http://git-wip-us.apache.org/repos/asf/hbase-site/blob/40ef21e4/devapidocs/src-html/org/apache/hadoop/hbase/io/hfile/HFileReaderImpl.HFileScannerImpl.ShareableMemoryOffheapKeyValue.html ---------------------------------------------------------------------- diff --git a/devapidocs/src-html/org/apache/hadoop/hbase/io/hfile/HFileReaderImpl.HFileScannerImpl.ShareableMemoryOffheapKeyValue.html b/devapidocs/src-html/org/apache/hadoop/hbase/io/hfile/HFileReaderImpl.HFileScannerImpl.ShareableMemoryOffheapKeyValue.html index c36648a..e9ef9bc 100644 --- a/devapidocs/src-html/org/apache/hadoop/hbase/io/hfile/HFileReaderImpl.HFileScannerImpl.ShareableMemoryOffheapKeyValue.html +++ b/devapidocs/src-html/org/apache/hadoop/hbase/io/hfile/HFileReaderImpl.HFileScannerImpl.ShareableMemoryOffheapKeyValue.html @@ -256,1651 +256,1657 @@ <span class="sourceLineNo">248</span> if (cacheConf.shouldPrefetchOnOpen()) {<a name="line.248"></a> <span class="sourceLineNo">249</span> PrefetchExecutor.request(path, new Runnable() {<a name="line.249"></a> <span class="sourceLineNo">250</span> public void run() {<a name="line.250"></a> -<span class="sourceLineNo">251</span> try {<a name="line.251"></a> -<span class="sourceLineNo">252</span> long offset = 0;<a name="line.252"></a> -<span class="sourceLineNo">253</span> long end = fileSize - getTrailer().getTrailerSize();<a name="line.253"></a> -<span class="sourceLineNo">254</span> HFileBlock prevBlock = null;<a name="line.254"></a> -<span class="sourceLineNo">255</span> while (offset < end) {<a name="line.255"></a> -<span class="sourceLineNo">256</span> if (Thread.interrupted()) {<a name="line.256"></a> -<span class="sourceLineNo">257</span> break;<a name="line.257"></a> -<span class="sourceLineNo">258</span> }<a name="line.258"></a> -<span class="sourceLineNo">259</span> long onDiskSize = -1;<a name="line.259"></a> -<span class="sourceLineNo">260</span> if (prevBlock != null) {<a name="line.260"></a> -<span class="sourceLineNo">261</span> onDiskSize = prevBlock.getNextBlockOnDiskSizeWithHeader();<a name="line.261"></a> +<span class="sourceLineNo">251</span> long offset = 0;<a name="line.251"></a> +<span class="sourceLineNo">252</span> long end = 0;<a name="line.252"></a> +<span class="sourceLineNo">253</span> try {<a name="line.253"></a> +<span class="sourceLineNo">254</span> end = getTrailer().getLoadOnOpenDataOffset();<a name="line.254"></a> +<span class="sourceLineNo">255</span> HFileBlock prevBlock = null;<a name="line.255"></a> +<span class="sourceLineNo">256</span> if (LOG.isTraceEnabled()) {<a name="line.256"></a> +<span class="sourceLineNo">257</span> LOG.trace("File=" + path.toString() + ", offset=" + offset + ", end=" + end);<a name="line.257"></a> +<span class="sourceLineNo">258</span> }<a name="line.258"></a> +<span class="sourceLineNo">259</span> while (offset < end) {<a name="line.259"></a> +<span class="sourceLineNo">260</span> if (Thread.interrupted()) {<a name="line.260"></a> +<span class="sourceLineNo">261</span> break;<a name="line.261"></a> <span class="sourceLineNo">262</span> }<a name="line.262"></a> -<span class="sourceLineNo">263</span> HFileBlock block = readBlock(offset, onDiskSize, true, false, false, false,<a name="line.263"></a> -<span class="sourceLineNo">264</span> null, null);<a name="line.264"></a> -<span class="sourceLineNo">265</span> // Need not update the current block. Ideally here the readBlock won't find the<a name="line.265"></a> -<span class="sourceLineNo">266</span> // block in cache. We call this readBlock so that block data is read from FS and<a name="line.266"></a> -<span class="sourceLineNo">267</span> // cached in BC. So there is no reference count increment that happens here.<a name="line.267"></a> -<span class="sourceLineNo">268</span> // The return will ideally be a noop because the block is not of MemoryType SHARED.<a name="line.268"></a> -<span class="sourceLineNo">269</span> returnBlock(block);<a name="line.269"></a> -<span class="sourceLineNo">270</span> prevBlock = block;<a name="line.270"></a> -<span class="sourceLineNo">271</span> offset += block.getOnDiskSizeWithHeader();<a name="line.271"></a> -<span class="sourceLineNo">272</span> }<a name="line.272"></a> -<span class="sourceLineNo">273</span> } catch (IOException e) {<a name="line.273"></a> -<span class="sourceLineNo">274</span> // IOExceptions are probably due to region closes (relocation, etc.)<a name="line.274"></a> -<span class="sourceLineNo">275</span> if (LOG.isTraceEnabled()) {<a name="line.275"></a> -<span class="sourceLineNo">276</span> LOG.trace("Exception encountered while prefetching " + path + ":", e);<a name="line.276"></a> -<span class="sourceLineNo">277</span> }<a name="line.277"></a> -<span class="sourceLineNo">278</span> } catch (Exception e) {<a name="line.278"></a> -<span class="sourceLineNo">279</span> // Other exceptions are interesting<a name="line.279"></a> -<span class="sourceLineNo">280</span> LOG.warn("Exception encountered while prefetching " + path + ":", e);<a name="line.280"></a> -<span class="sourceLineNo">281</span> } finally {<a name="line.281"></a> -<span class="sourceLineNo">282</span> PrefetchExecutor.complete(path);<a name="line.282"></a> -<span class="sourceLineNo">283</span> }<a name="line.283"></a> -<span class="sourceLineNo">284</span> }<a name="line.284"></a> -<span class="sourceLineNo">285</span> });<a name="line.285"></a> -<span class="sourceLineNo">286</span> }<a name="line.286"></a> -<span class="sourceLineNo">287</span><a name="line.287"></a> -<span class="sourceLineNo">288</span> byte[] tmp = fileInfo.get(FileInfo.MAX_TAGS_LEN);<a name="line.288"></a> -<span class="sourceLineNo">289</span> // max tag length is not present in the HFile means tags were not at all written to file.<a name="line.289"></a> -<span class="sourceLineNo">290</span> if (tmp != null) {<a name="line.290"></a> -<span class="sourceLineNo">291</span> hfileContext.setIncludesTags(true);<a name="line.291"></a> -<span class="sourceLineNo">292</span> tmp = fileInfo.get(FileInfo.TAGS_COMPRESSED);<a name="line.292"></a> -<span class="sourceLineNo">293</span> if (tmp != null && Bytes.toBoolean(tmp)) {<a name="line.293"></a> -<span class="sourceLineNo">294</span> hfileContext.setCompressTags(true);<a name="line.294"></a> -<span class="sourceLineNo">295</span> }<a name="line.295"></a> -<span class="sourceLineNo">296</span> }<a name="line.296"></a> -<span class="sourceLineNo">297</span> }<a name="line.297"></a> -<span class="sourceLineNo">298</span><a name="line.298"></a> -<span class="sourceLineNo">299</span> /**<a name="line.299"></a> -<span class="sourceLineNo">300</span> * File version check is a little sloppy. We read v3 files but can also read v2 files if their<a name="line.300"></a> -<span class="sourceLineNo">301</span> * content has been pb'd; files written with 0.98.<a name="line.301"></a> -<span class="sourceLineNo">302</span> */<a name="line.302"></a> -<span class="sourceLineNo">303</span> private void checkFileVersion() {<a name="line.303"></a> -<span class="sourceLineNo">304</span> int majorVersion = trailer.getMajorVersion();<a name="line.304"></a> -<span class="sourceLineNo">305</span> if (majorVersion == getMajorVersion()) return;<a name="line.305"></a> -<span class="sourceLineNo">306</span> int minorVersion = trailer.getMinorVersion();<a name="line.306"></a> -<span class="sourceLineNo">307</span> if (majorVersion == 2 && minorVersion >= MIN_V2_MINOR_VERSION_WITH_PB) return;<a name="line.307"></a> -<span class="sourceLineNo">308</span> // We can read v3 or v2 versions of hfile.<a name="line.308"></a> -<span class="sourceLineNo">309</span> throw new IllegalArgumentException("Invalid HFile version: major=" +<a name="line.309"></a> -<span class="sourceLineNo">310</span> trailer.getMajorVersion() + ", minor=" + trailer.getMinorVersion() + ": expected at least " +<a name="line.310"></a> -<span class="sourceLineNo">311</span> "major=2 and minor=" + MAX_MINOR_VERSION);<a name="line.311"></a> -<span class="sourceLineNo">312</span> }<a name="line.312"></a> -<span class="sourceLineNo">313</span><a name="line.313"></a> -<span class="sourceLineNo">314</span> @SuppressWarnings("serial")<a name="line.314"></a> -<span class="sourceLineNo">315</span> public static class BlockIndexNotLoadedException extends IllegalStateException {<a name="line.315"></a> -<span class="sourceLineNo">316</span> public BlockIndexNotLoadedException() {<a name="line.316"></a> -<span class="sourceLineNo">317</span> // Add a message in case anyone relies on it as opposed to class name.<a name="line.317"></a> -<span class="sourceLineNo">318</span> super("Block index not loaded");<a name="line.318"></a> -<span class="sourceLineNo">319</span> }<a name="line.319"></a> -<span class="sourceLineNo">320</span> }<a name="line.320"></a> -<span class="sourceLineNo">321</span><a name="line.321"></a> -<span class="sourceLineNo">322</span> private String toStringFirstKey() {<a name="line.322"></a> -<span class="sourceLineNo">323</span> if(getFirstKey() == null)<a name="line.323"></a> -<span class="sourceLineNo">324</span> return null;<a name="line.324"></a> -<span class="sourceLineNo">325</span> return CellUtil.getCellKeyAsString(getFirstKey());<a name="line.325"></a> -<span class="sourceLineNo">326</span> }<a name="line.326"></a> -<span class="sourceLineNo">327</span><a name="line.327"></a> -<span class="sourceLineNo">328</span> private String toStringLastKey() {<a name="line.328"></a> -<span class="sourceLineNo">329</span> return CellUtil.toString(getLastKey(), false);<a name="line.329"></a> +<span class="sourceLineNo">263</span> long onDiskSize = -1;<a name="line.263"></a> +<span class="sourceLineNo">264</span> if (prevBlock != null) {<a name="line.264"></a> +<span class="sourceLineNo">265</span> onDiskSize = prevBlock.getNextBlockOnDiskSizeWithHeader();<a name="line.265"></a> +<span class="sourceLineNo">266</span> }<a name="line.266"></a> +<span class="sourceLineNo">267</span> HFileBlock block = readBlock(offset, onDiskSize, true, false, false, false,<a name="line.267"></a> +<span class="sourceLineNo">268</span> null, null);<a name="line.268"></a> +<span class="sourceLineNo">269</span> // Need not update the current block. Ideally here the readBlock won't find the<a name="line.269"></a> +<span class="sourceLineNo">270</span> // block in cache. We call this readBlock so that block data is read from FS and<a name="line.270"></a> +<span class="sourceLineNo">271</span> // cached in BC. So there is no reference count increment that happens here.