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Posted to commits@hbase.apache.org by gi...@apache.org on 2018/05/15 14:50:14 UTC
[31/50] hbase-site git commit: Published site at
26babcf013de696b899d76a3c39434b794440d8d.
http://git-wip-us.apache.org/repos/asf/hbase-site/blob/da4482ac/devapidocs/src-html/org/apache/hadoop/hbase/io/hfile/HFileBlock.html
----------------------------------------------------------------------
diff --git a/devapidocs/src-html/org/apache/hadoop/hbase/io/hfile/HFileBlock.html b/devapidocs/src-html/org/apache/hadoop/hbase/io/hfile/HFileBlock.html
index 97ceefd..b7b4236 100644
--- a/devapidocs/src-html/org/apache/hadoop/hbase/io/hfile/HFileBlock.html
+++ b/devapidocs/src-html/org/apache/hadoop/hbase/io/hfile/HFileBlock.html
@@ -103,8 +103,8 @@
<span class="sourceLineNo">095</span> * Caches cache whole blocks with trailing checksums if any. We then tag on some metadata, the<a name="line.95"></a>
<span class="sourceLineNo">096</span> * content of BLOCK_METADATA_SPACE which will be flag on if we are doing 'hbase'<a name="line.96"></a>
<span class="sourceLineNo">097</span> * checksums and then the offset into the file which is needed when we re-make a cache key<a name="line.97"></a>
-<span class="sourceLineNo">098</span> * when we return the block to the cache as 'done'. See {@link Cacheable#serialize(ByteBuffer)} and<a name="line.98"></a>
-<span class="sourceLineNo">099</span> * {@link Cacheable#getDeserializer()}.<a name="line.99"></a>
+<span class="sourceLineNo">098</span> * when we return the block to the cache as 'done'.<a name="line.98"></a>
+<span class="sourceLineNo">099</span> * See {@link Cacheable#serialize(ByteBuffer, boolean)} and {@link Cacheable#getDeserializer()}.<a name="line.99"></a>
<span class="sourceLineNo">100</span> *<a name="line.100"></a>
<span class="sourceLineNo">101</span> * <p>TODO: Should we cache the checksums? Down in Writer#getBlockForCaching(CacheConfig) where<a name="line.101"></a>
<span class="sourceLineNo">102</span> * we make a block to cache-on-write, there is an attempt at turning off checksums. This is not the<a name="line.102"></a>
@@ -333,1579 +333,1579 @@
<span class="sourceLineNo">325</span> * Creates a new {@link HFile} block from the given fields. This constructor<a name="line.325"></a>
<span class="sourceLineNo">326</span> * is used only while writing blocks and caching,<a name="line.326"></a>
<span class="sourceLineNo">327</span> * and is sitting in a byte buffer and we want to stuff the block into cache.<a name="line.327"></a>
-<span class="sourceLineNo">328</span> * See {@link Writer#getBlockForCaching(CacheConfig)}.<a name="line.328"></a>
-<span class="sourceLineNo">329</span> *<a name="line.329"></a>
-<span class="sourceLineNo">330</span> * <p>TODO: The caller presumes no checksumming<a name="line.330"></a>
-<span class="sourceLineNo">331</span> * required of this block instance since going into cache; checksum already verified on<a name="line.331"></a>
-<span class="sourceLineNo">332</span> * underlying block data pulled in from filesystem. Is that correct? What if cache is SSD?<a name="line.332"></a>
-<span class="sourceLineNo">333</span> *<a name="line.333"></a>
-<span class="sourceLineNo">334</span> * @param blockType the type of this block, see {@link BlockType}<a name="line.334"></a>
-<span class="sourceLineNo">335</span> * @param onDiskSizeWithoutHeader see {@link #onDiskSizeWithoutHeader}<a name="line.335"></a>
-<span class="sourceLineNo">336</span> * @param uncompressedSizeWithoutHeader see {@link #uncompressedSizeWithoutHeader}<a name="line.336"></a>
-<span class="sourceLineNo">337</span> * @param prevBlockOffset see {@link #prevBlockOffset}<a name="line.337"></a>
-<span class="sourceLineNo">338</span> * @param b block header ({@link HConstants#HFILEBLOCK_HEADER_SIZE} bytes)<a name="line.338"></a>
