http://git-wip-us.apache.org/repos/asf/hbase-site/blob/3e48e84d/devapidocs/src-html/org/apache/hadoop/hbase/io/hfile/HFile.CachingBlockReader.html ---------------------------------------------------------------------- diff --git a/devapidocs/src-html/org/apache/hadoop/hbase/io/hfile/HFile.CachingBlockReader.html b/devapidocs/src-html/org/apache/hadoop/hbase/io/hfile/HFile.CachingBlockReader.html index 8fd15a0..da22771 100644 --- a/devapidocs/src-html/org/apache/hadoop/hbase/io/hfile/HFile.CachingBlockReader.html +++ b/devapidocs/src-html/org/apache/hadoop/hbase/io/hfile/HFile.CachingBlockReader.html @@ -186,741 +186,742 @@ <span class="sourceLineNo">178</span> * The number of bytes per checksum.<a name="line.178"></a> <span class="sourceLineNo">179</span> */<a name="line.179"></a> <span class="sourceLineNo">180</span> public static final int DEFAULT_BYTES_PER_CHECKSUM = 16 * 1024;<a name="line.180"></a> -<span class="sourceLineNo">181</span> // For measuring number of checksum failures<a name="line.181"></a> -<span class="sourceLineNo">182</span> static final Counter checksumFailures = new Counter();<a name="line.182"></a> -<span class="sourceLineNo">183</span><a name="line.183"></a> -<span class="sourceLineNo">184</span> // for test purpose<a name="line.184"></a> -<span class="sourceLineNo">185</span> public static final Counter dataBlockReadCnt = new Counter();<a name="line.185"></a> -<span class="sourceLineNo">186</span><a name="line.186"></a> -<span class="sourceLineNo">187</span> /**<a name="line.187"></a> -<span class="sourceLineNo">188</span> * Number of checksum verification failures. It also<a name="line.188"></a> -<span class="sourceLineNo">189</span> * clears the counter.<a name="line.189"></a> -<span class="sourceLineNo">190</span> */<a name="line.190"></a> -<span class="sourceLineNo">191</span> public static final long getChecksumFailuresCount() {<a name="line.191"></a> -<span class="sourceLineNo">192</span> long count = checksumFailures.get();<a name="line.192"></a> -<span class="sourceLineNo">193</span> checksumFailures.set(0);<a name="line.193"></a> -<span class="sourceLineNo">194</span> return count;<a name="line.194"></a> -<span class="sourceLineNo">195</span> }<a name="line.195"></a> -<span class="sourceLineNo">196</span><a name="line.196"></a> -<span class="sourceLineNo">197</span> /** API required to write an {@link HFile} */<a name="line.197"></a> -<span class="sourceLineNo">198</span> public interface Writer extends Closeable {<a name="line.198"></a> -<span class="sourceLineNo">199</span> /** Max memstore (mvcc) timestamp in FileInfo */<a name="line.199"></a> -<span class="sourceLineNo">200</span> public static final byte [] MAX_MEMSTORE_TS_KEY = Bytes.toBytes("MAX_MEMSTORE_TS_KEY");<a name="line.200"></a> -<span class="sourceLineNo">201</span><a name="line.201"></a> -<span class="sourceLineNo">202</span> /** Add an element to the file info map. */<a name="line.202"></a> -<span class="sourceLineNo">203</span> void appendFileInfo(byte[] key, byte[] value) throws IOException;<a name="line.203"></a> -<span class="sourceLineNo">204</span><a name="line.204"></a> -<span class="sourceLineNo">205</span> void append(Cell cell) throws IOException;<a name="line.205"></a> -<span class="sourceLineNo">206</span><a name="line.206"></a> -<span class="sourceLineNo">207</span> /** @return the path to this {@link HFile} */<a name="line.207"></a> -<span class="sourceLineNo">208</span> Path getPath();<a name="line.208"></a> -<span class="sourceLineNo">209</span><a name="line.209"></a> -<span class="sourceLineNo">210</span> /**<a name="line.210"></a> -<span class="sourceLineNo">211</span> * Adds an inline block writer such as a multi-level block index writer or<a name="line.211"></a> -<span class="sourceLineNo">212</span> * a compound Bloom filter writer.