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| <pre><span class="sourceLineNo">001</span>/*<a name="line.1"></a> |
| <span class="sourceLineNo">002</span> * Licensed to the Apache Software Foundation (ASF) under one<a name="line.2"></a> |
| <span class="sourceLineNo">003</span> * or more contributor license agreements. See the NOTICE file<a name="line.3"></a> |
| <span class="sourceLineNo">004</span> * distributed with this work for additional information<a name="line.4"></a> |
| <span class="sourceLineNo">005</span> * regarding copyright ownership. The ASF licenses this file<a name="line.5"></a> |
| <span class="sourceLineNo">006</span> * to you under the Apache License, Version 2.0 (the<a name="line.6"></a> |
| <span class="sourceLineNo">007</span> * "License"); you may not use this file except in compliance<a name="line.7"></a> |
| <span class="sourceLineNo">008</span> * with the License. You may obtain a copy of the License at<a name="line.8"></a> |
| <span class="sourceLineNo">009</span> *<a name="line.9"></a> |
| <span class="sourceLineNo">010</span> * http://www.apache.org/licenses/LICENSE-2.0<a name="line.10"></a> |
| <span class="sourceLineNo">011</span> *<a name="line.11"></a> |
| <span class="sourceLineNo">012</span> * Unless required by applicable law or agreed to in writing, software<a name="line.12"></a> |
| <span class="sourceLineNo">013</span> * distributed under the License is distributed on an "AS IS" BASIS,<a name="line.13"></a> |
| <span class="sourceLineNo">014</span> * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.<a name="line.14"></a> |
| <span class="sourceLineNo">015</span> * See the License for the specific language governing permissions and<a name="line.15"></a> |
| <span class="sourceLineNo">016</span> * limitations under the License.<a name="line.16"></a> |
| <span class="sourceLineNo">017</span> */<a name="line.17"></a> |
| <span class="sourceLineNo">018</span>package org.apache.hadoop.hbase.ipc;<a name="line.18"></a> |
| <span class="sourceLineNo">019</span><a name="line.19"></a> |
| <span class="sourceLineNo">020</span>import java.io.ByteArrayInputStream;<a name="line.20"></a> |
| <span class="sourceLineNo">021</span>import java.io.IOException;<a name="line.21"></a> |
| <span class="sourceLineNo">022</span>import java.io.InputStream;<a name="line.22"></a> |
| <span class="sourceLineNo">023</span>import java.io.OutputStream;<a name="line.23"></a> |
| <span class="sourceLineNo">024</span>import java.nio.BufferOverflowException;<a name="line.24"></a> |
| <span class="sourceLineNo">025</span>import java.nio.ByteBuffer;<a name="line.25"></a> |
| <span class="sourceLineNo">026</span>import org.apache.commons.io.IOUtils;<a name="line.26"></a> |
| <span class="sourceLineNo">027</span>import org.apache.hadoop.conf.Configurable;<a name="line.27"></a> |
| <span class="sourceLineNo">028</span>import org.apache.hadoop.conf.Configuration;<a name="line.28"></a> |
| <span class="sourceLineNo">029</span>import org.apache.hadoop.hbase.CellScanner;<a name="line.29"></a> |
| <span class="sourceLineNo">030</span>import org.apache.hadoop.hbase.DoNotRetryIOException;<a name="line.30"></a> |
| <span class="sourceLineNo">031</span>import org.apache.hadoop.hbase.codec.Codec;<a name="line.31"></a> |
| <span class="sourceLineNo">032</span>import org.apache.hadoop.hbase.io.ByteBuffAllocator;<a name="line.32"></a> |
| <span class="sourceLineNo">033</span>import org.apache.hadoop.hbase.io.ByteBuffInputStream;<a name="line.33"></a> |
| <span class="sourceLineNo">034</span>import org.apache.hadoop.hbase.io.ByteBufferInputStream;<a name="line.34"></a> |
| <span class="sourceLineNo">035</span>import org.apache.hadoop.hbase.io.ByteBufferListOutputStream;<a name="line.35"></a> |