-<span class="sourceLineNo">339</span> * @param fillHeader when true, write the first 4 header fields into passed buffer.<a name="line.339"></a>
-<span class="sourceLineNo">340</span> * @param offset the file offset the block was read from<a name="line.340"></a>
-<span class="sourceLineNo">341</span> * @param onDiskDataSizeWithHeader see {@link #onDiskDataSizeWithHeader}<a name="line.341"></a>
-<span class="sourceLineNo">342</span> * @param fileContext HFile meta data<a name="line.342"></a>
-<span class="sourceLineNo">343</span> */<a name="line.343"></a>
-<span class="sourceLineNo">344</span> HFileBlock(BlockType blockType, int onDiskSizeWithoutHeader, int uncompressedSizeWithoutHeader,<a name="line.344"></a>
-<span class="sourceLineNo">345</span> long prevBlockOffset, ByteBuffer b, boolean fillHeader, long offset,<a name="line.345"></a>
-<span class="sourceLineNo">346</span> final int nextBlockOnDiskSize, int onDiskDataSizeWithHeader, HFileContext fileContext) {<a name="line.346"></a>
-<span class="sourceLineNo">347</span> init(blockType, onDiskSizeWithoutHeader, uncompressedSizeWithoutHeader,<a name="line.347"></a>
-<span class="sourceLineNo">348</span> prevBlockOffset, offset, onDiskDataSizeWithHeader, nextBlockOnDiskSize, fileContext);<a name="line.348"></a>
-<span class="sourceLineNo">349</span> this.buf = new SingleByteBuff(b);<a name="line.349"></a>
-<span class="sourceLineNo">350</span> if (fillHeader) {<a name="line.350"></a>
-<span class="sourceLineNo">351</span> overwriteHeader();<a name="line.351"></a>
-<span class="sourceLineNo">352</span> }<a name="line.352"></a>
-<span class="sourceLineNo">353</span> this.buf.rewind();<a name="line.353"></a>
-<span class="sourceLineNo">354</span> }<a name="line.354"></a>
-<span class="sourceLineNo">355</span><a name="line.355"></a>
-<span class="sourceLineNo">356</span> /**<a name="line.356"></a>
-<span class="sourceLineNo">357</span> * Creates a block from an existing buffer starting with a header. Rewinds<a name="line.357"></a>
-<span class="sourceLineNo">358</span> * and takes ownership of the buffer. By definition of rewind, ignores the<a name="line.358"></a>
-<span class="sourceLineNo">359</span> * buffer position, but if you slice the buffer beforehand, it will rewind<a name="line.359"></a>
-<span class="sourceLineNo">360</span> * to that point.<a name="line.360"></a>
-<span class="sourceLineNo">361</span> * @param buf Has header, content, and trailing checksums if present.<a name="line.361"></a>
-<span class="sourceLineNo">362</span> */<a name="line.362"></a>
-<span class="sourceLineNo">363</span> HFileBlock(ByteBuff buf, boolean usesHBaseChecksum, MemoryType memType, final long offset,<a name="line.363"></a>
-<span class="sourceLineNo">364</span> final int nextBlockOnDiskSize, HFileContext fileContext) throws IOException {<a name="line.364"></a>
-<span class="sourceLineNo">365</span> buf.rewind();<a name="line.365"></a>
-<span class="sourceLineNo">366</span> final BlockType blockType = BlockType.read(buf);<a name="line.366"></a>
-<span class="sourceLineNo">367</span> final int onDiskSizeWithoutHeader = buf.getInt(Header.ON_DISK_SIZE_WITHOUT_HEADER_INDEX);<a name="line.367"></a>
-<span class="sourceLineNo">368</span> final int uncompressedSizeWithoutHeader =<a name="line.368"></a>
-<span class="sourceLineNo">369</span> buf.getInt(Header.UNCOMPRESSED_SIZE_WITHOUT_HEADER_INDEX);<a name="line.369"></a>
-<span class="sourceLineNo">370</span> final long prevBlockOffset = buf.getLong(Header.PREV_BLOCK_OFFSET_INDEX);<a name="line.370"></a>
-<span class="sourceLineNo">371</span> // This constructor is called when we deserialize a block from cache and when we read a block in<a name="line.371"></a>
-<span class="sourceLineNo">372</span> // from the fs. fileCache is null when deserialized from cache so need to make up one.<a name="line.372"></a>
-<span class="sourceLineNo">373</span> HFileContextBuilder fileContextBuilder = fileContext != null?<a name="line.373"></a>