<a name="line.212"></a> -<span class="sourceLineNo">213</span> */<a name="line.213"></a> -<span class="sourceLineNo">214</span> void addInlineBlockWriter(InlineBlockWriter bloomWriter);<a name="line.214"></a> -<span class="sourceLineNo">215</span><a name="line.215"></a> -<span class="sourceLineNo">216</span> // The below three methods take Writables. We'd like to undo Writables but undoing the below would be pretty<a name="line.216"></a> -<span class="sourceLineNo">217</span> // painful. Could take a byte [] or a Message but we want to be backward compatible around hfiles so would need<a name="line.217"></a> -<span class="sourceLineNo">218</span> // to map between Message and Writable or byte [] and current Writable serialization. This would be a bit of work<a name="line.218"></a> -<span class="sourceLineNo">219</span> // to little gain. Thats my thinking at moment. St.Ack 20121129<a name="line.219"></a> -<span class="sourceLineNo">220</span><a name="line.220"></a> -<span class="sourceLineNo">221</span> void appendMetaBlock(String bloomFilterMetaKey, Writable metaWriter);<a name="line.221"></a> -<span class="sourceLineNo">222</span><a name="line.222"></a> -<span class="sourceLineNo">223</span> /**<a name="line.223"></a> -<span class="sourceLineNo">224</span> * Store general Bloom filter in the file. 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name="line.234"></a> -<span class="sourceLineNo">235</span><a name="line.235"></a> -<span class="sourceLineNo">236</span> /**<a name="line.236"></a> -<span class="sourceLineNo">237</span> * Return the file context for the HFile this writer belongs to<a name="line.237"></a> -<span class="sourceLineNo">238</span> */<a name="line.238"></a> -<span class="sourceLineNo">239</span> HFileContext getFileContext();<a name="line.239"></a> -<span class="sourceLineNo">240</span> }<a name="line.240"></a> -<span class="sourceLineNo">241</span><a name="line.241"></a> -<span class="sourceLineNo">242</span> /**<a name="line.242"></a> -<span class="sourceLineNo">243</span> * This variety of ways to construct writers is used throughout the code, and<a name="line.243"></a> -<span class="sourceLineNo">244</span> * we want to be able to swap writer implementations.<a name="line.244"></a> -<span class="sourceLineNo">245</span> */<a name="line.245"></a> -<span class="sourceLineNo">246</span> public static class WriterFactory {<a name="line.246"></a> -<span class="sourceLineNo">247</span> protected final Configuration conf;<a name="line.247"></a> -<span class="sourceLineNo">248</span> protected final CacheConfig cacheConf;<a name="line.248"></a> -<span class="sourceLineNo">249</span> protected FileSystem fs;<a name="line.249"></a> -<span class="sourceLineNo">250</span> protected Path path;<a name="line.250"></a> -<span class="sourceLineNo">251</span> protected FSDataOutputStream ostream;<a name="line.251"></a> -<span class="sourceLineNo">252</span> protected CellComparator comparator = <a name="line.252"></a> -<span class="sourceLineNo">253</span> CellComparator.COMPARATOR;<a name="line.253"></a> -<span class="sourceLineNo">254</span> protected InetSocketAddress[] favoredNodes;<a name="line.254"></a> -<span class="sourceLineNo">255</span> private HFileContext fileContext;<a name="line.255"></a> -<span class="sourceLineNo">256</span> protected boolean shouldDropBehind = false;<a name="line.256"></a> -<span class="sourceLineNo">257</span><a name="line.257"></a> -<span class="sourceLineNo">258</span> WriterFactory(Configuration conf, CacheConfig cacheConf) {<a name="line.258"></a> -<span class="sourceLineNo">259</span> this.conf = conf;<a name="line.259"></a> -<span class="sourceLineNo">260</span> this.cacheConf = cacheConf;<a name="line.260"></a> -<span class="sourceLineNo">261</span> }<a