<a name="line.271"></a> +<span class="sourceLineNo">272</span> // The return will ideally be a noop because the block is not of MemoryType SHARED.<a name="line.272"></a> +<span class="sourceLineNo">273</span> returnBlock(block);<a name="line.273"></a> +<span class="sourceLineNo">274</span> prevBlock = block;<a name="line.274"></a> +<span class="sourceLineNo">275</span> offset += block.getOnDiskSizeWithHeader();<a name="line.275"></a> +<span class="sourceLineNo">276</span> }<a name="line.276"></a> +<span class="sourceLineNo">277</span> } catch (IOException e) {<a name="line.277"></a> +<span class="sourceLineNo">278</span> // IOExceptions are probably due to region closes (relocation, etc.)<a name="line.278"></a> +<span class="sourceLineNo">279</span> if (LOG.isTraceEnabled()) {<a name="line.279"></a> +<span class="sourceLineNo">280</span> LOG.trace("File=" + path.toString() + ", offset=" + offset + ", end=" + end, e);<a name="line.280"></a> +<span class="sourceLineNo">281</span> }<a name="line.281"></a> +<span class="sourceLineNo">282</span> } catch (Exception e) {<a name="line.282"></a> +<span class="sourceLineNo">283</span> // Other exceptions are interesting<a name="line.283"></a> +<span class="sourceLineNo">284</span> LOG.warn("File=" + path.toString() + ", offset=" + offset + ", end=" + end, e);<a name="line.284"></a> +<span class="sourceLineNo">285</span> } finally {<a name="line.285"></a> +<span class="sourceLineNo">286</span> PrefetchExecutor.complete(path);<a name="line.286"></a> +<span class="sourceLineNo">287</span> }<a name="line.287"></a> +<span class="sourceLineNo">288</span> }<a name="line.288"></a> +<span class="sourceLineNo">289</span> });<a name="line.289"></a> +<span class="sourceLineNo">290</span> }<a name="line.290"></a> +<span class="sourceLineNo">291</span><a name="line.291"></a> +<span class="sourceLineNo">292</span> byte[] tmp = fileInfo.get(FileInfo.MAX_TAGS_LEN);<a name="line.292"></a> +<span class="sourceLineNo">293</span> // max tag length is not present in the HFile means tags were not at all written to file.<a name="line.293"></a> +<span class="sourceLineNo">294</span> if (tmp != null) {<a name="line.294"></a> +<span class="sourceLineNo">295</span> hfileContext.setIncludesTags(true);<a name="line.295"></a> +<span class="sourceLineNo">296</span> tmp = fileInfo.get(FileInfo.TAGS_COMPRESSED);<a name="line.296"></a> +<span class="sourceLineNo">297</span> if (tmp != null && Bytes.toBoolean(tmp)) {<a name="line.297"></a> +<span class="sourceLineNo">298</span> hfileContext.setCompressTags(true);<a name="line.298"></a> +<span class="sourceLineNo">299</span> }<a name="line.299"></a> +<span class="sourceLineNo">300</span> }<a name="line.300"></a> +<span class="sourceLineNo">301</span> }<a name="line.301"></a> +<span class="sourceLineNo">302</span><a name="line.302"></a> +<span class="sourceLineNo">303</span> /**<a name="line.303"></a> +<span class="sourceLineNo">304</span> * File version check is a little sloppy. We read v3 files but can also read v2 files if their<a name="line.304"></a> +<span class="sourceLineNo">305</span> * content has been pb'd; files written with 0.98.<a name="line.305"></a> +<span class="sourceLineNo">306</span> */<a name="line.306"></a> +<span class="sourceLineNo">307</span> private void checkFileVersion() {<a name="line.307"></a> +<span class="sourceLineNo">308</span> int majorVersion = trailer.getMajorVersion();<a name="line.308"></a> +<span class="sourceLineNo">309</span> if (majorVersion == getMajorVersion()) return;<a name="line.309"></a> +<span class="sourceLineNo">310</span> int minorVersion = trailer.getMinorVersion();<a name="line.310"></a> +<span class="sourceLineNo">311</span> if (majorVersion == 2 && minorVersion >= MIN_V2_MINOR_VERSION_WITH_PB) return;<a name="line.311"></a> +<span class="sourceLineNo">312</span> // We can read v3 or v2 versions of hfile.<a name="line.312"></a> +<span class="sourceLineNo">313</span> throw new IllegalArgumentException("Invalid HFile version: major=" +<a name="line.313"></a> +<span class="sourceLineNo">314</span> trailer.getMajorVersion() + ", minor=" + trailer.getMinorVersion() + ": expected at least " +<a name="line.314"></a> +<span class="sourceLineNo">315</span> "major=2 and minor=" + MAX_MINOR_VERSION);<a name="line.315"></a> +<span class="sourceLineNo">316</span> }<a name="line.316"></a> +<span class="sourceLineNo">317</span><a name="line.317"></a> +<span class="sourceLineNo">318</span> @SuppressWarnings("serial")<a name="line.318"></a> +<span class="sourceLineNo">319</span> public static class BlockIndexNotLoadedException extends IllegalStateException {<a name="line.319"></a> +<span class="sourceLineNo">320</span> public BlockIndexNotLoadedException() {<a name="line.320"></a> +<span class="sourceLineNo">321</span> // Add a message in case anyone relies on it as opposed to class name.<a name="line.321"></a> +<span class="sourceLineNo">322</span> super("Block index not loaded");<a name="line.322"></a> +<span class="sourceLineNo">323</span> }<a name="line.323"></a> +<span class="sourceLineNo">324</span> }<a name="line.324"></a> +<span class="sourceLineNo">325</span><a name="line.325"></a> +<span class="sourceLineNo">326</span> private String toStringFirstKey() {<a name="line.326"></a> +<span class="sourceLineNo">327</span> if(getFirstKey() == null)<a name="line.327"></a> +<span class="sourceLineNo">328</span> return null;<a name="line.328"></a> +<span class="sourceLineNo">329</span> return CellUtil.getCellKeyAsString(getFirstKey());<a name="line.329"></a> <span class="sourceLineNo">330</span> }<a name="line.330"></a> <span class="sourceLineNo">331</span><a name="line.331"></a> -<span class="sourceLineNo">332</span> @Override<a name="line.332"></a> -<span class="sourceLineNo">333</span> public String toString() {<a name="line.333"></a> -<span class="sourceLineNo">334</span> return "reader=" + path.toString() +<a name="line.334"></a> -<span class="sourceLineNo">335</span> (!isFileInfoLoaded()? "":<a name="line.335"></a> -<span class="sourceLineNo">336</span> ", compression=" + compressAlgo.getName() +<a name="line.336"></a> -<span class="sourceLineNo">337</span> ", cacheConf=" + cacheConf +<a name="line.337"></a> -<span class="sourceLineNo">338</span> ", firstKey=" + toStringFirstKey() +<a name="line.338"></a> -<span class="sourceLineNo">339</span> ", lastKey=" + toStringLastKey()) +<a name="line.339"></a> -<span class="sourceLineNo">340</span> ", avgKeyLen=" + avgKeyLen +<a name="line.340"></a> -<span class="sourceLineNo">341</span> ", avgValueLen=" + avgValueLen +<a name="line.341"></a> -<span class="sourceLineNo">342</span> ", entries=" + trailer.getEntryCount() +<a name="line.342"></a> -<span class="sourceLineNo">343</span> ", length=" + fileSize;<a name="line.343"></a> -<span class="sourceLineNo">344</span> }<a name="line.344"></a> -<span class="sourceLineNo">345</span><a name="line.345"></a> -<span class="sourceLineNo">346</span> @Override<a name="line.346"></a> -<span class="sourceLineNo">347</span> public long length() {<a name="line.347"></a> -<span class="sourceLineNo">348</span> return fileSize;<a name="line.348"></a> -<span class="sourceLineNo">349</span> }<a name="line.349"></a> -<span class="sourceLineNo">350</span><a name="line.350"></a> -<span class="sourceLineNo">351</span> @Override<a name="line.351"></a> -<span class="sourceLineNo">352</span> public void returnBlock(HFileBlock block) {<a name="line.352"></a> -<span class="sourceLineNo">353</span> BlockCache blockCache = this.cacheConf.getBlockCache();<a name="line.353"></a> -<span class="sourceLineNo">354</span> if (blockCache != null && block != null) {<a name="line.354"></a> -<span class="sourceLineNo">355</span> BlockCacheKey cacheKey = new BlockCacheKey(this.getFileContext().getHFileName(),<a name="line.355"></a> -<span class="sourceLineNo">356</span> block.getOffset(), this.isPrimaryReplicaReader());<a name="line.356"></a> -<span class="sourceLineNo">357</span> blockCache.returnBlock(cacheKey, block);<a name="line.357"></a> -<span class="sourceLineNo">358</span> }<a name="line.358"></a> -<span class="sourceLineNo">359</span> }<a name="line.359"></a> -<span class="sourceLineNo">360</span> /**<a name="line.360"></a> -<span class="sourceLineNo">361</span> * @return the first key in the file. May be null if file has no entries. Note<a name="line.361"></a> -<span class="sourceLineNo">362</span> * that this is not the first row key, but rather the byte form of the<a name="line.362"></a> -<span class="sourceLineNo">363</span> * first KeyValue.<a name="line.363"></a> -<span class="sourceLineNo">364</span> */<a name="line.364"></a> -<span class="sourceLineNo">365</span> @Override<a name="line.365"></a> -<span class="sourceLineNo">366</span> public Cell getFirstKey() {<a name="line.366"></a> -<span class="sourceLineNo">367</span> if (dataBlockIndexReader == null) {<a name="line.367"></a> -<span class="sourceLineNo">368</span> throw new BlockIndexNotLoadedException();<a name="line.368"></a> -<span class="sourceLineNo">369</span> }<a name="line.369"></a> -<span class="sourceLineNo">370</span> return dataBlockIndexReader.isEmpty() ? null<a name="line.370"></a> -<span class="sourceLineNo">371</span> : dataBlockIndexReader.getRootBlockKey(0);<a name="line.371"></a> -<span class="sourceLineNo">372</span> }<a name="line.372"></a> -<span class="sourceLineNo">373</span><a name="line.373"></a> -<span class="sourceLineNo">374</span> /**<a name="line.374"></a> -<span class="sourceLineNo">375</span> * TODO left from {@link HFile} version 1: move this to StoreFile after Ryan's<a name="line.375"></a> -<span class="sourceLineNo">376</span> * patch goes in to eliminate {@link KeyValue} here.<a name="line.376"></a> -<span class="sourceLineNo">377</span> *<a name="line.377"></a> -<span class="sourceLineNo">378</span> * @return the first row key, or null if the file is empty.<a name="line.378"></a> -<span class="sourceLineNo">379</span> */<a name="line.379"></a> -<span class="sourceLineNo">380</span> @Override<a name="line.380"></a> -<span class="sourceLineNo">381</span> public byte[] getFirstRowKey() {<a name="line.381"></a> -<span class="sourceLineNo">382</span> Cell firstKey = getFirstKey();<a name="line.382"></a> -<span class="sourceLineNo">383</span> // We have to copy the row part to form the row key alone<a name="line.383"></a> -<span class="sourceLineNo">384</span> return firstKey == null? null: CellUtil.cloneRow(firstKey);<a name="line.384"></a> -<span class="sourceLineNo">385</span> }<a name="line.385"></a> -<span class="sourceLineNo">386</span><a name="line.386"></a> -<span class="sourceLineNo">387</span> /**<a name="line.387"></a> -<span class="sourceLineNo">388</span> * TODO left from {@link HFile} version 1: move this to StoreFile after<a name="line.388"></a> -<span class="sourceLineNo">389</span> * Ryan's patch goes in to eliminate {@link KeyValue} here.