-<span class="sourceLineNo">374</span> new HFileContextBuilder(fileContext): new HFileContextBuilder();<a name="line.374"></a>
-<span class="sourceLineNo">375</span> fileContextBuilder.withHBaseCheckSum(usesHBaseChecksum);<a name="line.375"></a>
-<span class="sourceLineNo">376</span> int onDiskDataSizeWithHeader;<a name="line.376"></a>
-<span class="sourceLineNo">377</span> if (usesHBaseChecksum) {<a name="line.377"></a>
-<span class="sourceLineNo">378</span> byte checksumType = buf.get(Header.CHECKSUM_TYPE_INDEX);<a name="line.378"></a>
-<span class="sourceLineNo">379</span> int bytesPerChecksum = buf.getInt(Header.BYTES_PER_CHECKSUM_INDEX);<a name="line.379"></a>
-<span class="sourceLineNo">380</span> onDiskDataSizeWithHeader = buf.getInt(Header.ON_DISK_DATA_SIZE_WITH_HEADER_INDEX);<a name="line.380"></a>
-<span class="sourceLineNo">381</span> // Use the checksum type and bytes per checksum from header, not from filecontext.<a name="line.381"></a>
-<span class="sourceLineNo">382</span> fileContextBuilder.withChecksumType(ChecksumType.codeToType(checksumType));<a name="line.382"></a>
-<span class="sourceLineNo">383</span> fileContextBuilder.withBytesPerCheckSum(bytesPerChecksum);<a name="line.383"></a>
-<span class="sourceLineNo">384</span> } else {<a name="line.384"></a>
-<span class="sourceLineNo">385</span> fileContextBuilder.withChecksumType(ChecksumType.NULL);<a name="line.385"></a>
-<span class="sourceLineNo">386</span> fileContextBuilder.withBytesPerCheckSum(0);<a name="line.386"></a>
-<span class="sourceLineNo">387</span> // Need to fix onDiskDataSizeWithHeader; there are not checksums after-block-data<a name="line.387"></a>
-<span class="sourceLineNo">388</span> onDiskDataSizeWithHeader = onDiskSizeWithoutHeader + headerSize(usesHBaseChecksum);<a name="line.388"></a>
-<span class="sourceLineNo">389</span> }<a name="line.389"></a>
-<span class="sourceLineNo">390</span> fileContext = fileContextBuilder.build();<a name="line.390"></a>
-<span class="sourceLineNo">391</span> assert usesHBaseChecksum == fileContext.isUseHBaseChecksum();<a name="line.391"></a>
-<span class="sourceLineNo">392</span> init(blockType, onDiskSizeWithoutHeader, uncompressedSizeWithoutHeader,<a name="line.392"></a>
-<span class="sourceLineNo">393</span> prevBlockOffset, offset, onDiskDataSizeWithHeader, nextBlockOnDiskSize, fileContext);<a name="line.393"></a>
-<span class="sourceLineNo">394</span> this.memType = memType;<a name="line.394"></a>
-<span class="sourceLineNo">395</span> this.offset = offset;<a name="line.395"></a>
-<span class="sourceLineNo">396</span> this.buf = buf;<a name="line.396"></a>
-<span class="sourceLineNo">397</span> this.buf.rewind();<a name="line.397"></a>
-<span class="sourceLineNo">398</span> }<a name="line.398"></a>
-<span class="sourceLineNo">399</span><a name="line.399"></a>
-<span class="sourceLineNo">400</span> /**<a name="line.400"></a>
-<span class="sourceLineNo">401</span> * Called from constructors.<a name="line.401"></a>
-<span class="sourceLineNo">402</span> */<a name="line.402"></a>
-<span class="sourceLineNo">403</span> private void init(BlockType blockType, int onDiskSizeWithoutHeader,<a name="line.403"></a>
-<span class="sourceLineNo">404</span> int uncompressedSizeWithoutHeader, long prevBlockOffset,<a name="line.404"></a>
-<span class="sourceLineNo">405</span> long offset, int onDiskDataSizeWithHeader, final int nextBlockOnDiskSize,<a name="line.405"></a>
-<span class="sourceLineNo">406</span> HFileContext fileContext) {<a name="line.406"></a>
-<span class="sourceLineNo">407</span> this.blockType = blockType;<a name="line.407"></a>
-<span class="sourceLineNo">408</span> this.onDiskSizeWithoutHeader = onDiskSizeWithoutHeader;<a name="line.408"></a>
-<span class="sourceLineNo">409</span> this.uncompressedSizeWithoutHeader = uncompressedSizeWithoutHeader;<a name="line.409"></a>
-<span class="sourceLineNo">410</span> this.prevBlockOffset = prevBlockOffset;<a name="line.410"></a>