name="line.261"></a> -<span class="sourceLineNo">262</span><a name="line.262"></a> -<span class="sourceLineNo">263</span> public WriterFactory withPath(FileSystem fs, Path path) {<a name="line.263"></a> -<span class="sourceLineNo">264</span> Preconditions.checkNotNull(fs);<a name="line.264"></a> -<span class="sourceLineNo">265</span> Preconditions.checkNotNull(path);<a name="line.265"></a> -<span class="sourceLineNo">266</span> this.fs = fs;<a name="line.266"></a> -<span class="sourceLineNo">267</span> this.path = path;<a name="line.267"></a> -<span class="sourceLineNo">268</span> return this;<a name="line.268"></a> -<span class="sourceLineNo">269</span> }<a name="line.269"></a> -<span class="sourceLineNo">270</span><a name="line.270"></a> -<span class="sourceLineNo">271</span> public WriterFactory withOutputStream(FSDataOutputStream ostream) {<a name="line.271"></a> -<span class="sourceLineNo">272</span> Preconditions.checkNotNull(ostream);<a name="line.272"></a> -<span class="sourceLineNo">273</span> this.ostream = ostream;<a name="line.273"></a> -<span class="sourceLineNo">274</span> return this;<a name="line.274"></a> -<span class="sourceLineNo">275</span> }<a name="line.275"></a> -<span class="sourceLineNo">276</span><a name="line.276"></a> -<span class="sourceLineNo">277</span> public WriterFactory withComparator(CellComparator comparator) {<a name="line.277"></a> -<span class="sourceLineNo">278</span> Preconditions.checkNotNull(comparator);<a name="line.278"></a> -<span class="sourceLineNo">279</span> this.comparator = comparator;<a name="line.279"></a> -<span class="sourceLineNo">280</span> return this;<a name="line.280"></a> -<span class="sourceLineNo">281</span> }<a name="line.281"></a> -<span class="sourceLineNo">282</span><a name="line.282"></a> -<span class="sourceLineNo">283</span> public WriterFactory withFavoredNodes(InetSocketAddress[] favoredNodes) {<a name="line.283"></a> -<span class="sourceLineNo">284</span> // Deliberately not checking for null here.<a name="line.284"></a> -<span class="sourceLineNo">285</span> this.favoredNodes = favoredNodes;<a name="line.285"></a> -<span class="sourceLineNo">286</span> return this;<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> public WriterFactory withFileContext(HFileContext fileContext) {<a name="line.289"></a> -<span class="sourceLineNo">290</span> this.fileContext = fileContext;<a name="line.290"></a> -<span class="sourceLineNo">291</span> return this;<a name="line.291"></a> -<span class="sourceLineNo">292</span> }<a name="line.292"></a> -<span class="sourceLineNo">293</span><a name="line.293"></a> -<span class="sourceLineNo">294</span> public WriterFactory withShouldDropCacheBehind(boolean shouldDropBehind) {<a name="line.294"></a> -<span class="sourceLineNo">295</span> this.shouldDropBehind = shouldDropBehind;<a name="line.295"></a> -<span class="sourceLineNo">296</span> return this;<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">181</span><a name="line.181"></a> +<span class="sourceLineNo">182</span> // For measuring number of checksum failures<a name="line.182"></a> +<span class="sourceLineNo">183</span> static final Counter CHECKSUM_FAILURES = new Counter();<a name="line.183"></a> +<span class="sourceLineNo">184</span><a name="line.184"></a> +<span class="sourceLineNo">185</span> // For tests. Gets incremented when we read a block whether from HDFS or from Cache.<a name="line.185"></a> +<span class="sourceLineNo">186</span> public static final Counter DATABLOCK_READ_COUNT = new Counter();<a name="line.186"></a> +<span class="sourceLineNo">187</span><a name="line.187"></a> +<span class="sourceLineNo">188</span> /**<a name="line.188"></a> +<span class="sourceLineNo">189</span> * Number of checksum verification failures. It also<a name="line.189"></a> +<span class="sourceLineNo">190</span> * clears the counter.