<a name="line.628"></a> +<span class="sourceLineNo">629</span> int p = (Bytes.SIZEOF_LONG + currKeyLen + currValueLen);<a name="line.629"></a> +<span class="sourceLineNo">630</span> if (reader.getFileContext().isIncludesTags()) {<a name="line.630"></a> +<span class="sourceLineNo">631</span> // Tags length is a short.<a name="line.631"></a> +<span class="sourceLineNo">632</span> this.currTagsLen = blockBuffer.getShortAfterPosition(p);<a name="line.632"></a> +<span class="sourceLineNo">633</span> checkTagsLen();<a name="line.633"></a> +<span class="sourceLineNo">634</span> p += (Bytes.SIZEOF_SHORT + currTagsLen);<a name="line.634"></a> +<span class="sourceLineNo">635</span> }<a name="line.635"></a> +<span class="sourceLineNo">636</span> readMvccVersion(p);<a name="line.636"></a> +<span class="sourceLineNo">637</span> }<a name="line.637"></a> +<span class="sourceLineNo">638</span><a name="line.638"></a> +<span class="sourceLineNo">639</span> private final void checkTagsLen() {<a name="line.639"></a> +<span class="sourceLineNo">640</span> if (checkLen(this.currTagsLen)) {<a name="line.640"></a> +<span class="sourceLineNo">641</span> throw new IllegalStateException("Invalid currTagsLen " + this.currTagsLen +<a name="line.641"></a> +<span class="sourceLineNo">642</span> ". Block offset: " + curBlock.getOffset() + ", block length: " +<a name="line.642"></a> +<span class="sourceLineNo">643</span> this.blockBuffer.limit() +<a name="line.643"></a> +<span class="sourceLineNo">644</span> ", position: " + this.blockBuffer.position() + " (without header).");<a name="line.644"></a> +<span class="sourceLineNo">645</span> }<a name="line.645"></a> +<span class="sourceLineNo">646</span> }<a name="line.646"></a> +<span class="sourceLineNo">647</span><a name="line.647"></a> +<span class="sourceLineNo">648</span> /**<a name="line.648"></a> +<span class="sourceLineNo">649</span> * Read mvcc. Does checks to see if we even need to read the mvcc at all.<a name="line.649"></a> +<span class="sourceLineNo">650</span> * @param offsetFromPos<a name="line.650"></a> +<span class="sourceLineNo">651</span> */<a name="line.651"></a> +<span class="sourceLineNo">652</span> protected void readMvccVersion(final int offsetFromPos) {<a name="line.652"></a> +<span class="sourceLineNo">653</span> // See if we even need to decode mvcc.<a name="line.653"></a> +<span class="sourceLineNo">654</span> if (!this.reader.shouldIncludeMemStoreTS()) return;<a name="line.654"></a> +<span class="sourceLineNo">655</span> if (!this.reader.isDecodeMemStoreTS()) {<a name="line.655"></a> +<span class="sourceLineNo">656</span> currMemstoreTS = 0;<a name="line.656"></a> +<span class="sourceLineNo">657</span> currMemstoreTSLen = 1;<a name="line.657"></a> +<span class="sourceLineNo">658</span> return;<a name="line.658"></a> +<span class="sourceLineNo">659</span> }<a name="line.659"></a> +<span class="sourceLineNo">660</span> _readMvccVersion(offsetFromPos);<a name="line.660"></a> +<span class="sourceLineNo">661</span> }<a name="line.661"></a> +<span class="sourceLineNo">662</span><a name="line.662"></a> +<span class="sourceLineNo">663</span> /**<a name="line.663"></a> +<span class="sourceLineNo">664</span> * Actually do the mvcc read. Does no checks.