| <span class="sourceLineNo">036</span>import org.apache.hadoop.hbase.io.ByteBufferOutputStream;<a name="line.36"></a> |
| <span class="sourceLineNo">037</span>import org.apache.hadoop.hbase.nio.ByteBuff;<a name="line.37"></a> |
| <span class="sourceLineNo">038</span>import org.apache.hadoop.hbase.nio.SingleByteBuff;<a name="line.38"></a> |
| <span class="sourceLineNo">039</span>import org.apache.hadoop.hbase.util.ClassSize;<a name="line.39"></a> |
| <span class="sourceLineNo">040</span>import org.apache.hadoop.io.compress.CodecPool;<a name="line.40"></a> |
| <span class="sourceLineNo">041</span>import org.apache.hadoop.io.compress.CompressionCodec;<a name="line.41"></a> |
| <span class="sourceLineNo">042</span>import org.apache.hadoop.io.compress.CompressionInputStream;<a name="line.42"></a> |
| <span class="sourceLineNo">043</span>import org.apache.hadoop.io.compress.Compressor;<a name="line.43"></a> |
| <span class="sourceLineNo">044</span>import org.apache.hadoop.io.compress.Decompressor;<a name="line.44"></a> |
| <span class="sourceLineNo">045</span>import org.apache.yetus.audience.InterfaceAudience;<a name="line.45"></a> |
| <span class="sourceLineNo">046</span>import org.slf4j.Logger;<a name="line.46"></a> |
| <span class="sourceLineNo">047</span>import org.slf4j.LoggerFactory;<a name="line.47"></a> |
| <span class="sourceLineNo">048</span><a name="line.48"></a> |
| <span class="sourceLineNo">049</span>import org.apache.hbase.thirdparty.io.netty.buffer.ByteBuf;<a name="line.49"></a> |
| <span class="sourceLineNo">050</span>import org.apache.hbase.thirdparty.io.netty.buffer.ByteBufAllocator;<a name="line.50"></a> |
| <span class="sourceLineNo">051</span>import org.apache.hbase.thirdparty.io.netty.buffer.ByteBufOutputStream;<a name="line.51"></a> |
| <span class="sourceLineNo">052</span><a name="line.52"></a> |
| <span class="sourceLineNo">053</span>/**<a name="line.53"></a> |
| <span class="sourceLineNo">054</span> * Helper class for building cell block.<a name="line.54"></a> |
| <span class="sourceLineNo">055</span> */<a name="line.55"></a> |
| <span class="sourceLineNo">056</span>@InterfaceAudience.Private<a name="line.56"></a> |
| <span class="sourceLineNo">057</span>class CellBlockBuilder {<a name="line.57"></a> |
| <span class="sourceLineNo">058</span><a name="line.58"></a> |
| <span class="sourceLineNo">059</span> // LOG is being used in TestCellBlockBuilder<a name="line.59"></a> |
| <span class="sourceLineNo">060</span> static final Logger LOG = LoggerFactory.getLogger(CellBlockBuilder.class);<a name="line.60"></a> |
| <span class="sourceLineNo">061</span><a name="line.61"></a> |
| <span class="sourceLineNo">062</span> private final Configuration conf;<a name="line.62"></a> |
| <span class="sourceLineNo">063</span><a name="line.63"></a> |
| <span class="sourceLineNo">064</span> /**<a name="line.64"></a> |
| <span class="sourceLineNo">065</span> * How much we think the decompressor will expand the original compressed content.<a name="line.65"></a> |
| <span class="sourceLineNo">066</span> */<a name="line.66"></a> |
| <span class="sourceLineNo">067</span> private final int cellBlockDecompressionMultiplier;<a name="line.67"></a> |
| <span class="sourceLineNo">068</span><a name="line.68"></a> |
| <span class="sourceLineNo">069</span> private final int cellBlockBuildingInitialBufferSize;<a name="line.69"></a> |
| <span class="sourceLineNo">070</span><a name="line.70"></a> |
| <span class="sourceLineNo">071</span> public CellBlockBuilder(Configuration conf) {<a name="line.71"></a> |
| <span class="sourceLineNo">072</span> this.conf = conf;<a name="line.72"></a> |
| <span class="sourceLineNo">073</span> this.cellBlockDecompressionMultiplier =<a name="line.73"></a> |
| <span class="sourceLineNo">074</span> conf.getInt("hbase.ipc.cellblock.decompression.buffersize.multiplier", 3);<a name="line.74"></a> |