<a name="line.190"></a> +<span class="sourceLineNo">191</span> */<a name="line.191"></a> +<span class="sourceLineNo">192</span> public static final long getChecksumFailuresCount() {<a name="line.192"></a> +<span class="sourceLineNo">193</span> long count = CHECKSUM_FAILURES.get();<a name="line.193"></a> +<span class="sourceLineNo">194</span> CHECKSUM_FAILURES.set(0);<a name="line.194"></a> +<span class="sourceLineNo">195</span> return count;<a name="line.195"></a> +<span class="sourceLineNo">196</span> }<a name="line.196"></a> +<span class="sourceLineNo">197</span><a name="line.197"></a> +<span class="sourceLineNo">198</span> /** API required to write an {@link HFile} */<a name="line.198"></a> +<span class="sourceLineNo">199</span> public interface Writer extends Closeable {<a name="line.199"></a> +<span class="sourceLineNo">200</span> /** Max memstore (mvcc) timestamp in FileInfo */<a name="line.200"></a> +<span class="sourceLineNo">201</span> public static final byte [] MAX_MEMSTORE_TS_KEY = Bytes.toBytes("MAX_MEMSTORE_TS_KEY");<a name="line.201"></a> +<span class="sourceLineNo">202</span><a name="line.202"></a> +<span class="sourceLineNo">203</span> /** Add an element to the file info map. */<a name="line.203"></a> +<span class="sourceLineNo">204</span> void appendFileInfo(byte[] key, byte[] value) throws IOException;<a name="line.204"></a> +<span class="sourceLineNo">205</span><a name="line.205"></a> +<span class="sourceLineNo">206</span> void append(Cell cell) throws IOException;<a name="line.206"></a> +<span class="sourceLineNo">207</span><a name="line.207"></a> +<span class="sourceLineNo">208</span> /** @return the path to this {@link HFile} */<a name="line.208"></a> +<span class="sourceLineNo">209</span> Path getPath();<a name="line.209"></a> +<span class="sourceLineNo">210</span><a name="line.210"></a> +<span class="sourceLineNo">211</span> /**<a name="line.211"></a> +<span class="sourceLineNo">212</span> * Adds an inline block writer such as a multi-level block index writer or<a name="line.212"></a> +<span class="sourceLineNo">213</span> * a compound Bloom filter writer.<a name="line.213"></a> +<span class="sourceLineNo">214</span> */<a name="line.214"></a> +<span class="sourceLineNo">215</span> void addInlineBlockWriter(InlineBlockWriter bloomWriter);<a name="line.215"></a> +<span class="sourceLineNo">216</span><a name="line.216"></a> +<span class="sourceLineNo">217</span> // The below three methods take Writables. We'd like to undo Writables but undoing the below would be pretty<a name="line.217"></a> +<span class="sourceLineNo">218</span> // painful. Could take a byte [] or a Message but we want to be backward compatible around hfiles so would need<a name="line.218"></a> +<span class="sourceLineNo">219</span> // to map between Message and Writable or byte [] and current Writable serialization. This would be a bit of work<a name="line.219"></a> +<span class="sourceLineNo">220</span> // to little gain. Thats my thinking at moment. St.Ack 20121129<a name="line.220"></a> +<span class="sourceLineNo">221</span><a name="line.221"></a> +<span class="sourceLineNo">222</span> void appendMetaBlock(String bloomFilterMetaKey, Writable metaWriter);<a name="line.222"></a> +<span class="sourceLineNo">223</span><a name="line.223"></a> +<span class="sourceLineNo">224</span> /**<a name="line.224"></a> +<span class="sourceLineNo">225</span> * Store general Bloom filter in the file. This does not deal with Bloom filter<a name="line.225"></a> +<span class="sourceLineNo">226</span> * internals but is necessary, since Bloom filters are stored differently<a name="line.226"></a> +<span class="sourceLineNo">227</span> * in HFile version 1 and version 2.