-<span class="sourceLineNo">411</span> this.offset = offset;<a name="line.411"></a>
-<span class="sourceLineNo">412</span> this.onDiskDataSizeWithHeader = onDiskDataSizeWithHeader;<a name="line.412"></a>
-<span class="sourceLineNo">413</span> this.nextBlockOnDiskSize = nextBlockOnDiskSize;<a name="line.413"></a>
-<span class="sourceLineNo">414</span> this.fileContext = fileContext;<a name="line.414"></a>
-<span class="sourceLineNo">415</span> }<a name="line.415"></a>
-<span class="sourceLineNo">416</span><a name="line.416"></a>
-<span class="sourceLineNo">417</span> /**<a name="line.417"></a>
-<span class="sourceLineNo">418</span> * Parse total on disk size including header and checksum.<a name="line.418"></a>
-<span class="sourceLineNo">419</span> * @param headerBuf Header ByteBuffer. Presumed exact size of header.<a name="line.419"></a>
-<span class="sourceLineNo">420</span> * @param verifyChecksum true if checksum verification is in use.<a name="line.420"></a>
-<span class="sourceLineNo">421</span> * @return Size of the block with header included.<a name="line.421"></a>
-<span class="sourceLineNo">422</span> */<a name="line.422"></a>
-<span class="sourceLineNo">423</span> private static int getOnDiskSizeWithHeader(final ByteBuffer headerBuf,<a name="line.423"></a>
-<span class="sourceLineNo">424</span> boolean verifyChecksum) {<a name="line.424"></a>
-<span class="sourceLineNo">425</span> return headerBuf.getInt(Header.ON_DISK_SIZE_WITHOUT_HEADER_INDEX) +<a name="line.425"></a>
-<span class="sourceLineNo">426</span> headerSize(verifyChecksum);<a name="line.426"></a>
-<span class="sourceLineNo">427</span> }<a name="line.427"></a>
-<span class="sourceLineNo">428</span><a name="line.428"></a>
-<span class="sourceLineNo">429</span> /**<a name="line.429"></a>
-<span class="sourceLineNo">430</span> * @return the on-disk size of the next block (including the header size and any checksums if<a name="line.430"></a>
-<span class="sourceLineNo">431</span> * present) read by peeking into the next block's header; use as a hint when doing<a name="line.431"></a>
-<span class="sourceLineNo">432</span> * a read of the next block when scanning or running over a file.<a name="line.432"></a>
-<span class="sourceLineNo">433</span> */<a name="line.433"></a>
-<span class="sourceLineNo">434</span> int getNextBlockOnDiskSize() {<a name="line.434"></a>
-<span class="sourceLineNo">435</span> return nextBlockOnDiskSize;<a name="line.435"></a>
-<span class="sourceLineNo">436</span> }<a name="line.436"></a>
-<span class="sourceLineNo">437</span><a name="line.437"></a>
-<span class="sourceLineNo">438</span> @Override<a name="line.438"></a>
-<span class="sourceLineNo">439</span> public BlockType getBlockType() {<a name="line.439"></a>
-<span class="sourceLineNo">440</span> return blockType;<a name="line.440"></a>
-<span class="sourceLineNo">441</span> }<a name="line.441"></a>
-<span class="sourceLineNo">442</span><a name="line.442"></a>
-<span class="sourceLineNo">443</span> /** @return get data block encoding id that was used to encode this block */<a name="line.443"></a>
-<span class="sourceLineNo">444</span> short getDataBlockEncodingId() {<a name="line.444"></a>
-<span class="sourceLineNo">445</span> if (blockType != BlockType.ENCODED_DATA) {<a name="line.445"></a>
-<span class="sourceLineNo">446</span> throw new IllegalArgumentException("Querying encoder ID of a block " +<a name="line.446"></a>
-<span class="sourceLineNo">447</span> "of type other than " + BlockType.ENCODED_DATA + ": " + blockType);<a name="line.447"></a>
-<span class="sourceLineNo">448</span> }<a name="line.448"></a>
-<span class="sourceLineNo">449</span> return buf.getShort(headerSize());<a name="line.449"></a>
-<span class="sourceLineNo">450</span> }<a name="line.450"></a>
-<span class="sourceLineNo">451</span><a name="line.451"></a>