<a name="line.664"></a> +<span class="sourceLineNo">665</span> * @param offsetFromPos<a name="line.665"></a> +<span class="sourceLineNo">666</span> */<a name="line.666"></a> +<span class="sourceLineNo">667</span> private void _readMvccVersion(int offsetFromPos) {<a name="line.667"></a> +<span class="sourceLineNo">668</span> // This is Bytes#bytesToVint inlined so can save a few instructions in this hot method; i.e.<a name="line.668"></a> +<span class="sourceLineNo">669</span> // previous if one-byte vint, we'd redo the vint call to find int size.<a name="line.669"></a> +<span class="sourceLineNo">670</span> // Also the method is kept small so can be inlined.<a name="line.670"></a> +<span class="sourceLineNo">671</span> byte firstByte = blockBuffer.getByteAfterPosition(offsetFromPos);<a name="line.671"></a> +<span class="sourceLineNo">672</span> int len = WritableUtils.decodeVIntSize(firstByte);<a name="line.672"></a> +<span class="sourceLineNo">673</span> if (len == 1) {<a name="line.673"></a> +<span class="sourceLineNo">674</span> this.currMemstoreTS = firstByte;<a name="line.674"></a> +<span class="sourceLineNo">675</span> } else {<a name="line.675"></a> +<span class="sourceLineNo">676</span> int remaining = len -1;<a name="line.676"></a> +<span class="sourceLineNo">677</span> long i = 0;<a name="line.677"></a> +<span class="sourceLineNo">678</span> offsetFromPos++;<a name="line.678"></a> +<span class="sourceLineNo">679</span> if (remaining >= Bytes.SIZEOF_INT) {<a name="line.679"></a> +<span class="sourceLineNo">680</span> // The int read has to be converted to unsigned long so the & op<a name="line.680"></a> +<span class="sourceLineNo">681</span> i = (blockBuffer.getIntAfterPosition(offsetFromPos) & 0x00000000ffffffffL);<a name="line.681"></a> +<span class="sourceLineNo">682</span> remaining -= Bytes.SIZEOF_INT;<a name="line.682"></a> +<span class="sourceLineNo">683</span> offsetFromPos += Bytes.SIZEOF_INT;<a name="line.683"></a> +<span class="sourceLineNo">684</span> }<a name="line.684"></a> +<span class="sourceLineNo">685</span> if (remaining >= Bytes.SIZEOF_SHORT) {<a name="line.685"></a> +<span class="sourceLineNo">686</span> short s = blockBuffer.getShortAfterPosition(offsetFromPos);<a name="line.686"></a> +<span class="sourceLineNo">687</span> i = i << 16;<a name="line.687"></a> +<span class="sourceLineNo">688</span> i = i | (s & 0xFFFF);<a name="line.688"></a> +<span class="sourceLineNo">689</span> remaining -= Bytes.SIZEOF_SHORT;<a name="line.689"></a> +<span class="sourceLineNo">690</span> offsetFromPos += Bytes.SIZEOF_SHORT;<a name="line.690"></a> +<span class="sourceLineNo">691</span> }<a name="line.691"></a> +<span class="sourceLineNo">692</span> for (int idx = 0; idx < remaining; idx++) {<a name="line.692"></a> +<span class="sourceLineNo">693</span> byte b = blockBuffer.getByteAfterPosition(offsetFromPos + idx);<a name="line.693"></a> +<span class="sourceLineNo">694</span> i = i << 8;<a name="line.694"></a> +<span class="sourceLineNo">695</span> i = i | (b & 0xFF);<a name="line.695"></a> +<span class="sourceLineNo">696</span> }<a name="line.696"></a> +<span class="sourceLineNo">697</span> currMemstoreTS = (WritableUtils.isNegativeVInt(firstByte) ? ~i : i);<a name="line.697"></a> +<span class="sourceLineNo">698</span> }<a name="line.698"></a> +<span class="sourceLineNo">699</span> this.currMemstoreTSLen = len;<a name="line.699"></a> +<span class="sourceLineNo">700</span> }<a name="line.700"></a> +<span class="sourceLineNo">701</span><a name="line.701"></a> +<span class="sourceLineNo">702</span> /**<a name="line.702"></a> +<
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