<a name="line.227"></a> +<span class="sourceLineNo">228</span> */<a name="line.228"></a> +<span class="sourceLineNo">229</span> void addGeneralBloomFilter(BloomFilterWriter bfw);<a name="line.229"></a> +<span class="sourceLineNo">230</span><a name="line.230"></a> +<span class="sourceLineNo">231</span> /**<a name="line.231"></a> +<span class="sourceLineNo">232</span> * Store delete family Bloom filter in the file, which is only supported in<a name="line.232"></a> +<span class="sourceLineNo">233</span> * HFile V2.<a name="line.233"></a> +<span class="sourceLineNo">234</span> */<a name="line.234"></a> +<span class="sourceLineNo">235</span> void addDeleteFamilyBloomFilter(BloomFilterWriter bfw) throws IOException;<a name="line.235"></a> +<span class="sourceLineNo">236</span><a name="line.236"></a> +<span class="sourceLineNo">237</span> /**<a name="line.237"></a> +<span class="sourceLineNo">238</span> * Return the file context for the HFile this writer belongs to<a name="line.238"></a> +<span class="sourceLineNo">239</span> */<a name="line.239"></a> +<span class="sourceLineNo">240</span> HFileContext getFileContext();<a name="line.240"></a> +<span class="sourceLineNo">241</span> }<a name="line.241"></a> +<span class="sourceLineNo">242</span><a name="line.242"></a> +<span class="sourceLineNo">243</span> /**<a name="line.243"></a> +<span class="sourceLineNo">244</span> * This variety of ways to construct writers is used throughout the code, and<a name="line.244"></a> +<span class="sourceLineNo">245</span> * we want to be able to swap writer implementations.<a name="line.245"></a> +<span class="sourceLineNo">246</span> */<a name="line.246"></a> +<span class="sourceLineNo">247</span> public static class WriterFactory {<a name="line.247"></a> +<span class="sourceLineNo">248</span> protected final Configuration conf;<a name="line.248"></a> +<span class="sourceLineNo">249</span> protected final CacheConfig cacheConf;<a name="line.249"></a> +<span class="sourceLineNo">250</span> protected FileSystem fs;<a name="line.250"></a> +<span class="sourceLineNo">251</span> protected Path path;<a name="line.251"></a> +<span class="sourceLineNo">252</span> protected FSDataOutputStream ostream;<a name="line.252"></a> +<span class="sourceLineNo">253</span> protected CellComparator comparator = <a name="line.253"></a> +<span class="sourceLineNo">254</span> CellComparator.COMPARATOR;<a name="line.254"></a> +<span class="sourceLineNo">255</span> protected InetSocketAddress[] favoredNodes;<a name="line.255"></a> +<span class="sourceLineNo">256</span> private HFileContext fileContext;<a name="line.256"></a> +<span class="sourceLineNo">257</span> protected boolean shouldDropBehind = false;<a name="line.257"></a> +<span class="sourceLineNo">258</span><a name="line.258"></a> +<span class="sourceLineNo">259</span> WriterFactory(Configuration conf, CacheConfig cacheConf) {<a name="line.259"></a> +<span class="sourceLineNo">260</span> this.conf = conf;<a name="line.260"></a> +<span class="sourceLineNo">261</span> this.cacheConf = cacheConf;<a name="line.261"></a> +<span class="sourceLineNo">262</span> }<a name="line.262"></a> +<span class="sourceLineNo">263</span><a name="line.263"></a> +<span class="sourceLineNo">264</span> public WriterFactory withPath(FileSystem fs, Path path) {<a name="line.264"></a> +<span class="sourceLineNo">265</span> Preconditions.checkNotNull(fs);<a name="line.265"></a> +<span class="sourceLineNo">266</span> Preconditions.checkNotNull(path);<a name="line.266"></a> +<span class="sourceLineNo">267</span> this.fs = fs;<a name="line.267"></a> +<span class="sourceLineNo">268</span> this.path = path;<a name="line.268"></a> +<span class="sourceLineNo">269</span> return this;<a name="line.269"></a> +<span class="sourceLineNo">270</span> }<a name="line.270"></a> +<span class="sourceLineNo">271</span><a