http://git-wip-us.apache.org/repos/asf/hbase-site/blob/b3b50f22/devapidocs/src-html/org/apache/hadoop/hbase/io/hfile/bucket/FileIOEngine.FileWriteAccessor.html ---------------------------------------------------------------------- diff --git a/devapidocs/src-html/org/apache/hadoop/hbase/io/hfile/bucket/FileIOEngine.FileWriteAccessor.html b/devapidocs/src-html/org/apache/hadoop/hbase/io/hfile/bucket/FileIOEngine.FileWriteAccessor.html index ba2c5f6..803999d 100644 --- a/devapidocs/src-html/org/apache/hadoop/hbase/io/hfile/bucket/FileIOEngine.FileWriteAccessor.html +++ b/devapidocs/src-html/org/apache/hadoop/hbase/io/hfile/bucket/FileIOEngine.FileWriteAccessor.html @@ -60,209 +60,222 @@ <span class="sourceLineNo">052</span> private FileReadAccessor readAccessor = new FileReadAccessor();<a name="line.52"></a> <span class="sourceLineNo">053</span> private FileWriteAccessor writeAccessor = new FileWriteAccessor();<a name="line.53"></a> <span class="sourceLineNo">054</span><a name="line.54"></a> -<span class="sourceLineNo">055</span> public FileIOEngine(long capacity, String... filePaths) throws IOException {<a name="line.55"></a> -<span class="sourceLineNo">056</span> this.sizePerFile = capacity / filePaths.length;<a name="line.56"></a> -<span class="sourceLineNo">057</span> this.capacity = this.sizePerFile * filePaths.length;<a name="line.57"></a> -<span class="sourceLineNo">058</span> this.filePaths = filePaths;<a name="line.58"></a> -<span class="sourceLineNo">059</span> this.fileChannels = new FileChannel[filePaths.length];<a name="line.59"></a> -<span class="sourceLineNo">060</span> this.rafs = new RandomAccessFile[filePaths.length];<a name="line.60"></a> -<span class="sourceLineNo">061</span> for (int i = 0; i < filePaths.length; i++) {<a name="line.61"></a> -<span class="sourceLineNo">062</span> String filePath = filePaths[i];<a name="line.62"></a> -<span class="sourceLineNo">063</span> try {<a name="line.63"></a> -<span class="sourceLineNo">064</span> rafs[i] = new RandomAccessFile(filePath, "rw");<a name="line.64"></a> -<span class="sourceLineNo">065</span> long totalSpace = new File(filePath).getTotalSpace();<a name="line.65"></a> -<span class="sourceLineNo">066</span> if (totalSpace < sizePerFile) {<a name="line.66"></a> -<span class="sourceLineNo">067</span> // The next setting length will throw exception,logging this message<a name="line.67"></a> -<span class="sourceLineNo">068</span> // is just used for the detail reason of exceptionï¼<a name="line.68"></a> -<span class="sourceLineNo">069</span> String msg = "Only " + StringUtils.byteDesc(totalSpace)<a name="line.69"></a> -<span class="sourceLineNo">070</span> + " total space under " + filePath + ", not enough for requested "<a name="line.70"></a> -<span class="sourceLineNo">071</span> + StringUtils.byteDesc(sizePerFile);<a name="line.71"></a> -<span class="sourceLineNo">072</span> LOG.warn(msg);<a name="line.72"></a> -<span class="sourceLineNo">073</span> }<a name="line.73"></a> -<span class="sourceLineNo">074</span> rafs[i].setLength(sizePerFile);<a name="line.74"></a> -<span class="sourceLineNo">075</span> fileChannels[i] = rafs[i].getChannel();<a name="line.75"></a> -<span class="sourceLineNo">076</span> LOG.info("Allocating cache " + StringUtils.byteDesc(sizePerFile)<a name="line.76"></a> -<span class="sourceLineNo">077</span> + ", on the path:" + filePath);<a name="line.77"></a> -<span class="sourceLineNo">078</span> } catch (IOException fex) {<a name="line.78"></a> -<span class="sourceLineNo">079</span> LOG.error("Failed allocating cache on " + filePath, fex);<a name="line.79"></a> -<span class="sourceLineNo">080</span> shutdown();<a name="line.80"></a> -<span class="sourceLineNo">081</span> throw fex;<a name="line.81"></a> -<span class="sourceLineNo">082</span> }<a name="line.82"></a> -<span class="sourceLineNo">083</span> }<a name="line.83"></a> -<span class="sourceLineNo">084</span> }<a 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name="line.63"></a> +<span class="sourceLineNo">064</span> if (file.exists()) {<a name="line.64"></a> +<span class="sourceLineNo">065</span> if (LOG.isDebugEnabled()) {<a name="line.65"></a> +<span class="sourceLineNo">066</span> LOG.debug("File " + filePath + " already exists. 