| <span class="sourceLineNo">075</span><a name="line.75"></a> |
| <span class="sourceLineNo">076</span> // Guess that 16k is a good size for rpc buffer. Could go bigger. See the TODO below in<a name="line.76"></a> |
| <span class="sourceLineNo">077</span> // #buildCellBlock.<a name="line.77"></a> |
| <span class="sourceLineNo">078</span> this.cellBlockBuildingInitialBufferSize =<a name="line.78"></a> |
| <span class="sourceLineNo">079</span> ClassSize.align(conf.getInt("hbase.ipc.cellblock.building.initial.buffersize", 16 * 1024));<a name="line.79"></a> |
| <span class="sourceLineNo">080</span> }<a name="line.80"></a> |
| <span class="sourceLineNo">081</span><a name="line.81"></a> |
| <span class="sourceLineNo">082</span> private interface OutputStreamSupplier {<a name="line.82"></a> |
| <span class="sourceLineNo">083</span><a name="line.83"></a> |
| <span class="sourceLineNo">084</span> OutputStream get(int expectedSize);<a name="line.84"></a> |
| <span class="sourceLineNo">085</span><a name="line.85"></a> |
| <span class="sourceLineNo">086</span> int size();<a name="line.86"></a> |
| <span class="sourceLineNo">087</span> }<a name="line.87"></a> |
| <span class="sourceLineNo">088</span><a name="line.88"></a> |
| <span class="sourceLineNo">089</span> private static final class ByteBufferOutputStreamSupplier implements OutputStreamSupplier {<a name="line.89"></a> |
| <span class="sourceLineNo">090</span><a name="line.90"></a> |
| <span class="sourceLineNo">091</span> private ByteBufferOutputStream baos;<a name="line.91"></a> |
| <span class="sourceLineNo">092</span><a name="line.92"></a> |
| <span class="sourceLineNo">093</span> @Override<a name="line.93"></a> |
| <span class="sourceLineNo">094</span> public OutputStream get(int expectedSize) {<a name="line.94"></a> |
| <span class="sourceLineNo">095</span> baos = new ByteBufferOutputStream(expectedSize);<a name="line.95"></a> |
| <span class="sourceLineNo">096</span> return baos;<a name="line.96"></a> |
| <span class="sourceLineNo">097</span> }<a name="line.97"></a> |
| <span class="sourceLineNo">098</span><a name="line.98"></a> |
| <span class="sourceLineNo">099</span> @Override<a name="line.99"></a> |
| <span class="sourceLineNo">100</span> public int size() {<a name="line.100"></a> |
| <span class="sourceLineNo">101</span> return baos.size();<a name="line.101"></a> |
| <span class="sourceLineNo">102</span> }<a name="line.102"></a> |
| <span class="sourceLineNo">103</span> }<a name="line.103"></a> |
| <span class="sourceLineNo">104</span><a name="line.104"></a> |
| <span class="sourceLineNo">105</span> /**<a name="line.105"></a> |
| <span class="sourceLineNo">106</span> * Puts CellScanner Cells into a cell block using passed in <code>codec</code> and/or<a name="line.106"></a> |
| <span class="sourceLineNo">107</span> * <code>compressor</code>.<a name="line.107"></a> |
| <span class="sourceLineNo">108</span> * @return Null or byte buffer filled with a cellblock filled with passed-in Cells encoded using<a name="line.108"></a> |
| <span class="sourceLineNo">109</span> * passed in <code>codec</code> and/or <code>compressor</code>; the returned buffer has<a name="line.109"></a> |
| <span class="sourceLineNo">110</span> * been flipped and is ready for reading. Use limit to find total size.<a name="line.110"></a> |
| <span class="sourceLineNo">111</span> */<a name="line.111"></a> |
| <span class="sourceLineNo">112</span> public ByteBuffer buildCellBlock(final Codec codec, final CompressionCodec compressor,<a name="line.112"></a> |
| <span class="sourceLineNo">113</span> final CellScanner cellScanner) throws IOException {<a name="line.113"></a> |
| <span class="sourceLineNo">114</span> ByteBufferOutputStreamSupplier supplier = new ByteBufferOutputStreamSupplier();<a name="line.114"></a> |