name="line.271"></a> +<span class="sourceLineNo">272</span> public WriterFactory withOutputStream(FSDataOutputStream ostream) {<a name="line.272"></a> +<span class="sourceLineNo">273</span> Preconditions.checkNotNull(ostream);<a name="line.273"></a> +<span class="sourceLineNo">274</span> this.ostream = ostream;<a name="line.274"></a> +<span class="sourceLineNo">275</span> return this;<a name="line.275"></a> +<span class="sourceLineNo">276</span> }<a name="line.276"></a> +<span class="sourceLineNo">277</span><a name="line.277"></a> +<span class="sourceLineNo">278</span> public WriterFactory withComparator(CellComparator comparator) {<a name="line.278"></a> +<span class="sourceLineNo">279</span> Preconditions.checkNotNull(comparator);<a name="line.279"></a> +<span class="sourceLineNo">280</span> this.comparator = comparator;<a name="line.280"></a> +<span class="sourceLineNo">281</span> return this;<a name="line.281"></a> +<span class="sourceLineNo">282</span> }<a name="line.282"></a> +<span class="sourceLineNo">283</span><a name="line.283"></a> +<span class="sourceLineNo">284</span> public WriterFactory withFavoredNodes(InetSocketAddress[] favoredNodes) {<a name="line.284"></a> +<span class="sourceLineNo">285</span> // Deliberately not checking for null here.<a name="line.285"></a> +<span class="sourceLineNo">286</span> this.favoredNodes = favoredNodes;<a name="line.286"></a> +<span class="sourceLineNo">287</span> return this;<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> public WriterFactory withFileContext(HFileContext fileContext) {<a name="line.290"></a> +<span class="sourceLineNo">291</span> this.fileContext = fileContext;<a name="line.291"></a> +<span class="sourceLineNo">292</span> return this;<a name="line.292"></a> +<span class="sourceLineNo">293</span> }<a name="line.293"></a> +<span class="sourceLineNo">294</span><a name="line.294"></a> +<span class="sourceLineNo">295</span> public WriterFactory withShouldDropCacheBehind(boolean shouldDropBehind) {<a name="line.295"></a> +<span class="sourceLineNo">296</span> this.shouldDropBehind = shouldDropBehind;<a name="line.296"></a> +<span class="sourceLineNo">297</span> return this;<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> public Writer create() throws IOException {<a name="line.300"></a> -<span class="sourceLineNo">301</span> if ((path != null ? 1 : 0) + (ostream != null ? 1 : 0) != 1) {<a name="line.301"></a> -<span class="sourceLineNo">302</span> throw new AssertionError("Please specify exactly one of " +<a name="line.302"></a> 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See HBASE-6635.<a name="line.483"></a> -<span class="sourceLineNo">484</span> *<a name="line.484"></a> -<span class="sourceLineNo">485</span> * @param path hfile's path<a name="line.485"></a> -<span class="sourceLineNo">486</span> * @param fsdis stream of path's file<a name="line.486"></a> -<span class="sourceLineNo">487</span> * @param size max size of the trailer.<a name="line.487"></a> -<span class="sourceLineNo">488</span> * @param cacheConf Cache configuation values, cannot be null.<a name="line.488"></a> -<span class="sourceLineNo">489</span> * @param hfs<a name="line.489"></a> -<span class="sourceLineNo">490</span> * @return an appropriate instance of HFileReader<a name="line.490"></a> -<span class="sourceLineNo">491</span> * @throws IOException If file is invalid, will throw CorruptHFileException flavored IOException<a name="line.491"></a> -<span class="sourceLineNo">492</span> */<a name="line.492"></a> -<span class="sourceLineNo">493</span> @edu.umd.cs.findbugs.annotations.SuppressWarnings(value="SF_SWITCH_FALLTHROUGH",<a name="line.493"></a> -<span class="sourceLineNo">494</span> justification="Intentional")<a name="line.494"></a> -<span class="sourceLineNo">495</span> private static