<a name="line.389"></a> -<span class="sourceLineNo">390</span> *<a name="line.390"></a> -<span class="sourceLineNo">391</span> * @return the last row key, or null if the file is empty.<a name="line.391"></a> -<span class="sourceLineNo">392</span> */<a name="line.392"></a> -<span class="sourceLineNo">393</span> @Override<a name="line.393"></a> -<span class="sourceLineNo">394</span> public byte[] getLastRowKey() {<a name="line.394"></a> -<span class="sourceLineNo">395</span> Cell lastKey = getLastKey();<a name="line.395"></a> -<span class="sourceLineNo">396</span> return lastKey == null? null: CellUtil.cloneRow(lastKey);<a name="line.396"></a> -<span class="sourceLineNo">397</span> }<a name="line.397"></a> -<span class="sourceLineNo">398</span><a name="line.398"></a> -<span class="sourceLineNo">399</span> /** @return number of KV entries in this HFile */<a name="line.399"></a> -<span class="sourceLineNo">400</span> @Override<a name="line.400"></a> -<span class="sourceLineNo">401</span> public long getEntries() {<a name="line.401"></a> -<span class="sourceLineNo">402</span> return trailer.getEntryCount();<a name="line.402"></a> -<span class="sourceLineNo">403</span> }<a name="line.403"></a> -<span class="sourceLineNo">404</span><a name="line.404"></a> -<span class="sourceLineNo">405</span> /** @return comparator */<a name="line.405"></a> -<span class="sourceLineNo">406</span> @Override<a name="line.406"></a> -<span class="sourceLineNo">407</span> public CellComparator getComparator() {<a name="line.407"></a> -<span class="sourceLineNo">408</span> return comparator;<a name="line.408"></a> -<span class="sourceLineNo">409</span> }<a name="line.409"></a> -<span class="sourceLineNo">410</span><a name="line.410"></a> -<span class="sourceLineNo">411</span> /** @return compression algorithm */<a name="line.411"></a> -<span class="sourceLineNo">412</span> @Override<a name="line.412"></a> -<span class="sourceLineNo">413</span> public Compression.Algorithm getCompressionAlgorithm() {<a name="line.413"></a> -<span class="sourceLineNo">414</span> return compressAlgo;<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> * @return the total heap size of data and meta block indexes in bytes. Does<a name="line.418"></a> -<span class="sourceLineNo">419</span> * not take into account non-root blocks of a multilevel data index.<a name="line.419"></a> -<span class="sourceLineNo">420</span> */<a name="line.420"></a> -<span class="sourceLineNo">421</span> public long indexSize() {<a name="line.421"></a> -<span class="sourceLineNo">422</span> return (dataBlockIndexReader != null ? dataBlockIndexReader.heapSize() : 0)<a name="line.422"></a> -<span class="sourceLineNo">423</span> + ((metaBlockIndexReader != null) ? metaBlockIndexReader.heapSize()<a name="line.423"></a> -<span class="sourceLineNo">424</span> : 0);<a name="line.424"></a> -<span class="sourceLineNo">425</span> }<a name="line.425"></a> -<span class="sourceLineNo">426</span><a name="line.426"></a> -<span class="sourceLineNo">427</span> @Override<a name="line.427"></a> -<span class="sourceLineNo">428</span> public String getName() {<a name="line.428"></a> -<span class="sourceLineNo">429</span> return name;<a name="line.429"></a> -<span class="sourceLineNo">430</span> }<a name="line.430"></a> -<span class="sourceLineNo">431</span><a name="line.431"></a> -<span class="sourceLineNo">432</span> @Override<a name="line.432"></a> -<span class="sourceLineNo">433</span> public HFileBlockIndex.BlockIndexReader getDataBlockIndexReader() {<a name="line.433"></a> -<span class="sourceLineNo">434</span> return dataBlockIndexReader;<a name="line.434"></a> -<span class="sourceLineNo">435</span> }<a name="line.435"></a> -<span class="sourceLineNo">436</span><a name="line.436"></a> -<span class="sourceLineNo">437</span> @Override<a name="line.437"></a> -<span class="sourceLineNo">438</span> public FixedFileTrailer getTrailer() {<a name="line.438"></a> -<span class="sourceLineNo">439</span> return trailer;<a name="line.439"></a> -<span class="sourceLineNo">440</span> }<a name="line.440"></a> -<span class="sourceLineNo">441</span><a name="line.441"></a> -<span class="sourceLineNo">442</span> @Override<a name="line.442"></a> -<span class="sourceLineNo">443</span> public boolean isPrimaryReplicaReader() {<a name="line.443"></a> -<span class="sourceLineNo">444</span> return isPrimaryReplicaReader;<a name="line.444"></a> -<span class="sourceLineNo">445</span> }<a name="line.445"></a> -<span class="sourceLineNo">446</span><a name="line.446"></a> -<span class="sourceLineNo">447</span> @Override<a name="line.447"></a> -<span class="sourceLineNo">448</span> public void setPrimaryReplicaReader(boolean isPrimaryReplicaReader) {<a name="line.448"></a> -<span class="sourceLineNo">449</span> this.isPrimaryReplicaReader = isPrimaryReplicaReader;<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> @Override<a name="line.452"></a> -<span class="sourceLineNo">453</span> public FileInfo loadFileInfo() throws IOException {<a name="line.453"></a> -<span class="sourceLineNo">454</span> return fileInfo;<a name="line.454"></a> -<span class="sourceLineNo">455</span> }<a name="line.455"></a> -<span class="sourceLineNo">456</span><a name="line.456"></a> -<span class="sourceLineNo">457</span> /**<a name="line.457"></a> -<span class="sourceLineNo">458</span> * An exception thrown when an operation requiring a scanner to be seeked<a name="line.458"></a> -<span class="sourceLineNo">459</span> * is invoked on a scanner that is not seeked.<a name="line.459"></a> -<span class="sourceLineNo">460</span> */<a name="line.460"></a> -<span class="sourceLineNo">461</span> @SuppressWarnings("serial")<a name="line.461"></a> -<span class="sourceLineNo">462</span> public static class NotSeekedException extends IllegalStateException {<a name="line.462"></a> -<span class="sourceLineNo">463</span> public NotSeekedException() {<a name="line.463"></a> -<span class="sourceLineNo">464</span> super("Not seeked to a key/value");<a name="line.464"></a> -<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><a name="line.467"></a> -<span class="sourceLineNo">468</span> protected static class HFileScannerImpl implements HFileScanner {<a name="line.468"></a> -<span class="sourceLineNo">469</span> private ByteBuff blockBuffer;<a name="line.469"></a> -<span class="sourceLineNo">470</span> protected final boolean cacheBlocks;<a name="line.470"></a> -<span class="sourceLineNo">471</span> protected final boolean pread;<a name="line.471"></a> -<span class="sourceLineNo">472</span> protected final boolean isCompaction;<a name="line.472"></a> -<span class="sourceLineNo">473</span> private int currKeyLen;<a name="line.473"></a> -<span class="sourceLineNo">474</span> private int currValueLen;<a name="line.474"></a> -<span class="sourceLineNo">475</span> private int currMemstoreTSLen;<a name="line.475"></a> -<span class="sourceLineNo">476</span> private long currMemstoreTS;<a name="line.476"></a> -<span class="sourceLineNo">477</span> // Updated but never read?<a name="line.477"></a> -<span class="sourceLineNo">478</span> protected AtomicInteger blockFetches = new AtomicInteger(0);<a name="line.478"></a> -<span class="sourceLineNo">479</span> protected final HFile.Reader reader;<a name="line.479"></a> -<span class="sourceLineNo">480</span> private int currTagsLen;<a name="line.480"></a> -<span class="sourceLineNo">481</span> // buffer backed keyonlyKV<a name="line.481"></a> -<span class="sourceLineNo">482</span> private ByteBufferedKeyOnlyKeyValue bufBackedKeyOnlyKv = new ByteBufferedKeyOnlyKeyValue();<a name="line.482"></a> -<span class="sourceLineNo">483</span> // A pair for reusing in blockSeek() so that we don't garbage lot of objects<a name="line.483"></a> -<span class="sourceLineNo">484</span> final ObjectIntPair<ByteBuffer> pair = new ObjectIntPair<ByteBuffer>();<a name="line.484"></a> -<span class="sourceLineNo">485</span><a name="line.485"></a> -<span class="sourceLineNo">486</span> /**<a name="line.486"></a> -<span class="sourceLineNo">487</span> * The next indexed key is to keep track of the indexed key of the next data block.<a name="line.487"></a> -<span class="sourceLineNo">488</span> * If the nextIndexedKey is HConstants.NO_NEXT_INDEXED_KEY, it means that the<a name="line.488"></a> -<span class="sourceLineNo">489</span> * current data block is the last data block.<a name="line.489"></a> -<span class="sourceLineNo">490</span> *<a name="line.490"></a> -<span class="sourceLineNo">491</span> * If the nextIndexedKey is null, it means the nextIndexedKey has not been loaded yet.<a name="line.491"></a> -<span class="sourceLineNo">492</span> */<a name="line.492"></a> -<span class="sourceLineNo">493</span> protected Cell nextIndexedKey;<a name="line.493"></a> -<span class="sourceLineNo">494</span> // Current block being used<a name="line.494"></a> -<span class="sourceLineNo">495</span> protected HFileBlock curBlock;<a name="line.495"></a> -<span class="sourceLineNo">496</span> // Previous blocks that were used in the course of the read<a name="line.496"></a> -<span class="sourceLineNo">497</span> protected final ArrayList<HFileBlock> prevBlocks = new ArrayList<HFileBlock>();<a name="line.497"></a> -<span class="sourceLineNo">498</span><a name="line.498"></a> -<span class="sourceLineNo">499</span> public HFileScannerImpl(final HFile.Reader reader, final boolean cacheBlocks,<a name="line.499"></a> -<span class="sourceLineNo">500</span> final boolean pread, final boolean isCompaction) {<a name="line.500"></a> -<span class="sourceLineNo">501</span> this.reader = reader;<a name="line.501"></a> -<span class="sourceLineNo">502</span> this.cacheBlocks = cacheBlocks;<a name="line.502"></a> -<span class="sourceLineNo">503</span> this.pread = pread;<a name="line.503"></a> -<span class="sourceLineNo">504</span> this.isCompaction = isCompaction;<a name="line.504"></a> -<span class="sourceLineNo">505</span> }<a name="line.505"></a> -<span class="sourceLineNo">506</span><a name="line.506"></a> -<span class="sourceLineNo">507</span> void updateCurrBlockRef(HFileBlock block) {<a name="line.507"></a> -<span class="sourceLineNo">508</span> if (block != null && this.curBlock != null &&<a name="line.508"></a> -<span class="sourceLineNo">509</span> block.getOffset() == this.curBlock.getOffset()) {<a name="line.509"></a> -<span class="sourceLineNo">510</span> return;<a name="line.510"></a> -<span class="sourceLineNo">511</span> }<a name="line.511"></a> -<span class="sourceLineNo">512</span> // We don't have to keep ref to EXCLUSIVE type of block<a name="line.512"></a> -<span class="sourceLineNo">513</span> if (this.curBlock != null && this.curBlock.usesSharedMemory()) {<a name="line.513"></a> -<span class="sourceLineNo">514</span> prevBlocks.add(this.curBlock);<a name="line.514"></a> +<span class="sourceLineNo">332</span> private String toStringLastKey() {<a name="line.332"></a> +<span class="sourceLineNo">333</span> return CellUtil.toString(getLastKey(), false);<a name="line.333"></a> +<span class="sourceLineNo">334</span> }<a name="line.334"></a> +<span class="sourceLineNo">335</span><a name="line.335"></a> +<span class="sourceLineNo">336</span> @Override<a name="line.336"></a> +<span class="sourceLineNo">337</span> public String toString() {<a name="line.337"></a> +<span class="sourceLineNo">338</span> return "reader=" + path.toString() +<a name="line.338"></a> +<span class="sourceLineNo">339</span> (!isFileInfoLoaded()? "":<a name="line.339"></a> +<span class="sourceLineNo">340</span> ", compression=" + compressAlgo.getName() +<a name="line.340"></a> +<span class="sourceLineNo">341</span> ", cacheConf=" + cacheConf +<a name="line.341"></a> +<span class="sourceLineNo">342</span> ", firstKey=" + toStringFirstKey() +<a name="line.342"></a> +<span class="sourceLineNo">343</span> ", lastKey=" + toStringLastKey()) +<a name="line.343"></a> +<span class="sourceLineNo">344</span> ", avgKeyLen=" + avgKeyLen +<a name="line.344"></a> +<span class="sourceLineNo">345</span> ", avgValueLen=" + avgValueLen +<a name="line.345"></a> +<span class="sourceLineNo">346</span> ", entries=" + trailer.getEntryCount() +<a name="line.346"></a> +<span class="sourceLineNo">347</span> ", length=" + fileSize;<a name="line.347"></a> +<span class="sourceLineNo">348</span> }<a name="line.348"></a> +<span class="sourceLineNo">349</span><a name="line.349"></a> +<span class="sourceLineNo">350</span> @Override<a name="line.350"></a> +<span class="sourceLineNo">351</span> public long length() {<a name="line.351"></a> +<span class="sourceLineNo">352</span> return fileSize;<a name="line.352"></a> +<span class="sourceLineNo">353</span> }<a name="line.353"></a> +<span class="sourceLineNo">354</span><a name="line.354"></a> +<span class="sourceLineNo">355</span> @Override<a name="line.355"></a> +<span class="sourceLineNo">356</span> public void returnBlock(HFileBlock block) {<a name="line.356"></a> +<span class="sourceLineNo">357</span> BlockCache blockCache = this.cacheConf.getBlockCache();<a name="line.357"></a> +<span class="sourceLineNo">358</span> if (blockCache != null && block != null) {<a name="line.358"></a> +<span class="sourceLineNo">359</span> BlockCacheKey cacheKey = new BlockCacheKey(this.getFileContext().getHFileName(),<a name="line.359"></a> +<span class="sourceLineNo">360</span> block.getOffset(), this.isPrimaryReplicaReader());<a name="line.360"></a> +<span class="sourceLineNo">361</span> blockCache.returnBlock(cacheKey, block);<a name="line.361"></a> +<span class="sourceLineNo">362</span> }<a name="line.362"></a> +<span class="sourceLineNo">363</span> }<a name="line.363"></a> +<span class="sourceLineNo">364</span> /**<a name="line.364"></a> +<span class="sourceLineNo">365</span> * @return the first key in the file. May be null if file has no entries. Note<a name="line.365"></a> +<span class="sourceLineNo">366</span> * that this is not the first row key, but rather the byte form of the<a name="line.366"></a> +<span class="sourceLineNo">367</span> * first KeyValue.<a name="line.367"></a> +<span class="sourceLineNo">368</span> */<a name="line.368"></a> +<span class="sourceLineNo">369</span> @Override<a name="line.369"></a> +<span class="sourceLineNo">370</span> public Cell getFirstKey() {<a name="line.370"></a> +<span class="sourceLineNo">371</span> if (dataBlockIndexReader == null) {<a name="line.371"></a> +<span class="sourceLineNo">372</span> throw new BlockIndexNotLoadedException();<a name="line.372"></a> +<span class="sourceLineNo">373</span> }<a name="line.373"></a> +<span class="sourceLineNo">374</span> return dataBlockIndexReader.isEmpty() ? null<a name="line.374"></a> +<span class="sourceLineNo">375</span> : dataBlockIndexReader.getRootBlockKey(0);<a name="line.375"></a> +<span class="sourceLineNo">376</span> }<a name="line.376"></a> +<span class="sourceLineNo">377</span><a name="line.377"></a> +<span class="sourceLineNo">378</span> /**<a name="line.378"></a> +<span class="sourceLineNo">379</span> * TODO left from {@link HFile} version 1: move this to StoreFile after Ryan's<a name="line.379"></a> +<span class="sourceLineNo">380</span> * patch goes in to eliminate {@link KeyValue} here.<a name="line.380"></a> +<span class="sourceLineNo">381</span> *<a name="line.381"></a> +<span class="sourceLineNo">382</span> * @return the first row key, or null if the file is empty.<a name="line.382"></a> +<span class="sourceLineNo">383</span> */<a name="line.383"></a> +<span class="sourceLineNo">384</span> @Override<a name="line.384"></a> +<span class="sourceLineNo">385</span> public byte[] getFirstRowKey() {<a name="line.385"></a> +<span class="sourceLineNo">386</span> Cell firstKey = getFirstKey();<a name="line.386"></a> +<span class="sourceLineNo">387</span> // We have to copy the row part to form the row key alone<a name="line.387"></a> +<span class="sourceLineNo">388</span> return firstKey == null? null: CellUtil.cloneRow(firstKey);<a name="line.388"></a> +<span class="sourceLineNo">389</span> }<a name="line.389"></a> +<span class="sourceLineNo">390</span><a name="line.390"></a> +<span class="sourceLineNo">391</span> /**<a name="line.391"></a> +<span class="sourceLineNo">392</span> * TODO left from {@link HFile} version 1: move this to StoreFile after<a name="line.392"></a> +<span class="sourceLineNo">393</span> * Ryan's patch goes in to eliminate {@link KeyValue} here.<a name="line.393"></a> +<span class="sourceLineNo">394</span> *<a name="line.394"></a> +<span class="sourceLineNo">395</span> * @return the last row key, or null if the file is empty.<a name="line.395"></a> +<span class="sourceLineNo">396</span> */<a name="line.396"></a> +<span class="sourceLineNo">397</span> @Override<a name="line.397"></a> +<span class="sourceLineNo">398</span> public byte[] getLastRowKey() {<a name="line.398"></a> +<span class="sourceLineNo">399</span> Cell lastKey = getLastKey();<a name="line.399"></a> +<span class="sourceLineNo">400</span> return lastKey == null? null: CellUtil.cloneRow(lastKey);<a name="line.400"></a> +<span class="sourceLineNo">401</span> }<a name="line.401"></a> +<span class="sourceLineNo">402</span><a name="line.402"></a> +<span class="sourceLineNo">403</span> /** @return number of KV entries in this HFile */<a name="line.403"></a> +<span class="sourceLineNo">404</span> @Override<a name="line.404"></a> +<span class="sourceLineNo">405</span> public long getEntries() {<a name="line.405"></a> +<span class="sourceLineNo">406</span> return trailer.getEntryCount();<a name="line.406"></a> +<span class="sourceLineNo">407</span> }<a name="line.407"></a> +<span class="sourceLineNo">408</span><a name="line.408"></a> +<span class="sourceLineNo">409</span> /** @return comparator */<a name="line.409"></a> +<span class="sourceLineNo">410</span> @Override<a name="line.410"></a> +<span class="sourceLineNo">411</span> public CellComparator getComparator() {<a name="line.411"></a> +<span class="sourceLineNo">412</span> return comparator;<a name="line.412"></a> +<span class="sourceLineNo">413</span> }<a name="line.413"></a> +<span class="sourceLineNo">414</span><a name="line.414"></a> +<span class="sourceLineNo">415</span> /** @return compression algorithm */<a name="line.415"></a> +<span class="sourceLineNo">416</span> @Override<a name="line.416"></a> +<span class="sourceLineNo">417</span> public Compression.Algorithm getCompressionAlgorithm() {<a name="line.417"></a> +<span class="sourceLineNo">418</span> return compressAlgo;<a name="line.418"></a> +<span class="sourceLineNo">419</span> }<a name="line.419"></a> +<span class="sourceLineNo">420</span><a name="line.420"></a> +<span class="sourceLineNo">421</span> /**<a name="line.421"></a> +<span class="sourceLineNo">422</span> * @return the total heap size of data and meta block indexes in bytes. Does<a name="line.422"></a> +<span class="sourceLineNo">423</span> * not take into account non-root blocks of a multilevel data index.<a name="line.423"></a> +<span class="sourceLineNo">424</span> */<a name="line.424"></a> +<span class="sourceLineNo">425</span> public long indexSize() {<a name="line.425"></a> +<span class="sourceLineNo">426</span> return (dataBlockIndexReader != null ? dataBlockIndexReader.heapSize() : 0)<a name="line.426"></a> +<span class="sourceLineNo">427</span> + ((metaBlockIndexReader != null) ? metaBlockIndexReader.heapSize()<a name="line.427"></a> +<span class="sourceLineNo">428</span> : 0);<a name="line.428"></a> +<span class="sourceLineNo">429</span> }<a name="line.429"></a> +<span class="sourceLineNo">430</span><a name="line.430"></a> +<span class="sourceLineNo">431</span> @Override<a name="line.431"></a> +<span class="sourceLineNo">432</span> public String getName() {<a name="line.432"></a> +<span class="sourceLineNo">433</span> return name;<a name="line.433"></a> +<span class="sourceLineNo">434</span> }<a name="line.434"></a> +<span class="sourceLineNo">435</span><a name="line.435"></a> +<span class="sourceLineNo">436</span> @Override<a name="line.436"></a> +<span class="sourceLineNo">437</span> public HFileBlockIndex.BlockIndexReader getDataBlockIndexReader() {<a name="line.437"></a> +<span class="sourceLineNo">438</span> return dataBlockIndexReader;<a name="line.438"></a> +<span class="sourceLineNo">439</span> }<a name="line.439"></a> +<span class="sourceLineNo">440</span><a name="line.440"></a> +<span class="sourceLineNo">441</span> @Override<a name="line.441"></a> +<span class="sourceLineNo">442</span> public FixedFileTrailer getTrailer() {<a name="line.442"></a> +<span class="sourceLineNo">443</span> return trailer;<a name="line.443"></a> +<span class="sourceLineNo">444</span> }<a name="line.444"></a> +<span class="sourceLineNo">445</span><a name="line.445"></a> +<span class="sourceLineNo">446</span> @Override<a name="line.446"></a> +<span class="sourceLineNo">447</span> public boolean isPrimaryReplicaReader() {<a name="line.447"></a> +<span class="sourceLineNo">448</span> return isPrimaryReplicaReader;<a name="line.448"></a> +<span class="sourceLineNo">449</span> }<a name="line.449"></a> +<span class="sourceLineNo">450</span><a name="line.450"></a> +<span class="sourceLineNo">451</span> @Override<a name="line.451"></a> +<span class="sourceLineNo">452</span> public void setPrimaryReplicaReader(boolean isPrimaryReplicaReader) {<a name="line.452"></a> +<span class="sourceLineNo">453</span> this.isPrimaryReplicaReader = isPrimaryReplicaReader;<a name="line.453"></a> +<span class="sourceLineNo">454</span> }<a name="line.454"></a> +<span class="sourceLineNo">455</span><a name="line.455"></a> +<span class="sourceLineNo">456</span> @Override<a name="line.456"></a> +<span class="sourceLineNo">457</span> public FileInfo loadFileInfo() throws IOException {<a name="line.457"></a> +<span class="sourceLineNo">458</span> return fileInfo;<a name="line.458"></a> +<span class="sourceLineNo">459</span> }<a name="line.459"></a> +<span class="sourceLineNo">460</span><a name="line.460"></a> +<span class="sourceLineNo">461</span> /**<a name="line.461"></a> +<span class="sourceLineNo">462</span> * An exception thrown when an operation requiring a scanner to be seeked<a name="line.462"></a> +<span class="sourceLineNo">463</span> * is invoked on a scanner that is not seeked.