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class="sourceLineNo">125</span> /**<a name="line.125"></a> -<span class="sourceLineNo">126</span> * Transfers data from the given byte buffer to file<a name="line.126"></a> -<span class="sourceLineNo">127</span> * @param srcBuffer the given byte buffer from which bytes are to be read<a name="line.127"></a> -<span class="sourceLineNo">128</span> * @param offset The offset in the file where the first byte to be written<a name="line.128"></a> -<span class="sourceLineNo">129</span> * @throws IOException<a name="line.129"></a> -<span class="sourceLineNo">130</span> */<a name="line.130"></a> -<span class="sourceLineNo">131</span> @Override<a name="line.131"></a> -<span class="sourceLineNo">132</span> public void write(ByteBuffer srcBuffer, long offset) throws IOException {<a name="line.132"></a> -<span class="sourceLineNo">133</span> accessFile(writeAccessor, srcBuffer, offset);<a name="line.133"></a> -<span class="sourceLineNo">134</span> }<a name="line.134"></a> -<span 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class="sourceLineNo">182</span> long globalOffset) throws IOException {<a name="line.182"></a> -<span class="sourceLineNo">183</span> int startFileNum = getFileNum(globalOffset);<a name="line.183"></a> -<span class="sourceLineNo">184</span> int remainingAccessDataLen = buffer.remaining();<a name="line.184"></a> -<span class="sourceLineNo">185</span> int endFileNum = getFileNum(globalOffset + remainingAccessDataLen - 1);<a name="line.185"></a> -<span class="sourceLineNo">186</span> int accessFileNum = startFileNum;<a name="line.186"></a> -<span class="sourceLineNo">187</span> long accessOffset = getAbsoluteOffsetInFile(accessFileNum, globalOffset);<a name="line.187"></a> -<span class="sourceLineNo">188</span> int bufLimit = buffer.limit();<a name="line.188"></a> -<span class="sourceLineNo">189</span> while (true) {<a name="line.189"></a> -<span class="sourceLineNo">190</span> FileChannel fileChannel = fileChannels[accessFileNum];<a name="line.190"></a> -<span 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-<span class="sourceLineNo">213</span> }<a name="line.213"></a> -<span class="sourceLineNo">214</span><a name="line.214"></a> -<span class="sourceLineNo">215</span> /**<a name="line.215"></a> -<span class="sourceLineNo">216</span> * Get the absolute offset in given file with the relative global offset.<a name="line.216"></a> -<span class="sourceLineNo">217</span> * @param fileNum<a name="line.217"></a> -<span class="sourceLineNo">218</span> * @param globalOffset<a name="line.218"></a> -<span class="sourceLineNo">219</span> * @return the absolute offset<a name="line.219"></a> -<span class="sourceLineNo">220</span> */<a name="line.220"></a> -<span class="sourceLineNo">221</span> private long getAbsoluteOffsetInFile(int fileNum, long globalOffset) {<a name="line.221"></a> -<span class="sourceLineNo">222</span> return globalOffset - fileNum * sizePerFile;<a name="line.222"></a> -<span class="sourceLineNo">223</span> }<a name="line.223"></a> -<span class="sourceLineNo">224</span><a 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shared memory that we point to. 