| <span class="sourceLineNo">115</span> if (buildCellBlock(codec, compressor, cellScanner, supplier)) {<a name="line.115"></a> |
| <span class="sourceLineNo">116</span> ByteBuffer bb = supplier.baos.getByteBuffer();<a name="line.116"></a> |
| <span class="sourceLineNo">117</span> // If no cells, don't mess around. Just return null (could be a bunch of existence checking<a name="line.117"></a> |
| <span class="sourceLineNo">118</span> // gets or something -- stuff that does not return a cell).<a name="line.118"></a> |
| <span class="sourceLineNo">119</span> return bb.hasRemaining() ? bb : null;<a name="line.119"></a> |
| <span class="sourceLineNo">120</span> } else {<a name="line.120"></a> |
| <span class="sourceLineNo">121</span> return null;<a name="line.121"></a> |
| <span class="sourceLineNo">122</span> }<a name="line.122"></a> |
| <span class="sourceLineNo">123</span> }<a name="line.123"></a> |
| <span class="sourceLineNo">124</span><a name="line.124"></a> |
| <span class="sourceLineNo">125</span> private static final class ByteBufOutputStreamSupplier implements OutputStreamSupplier {<a name="line.125"></a> |
| <span class="sourceLineNo">126</span><a name="line.126"></a> |
| <span class="sourceLineNo">127</span> private final ByteBufAllocator alloc;<a name="line.127"></a> |
| <span class="sourceLineNo">128</span><a name="line.128"></a> |
| <span class="sourceLineNo">129</span> private ByteBuf buf;<a name="line.129"></a> |
| <span class="sourceLineNo">130</span><a name="line.130"></a> |
| <span class="sourceLineNo">131</span> public ByteBufOutputStreamSupplier(ByteBufAllocator alloc) {<a name="line.131"></a> |
| <span class="sourceLineNo">132</span> this.alloc = alloc;<a name="line.132"></a> |
| <span class="sourceLineNo">133</span> }<a name="line.133"></a> |
| <span class="sourceLineNo">134</span><a name="line.134"></a> |
| <span class="sourceLineNo">135</span> @Override<a name="line.135"></a> |
| <span class="sourceLineNo">136</span> public OutputStream get(int expectedSize) {<a name="line.136"></a> |
| <span class="sourceLineNo">137</span> buf = alloc.buffer(expectedSize);<a name="line.137"></a> |
| <span class="sourceLineNo">138</span> return new ByteBufOutputStream(buf);<a name="line.138"></a> |
| <span class="sourceLineNo">139</span> }<a name="line.139"></a> |
| <span class="sourceLineNo">140</span><a name="line.140"></a> |
| <span class="sourceLineNo">141</span> @Override<a name="line.141"></a> |
| <span class="sourceLineNo">142</span> public int size() {<a name="line.142"></a> |
| <span class="sourceLineNo">143</span> return buf.writerIndex();<a name="line.143"></a> |
| <span class="sourceLineNo">144</span> }<a name="line.144"></a> |
| <span class="sourceLineNo">145</span> }<a name="line.145"></a> |
| <span class="sourceLineNo">146</span><a name="line.146"></a> |
| <span class="sourceLineNo">147</span> public ByteBuf buildCellBlock(Codec codec, CompressionCodec compressor, CellScanner cellScanner,<a name="line.147"></a> |
| <span class="sourceLineNo">148</span> ByteBufAllocator alloc) throws IOException {<a name="line.148"></a> |
| <span class="sourceLineNo">149</span> ByteBufOutputStreamSupplier supplier = new ByteBufOutputStreamSupplier(alloc);<a name="line.149"></a> |
| <span class="sourceLineNo">150</span> if (buildCellBlock(codec, compressor, cellScanner, supplier)) {<a name="line.150"></a> |
| <span class="sourceLineNo">151</span> return supplier.buf;<a name="line.151"></a> |
| <span class="sourceLineNo">152</span> } else {<a name="line.152"></a> |
| <span class="sourceLineNo">153</span> return null;<a name="line.153"></a> |
| <span class="sourceLineNo">154</span> }<a name="line.154"></a> |
| <span class="sourceLineNo">155</span> }<a name="line.155"></a> |