-<span class="sourceLineNo">452</span> /**<a name="line.452"></a>
-<span class="sourceLineNo">453</span> * @return the on-disk size of header + data part + checksum.<a name="line.453"></a>
-<span class="sourceLineNo">454</span> */<a name="line.454"></a>
-<span class="sourceLineNo">455</span> public int getOnDiskSizeWithHeader() {<a name="line.455"></a>
-<span class="sourceLineNo">456</span> return onDiskSizeWithoutHeader + headerSize();<a name="line.456"></a>
-<span class="sourceLineNo">457</span> }<a name="line.457"></a>
-<span class="sourceLineNo">458</span><a name="line.458"></a>
-<span class="sourceLineNo">459</span> /**<a name="line.459"></a>
-<span class="sourceLineNo">460</span> * @return the on-disk size of the data part + checksum (header excluded).<a name="line.460"></a>
-<span class="sourceLineNo">461</span> */<a name="line.461"></a>
-<span class="sourceLineNo">462</span> int getOnDiskSizeWithoutHeader() {<a name="line.462"></a>
-<span class="sourceLineNo">463</span> return onDiskSizeWithoutHeader;<a name="line.463"></a>
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-<span class="sourceLineNo">465</span><a name="line.465"></a>
-<span class="sourceLineNo">466</span> /**<a name="line.466"></a>
-<span class="sourceLineNo">467</span> * @return the uncompressed size of data part (header and checksum excluded).<a name="line.467"></a>
-<span class="sourceLineNo">468</span> */<a name="line.468"></a>
-<span class="sourceLineNo">469</span> int getUncompressedSizeWithoutHeader() {<a name="line.469"></a>
-<span class="sourceLineNo">470</span> return uncompressedSizeWithoutHeader;<a name="line.470"></a>
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-<span class="sourceLineNo">472</span><a name="line.472"></a>
-<span class="sourceLineNo">473</span> /**<a name="line.473"></a>
-<span class="sourceLineNo">474</span> * @return the offset of the previous block of the same type in the file, or<a name="line.474"></a>
-<span class="sourceLineNo">475</span> * -1 if unknown<a name="line.475"></a>
-<span class="sourceLineNo">476</span> */<a name="line.476"></a>
-<span class="sourceLineNo">477</span> long getPrevBlockOffset() {<a name="line.477"></a>
-<span class="sourceLineNo">478</span> return prevBlockOffset;<a name="line.478"></a>
-<span class="sourceLineNo">479</span> }<a name="line.479"></a>
-<span class="sourceLineNo">480</span><a name="line.480"></a>
-<span class="sourceLineNo">481</span> /**<a name="line.481"></a>
-<span class="sourceLineNo">482</span> * Rewinds {@code buf} and writes first 4 header fields. {@code buf} position<a name="line.482"></a>
-<span class="sourceLineNo">483</span> * is modified as side-effect.<a name="line.483"></a>
-<span class="sourceLineNo">484</span> */<a name="line.484"></a>
-<span class="sourceLineNo">485</span> private void overwriteHeader() {<a name="line.485"></a>
-<span class="sourceLineNo">486</span> buf.rewind();<a name="line.486"></a>
-<span class="sourceLineNo">487</span> blockType.write(buf);<a name="line.487"></a>
-<span class="sourceLineNo">488</span> buf.putInt(onDiskSizeWithoutHeader);<a name="line.488"></a>
-<span class="sourceLineNo">489</span> buf.putInt(uncompressedSizeWithoutHeader);<a name="line.489"></a>
-<span class="sourceLineNo">490</span> buf.putLong(prevBlockOffset);<a name="line.490"></a>
-<span class="sourceLineNo">491</span> if (this.fileContext.isUseHBaseChecksum()) {<a name="line.491"></a>
-<span class="sourceLineNo">492</span> buf.put(fileContext.getChecksumType().getCode());<a name="line.492"></a>
-<span class="sourceLineNo">493</span> buf.putInt(fileContext.getBytesPerChecksum());<a name="line.493"></a>
-<span class="sourceLineNo">494</span> buf.putInt(onDiskDataSizeWithHeader);<a name="line.494"></a>
-<span class="sourceLineNo">495</span> }<a name="line.495"></a>
-<span class="sourceLineNo">496</span> }<a name="line.496"></a>
-<span class="sourceLineNo">497</span><a name="line.497"></a>