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class="sourceLineNo">160</span> } catch (IOException ie) {<a name="line.160"></a> +<span class="sourceLineNo">161</span> LOG.warn("Failed syncing data to " + this.filePaths[i]);<a name="line.161"></a> +<span class="sourceLineNo">162</span> throw ie;<a name="line.162"></a> +<span class="sourceLineNo">163</span> }<a name="line.163"></a> +<span class="sourceLineNo">164</span> }<a name="line.164"></a> +<span class="sourceLineNo">165</span> }<a name="line.165"></a> +<span class="sourceLineNo">166</span><a name="line.166"></a> +<span class="sourceLineNo">167</span> /**<a name="line.167"></a> +<span class="sourceLineNo">168</span> * Close the file<a name="line.168"></a> +<span class="sourceLineNo">169</span> */<a name="line.169"></a> +<span class="sourceLineNo">170</span> @Override<a name="line.170"></a> +<span class="sourceLineNo">171</span> public void shutdown() {<a name="line.171"></a> +<span class="sourceLineNo">172</span> for (int i = 0; i < filePaths.length; i++) {<a 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class="sourceLineNo">204</span> if (endFileNum > accessFileNum) {<a name="line.204"></a> +<span class="sourceLineNo">205</span> // short the limit;<a name="line.205"></a> +<span class="sourceLineNo">206</span> buffer.limit((int) (buffer.limit() - remainingAccessDataLen<a name="line.206"></a> +<span class="sourceLineNo">207</span> + sizePerFile - accessOffset));<a name="line.207"></a> +<span class="sourceLineNo">208</span> }<a name="line.208"></a> +<span class="sourceLineNo">209</span> int accessLen = accessor.access(fileChannel, buffer, accessOffset);<a name="line.209"></a> +<span class="sourceLineNo">210</span> // recover the limit<a name="line.210"></a> +<span class="sourceLineNo">211</span> buffer.limit(bufLimit);<a name="line.211"></a> +<span class="sourceLineNo">212</span> if (accessLen < remainingAccessDataLen) {<a name="line.212"></a> +<span class="sourceLineNo">213</span> remainingAccessDataLen -= accessLen;<a name="line.213"></a> +<span class="sourceLineNo">214</span> 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name="line.237"></a> +<span class="sourceLineNo">238</span> private int getFileNum(long offset) {<a name="line.238"></a> +<span class="sourceLineNo">239</span> if (offset < 0) {<a name="line.239"></a> +<span class="sourceLineNo">240</span> throw new IllegalArgumentException("Unexpected offset " + offset);<a name="line.240"></a> +<span class="sourceLineNo">241</span> }<a name="line.241"></a> +<span class="sourceLineNo">242</span> int fileNum = (int) (offset / sizePerFile);<a name="line.242"></a> +<span class="sourceLineNo">243</span> if (fileNum >= fileChannels.length) {<a name="line.243"></a> +<span class="sourceLineNo">244</span> throw new RuntimeException("Not expected offset " + offset<a name="line.244"></a> +<span class="sourceLineNo">245</span> + " where capacity=" + capacity);<a name="line.245"></a> +<span class="sourceLineNo">246</span> }<a name="line.246"></a> +<span class="sourceLineNo">247</span> return fileNum;<a name="line.247"></a> <span class="sourceLineNo">248</span> }<a 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ByteBuffer byteBuffer, long accessOffset)<a name="line.251"></a> +<span class="sourceLineNo">252</span> throws IOException;<a name="line.252"></a> +<span class="sourceLineNo">253</span> }<a name="line.253"></a> +<span class="sourceLineNo">254</span><a name="line.254"></a> +<span class="sourceLineNo">255</span> private static class FileReadAccessor implements FileAccessor {<a name="line.255"></a> +<span class="sourceLineNo">256</span> @Override<a name="line.256"></a> +<span class="sourceLineNo">257</span> public int access(FileChannel fileChannel, ByteBuffer byteBuffer,<a name="line.257"></a> +<span class="sourceLineNo">258</span> long accessOffset) throws IOException {<a name="line.258"></a> +<span class="sourceLineNo">259</span> return fileChannel.read(byteBuffer, accessOffset);<a name="line.259"></a> +<span class="sourceLineNo">260</span> }<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> private static class FileWriteAccessor implements FileAccessor {<a name="line.263"></a> +<span class="sourceLineNo">264</span> @Override<a name="line.264"></a> +<span class="sourceLineNo">265</span> public int access(FileChannel fileChannel, ByteBuffer byteBuffer,<a name="line.265"></a> +<span class="sourceLineNo">266</span> long accessOffset) throws IOException {<a name="line.266"></a> +<span class="sourceLineNo">267</span> return fileChannel.write(byteBuffer, accessOffset);<a name="line.267"></a> +<span class="sourceLineNo">268</span> }<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>
http://git-wip-us.apache.org/repos/asf/hbase-site/blob/b3b50f22/devapidocs/src-html/org/apache/hadoop/hbase/io/hfile/bucket/FileIOEngine.html ---------------------------------------------------------------------- diff --git a/devapidocs/src-html/org/apache/hadoop/hbase/io/hfile/bucket/FileIOEngine.html b/devapidocs/src-html/org/apache/hadoop/hbase/io/hfile/bucket/FileIOEngine.html index ba2c5f6..803999d 100644 --- a/devapidocs/src-html/org/apache/hadoop/hbase/io/hfile/bucket/FileIOEngine.html +++ b/devapidocs/src-html/org/apache/hadoop/hbase/io/hfile/bucket/FileIOEngine.html @@ -60,209 +60,222 @@ <span class="sourceLineNo">052</span> private FileReadAccessor readAccessor = new FileReadAccessor();<a name="line.52"></a> <span class="sourceLineNo">053</span> private FileWriteAccessor writeAccessor = new FileWriteAccessor();<a name="line.53"></a> <span class="sourceLineNo">054</span><a name="line.54"></a> -<span class="sourceLineNo">055</span> public FileIOEngine(long capacity, String... 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class="sourceLineNo">182</span> long globalOffset) throws IOException {<a name="line.182"></a> -<span class="sourceLineNo">183</span> int startFileNum = getFileNum(globalOffset);<a name="line.183"></a> -<span class="sourceLineNo">184</span> int remainingAccessDataLen = buffer.remaining();<a name="line.184"></a> -<span class="sourceLineNo">185</span> int endFileNum = getFileNum(globalOffset + remainingAccessDataLen - 1);<a name="line.185"></a> -<span class="sourceLineNo">186</span> int accessFileNum = startFileNum;<a name="line.186"></a> -<span class="sourceLineNo">187</span> long accessOffset = getAbsoluteOffsetInFile(accessFileNum, globalOffset);<a name="line.187"></a> -<span class="sourceLineNo">188</span> int bufLimit = buffer.limit();<a name="line.188"></a> -<span class="sourceLineNo">189</span> while (true) {<a name="line.189"></a> -<span class="sourceLineNo">190</span> FileChannel fileChannel = fileChannels[accessFileNum];<a name="line.190"></a> -<span 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shared memory that we point to. 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class="sourceLineNo">185</span><a name="line.185"></a> +<span class="sourceLineNo">186</span> @Override<a name="line.186"></a> +<span class="sourceLineNo">187</span> public void write(ByteBuff srcBuffer, long offset) throws IOException {<a name="line.187"></a> +<span class="sourceLineNo">188</span> // When caching block into BucketCache there will be single buffer backing for this HFileBlock.