| <span class="sourceLineNo">156</span><a name="line.156"></a> |
| <span class="sourceLineNo">157</span> private boolean buildCellBlock(final Codec codec, final CompressionCodec compressor,<a name="line.157"></a> |
| <span class="sourceLineNo">158</span> final CellScanner cellScanner, OutputStreamSupplier supplier) throws IOException {<a name="line.158"></a> |
| <span class="sourceLineNo">159</span> if (cellScanner == null) {<a name="line.159"></a> |
| <span class="sourceLineNo">160</span> return false;<a name="line.160"></a> |
| <span class="sourceLineNo">161</span> }<a name="line.161"></a> |
| <span class="sourceLineNo">162</span> if (codec == null) {<a name="line.162"></a> |
| <span class="sourceLineNo">163</span> throw new CellScannerButNoCodecException();<a name="line.163"></a> |
| <span class="sourceLineNo">164</span> }<a name="line.164"></a> |
| <span class="sourceLineNo">165</span> int bufferSize = cellBlockBuildingInitialBufferSize;<a name="line.165"></a> |
| <span class="sourceLineNo">166</span> encodeCellsTo(supplier.get(bufferSize), cellScanner, codec, compressor);<a name="line.166"></a> |
| <span class="sourceLineNo">167</span> if (LOG.isTraceEnabled() && bufferSize < supplier.size()) {<a name="line.167"></a> |
| <span class="sourceLineNo">168</span> LOG.trace("Buffer grew from initial bufferSize=" + bufferSize + " to " + supplier.size()<a name="line.168"></a> |
| <span class="sourceLineNo">169</span> + "; up hbase.ipc.cellblock.building.initial.buffersize?");<a name="line.169"></a> |
| <span class="sourceLineNo">170</span> }<a name="line.170"></a> |
| <span class="sourceLineNo">171</span> return true;<a name="line.171"></a> |
| <span class="sourceLineNo">172</span> }<a name="line.172"></a> |
| <span class="sourceLineNo">173</span><a name="line.173"></a> |
| <span class="sourceLineNo">174</span> private void encodeCellsTo(OutputStream os, CellScanner cellScanner, Codec codec,<a name="line.174"></a> |
| <span class="sourceLineNo">175</span> CompressionCodec compressor) throws IOException {<a name="line.175"></a> |
| <span class="sourceLineNo">176</span> Compressor poolCompressor = null;<a name="line.176"></a> |
| <span class="sourceLineNo">177</span> try {<a name="line.177"></a> |
| <span class="sourceLineNo">178</span> if (compressor != null) {<a name="line.178"></a> |
| <span class="sourceLineNo">179</span> if (compressor instanceof Configurable) {<a name="line.179"></a> |
| <span class="sourceLineNo">180</span> ((Configurable) compressor).setConf(this.conf);<a name="line.180"></a> |
| <span class="sourceLineNo">181</span> }<a name="line.181"></a> |
| <span class="sourceLineNo">182</span> poolCompressor = CodecPool.getCompressor(compressor);<a name="line.182"></a> |
| <span class="sourceLineNo">183</span> os = compressor.createOutputStream(os, poolCompressor);<a name="line.183"></a> |
| <span class="sourceLineNo">184</span> }<a name="line.184"></a> |
| <span class="sourceLineNo">185</span> Codec.Encoder encoder = codec.getEncoder(os);<a name="line.185"></a> |
| <span class="sourceLineNo">186</span> while (cellScanner.advance()) {<a name="line.186"></a> |
| <span class="sourceLineNo">187</span> encoder.write(cellScanner.current());<a name="line.187"></a> |
| <span class="sourceLineNo">188</span> }<a name="line.188"></a> |
| <span class="sourceLineNo">189</span> encoder.flush();<a name="line.189"></a> |
| <span class="sourceLineNo">190</span> } catch (BufferOverflowException | IndexOutOfBoundsException e) {<a name="line.190"></a> |
| <span class="sourceLineNo">191</span> throw new DoNotRetryIOException(e);<a name="line.191"></a> |
| <span class="sourceLineNo">192</span> } finally {<a name="line.192"></a> |
| <span class="sourceLineNo">193</span> os.close();<a name="line.193"></a> |