Reader pickReaderVersion(Path path, FSDataInputStreamWrapper fsdis,<a name="line.495"></a> -<span class="sourceLineNo">496</span> long size, CacheConfig cacheConf, HFileSystem hfs, Configuration conf) throws IOException {<a name="line.496"></a> -<span class="sourceLineNo">497</span> FixedFileTrailer trailer = null;<a name="line.497"></a> -<span class="sourceLineNo">498</span> try {<a name="line.498"></a> -<span class="sourceLineNo">499</span> boolean isHBaseChecksum = fsdis.shouldUseHBaseChecksum();<a name="line.499"></a> -<span class="sourceLineNo">500</span> assert !isHBaseChecksum; // Initially we must read with FS checksum.<a name="line.500"></a> -<span class="sourceLineNo">501</span> trailer = FixedFileTrailer.readFromStream(fsdis.getStream(isHBaseChecksum), size);<a name="line.501"></a> -<span class="sourceLineNo">502</span> switch (trailer.getMajorVersion()) {<a name="line.502"></a> -<span class="sourceLineNo">503</span> case 2:<a name="line.503"></a> -<span class="sourceLineNo">504</span> LOG.debug("Opening HFile v2 with v3 reader");<a name="line.504"></a> -<span class="sourceLineNo">505</span> // Fall through. 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1 : 0) + (ostream != null ? 1 : 0) != 1) {<a name="line.302"></a> +<span class="sourceLineNo">303</span> throw new AssertionError("Please specify exactly one of " +<a name="line.303"></a> +<span class="sourceLineNo">304</span> "filesystem/path or path");<a name="line.304"></a> +<span class="sourceLineNo">305</span> }<a name="line.305"></a> +<span class="sourceLineNo">306</span> if (path != null) {<a name="line.306"></a> +<span class="sourceLineNo">307</span> ostream = HFileWriterImpl.createOutputStream(conf, fs, path, favoredNodes);<a name="line.307"></a> +<span class="sourceLineNo">308</span> try {<a name="line.308"></a> +<span class="sourceLineNo">309</span> ostream.setDropBehind(shouldDropBehind && cacheConf.shouldDropBehindCompaction());<a name="line.309"></a> +<span class="sourceLineNo">310</span> } catch (UnsupportedOperationException uoe) {<a name="line.310"></a> +<span class="sourceLineNo">311</span> if (LOG.isTraceEnabled()) LOG.trace("Unable to set drop behind on " + path, uoe);<a name="line.311"></a> +<span class="sourceLineNo">312</span> else if (LOG.isDebugEnabled()) LOG.debug("Unable to set drop behind on " + path);<a name="line.312"></a> +<span class="sourceLineNo">313</span> }<a name="line.313"></a> +<span class="sourceLineNo">314</span> }<a name="line.314"></a> +<span class="sourceLineNo">315</span> return new HFileWriterImpl(conf, cacheConf, path, ostream, comparator, fileContext);<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><a name="line.318"></a> +<span class="sourceLineNo">319</span> /** The configuration key for HFile version to use for new files */<a name="line.319"></a> +<span class="sourceLineNo">320</span> public static final String FORMAT_VERSION_KEY = "hfile.format.version";<a name="line.320"></a> +<span class="sourceLineNo">321</span><a name="line.321"></a> +<span class="sourceLineNo">322</span> public static int getFormatVersion(Configuration conf) {<a name="line.322"></a> +<span class="sourceLineNo">323</span> int version = conf.getInt(FORMAT_VERSION_KEY, MAX_FORMAT_VERSION);<a name="line.323"></a> +<span class="sourceLineNo">324</span> checkFormatVersion(version);<a name="line.324"></a> +<span class="sourceLineNo">325</span> return version;<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> /**<a name="line.328"></a> +<span class="sourceLineNo">329</span> * Returns the factory to be used to create {@link HFile} writers.<a name="line.329"></a> +<span class="sourceLineNo">330</span> * Disables block cache access for all writers created through the<a name="line.330"></a> +<span class="sourceLineNo">331</span> * returned factory.