<a name="line.188"></a> +<span class="sourceLineNo">189</span> assert srcBuffer.hasArray();<a name="line.189"></a> +<span class="sourceLineNo">190</span> write(ByteBuffer.wrap(srcBuffer.array(), srcBuffer.arrayOffset(),<a name="line.190"></a> +<span class="sourceLineNo">191</span> srcBuffer.remaining()), offset);<a name="line.191"></a> +<span class="sourceLineNo">192</span> }<a name="line.192"></a> +<span class="sourceLineNo">193</span><a name="line.193"></a> +<span class="sourceLineNo">194</span> private void accessFile(FileAccessor accessor, ByteBuffer buffer,<a name="line.194"></a> +<span class="sourceLineNo">195</span> long globalOffset) throws IOException {<a name="line.195"></a> +<span class="sourceLineNo">196</span> int startFileNum = getFileNum(globalOffset);<a name="line.196"></a> +<span class="sourceLineNo">197</span> int remainingAccessDataLen = buffer.remaining();<a name="line.197"></a> +<span class="sourceLineNo">198</span> int endFileNum = getFileNum(globalOffset + remainingAccessDataLen - 1);<a name="line.198"></a> +<span class="sourceLineNo">199</span> int accessFileNum = startFileNum;<a name="line.199"></a> +<span class="sourceLineNo">200</span> long accessOffset = getAbsoluteOffsetInFile(accessFileNum, globalOffset);<a name="line.200"></a> +<span class="sourceLineNo">201</span> int bufLimit = buffer.limit();<a name="line.201"></a> +<span class="sourceLineNo">202</span> while (true) {<a name="line.202"></a> +<span class="sourceLineNo">203</span> FileChannel fileChannel = fileChannels[accessFileNum];<a name="line.203"></a> +<span class="sourceLineNo">204</span> if (endFileNum > accessFileNum) {<a name="line.204"></a> +<span class="sourceLineNo">205</span> // short the limit;<a name="line.205"></a> +<span class="sourceLineNo">206</span> buffer.limit((int) (buffer.limit() - remainingAccessDataLen<a name="line.206"></a> +<span class="sourceLineNo">207</span> + sizePerFile - accessOffset));<a name="line.207"></a> +<span class="sourceLineNo">208</span> }<a name="line.208"></a> +<span class="sourceLineNo">209</span> int accessLen = accessor.access(fileChannel, buffer, accessOffset);<a name="line.209"></a> +<span class="sourceLineNo">210</span> // recover the limit<a name="line.210"></a> +<span class="sourceLineNo">211</span> buffer.limit(bufLimit);<a name="line.211"></a> +<span class="sourceLineNo">212</span> if (accessLen < remainingAccessDataLen) {<a name="line.212"></a> +<span class="sourceLineNo">213</span> remainingAccessDataLen -= accessLen;<a name="line.213"></a> +<span class="sourceLineNo">214</span> accessFileNum++;<a name="line.214"></a> +<span class="sourceLineNo">215</span> accessOffset = 0;<a name="line.215"></a> +<span class="sourceLineNo">216</span> } else {<a name="line.216"></a> +<span class="sourceLineNo">217</span> break;<a name="line.217"></a> +<span class="sourceLineNo">218</span> }<a name="line.218"></a> +<span class="sourceLineNo">219</span> if (accessFileNum >= fileChannels.length) {<a name="line.219"></a> +<span class="sourceLineNo">220</span> throw new IOException("Required data len "<a name="line.220"></a> +<span class="sourceLineNo">221</span> + StringUtils.byteDesc(buffer.remaining())<a name="line.221"></a> +<span class="sourceLineNo">222</span> + " exceed the engine's capacity " + StringUtils.byteDesc(capacity)<a name="line.222"></a> +<span class="sourceLineNo">223</span> + " where offset=" + globalOffset);<a name="line.223"></a> +<span class="sourceLineNo">224</span> }<a name="line.224"></a> +<span class="sourceLineNo">225</span> }<a name="line.225"></a> +<span class="sourceLineNo">226</span> }<a name="line.226"></a> +<span class="sourceLineNo">227</span><a name="line.227"></a> +<span class="sourceLineNo">228</span> /**<a name="line.228"></a> +<span class="sourceLineNo">229</span> * Get the absolute offset in given file with the relative global offset.