| <span class="sourceLineNo">194</span> if (poolCompressor != null) {<a name="line.194"></a> |
| <span class="sourceLineNo">195</span> CodecPool.returnCompressor(poolCompressor);<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> }<a name="line.198"></a> |
| <span class="sourceLineNo">199</span><a name="line.199"></a> |
| <span class="sourceLineNo">200</span> /**<a name="line.200"></a> |
| <span class="sourceLineNo">201</span> * Puts CellScanner Cells into a cell block using passed in <code>codec</code> and/or<a name="line.201"></a> |
| <span class="sourceLineNo">202</span> * <code>compressor</code>.<a name="line.202"></a> |
| <span class="sourceLineNo">203</span> * @param codec to use for encoding<a name="line.203"></a> |
| <span class="sourceLineNo">204</span> * @param compressor to use for encoding<a name="line.204"></a> |
| <span class="sourceLineNo">205</span> * @param cellScanner to encode<a name="line.205"></a> |
| <span class="sourceLineNo">206</span> * @param allocator to allocate the {@link ByteBuff}.<a name="line.206"></a> |
| <span class="sourceLineNo">207</span> * @return Null or byte buffer filled with a cellblock filled with passed-in Cells encoded using<a name="line.207"></a> |
| <span class="sourceLineNo">208</span> * passed in <code>codec</code> and/or <code>compressor</code>; the returned buffer has<a name="line.208"></a> |
| <span class="sourceLineNo">209</span> * been flipped and is ready for reading. Use limit to find total size. If<a name="line.209"></a> |
| <span class="sourceLineNo">210</span> * <code>pool</code> was not null, then this returned ByteBuffer came from there and<a name="line.210"></a> |
| <span class="sourceLineNo">211</span> * should be returned to the pool when done.<a name="line.211"></a> |
| <span class="sourceLineNo">212</span> * @throws IOException if encoding the cells fail<a name="line.212"></a> |
| <span class="sourceLineNo">213</span> */<a name="line.213"></a> |
| <span class="sourceLineNo">214</span> public ByteBufferListOutputStream buildCellBlockStream(Codec codec, CompressionCodec compressor,<a name="line.214"></a> |
| <span class="sourceLineNo">215</span> CellScanner cellScanner, ByteBuffAllocator allocator) throws IOException {<a name="line.215"></a> |
| <span class="sourceLineNo">216</span> if (cellScanner == null) {<a name="line.216"></a> |
| <span class="sourceLineNo">217</span> return null;<a name="line.217"></a> |
| <span class="sourceLineNo">218</span> }<a name="line.218"></a> |
| <span class="sourceLineNo">219</span> if (codec == null) {<a name="line.219"></a> |
| <span class="sourceLineNo">220</span> throw new CellScannerButNoCodecException();<a name="line.220"></a> |
| <span class="sourceLineNo">221</span> }<a name="line.221"></a> |
| <span class="sourceLineNo">222</span> ByteBufferListOutputStream bbos = new ByteBufferListOutputStream(allocator);<a name="line.222"></a> |
| <span class="sourceLineNo">223</span> encodeCellsTo(bbos, cellScanner, codec, compressor);<a name="line.223"></a> |
| <span class="sourceLineNo">224</span> if (bbos.size() == 0) {<a name="line.224"></a> |
| <span class="sourceLineNo">225</span> bbos.releaseResources();<a name="line.225"></a> |
| <span class="sourceLineNo">226</span> return null;<a name="line.226"></a> |
| <span class="sourceLineNo">227</span> }<a name="line.227"></a> |
| <span class="sourceLineNo">228</span> return bbos;<a name="line.228"></a> |
| <span class="sourceLineNo">229</span> }<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> * Create a cell scanner.<a name="line.232"></a> |
| <span class="sourceLineNo">233</span> * @param codec to use for cellblock<a name="line.233"></a> |
| <span class="sourceLineNo">234</span> * @param cellBlock to encode<a name="line.234"></a> |
| <span class="sourceLineNo">235</span> * @return CellScanner to work against the content of <code>cellBlock</code><a name="line.235"></a> |