-<span class="sourceLineNo">498</span> /**<a name="line.498"></a>
-<span class="sourceLineNo">499</span> * Returns a buffer that does not include the header or checksum.<a name="line.499"></a>
-<span class="sourceLineNo">500</span> *<a name="line.500"></a>
-<span class="sourceLineNo">501</span> * @return the buffer with header skipped and checksum omitted.<a name="line.501"></a>
-<span class="sourceLineNo">502</span> */<a name="line.502"></a>
-<span class="sourceLineNo">503</span> public ByteBuff getBufferWithoutHeader() {<a name="line.503"></a>
-<span class="sourceLineNo">504</span> ByteBuff dup = getBufferReadOnly();<a name="line.504"></a>
-<span class="sourceLineNo">505</span> // Now set it up so Buffer spans content only -- no header or no checksums.<a name="line.505"></a>
-<span class="sourceLineNo">506</span> return dup.position(headerSize()).limit(buf.limit() - totalChecksumBytes()).slice();<a name="line.506"></a>
-<span class="sourceLineNo">507</span> }<a name="line.507"></a>
-<span class="sourceLineNo">508</span><a name="line.508"></a>
-<span class="sourceLineNo">509</span> /**<a name="line.509"></a>
-<span class="sourceLineNo">510</span> * Returns a read-only duplicate of the buffer this block stores internally ready to be read.<a name="line.510"></a>
-<span class="sourceLineNo">511</span> * Clients must not modify the buffer object though they may set position and limit on the<a name="line.511"></a>
-<span class="sourceLineNo">512</span> * returned buffer since we pass back a duplicate. This method has to be public because it is used<a name="line.512"></a>
-<span class="sourceLineNo">513</span> * in {@link CompoundBloomFilter} to avoid object creation on every Bloom<a name="line.513"></a>
-<span class="sourceLineNo">514</span> * filter lookup, but has to be used with caution. Buffer holds header, block content,<a name="line.514"></a>
-<span class="sourceLineNo">515</span> * and any follow-on checksums if present.<a name="line.515"></a>
-<span class="sourceLineNo">516</span> *<a name="line.516"></a>
-<span class="sourceLineNo">517</span> * @return the buffer of this block for read-only operations<a name="line.517"></a>
-<span class="sourceLineNo">518</span> */<a name="line.518"></a>
-<span class="sourceLineNo">519</span> public ByteBuff getBufferReadOnly() {<a name="line.519"></a>
-<span class="sourceLineNo">520</span> // TODO: ByteBuf does not support asReadOnlyBuffer(). Fix.<a name="line.520"></a>
-<span class="sourceLineNo">521</span> ByteBuff dup = this.buf.duplicate();<a name="line.521"></a>
-<span class="sourceLineNo">522</span> assert dup.position() == 0;<a name="line.522"></a>
-<span class="sourceLineNo">523</span> return dup;<a name="line.523"></a>
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-<span class="sourceLineNo">526</span> @VisibleForTesting<a name="line.526"></a>
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-<span class="sourceLineNo">528</span> String fieldName) throws IOException {<a name="line.528"></a>
-<span class="sourceLineNo">529</span> if (valueFromBuf != valueFromField) {<a name="line.529"></a>
-<span class="sourceLineNo">530</span> throw new AssertionError(fieldName + " in the buffer (" + valueFromBuf<a name="line.530"></a>
-<span class="sourceLineNo">531</span> + ") is different from that in the field (" + valueFromField + ")");<a name="line.531"></a>
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-<span class="sourceLineNo">533</span> }<a name="line.533"></a>
-<span class="sourceLineNo">534</span><a name="line.534"></a>
-<span class="sourceLineNo">535</span> @VisibleForTesting<a name="line.535"></a>
-<span class="sourceLineNo">536</span> private void sanityCheckAssertion(BlockType valueFromBuf, BlockType valueFromField)<a name="line.536"></a>
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+<span class="sourceLineNo">382</span> // Use the checksum type and bytes per checksum from header, not from filecontext.<a name="line.382"></a>