<a name="line.463"></a> +<span class="sourceLineNo">464</span> */<a name="line.464"></a> +<span class="sourceLineNo">465</span> @SuppressWarnings("serial")<a name="line.465"></a> +<span class="sourceLineNo">466</span> public static class NotSeekedException extends IllegalStateException {<a name="line.466"></a> +<span class="sourceLineNo">467</span> public NotSeekedException() {<a name="line.467"></a> +<span class="sourceLineNo">468</span> super("Not seeked to a key/value");<a name="line.468"></a> +<span class="sourceLineNo">469</span> }<a name="line.469"></a> +<span class="sourceLineNo">470</span> }<a name="line.470"></a> +<span class="sourceLineNo">471</span><a name="line.471"></a> +<span class="sourceLineNo">472</span> protected static class HFileScannerImpl implements HFileScanner {<a name="line.472"></a> +<span class="sourceLineNo">473</span> private ByteBuff blockBuffer;<a name="line.473"></a> +<span class="sourceLineNo">474</span> protected final boolean cacheBlocks;<a name="line.474"></a> +<span class="sourceLineNo">475</span> protected final boolean pread;<a name="line.475"></a> +<span class="sourceLineNo">476</span> protected final boolean isCompaction;<a name="line.476"></a> +<span class="sourceLineNo">477</span> private int currKeyLen;<a name="line.477"></a> +<span class="sourceLineNo">478</span> private int currValueLen;<a name="line.478"></a> +<span class="sourceLineNo">479</span> private int currMemstoreTSLen;<a name="line.479"></a> +<span class="sourceLineNo">480</span> private long currMemstoreTS;<a name="line.480"></a> +<span class="sourceLineNo">481</span> // Updated but never read?<a name="line.481"></a> +<span class="sourceLineNo">482</span> protected AtomicInteger blockFetches = new AtomicInteger(0);<a name="line.482"></a> +<span class="sourceLineNo">483</span> protected final HFile.Reader reader;<a name="line.483"></a> +<span class="sourceLineNo">484</span> private int currTagsLen;<a name="line.484"></a> +<span class="sourceLineNo">485</span> // buffer backed keyonlyKV<a name="line.485"></a> +<span class="sourceLineNo">486</span> private ByteBufferedKeyOnlyKeyValue bufBackedKeyOnlyKv = new ByteBufferedKeyOnlyKeyValue();<a name="line.486"></a> +<span class="sourceLineNo">487</span> // A pair for reusing in blockSeek() so that we don't garbage lot of objects<a name="line.487"></a> +<span class="sourceLineNo">488</span> final ObjectIntPair<ByteBuffer> pair = new ObjectIntPair<ByteBuffer>();<a name="line.488"></a> +<span class="sourceLineNo">489</span><a name="line.489"></a> +<span class="sourceLineNo">490</span> /**<a name="line.490"></a> +<span class="sourceLineNo">491</span> * The next indexed key is to keep track of the indexed key of the next data block.<a name="line.491"></a> +<span class="sourceLineNo">492</span> * If the nextIndexedKey is HConstants.NO_NEXT_INDEXED_KEY, it means that the<a name="line.492"></a> +<span class="sourceLineNo">493</span> * current data block is the last data block.<a name="line.493"></a> +<span class="sourceLineNo">494</span> *<a name="line.494"></a> +<span class="sourceLineNo">495</span> * If the nextIndexedKey is null, it means the nextIndexedKey has not been loaded yet.<a name="line.495"></a> +<span class="sourceLineNo">496</span> */<a name="line.496"></a> +<span class="sourceLineNo">497</span> protected Cell nextIndexedKey;<a name="line.497"></a> +<span class="sourceLineNo">498</span> // Current block being used<a name="line.498"></a> +<span class="sourceLineNo">499</span> protected HFileBlock curBlock;<a name="line.499"></a> +<span class="sourceLineNo">500</span> // Previous blocks that were used in the course of the read<a name="line.500"></a> +<span class="sourceLineNo">501</span> protected final ArrayList<HFileBlock> prevBlocks = new ArrayList<HFileBlock>();<a name="line.501"></a> +<span class="sourceLineNo">502</span><a name="line.502"></a> +<span class="sourceLineNo">503</span> public HFileScannerImpl(final HFile.Reader reader, final boolean cacheBlocks,<a name="line.503"></a> +<span class="sourceLineNo">504</span> final boolean pread, final boolean isCompaction) {<a name="line.504"></a> +<span class="sourceLineNo">505</span> this.reader = reader;<a name="line.505"></a> +<span class="sourceLineNo">506</span> this.cacheBlocks = cacheBlocks;<a name="line.506"></a> +<span class="sourceLineNo">507</span> this.pread = pread;<a name="line.507"></a> +<span class="sourceLineNo">508</span> this.isCompaction = isCompaction;<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> +<span class="sourceLineNo">511</span> void updateCurrBlockRef(HFileBlock block) {<a name="line.511"></a> +<span class="sourceLineNo">512</span> if (block != null && this.curBlock != null &&<a name="line.512"></a> +<span class="sourceLineNo">513</span> block.getOffset() == this.curBlock.getOffset()) {<a name="line.513"></a> +<span class="sourceLineNo">514</span> return;<a name="line.514"></a> <span class="sourceLineNo">515</span> }<a name="line.515"></a> -<span class="sourceLineNo">516</span> this.curBlock = block;<a name="line.516"></a> -<span class="sourceLineNo">517</span> }<a name="line.517"></a> -<span class="sourceLineNo">518</span><a name="line.518"></a> -<span class="sourceLineNo">519</span> void reset() {<a name="line.519"></a> -<span class="sourceLineNo">520</span> // We don't have to keep ref to EXCLUSIVE type of block<a name="line.520"></a> -<span class="sourceLineNo">521</span> if (this.curBlock != null && this.curBlock.usesSharedMemory()) {<a name="line.521"></a> -<span class="sourceLineNo">522</span> this.prevBlocks.add(this.curBlock);<a name="line.522"></a> -<span class="sourceLineNo">523</span> }<a name="line.523"></a> -<span class="sourceLineNo">524</span> this.curBlock = null;<a name="line.524"></a> -<span class="sourceLineNo">525</span> }<a name="line.525"></a> -<span class="sourceLineNo">526</span><a name="line.526"></a> -<span class="sourceLineNo">527</span> private void returnBlockToCache(HFileBlock block) {<a name="line.527"></a> -<span class="sourceLineNo">528</span> if (LOG.isTraceEnabled()) {<a name="line.528"></a> -<span class="sourceLineNo">529</span> LOG.trace("Returning the block : " + block);<a name="line.529"></a> -<span class="sourceLineNo">530</span> }<a name="line.530"></a> -<span class="sourceLineNo">531</span> this.reader.returnBlock(block);<a name="line.531"></a> -<span class="sourceLineNo">532</span> }<a name="line.532"></a> -<span class="sourceLineNo">533</span><a name="line.533"></a> -<span class="sourceLineNo">534</span> private void returnBlocks(boolean returnAll) {<a name="line.534"></a> -<span class="sourceLineNo">535</span> for (int i = 0; i < this.prevBlocks.size(); i++) {<a name="line.535"></a> -<span class="sourceLineNo">536</span> returnBlockToCache(this.prevBlocks.get(i));<a name="line.536"></a> -<span class="sourceLineNo">537</span> }<a name="line.537"></a> -<span class="sourceLineNo">538</span> this.prevBlocks.clear();<a name="line.538"></a> -<span class="sourceLineNo">539</span> if (returnAll && this.curBlock != null) {<a name="line.539"></a> -<span class="sourceLineNo">540</span> returnBlockToCache(this.curBlock);<a name="line.540"></a> -<span class="sourceLineNo">541</span> this.curBlock = null;<a name="line.541"></a> -<span class="sourceLineNo">542</span> }<a name="line.542"></a> -<span class="sourceLineNo">543</span> }<a name="line.543"></a> -<span class="sourceLineNo">544</span> @Override<a name="line.544"></a> -<span class="sourceLineNo">545</span> public boolean isSeeked(){<a name="line.545"></a> -<span class="sourceLineNo">546</span> return blockBuffer != null;<a name="line.546"></a> +<span class="sourceLineNo">516</span> // We don't have to keep ref to EXCLUSIVE type of block<a name="line.516"></a> +<span class="sourceLineNo">517</span> if (this.curBlock != null && this.curBlock.usesSharedMemory()) {<a name="line.517"></a> +<span class="sourceLineNo">518</span> prevBlocks.add(this.curBlock);<a name="line.518"></a> +<span class="sourceLineNo">519</span> }<a name="line.519"></a> +<span class="sourceLineNo">520</span> this.curBlock = block;<a name="line.520"></a> +<span class="sourceLineNo">521</span> }<a name="line.521"></a> +<span class="sourceLineNo">522</span><a name="line.522"></a> +<span class="sourceLineNo">523</span> void reset() {<a name="line.523"></a> +<span class="sourceLineNo">524</span> // We don't have to keep ref to EXCLUSIVE type of block<a name="line.524"></a> +<span class="sourceLineNo">525</span> if (this.curBlock != null && this.curBlock.usesSharedMemory()) {<a name="line.525"></a> +<span class="sourceLineNo">526</span> this.prevBlocks.add(this.curBlock);<a name="line.526"></a> +<span class="sourceLineNo">527</span> }<a name="line.527"></a> +<span class="sourceLineNo">528</span> this.curBlock = null;<a name="line.528"></a> +<span class="sourceLineNo">529</span> }<a name="line.529"></a> +<span class="sourceLineNo">530</span><a name="line.530"></a> +<span class="sourceLineNo">531</span> private void returnBlockToCache(HFileBlock block) {<a name="line.531"></a> +<span class="sourceLineNo">532</span> if (LOG.isTraceEnabled()) {<a name="line.532"></a> +<span class="sourceLineNo">533</span> LOG.trace("Returning the block : " + block);<a name="line.533"></a> +<span class="sourceLineNo">534</span> }<a name="line.534"></a> +<span class="sourceLineNo">535</span> this.reader.returnBlock(block);<a name="line.535"></a> +<span class="sourceLineNo">536</span> }<a name="line.536"></a> +<span class="sourceLineNo">537</span><a name="line.537"></a> +<span class="sourceLineNo">538</span> private void returnBlocks(boolean returnAll) {<a name="line.538"></a> +<span class="sourceLineNo">539</span> for (int i = 0; i < this.prevBlocks.size(); i++) {<a name="line.539"></a> +<span class="sourceLineNo">540</span> returnBlockToCache(this.prevBlocks.get(i));<a name="line.540"></a> +<span class="sourceLineNo">541</span> }<a name="line.541"></a> +<span class="sourceLineNo">542</span> this.prevBlocks.clear();<a name="line.542"></a> +<span class="sourceLineNo">543</span> if (returnAll && this.curBlock != null) {<a name="line.543"></a> +<span class="sourceLineNo">544</span> returnBlockToCache(this.curBlock);<a name="line.544"></a> +<span class="sourceLineNo">545</span> this.curBlock = null;<a name="line.545"></a> +<span class="sourceLineNo">546</span> }<a name="line.546"></a> <span class="sourceLineNo">547</span> }<a name="line.547"></a> -<span class="sourceLineNo">548</span><a name="line.548"></a> -<span class="sourceLineNo">549</span> @Override<a name="line.549"></a> -<span class="sourceLineNo">550</span> public String toString() {<a name="line.550"></a> -<span class="sourceLineNo">551</span> return "HFileScanner for reader " + String.valueOf(getReader());<a name="line.551"></a> -<span class="sourceLineNo">552</span> }<a name="line.552"></a> -<span class="sourceLineNo">553</span><a name="line.553"></a> -<span class="sourceLineNo">554</span> protected void assertSeeked() {<a name="line.554"></a> -<span class="sourceLineNo">555</span> if (!isSeeked())<a name="line.555"></a> -<span class="sourceLineNo">556</span> throw new NotSeekedException();<a name="line.556"></a> -<span class="sourceLineNo">557</span> }<a name="line.557"></a> -<span class="sourceLineNo">558</span><a name="line.558"></a> -<span class="sourceLineNo">559</span> @Override<a name="line.559"></a> -<span class="sourceLineNo">560</span> public HFile.Reader getReader() {<a name="line.560"></a> -<span class="sourceLineNo">561</span> return reader;<a name="line.561"></a> -<span class="sourceLineNo">562</span> }<a name="line.562"></a> -<span class="sourceLineNo">563</span><a name="line.563"></a> -<span class="sourceLineNo">564</span> protected int getCellBufSize() {<a name="line.564"></a> -<span class="sourceLineNo">565</span> int kvBufSize = KEY_VALUE_LEN_SIZE + currKeyLen + currValueLen;<a name="line.565"></a> -<span class="sourceLineNo">566</span> if (this.reader.getFileContext().isIncludesTags()) {<a name="line.566"></a> -<span class="sourceLineNo">567</span> kvBufSize += Bytes.SIZEOF_SHORT + currTagsLen;<a name="line.567"></a> -<span class="sourceLineNo">568</span> }<a name="line.568"></a> -<span class="sourceLineNo">569</span> return kvBufSize;<a name="line.569"></a> -<span class="sourceLineNo">570</span> }<a name="line.570"></a> -<span class="sourceLineNo">571</span><a name="line.571"></a> -<span class="sourceLineNo">572</span> @Override<a name="line.572"></a> -<span class="sourceLineNo">573</span> public void close() {<a name="line.573"></a> -<span class="sourceLineNo">574</span> this.returnBlocks(true);<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> protected int getCurCellSize() {<a name="line.577"></a> -<span class="sourceLineNo">578</span> int curCellSize = KEY_VALUE_LEN_SIZE + currKeyLen + currValueLen<a name="line.578"></a> -<span class="sourceLineNo">579</span> + currMemstoreTSLen;<a name="line.579"></a> -<span class="sourceLineNo">580</span> if (this.reader.getFileContext().isIncludesTags()) {<a name="line.580"></a> -<span class="sourceLineNo">581</span> curCellSize += Bytes.SIZEOF_SHORT + currTagsLen;<a name="line.581"></a> -<span class="sourceLineNo">582</span> }<a name="line.582"></a> -<span class="sourceLineNo">583</span> return curCellSize;<a name="line.583"></a> -<span class="sourceLineNo">584</span> }<a name="line.584"></a> -<span class="sourceLineNo">585</span><a name="line.585"></a> -<span class="sourceLineNo">586</span> protected void readKeyValueLen() {<a name="line.586"></a> -<span class="sourceLineNo">587</span> // This is a hot method. We go out of our way to make this method short so it can be<a name="line.587"></a> -<span class="sourceLineNo">588</span> // inlined and is not too big to compile. We also manage position in ByteBuffer ourselves<a name="line.588"></a> -<span class="sourceLineNo">589</span> // because it is faster than going via range-checked ByteBuffer methods or going through a<a name="line.589"></a> -<span class="sourceLineNo">590</span> // byte buffer array a byte at a time.<a name="line.590"></a> -<span class="sourceLineNo">591</span> // Get a long at a time rather than read two individual ints. In micro-benchmarking, even<a name="line.591"></a> -<span class="sourceLineNo">592</span> // with the extra bit-fiddling, this is order-of-magnitude faster than getting two ints.<a name="line.592"></a> -<span class="sourceLineNo">593</span> // Trying to imitate what was done - need to profile if this is better or<a name="line.593"></a> -<span class="sourceLineNo">594</span> // earlier way is better by doing mark and reset?<a name="line.594"></a> -<span class="sourceLineNo">595</span> // But ensure that you read long instead of two ints<a name="line.595"></a> -<span class="sourceLineNo">596</span> long ll = blockBuffer.getLongAfterPosition(0);<a name="line.596"></a> -<span class="sourceLineNo">597</span> // Read top half as an int of key length and bottom int as value length<a name="line.597"></a> -<span class="sourceLineNo">598</span> this.currKeyLen = (int)(ll >> Integer.SIZE);<a name="line.598"></a> -<span class="sourceLineNo">599</span> this.currValueLen = (int)(Bytes.MASK_FOR_LOWER_INT_IN_LONG ^ ll);<a name="line.599"></a> -<span class="sourceLineNo">600</span> checkKeyValueLen();<a name="line.600"></a> -<span class="sourceLineNo">601</span> // Move position past the key and value lengths and then beyond the key and value<a name="line.601"></a> -<span class="sourceLineNo">602</span> int p = (Bytes.SIZEOF_LONG + currKeyLen + currValueLen);<a name="line.602"></a> -<span class="sourceLineNo">603</span> if (reader.getFileContext().isIncludesTags()) {<a name="line.603"></a> -<span class="sourceLineNo">604</span> // Tags length is a short.<a name="line.604"></a> -<span class="sourceLineNo">605</span> this.currTagsLen = blockBuffer.getShortAfterPosition(p);<a name="line.605"></a> -<span class="sourceLineNo">606</span> checkTagsLen();<a name="line.606"></a> -<span class="sourceLineNo">607</span> p += (Bytes.SIZEOF_SHORT + currTagsLen);<a name="line.607"></a> -<span class="sourceLineNo">608</span> }<a name="line.608"></a> -<span class="sourceLineNo">609</span> readMvccVersion(p);<a name="line.609"></a> -<span class="sourceLineNo">610</span> }<a name="line.610"></a> -<span class="sourceLineNo">611</span><a name="line.611"></a> -<span class="sourceLineNo">612</span> private final void checkTagsLen() {<a name="line.612"></a> -<span class="sourceLineNo">613</span> if (checkLen(this.currTagsLen)) {<a name="line.613"></a> -<span class="sourceLineNo">614</span> throw new IllegalStateException("Invalid currTagsLen " + this.currTagsLen +<a name="line.614"></a> -<span class="sourceLineNo">615</span> ". Block offset: " + curBlock.getOffset() + ", block length: " +<a name="line.615"></a> -<span class="sourceLineNo">616</span> this.blockBuffer.limit() +<a name="line.616"></a> -<span class="sourceLineNo">617</span> ", position: " + this.blockBuffer.position() + " (without header).");<a name="line.617"></a> -<span class="sourceLineNo">618</span> }<a name="line.618"></a> -<span class="sourceLineNo">619</span> }<a name="line.619"></a> -<span class="sourceLineNo">620</span><a name="line.620"></a> -<span class="sourceLineNo">621</span> /**<a name="line.621"></a> -<span class="sourceLineNo">622</span> * Read mvcc. Does checks to see if we even need to read the mvcc at all.<a name="line.622"></a> -<span class="sourceLineNo">623</span> * @param offsetFromPos<a name="line.623"></a> -<span class="sourceLineNo">624</span> */<a name="line.624"></a> -<span class="sourceLineNo">625</span> protected void readMvccVersion(final int offsetFromPos) {<a name="line.625"></a> -<span class="sourceLineNo">626</span> // See if we even need to decode mvcc.<a name="line.626"></a> -<span class="sourceLineNo">627</span> if (!this.reader.shouldIncludeMemstoreTS()) return;<a name="line.627"></a> -<span class="sourceLineNo">628</span> if (!this.reader.isDecodeMemstoreTS()) {<a name="line.628"></a> -<span class="sourceLineNo">629</span> currMemstoreTS = 0;<a name="line.629"></a> -<span class="sourceLineNo">630</span> currMemstoreTSLen = 1;<a name="line.630"></a> -<span class="sourceLineNo">631</span> return;<a name="line.631"></a> -<span class="sourceLineNo">632</span> }<a name="line.632"></a> -<span class="sourceLineNo">633</span> _readMvccVersion(offsetFromPos);<a name="line.633"></a> -<span class="sourceLineNo">634</span> }<a name="line.634"></a> -<span class="sourceLineNo">635</span><a name="line.635"></a> -<span class="sourceLineNo">636</span> /**<a name="line.636"></a> -<span class="sourceLineNo">637</span> * Actually do the mvcc read. Does no checks.<a name="line.637"></a> -<span class="sourceLineNo">638</span> * @param offsetFromPos<a name="line.638"></a> -<span class="sourceLineNo">639</span> */<a name="line.639"></a> -<span class="sourceLineNo">640</span> private void _readMvccVersion(int offsetFromPos) {<a name="line.640"></a> -<span class="sourceLineNo">641</span> // This is Bytes#bytesToVint inlined so can save a few instructions in this hot method; i.e.<a name="line.641"></a> -<span class="sourceLineNo">642</span> // previous if one-byte vint, we'd redo the vint call to find int size.<a name="line.642"></a> -<span class="sourceLineNo">643</span> // Also the method is kept small so can be inlined.