| <span class="sourceLineNo">236</span> * @throws IOException if encoding fails<a name="line.236"></a> |
| <span class="sourceLineNo">237</span> */<a name="line.237"></a> |
| <span class="sourceLineNo">238</span> public CellScanner createCellScanner(final Codec codec, final CompressionCodec compressor,<a name="line.238"></a> |
| <span class="sourceLineNo">239</span> final byte[] cellBlock) throws IOException {<a name="line.239"></a> |
| <span class="sourceLineNo">240</span> // Use this method from Client side to create the CellScanner<a name="line.240"></a> |
| <span class="sourceLineNo">241</span> if (compressor != null) {<a name="line.241"></a> |
| <span class="sourceLineNo">242</span> ByteBuffer cellBlockBuf = decompress(compressor, cellBlock);<a name="line.242"></a> |
| <span class="sourceLineNo">243</span> return codec.getDecoder(new ByteBufferInputStream(cellBlockBuf));<a name="line.243"></a> |
| <span class="sourceLineNo">244</span> }<a name="line.244"></a> |
| <span class="sourceLineNo">245</span> // Not making the Decoder over the ByteBuffer purposefully. The Decoder over the BB will<a name="line.245"></a> |
| <span class="sourceLineNo">246</span> // make Cells directly over the passed BB. This method is called at client side and we don't<a name="line.246"></a> |
| <span class="sourceLineNo">247</span> // want the Cells to share the same byte[] where the RPC response is being read. Caching of any<a name="line.247"></a> |
| <span class="sourceLineNo">248</span> // of the Cells at user's app level will make it not possible to GC the response byte[]<a name="line.248"></a> |
| <span class="sourceLineNo">249</span> return codec.getDecoder(new ByteArrayInputStream(cellBlock));<a name="line.249"></a> |
| <span class="sourceLineNo">250</span> }<a name="line.250"></a> |
| <span class="sourceLineNo">251</span><a name="line.251"></a> |
| <span class="sourceLineNo">252</span> /**<a name="line.252"></a> |
| <span class="sourceLineNo">253</span> * Create a cell scanner using an existing bytebuff.<a name="line.253"></a> |
| <span class="sourceLineNo">254</span> * @param codec to use for cellblock<a name="line.254"></a> |
| <span class="sourceLineNo">255</span> * @param cellBlock ByteBuffer containing the cells written by the Codec. The buffer should be<a name="line.255"></a> |
| <span class="sourceLineNo">256</span> * position()'ed at the start of the cell block and limit()'ed at the end.<a name="line.256"></a> |
| <span class="sourceLineNo">257</span> * @return CellScanner to work against the content of <code>cellBlock</code>. All cells created<a name="line.257"></a> |
| <span class="sourceLineNo">258</span> * out of the CellScanner will share the same ByteBuffer being passed.<a name="line.258"></a> |
| <span class="sourceLineNo">259</span> * @throws IOException if cell encoding fails<a name="line.259"></a> |
| <span class="sourceLineNo">260</span> */<a name="line.260"></a> |
| <span class="sourceLineNo">261</span> public CellScanner createCellScannerReusingBuffers(final Codec codec,<a name="line.261"></a> |
| <span class="sourceLineNo">262</span> final CompressionCodec compressor, ByteBuff cellBlock) throws IOException {<a name="line.262"></a> |
| <span class="sourceLineNo">263</span> // Use this method from HRS to create the CellScanner<a name="line.263"></a> |
| <span class="sourceLineNo">264</span> // If compressed, decompress it first before passing it on else we will leak compression<a name="line.264"></a> |
| <span class="sourceLineNo">265</span> // resources if the stream is not closed properly after we let it out.<a name="line.265"></a> |
| <span class="sourceLineNo">266</span> if (compressor != null) {<a name="line.266"></a> |