<a name="line.331"></a> +<span class="sourceLineNo">332</span> */<a name="line.332"></a> +<span class="sourceLineNo">333</span> public static final WriterFactory getWriterFactoryNoCache(Configuration<a name="line.333"></a> +<span class="sourceLineNo">334</span> conf) {<a name="line.334"></a> +<span class="sourceLineNo">335</span> Configuration tempConf = new Configuration(conf);<a name="line.335"></a> +<span class="sourceLineNo">336</span> tempConf.setFloat(HConstants.HFILE_BLOCK_CACHE_SIZE_KEY, 0.0f);<a name="line.336"></a> +<span class="sourceLineNo">337</span> return HFile.getWriterFactory(conf, new CacheConfig(tempConf));<a name="line.337"></a> +<span class="sourceLineNo">338</span> }<a name="line.338"></a> +<span class="sourceLineNo">339</span><a name="line.339"></a> +<span class="sourceLineNo">340</span> /**<a name="line.340"></a> +<span class="sourceLineNo">341</span> * Returns the factory to be used to create {@link HFile} writers<a name="line.341"></a> +<span class="sourceLineNo">342</span> */<a name="line.342"></a> +<span class="sourceLineNo">343</span> public static final WriterFactory getWriterFactory(Configuration conf,<a name="line.343"></a> +<span class="sourceLineNo">344</span> CacheConfig cacheConf) {<a name="line.344"></a> +<span class="sourceLineNo">345</span> int version = getFormatVersion(conf);<a name="line.345"></a> +<span class="sourceLineNo">346</span> switch (version) {<a name="line.346"></a> +<span class="sourceLineNo">347</span> case 2:<a name="line.347"></a> +<span class="sourceLineNo">348</span> throw new IllegalArgumentException("This should never happen. " +<a name="line.348"></a> +<span class="sourceLineNo">349</span> "Did you change hfile.format.version to read v2? This version of the software writes v3" +<a name="line.349"></a> +<span class="sourceLineNo">350</span> " hfiles only (but it can read v2 files without having to update hfile.format.version " +<a name="line.350"></a> +<span class="sourceLineNo">351</span> "in hbase-site.xml)");<a name="line.351"></a> +<span class="sourceLineNo">352</span> case 3:<a name="line.352"></a> +<span class="sourceLineNo">353</span> return new HFile.WriterFactory(conf, cacheConf);<a name="line.353"></a> +<span class="sourceLineNo">354</span> default:<a name="line.354"></a> +<span class="sourceLineNo">355</span> throw new IllegalArgumentException("Cannot create writer for HFile " +<a name="line.355"></a> +<span class="sourceLineNo">356</span> "format version " + version);<a name="line.356"></a> +<span class="sourceLineNo">357</span> }<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> * An abstraction used by the block index.<a name="line.361"></a> +<span class="sourceLineNo">362</span> * Implementations will check cache for any asked-for block and return cached block if found.<a name="line.362"></a> +<span class="sourceLineNo">363</span> * Otherwise, after reading from fs, will try and put block into cache before returning.<a name="line.363"></a> +<span class="sourceLineNo">364</span> */<a name="line.364"></a> +<span class="sourceLineNo">365</span> public interface CachingBlockReader {<a name="line.365"></a> +<span class="sourceLineNo">366</span> /**<a name="line.366"></a> +<span class="sourceLineNo">367</span> * Read in a file block.<a name="line.367"></a> +<span class="sourceLineNo">368</span> * @param offset offset to read.<a name="line.368"></a> +<span class="sourceLineNo">369</span> * @param onDiskBlockSize size of the block<a name="line.369"></a> +<span class="sourceLineNo">370</span> * @param cacheBlock<a name="line.370"></a> +<span class="sourceLineNo">371</span> * @param pread<a name="line.371"></a> +<span class="sourceLineNo">372</span> * @param isCompaction is this block being read as part of a compaction<a name="line.372"></a> +<span class="
<TRUNCATED>