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+<span class="sourceLineNo">387</span> fileContextBuilder.withBytesPerCheckSum(0);<a name="line.387"></a>
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+<span class="sourceLineNo">494</span> buf.putInt(fileContext.getBytesPerChecksum());<a name="line.494"></a>
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+<span class="sourceLineNo">503</span> */<a name="line.503"></a>
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+<span class="sourceLineNo">506</span> // Now set it up so Buffer spans content only -- no header or no checksums.<a name="line.506"></a>
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+<span class="sourceLineNo">508</span> }<a name="line.508"></a>
+<span class="sourceLineNo">509</span><a name="line.509"></a>
+<span class="sourceLineNo">510</span> /**<a name="line.510"></a>
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+<span class="sourceLineNo">512</span> * Clients must not modify the buffer object though they may set position and limit on the<a name="line.512"></a>
+<span class="sourceLineNo">513</span> * returned buffer since we pass back a duplicate. This method has to be public because it is used<a name="line.513"></a>
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+<span class="sourceLineNo">515</span> * filter lookup, but has to be used with caution. Buffer holds header, block content,<a name="line.515"></a>
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+<span class="sourceLineNo">517</span> *<a name="line.517"></a>
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+<span class="sourceLineNo">532</span> + ") is different from that in the field (" + valueFromField + ")");<a name="line.532"></a>
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+<span class="sourceLineNo">535</span><a name="line.535"></a>
+<span class="sourceLineNo">536</span> @VisibleForTesting<a name="line.536"></a>
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+<span class="sourceLineNo">540</span> throw new IOException("Block type stored in the buffer: " +<a name="line.540"></a>
+<span class="sourceLineNo">541</span> valueFromBuf + ", block type field: " + valueFromField);<a name="line.541"></a>
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+<span class="sourceLineNo">543</span> }<a name="line.543"></a>
+<span class="sourceLineNo">544</span><a name="line.544"></a>
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+<span class="sourceLineNo">553</span> @VisibleForTesting<a name="line.553"></a>
+<span class="sourceLineNo">554</span> void sanityCheck() throws IOException {<a name="line.554"></a>
+<span class="sourceLineNo">555</span> // Duplicate so no side-effects<a name="line.555"></a>
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+<span class="sourceLineNo">557</span> sanityCheckAssertion(BlockType.read(dup), blockType);<a name="line.557"></a>
+<span class="sourceLineNo">558</span><a name="line.558"></a>
+<span class="sourceLineNo">559</span> sanityCheckAssertion(dup.getInt(), onDiskSizeWithoutHeader, "onDiskSizeWithoutHeader");<a name="line.559"></a>
+<span class="sourceLineNo">560</span><a name="line.560"></a>
+<span class="sourceLineNo">561</span> sanityCheckAssertion(dup.getInt(), uncompressedSizeWithoutHeader,<a name="line.561"></a>
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+<span class="sourceLineNo">563</span><a name="line.563"></a>
+<span class="sourceLineNo">564</span> sanityCheckAssertion(dup.getLong(), prevBlockOffset, "prevBlockOffset");<a name="line.564"></a>
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+<span class="sourceLineNo">567</span> sanityCheckAssertion(dup.getInt(), this.fileContext.getBytesPerChecksum(),<a name="line.567"></a>
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+<span class="sourceLineNo">571</span><a name="line.571"></a>