| <span class="sourceLineNo">267</span> cellBlock = decompress(compressor, cellBlock);<a name="line.267"></a> |
| <span class="sourceLineNo">268</span> }<a name="line.268"></a> |
| <span class="sourceLineNo">269</span> return codec.getDecoder(cellBlock);<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> private ByteBuffer decompress(CompressionCodec compressor, byte[] compressedCellBlock)<a name="line.272"></a> |
| <span class="sourceLineNo">273</span> throws IOException {<a name="line.273"></a> |
| <span class="sourceLineNo">274</span> ByteBuffer cellBlock = decompress(compressor, new ByteArrayInputStream(compressedCellBlock),<a name="line.274"></a> |
| <span class="sourceLineNo">275</span> compressedCellBlock.length * this.cellBlockDecompressionMultiplier);<a name="line.275"></a> |
| <span class="sourceLineNo">276</span> return cellBlock;<a name="line.276"></a> |
| <span class="sourceLineNo">277</span> }<a name="line.277"></a> |
| <span class="sourceLineNo">278</span><a name="line.278"></a> |
| <span class="sourceLineNo">279</span> private ByteBuff decompress(CompressionCodec compressor, ByteBuff compressedCellBlock)<a name="line.279"></a> |
| <span class="sourceLineNo">280</span> throws IOException {<a name="line.280"></a> |
| <span class="sourceLineNo">281</span> ByteBuffer cellBlock = decompress(compressor, new ByteBuffInputStream(compressedCellBlock),<a name="line.281"></a> |
| <span class="sourceLineNo">282</span> compressedCellBlock.remaining() * this.cellBlockDecompressionMultiplier);<a name="line.282"></a> |
| <span class="sourceLineNo">283</span> return new SingleByteBuff(cellBlock);<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> private ByteBuffer decompress(CompressionCodec compressor, InputStream cellBlockStream,<a name="line.286"></a> |
| <span class="sourceLineNo">287</span> int osInitialSize) throws IOException {<a name="line.287"></a> |
| <span class="sourceLineNo">288</span> // GZIPCodec fails w/ NPE if no configuration.<a name="line.288"></a> |
| <span class="sourceLineNo">289</span> if (compressor instanceof Configurable) {<a name="line.289"></a> |
| <span class="sourceLineNo">290</span> ((Configurable) compressor).setConf(this.conf);<a name="line.290"></a> |
| <span class="sourceLineNo">291</span> }<a name="line.291"></a> |
| <span class="sourceLineNo">292</span> Decompressor poolDecompressor = CodecPool.getDecompressor(compressor);<a name="line.292"></a> |
| <span class="sourceLineNo">293</span> CompressionInputStream cis = compressor.createInputStream(cellBlockStream, poolDecompressor);<a name="line.293"></a> |
| <span class="sourceLineNo">294</span> ByteBufferOutputStream bbos;<a name="line.294"></a> |
| <span class="sourceLineNo">295</span> try {<a name="line.295"></a> |
| <span class="sourceLineNo">296</span> // TODO: This is ugly. The buffer will be resized on us if we guess wrong.<a name="line.296"></a> |
| <span class="sourceLineNo">297</span> // TODO: Reuse buffers.<a name="line.297"></a> |
| <span class="sourceLineNo">298</span> bbos = new ByteBufferOutputStream(osInitialSize);<a name="line.298"></a> |
| <span class="sourceLineNo">299</span> IOUtils.copy(cis, bbos);<a name="line.299"></a> |
| <span class="sourceLineNo">300</span> bbos.close();<a name="line.300"></a> |
| <span class="sourceLineNo">301</span> return bbos.getByteBuffer();<a name="line.301"></a> |
| <span class="sourceLineNo">302</span> } finally {<a name="line.302"></a> |
| <span class="sourceLineNo">303</span> CodecPool.returnDecompressor(poolDecompressor);<a name="line.303"></a> |
| <span class="sourceLineNo">304</span> }<a name="line.304"></a> |
| <span class="sourceLineNo">305</span> }<a name="line.305"></a> |
| <span class="sourceLineNo">306</span>}<a name="line.306"></a> |
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| </div> |
| </body> |
| </html> |