<a name="line.643"></a> -<span class="sourceLineNo">644</span> byte firstByte = blockBuffer.getByteAfterPosition(offsetFromPos);<a name="line.644"></a> -<span class="sourceLineNo">645</span> int len = WritableUtils.decodeVIntSize(firstByte);<a name="line.645"></a> -<span class="sourceLineNo">646</span> if (len == 1) {<a name="line.646"></a> -<span class="sourceLineNo">647</span> this.currMemstoreTS = firstByte;<a name="line.647"></a> -<span class="sourceLineNo">648</span> } else {<a name="line.648"></a> -<span class="sourceLineNo">649</span> int remaining = len -1;<a name="line.649"></a> -<span class="sourceLineNo">650</span> long i = 0;<a name="line.650"></a> -<span class="sourceLineNo">651</span> offsetFromPos++;<a name="line.651"></a> -<span class="sourceLineNo">652</span> if (remaining >= Bytes.SIZEOF_INT) {<a name="line.652"></a> -<span class="sourceLineNo">653</span> i = blockBuffer.getIntAfterPosition(offsetFromPos);<a name="line.653"></a> -<span class="sourceLineNo">654</span> remaining -= Bytes.SIZEOF_INT;<a name="line.654"></a> -<span class="sourceLineNo">655</span> offsetFromPos += Bytes.SIZEOF_INT;<a name="line.655"></a> -<span class="sourceLineNo">656</span> }<a name="line.656"></a> -<span class="sourceLineNo">657</span> if (remaining >= Bytes.SIZEOF_SHORT) {<a name="line.657"></a> -<span class="sourceLineNo">658</span> short s = blockBuffer.getShortAfterPosition(offsetFromPos);<a name="line.658"></a> -<span class="sourceLineNo">659</span> i = i << 16;<a name="line.659"></a> -<span class="sourceLineNo">660</span> i = i | (s & 0xFFFF);<a name="line.660"></a> -<span class="sourceLineNo">661</span> remaining -= Bytes.SIZEOF_SHORT;<a name="line.661"></a> -<span class="sourceLineNo">662</span> offsetFromPos += Bytes.SIZEOF_SHORT;<a name="line.662"></a> -<span class="sourceLineNo">663</span> }<a name="line.663"></a> -<span class="sourceLineNo">664</span> for (int idx = 0; idx < remaining; idx++) {<a name="line.664"></a> -<span class="sourceLineNo">665</span> byte b = blockBuffer.getByteAfterPosition(offsetFromPos + idx);<a name="line.665"></a> -<span class="sourceLineNo">666</span> i = i << 8;<a name="line.666"></a> -<span class="sourceLineNo">667</span> i = i | (b & 0xFF);<a name="line.667"></a> -<span class="sourceLineNo">668</span> }<a name="line.668"></a> -<span class="sourceLineNo">669</span> currMemstoreTS = (WritableUtils.isNegativeVInt(firstByte) ? ~i : i);<a name="line.669"></a> -<span class="sourceLineNo">670</span> }<a name="line.670"></a> -<span class="sourceLineNo">671</span> this.currMemstoreTSLen = len;<a name="line.671"></a> -<span class="sourceLineNo">672</span> }<a name="line.672"></a> -<span class="sourceLineNo">673</span><a name="line.673"></a> -<span class="sourceLineNo">674</span> /**<a name="line.674"></a> -<span class="sourceLineNo">675</span> * Within a loaded block, seek looking for the last key that is smaller than<a name="line.675"></a> -<span class="sourceLineNo">676</span> * (or equal to?) the key we are interested in.<a name="line.676"></a> -<span class="sourceLineNo">677</span> * A note on the seekBefore: if you have seekBefore = true, AND the first<a name="line.677"></a> -<span class="sourceLineNo">678</span> * key in the block = key, then you'll get thrown exceptions. The caller has<a name="line.678"></a> -<span class="sourceLineNo">679</span> * to check for that case and load the previous block as appropriate.<a name="line.679"></a> -<span class="sourceLineNo">680</span> * @param key<a name="line.680"></a> -<span class="sourceLineNo">681</span> * the key to find<a name="line.681"></a> -<span class="sourceLineNo">682</span> * @param seekBefore<a name="line.682"></a> -<span class="sourceLineNo">683</span> * find the key before the given key in case of exact match.<a name="line.683"></a> -<span class="sourceLineNo">684</span> * @return 0 in case of an exact key match, 1 in case of an inexact match,<a name="line.684"></a> -<span class="sourceLineNo">685</span> * -2 in case of an inexact match and furthermore, the input key<a name="line.685"></a> -<span class="sourceLineNo">686</span> * less than the first key of current block(e.g. using a faked index<a name="line.686"></a> -<span class="sourceLineNo">687</span> * key)<a name="line.687"></a> -<span class="sourceLineNo">688</span> */<a name="line.688"></a> -<span class="sourceLineNo">689</span> protected int blockSeek(Cell key, boolean seekBefore) {<a name="line.689"></a> -<span class="sourceLineNo">690</span> int klen, vlen, tlen = 0;<a name="line.690"></a> -<span class="sourceLineNo">691</span> int lastKeyValueSize = -1;<a name="line.691"></a> -<span class="sourceLineNo">692</span> int offsetFromPos;<a name="line.692"></a> -<span class="sourceLineNo">693</span> do {<a name="line.693"></a> -<span class="sourceLineNo">694</span> offsetFromPos = 0;<a name="line.694"></a> -<span class="sourceLineNo">695</span> // Better to ensure that we use the BB Utils here<a name="line.695"></a> -<span class="sourceLineNo">696</span> long ll = blockBuffer.getLongAfterPosition(offsetFromPos);<a name="line.696"></a> -<span class="sourceLineNo">697</span> klen = (int)(ll >> Integer.SIZE);<a name="line.697"></a> -<span class="sourceLineNo">698</span> vlen = (int)(Bytes.MASK_FOR_LOWER_INT_IN_LONG ^ ll);<a name="line.698"></a> -<span class="sourceLineNo">699</span> if (klen < 0 || vlen < 0 || klen > blockBuffer.limit()<a name="line.699"></a> -<span class="sourceLineNo">700</span> || vlen > blockBuffer.limit()) {<a name="line.700"></a> -<span class="sourceLineNo">701</span> throw new IllegalStateException("Invalid klen " + klen + " or vlen "<a name="line.701"></a> -<span class="sourceLineNo">702</span> + vlen + ". Block offset: "<a name="line.702"></a> -<span class="sourceLineNo">703</span> + curBlock.getOffset() + ", block length: " + blockBuffer.limit() + ", position: "<a name="line.703"></a> -<span class="sourceLineNo">704</span> + blockBuffer.position() + " (without header).");<a name="line.704"></a> -<span class="sourceLineNo">705</span> }<a name="line.705"></a> -<span class="sourceLineNo">706</span> offsetFromPos += Bytes.SIZEOF_LONG;<a name="line.706"></a> -<span class="sourceLineNo">707</span> blockBuffer.asSubByteBuffer(blockBuffer.position() + offsetFromPos, klen, pair);<a name="line.707"></a> -<span class="sourceLineNo">708</span> bufBackedKeyOnlyKv.setKey(pair.getFirst(), pair.getSecond(), klen);<a name="line.708"></a> -<span class="sourceLineNo">709</span> int comp = reader.getComparator().compareKeyIgnoresMvcc(key, bufBackedKeyOnlyKv);<a name="line.709"></a> -<span class="sourceLineNo">710</span> offsetFromPos += klen + vlen;<a name="line.710"></a> -<span class="sourceLineNo">711</span> if (this.reader.getFileContext().isIncludesTags()) {<a name="line.711"></a> -<span class="sourceLineNo">712</span> // Read short as unsigned, high byte first<a name="line.712"></a> -<span class="sourceLineNo">713</span> tlen = ((blockBuffer.getByteAfterPosition(offsetFromPos) & 0xff) << 8)<a name="line.713"></a> -<span class="sourceLineNo">714</span> ^ (blockBuffer.getByteAfterPosition(offsetFromPos + 1) & 0xff);<a name="line.714"></a> -<span class="sourceLineNo">715</span> if (tlen < 0 || tlen > blockBuffer.limit()) {<a name="line.715"></a> -<span class="sourceLineNo">716</span> throw new IllegalStateException("Invalid tlen " + tlen + ". Block offset: "<a name="line.716"></a> -<span class="sourceLineNo">717</span> + curBlock.getOffset() + ", block length: " + blockBuffer.limit() + ", position: "<a name="line.717"></a> -<span class="sourceLineNo">718</span> + blockBuffer.position() + " (without header).");<a name="line.718"></a> -<span class="sourceLineNo">719</span> }<a name="line.719"></a> -<span class="sourceLineNo">720</span> // add the two bytes read for the tags.<a name="line.720"></a> -<span class="sourceLineNo">721</span> offsetFromPos += tlen + (Bytes.SIZEOF_SHORT);<a name="line.721"></a> -<span class="sourceLineNo">722</span> }<a name="line.722"></a> -<span class="sourceLineNo">723</span> if (this.reader.shouldIncludeMemstoreTS()) {<a name="line.723"></a> -<span class="sourceLineNo">724</span> // Directly read the mvcc based on current position<a name="line.724"></a> -<span class="sourceLineNo">725</span> readMvccVersion(offsetFromPos);<a name="line.725"></a> +<span class="sourceLineNo">548</span> @Override<a name="line.548"></a> +<span class="sourceLineNo">549</span> public boolean isSeeked(){<a name="line.549"></a> +<span class="sourceLineNo">550</span> return blockBuffer != null;<a name="line.550"></a> +<span class="sourceLineNo">551</span> }<a name="line.551"></a> +<span class="sourceLineNo">552</span><a name="line.552"></a> +<span class="sourceLineNo">553</span> @Override<a name="line.553"></a> +<span class="sourceLineNo">554</span> public String toString() {<a name="line.554"></a> +<span class="sourceLineNo">555</span> return "HFileScanner for reader " + String.valueOf(getReader());<a name="line.555"></a> +<span class="sourceLineNo">556</span> }<a name="line.556"></a> +<span class="sourceLineNo">557</span><a name="line.557"></a> +<span class="sourceLineNo">558</span> protected void assertSeeked() {<a name="line.558"></a> +<span class="sourceLineNo">559</span> if (!isSeeked())<a name="line.559"></a> +<span class="sourceLineNo">560</span> throw new NotSeekedException();<a name="line.560"></a> +<span class="sourceLineNo">561</span> }<a name="line.561"></a> +<span class="sourceLineNo">562</span><a name="line.562"></a> +<span class="sourceLineNo">563</span> @Override<a name="line.563"></a> +<span class="sourceLineNo">564</span> public HFile.Reader getReader() {<a name="line.564"></a> +<span class="sourceLineNo">565</span> return reader;<a name="line.565"></a> +<span class="sourceLineNo">566</span> }<a name="line.566"></a> +<span class="sourceLineNo">567</span><a name="line.567"></a> +<span class="sourceLineNo">568</span> protected int getCellBufSize() {<a name="line.568"></a> +<span class="sourceLineNo">569</span> int kvBufSize = KEY_VALUE_LEN_SIZE + currKeyLen + currValueLen;<a name="line.569"></a> +<span class="sourceLineNo">570</span> if (this.reader.getFileContext().isIncludesTags()) {<a name="line.570"></a> +<span class="sourceLineNo">571</span> kvBufSize += Bytes.SIZEOF_SHORT + currTagsLen;<a name="line.571"></a> +<span class="sourceLineNo">572</span> }<a name="line.572"></a> +<span class="sourceLineNo">573</span> return kvBufSize;<a name="line.573"></a> +<span class="sourceLineNo">574</span> }<a name="line.574"></a> +<span class="sourceLineNo">575</span><a name="line.575"></a> +<span class="sourceLineNo">576</span> @Override<a name="line.576"></a> +<span class="sourceLineNo">577</span> public void close() {<a name="line.577"></a> +<span class="sourceLineNo">578</span> this.returnBlocks(true);<a name="line.578"></a> +<span class="sourceLineNo">579</span> }<a name="line.579"></a> +<span class="sourceLineNo">580</span><a name="line.580"></a> +<span class="sourceLineNo">581</span> protected int getCurCellSize() {<a name="line.581"></a> +<span class="sourceLineNo">582</span> int curCellSize = KEY_VALUE_LEN_SIZE + currKeyLen + currValueLen<a name="line.582"></a> +<span class="sourceLineNo">583</span> + currMemstoreTSLen;<a name="line.583"></a> +<span class="sourceLineNo">584</span> if (this.reader.getFileContext().isIncludesTags()) {<a name="line.584"></a> +<span class="sourceLineNo">585</span> curCellSize += Bytes.SIZEOF_SHORT + currTagsLen;<a name="line.585"></a> +<span class="sourceLineNo">586</span> }<a name="line.586"></a> +<span class="sourceLineNo">587</span> return curCellSize;<a name="line.587"></a> +<span class="sourceLineNo">588</span> }<a name="line.588"></a> +<span class="sourceLineNo">589</span><a name="line.589"></a> +<span class="sourceLineNo">590</span> protected void readKeyValueLen() {<a name="line.590"></a> +<span class="sourceLineNo">591</span> // This is a hot method. We go out of our way to make this method short so it can be<a name="line.591"></a> +<span class="sourceLineNo">592</span> // inlined and is not too big to compile. We also manage position in ByteBuffer ourselves<a name="line.592"></a> +<span class="sourceLineNo">593</span> // because it is faster than going via range-checked ByteBuffer methods or going through a<a name="line.593"></a> +<span class="sourceLineNo">594</span> // byte buffer array a byte at a time.