+<span class="sourceLineNo">572</span> int cksumBytes = totalChecksumBytes();<a name="line.572"></a>
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+<span class="sourceLineNo">574</span> if (dup.limit() != expectedBufLimit) {<a name="line.574"></a>
+<span class="sourceLineNo">575</span> throw new AssertionError("Expected limit " + expectedBufLimit + ", got " + dup.limit());<a name="line.575"></a>
+<span class="sourceLineNo">576</span> }<a name="line.576"></a>
+<span class="sourceLineNo">577</span><a name="line.577"></a>
+<span class="sourceLineNo">578</span> // We might optionally allocate HFILEBLOCK_HEADER_SIZE more bytes to read the next<a name="line.578"></a>
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+<span class="sourceLineNo">587</span> @Override<a name="line.587"></a>
+<span class="sourceLineNo">588</span> public String toString() {<a name="line.588"></a>
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+<span class="sourceLineNo">590</span> .append("[")<a name="line.590"></a>
+<span class="sourceLineNo">591</span> .append("blockType=").append(blockType)<a name="line.591"></a>
+<span class="sourceLineNo">592</span> .append(", fileOffset=").append(offset)<a name="line.592"></a>
+<span class="sourceLineNo">593</span> .append(", headerSize=").append(headerSize())<a name="line.593"></a>
+<span class="sourceLineNo">594</span> .append(", onDiskSizeWithoutHeader=").append(onDiskSizeWithoutHeader)<a name="line.594"></a>
+<span class="sourceLineNo">595</span> .append(", uncompressedSizeWithoutHeader=").append(uncompressedSizeWithoutHeader)<a name="line.595"></a>
+<span class="sourceLineNo">596</span> .append(", prevBlockOffset=").append(prevBlockOffset)<a name="line.596"></a>
+<span class="sourceLineNo">597</span> .append(", isUseHBaseChecksum=").append(fileContext.isUseHBaseChecksum());<a name="line.597"></a>
+<span class="sourceLineNo">598</span> if (fileContext.isUseHBaseChecksum()) {<a name="line.598"></a>
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+<span class="sourceLineNo">602</span> } else {<a name="line.602"></a>
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+<span class="sourceLineNo">604</span> .append("(").append(onDiskSizeWithoutHeader)<a name="line.604"></a>
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+<span class="sourceLineNo">606</span> }<a name="line.606"></a>
+<span class="sourceLineNo">607</span> String dataBegin = null;<a name="line.607"></a>
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+<span class="sourceLineNo">616</span> dataBegin = Bytes.toStringBinary(dataBeginBytes);<a name="line.616"></a>
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+<span class="sourceLineNo">620</span> .append(", isUnpacked=").append(isUnpacked())<a name="line.620"></a>
+<span class="sourceLineNo">621</span> .append(", buf=[").append(buf).append("]")<a name="line.621"></a>
+<span class="sourceLineNo">622</span> .append(", dataBeginsWith=").append(dataBegin)<a name="line.622"></a>
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+<span class="sourceLineNo">624</span> .append(", nextBlockOnDiskSize=").append(nextBlockOnDiskSize)<a name="line.624"></a>
+<span class="sourceLineNo">625</span> .append("]");<a name="line.625"></a>
+<span class="sourceLineNo">626</span> return sb.toString();<a name="line.626"></a>
+<span class="sourceLineNo">627</span> }<a name="line.627"></a>
+<span class="sourceLineNo">628</span><a name="line.628"></a>
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+<span class="sourceLineNo">635</span> // TODO: cannot use our own fileContext here because HFileBlock(ByteBuffer, boolean),<a name="line.635"></a>
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+<span class="sourceLineNo">640</span><a name="line.640"></a>
+<span class="sourceLineNo">641</span> HFileBlock unpacked = new HFileBlock(this);<a name="line.641"></a>
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<TRUNCATED>