<a name="line.229"></a> +<span class="sourceLineNo">230</span> * @param fileNum<a name="line.230"></a> +<span class="sourceLineNo">231</span> * @param globalOffset<a name="line.231"></a> +<span class="sourceLineNo">232</span> * @return the absolute offset<a name="line.232"></a> +<span class="sourceLineNo">233</span> */<a name="line.233"></a> +<span class="sourceLineNo">234</span> private long getAbsoluteOffsetInFile(int fileNum, long globalOffset) {<a name="line.234"></a> +<span class="sourceLineNo">235</span> return globalOffset - fileNum * sizePerFile;<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> private int getFileNum(long offset) {<a name="line.238"></a> +<span class="sourceLineNo">239</span> if (offset < 0) {<a name="line.239"></a> +<span class="sourceLineNo">240</span> throw new IllegalArgumentException("Unexpected offset " + offset);<a name="line.240"></a> +<span class="sourceLineNo">241</span> }<a name="line.241"></a> +<span class="sourceLineNo">242</span> int fileNum = (int) (offset / sizePerFile);<a name="line.242"></a> +<span class="sourceLineNo">243</span> if (fileNum >= fileChannels.length) {<a name="line.243"></a> +<span class="sourceLineNo">244</span> throw new RuntimeException("Not expected offset " + offset<a name="line.244"></a> +<span class="sourceLineNo">245</span> + " where capacity=" + capacity);<a name="line.245"></a> +<span class="sourceLineNo">246</span> }<a name="line.246"></a> +<span class="sourceLineNo">247</span> return fileNum;<a name="line.247"></a> <span class="sourceLineNo">248</span> }<a name="line.248"></a> <span class="sourceLineNo">249</span><a name="line.249"></a> -<span class="sourceLineNo">250</span> private static class FileWriteAccessor implements FileAccessor {<a name="line.250"></a> -<span class="sourceLineNo">251</span> @Override<a name="line.251"></a> -<span class="sourceLineNo">252</span> public int access(FileChannel fileChannel, ByteBuffer byteBuffer,<a name="line.252"></a> -<span class="sourceLineNo">253</span> long accessOffset) throws IOException {<a name="line.253"></a> -<span class="sourceLineNo">254</span> return fileChannel.write(byteBuffer, accessOffset);<a name="line.254"></a> -<span class="sourceLineNo">255</span> }<a name="line.255"></a> -<span class="sourceLineNo">256</span> }<a name="line.256"></a> -<span class="sourceLineNo">257</span>}<a name="line.257"></a> +<span class="sourceLineNo">250</span> private static interface FileAccessor {<a name="line.250"></a> +<span class="sourceLineNo">251</span> int access(FileChannel fileChannel, ByteBuffer byteBuffer, long accessOffset)<a name="line.251"></a> +<span class="sourceLineNo">252</span> throws IOException;<a name="line.252"></a> +<span class="sourceLineNo">253</span> }<a name="line.253"></a> +<span class="sourceLineNo">254</span><a name="line.254"></a> +<span class="sourceLineNo">255</span> private static class FileReadAccessor implements FileAccessor {<a name="line.255"></a> +<span class="sourceLineNo">256</span> @Override<a name="line.256"></a> +<span class="sourceLineNo">257</span> public int access(FileChannel fileChannel, ByteBuffer byteBuffer,<a name="line.257"></a> +<span class="sourceLineNo">258</span> long accessOffset) throws IOException {<a name="line.258"></a> +<span class="sourceLineNo">259</span> return fileChannel.read(byteBuffer, accessOffset);<a name="line.259"></a> +<span class="sourceLineNo">260</span> }<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> private static class FileWriteAccessor implements FileAccessor {<a name="line.263"></a> +<span class="sourceLineNo">264</span> @Override<a name="line.264"></a> +<span class="sourceLineNo">265</span> public int access(FileChannel fileChannel, ByteBuffer byteBuffer,<a name="line.265"></a> +<span class="sourceLineNo">266</span> long accessOffset) throws IOException {<a name="line.266"></a> +<span class="sourceLineNo">267</span> return fileChannel.write(byteBuffer, accessOffset);<a name="line.267"></a> +<span class="sourceLineNo">268</span> }<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>