<a name="line.594"></a> +<span class="sourceLineNo">595</span> // Get a long at a time rather than read two individual ints. In micro-benchmarking, even<a name="line.595"></a> +<span class="sourceLineNo">596</span> // with the extra bit-fiddling, this is order-of-magnitude faster than getting two ints.<a name="line.596"></a> +<span class="sourceLineNo">597</span> // Trying to imitate what was done - need to profile if this is better or<a name="line.597"></a> +<span class="sourceLineNo">598</span> // earlier way is better by doing mark and reset?<a name="line.598"></a> +<span class="sourceLineNo">599</span> // But ensure that you read long instead of two ints<a name="line.599"></a> +<span class="sourceLineNo">600</span> long ll = blockBuffer.getLongAfterPosition(0);<a name="line.600"></a> +<span class="sourceLineNo">601</span> // Read top half as an int of key length and bottom int as value length<a name="line.601"></a> +<span class="sourceLineNo">602</span> this.currKeyLen = (int)(ll >> Integer.SIZE);<a name="line.602"></a> +<span class="sourceLineNo">603</span> this.currValueLen = (int)(Bytes.MASK_FOR_LOWER_INT_IN_LONG ^ ll);<a name="line.603"></a> +<span class="sourceLineNo">604</span> checkKeyValueLen();<a name="line.604"></a> +<span class="sourceLineNo">605</span> // Move position past the key and value lengths and then beyond the key and value<a name="line.605"></a> +<span class="sourceLineNo">606</span> int p = (Bytes.SIZEOF_LONG + currKeyLen + currValueLen);<a name="line.606"></a> +<span class="sourceLineNo">607</span> if (reader.getFileContext().isIncludesTags()) {<a name="line.607"></a> +<span class="sourceLineNo">608</span> // Tags length is a short.<a name="line.608"></a> +<span class="sourceLineNo">609</span> this.currTagsLen = blockBuffer.getShortAfterPosition(p);<a name="line.609"></a> +<span class="sourceLineNo">610</span> checkTagsLen();<a name="line.610"></a> +<span class="sourceLineNo">611</span> p += (Bytes.SIZEOF_SHORT + currTagsLen);<a name="line.611"></a> +<span class="sourceLineNo">612</span> }<a name="line.612"></a> +<span class="sourceLineNo">613</span> readMvccVersion(p);<a name="line.613"></a> +<span class="sourceLineNo">614</span> }<a name="line.614"></a> +<span class="sourceLineNo">615</span><a name="line.615"></a> +<span class="sourceLineNo">616</span> private final void checkTagsLen() {<a name="line.616"></a> +<span class="sourceLineNo">617</span> if (checkLen(this.currTagsLen)) {<a name="line.617"></a> +<span class="sourceLineNo">618</span> throw new IllegalStateException("Invalid currTagsLen " + this.currTagsLen +<a name="line.618"></a> +<span class="sourceLineNo">619</span> ". Block offset: " + curBlock.getOffset() + ", block length: " +<a name="line.619"></a> +<span class="sourceLineNo">620</span> this.blockBuffer.limit() +<a name="line.620"></a> +<span class="sourceLineNo">621</span> ", position: " + this.blockBuffer.position() + " (without header).");<a name="line.621"></a> +<span class="sourceLineNo">622</span> }<a name="line.622"></a> +<span class="sourceLineNo">623</span> }<a name="line.623"></a> +<span class="sourceLineNo">624</span><a name="line.624"></a> +<span class="sourceLineNo">625</span> /**<a name="line.625"></a> +<span class="sourceLineNo">626</span> * Read mvcc. Does checks to see if we even need to read the mvcc at all.<a name="line.626"></a> +<span class="sourceLineNo">627</span> * @param offsetFromPos<a name="line.627"></a> +<span class="sourceLineNo">628</span> */<a name="line.628"></a> +<span class="sourceLineNo">629</span> protected void readMvccVersion(final int offsetFromPos) {<a name="line.629"></a> +<span class="sourceLineNo">630</span> // See if we even need to decode mvcc.<a name="line.630"></a> +<span class="sourceLineNo">631</span> if (!this.reader.shouldIncludeMemstoreTS()) return;<a name="line.631"></a> +<span class="sourceLineNo">632</span> if (!this.reader.isDecodeMemstoreTS()) {<a name="line.632"></a> +<span class="sourceLineNo">633</span> currMemstoreTS = 0;<a name="line.633"></a> +<span class="sourceLineNo">634</span> currMemstoreTSLen = 1;<a name="line.634"></a> +<span class="sourceLineNo">635</span> return;<a name="line.635"></a> +<span class="sourceLineNo">636</span> }<a name="line.636"></a> +<span class="sourceLineNo">637</span> _readMvccVersion(offsetFromPos);<a name="line.637"></a> +<span class="sourceLineNo">638</span> }<a name="line.638"></a> +<span class="sourceLineNo">639</span><a name="line.639"></a> +<span class="sourceLineNo">640</span> /**<a name="line.640"></a> +<span class="sourceLineNo">641</span> * Actually do the mvcc read. Does no checks.<a name="line.641"></a> +<span class="sourceLineNo">642</span> * @param offsetFromPos<a name="line.642"></a> +<span class="sourceLineNo">643</span> */<a name="line.643"></a> +<span class="sourceLineNo">644</span> private void _readMvccVersion(int offsetFromPos) {<a name="line.644"></a> +<span class="sourceLineNo">645</span> // This is Bytes#bytesToVint inlined so can save a few instructions in this hot method; i.e.<a name="line.645"></a> +<span class="sourceLineNo">646</span> // previous if one-byte vint, we'd redo the vint call to find int size.<a name="line.646"></a> +<span class="sourceLineNo">647</span> // Also the method is kept small so can be inlined.<a name="line.647"></a> +<span class="sourceLineNo">648</span> byte firstByte = blockBuffer.getByteAfterPosition(offsetFromPos);<a name="line.648"></a> +<span class="sourceLineNo">649</span> int len = WritableUtils.decodeVIntSize(firstByte);<a name="line.649"></a> +<span class="sourceLineNo">650</span> if (len == 1) {<a name="line.650"></a> +<span class="sourceLineNo">651</span> this.currMemstoreTS = firstByte;<a name="line.651"></a> +<span class="sourceLineNo">652</span> } else {<a name="line.652"></a> +<span class="sourceLineNo">653</span> int remaining = len -1;<a name="line.653"></a> +<span class="sourceLineNo">654</span> long i = 0;<a name="line.654"></a> +<span class="sourceLineNo">655</span> offsetFromPos++;<a name="line.655"></a> +<span class="sourceLineNo">656</span> if (remaining >= Bytes.SIZEOF_INT) {<a name="line.656"></a> +<span class="sourceLineNo">657</span> i = blockBuffer.getIntAfterPosition(offsetFromPos);<a name="line.657"></a> +<span class="sourceLineNo">658</span> remaining -= Bytes.SIZEOF_INT;<a name="line.658"></a> +<span class="sourceLineNo">659</span> offsetFromPos += Bytes.SIZEOF_INT;<a name="line.659"></a> +<span class="sourceLineNo">660</span> }<a name="line.660"></a> +<span class="sourceLineNo">661</span> if (remaining >= Bytes.SIZEOF_SHORT) {<a name="line.661"></a> +<span class="sourceLineNo">662</span> short s = blockBuffer.getShortAfterPosition(offsetFromPos);<a name="line.662"></a> +<span class="sourceLineNo">663</span> i = i << 16;<a name="line.663"></a> +<span class="sourceLineNo">664</span> i = i | (s & 0xFFFF);<a name="line.664"></a> +<span class="sourceLineNo">665</span> remaining -= Bytes.SIZEOF_SHORT;<a name="line.665"></a> +<span class="sourceLineNo">666</span> offsetFromPos += Bytes.SIZEOF_SHORT;<a name="line.666"></a> +<span class="sourceLineNo">667</span> }<a name="line.667"></a> +<span class="sourceLineNo">668</span> for (int idx = 0; idx < remaining; idx++) {<a name="line.668"></a> +<span class="sourceLineNo">669</span> byte b = blockBuffer.getByteAfterPosition(offsetFromPos + idx);<a name="line.669"></a> +<span class="sourceLineNo">670</span> i = i << 8;<a name="line.670"></a> +<span class="sourceLineNo">671</span> i = i | (b & 0xFF);<a name="line.671"></a> +<span class="sourceLineNo">672</span> }<a name="line.672"></a> +<span class="sourceLineNo">673</span> currMemstoreTS = (WritableUtils.isNegativeVInt(firstByte) ? ~i : i);<a name="line.673"></a> +<span class="sourceLineNo">674</span> }<a name="line.674"></a> +<span class="sourceLineNo">675</span> this.currMemstoreTSLen = len;<a name="line.675"></a> +<span class="sourceLineNo">676</span> }<a name="line.676"></a> +<span class="sourceLineNo">677</span><a name="line.677"></a> +<span class="sourceLineNo">678</span> /**<a name="line.678"></a> +<span class="sourceLineNo">679</span> * Within a loaded block, seek looking for the last key that is smaller than<a name="line.679"></a> +<span class="sourceLineNo">680</span> * (or equal to?) the key we are interested in.<a name="line.680"></a> +<span class="sourceLineNo">681</span> * A note on the seekBefore: if you have seekBefore = true, AND the first<a name="line.681"></a> +<span class="sourceLineNo">682</span> * key in the block = key, then you'll get thrown exceptions. The caller has<a name="line.682"></a> +<span class="sourceLineNo">683</span> * to check for that case and load the previous block as appropriate.<a name="line.683"></a> +<span class="sourceLineNo">684</span> * @param key<a name="line.684"></a> +<span class="sourceLineNo">685</span> * the key to find<a name="line.685"></a> +<span class="sourceLineNo">686</span> * @param seekBefore<a name="line.686"></a> +<span class="sourceLineNo">687</span> * find the key before the given key in case of exact match.<a na
<TRUNCATED>