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| <pre><span class="source-line-no">001</span><span id="line-1">/*</span> |
| <span class="source-line-no">002</span><span id="line-2"> * Licensed to the Apache Software Foundation (ASF) under one</span> |
| <span class="source-line-no">003</span><span id="line-3"> * or more contributor license agreements. See the NOTICE file</span> |
| <span class="source-line-no">004</span><span id="line-4"> * distributed with this work for additional information</span> |
| <span class="source-line-no">005</span><span id="line-5"> * regarding copyright ownership. The ASF licenses this file</span> |
| <span class="source-line-no">006</span><span id="line-6"> * to you under the Apache License, Version 2.0 (the</span> |
| <span class="source-line-no">007</span><span id="line-7"> * "License"); you may not use this file except in compliance</span> |
| <span class="source-line-no">008</span><span id="line-8"> * with the License. You may obtain a copy of the License at</span> |
| <span class="source-line-no">009</span><span id="line-9"> *</span> |
| <span class="source-line-no">010</span><span id="line-10"> * http://www.apache.org/licenses/LICENSE-2.0</span> |
| <span class="source-line-no">011</span><span id="line-11"> *</span> |
| <span class="source-line-no">012</span><span id="line-12"> * Unless required by applicable law or agreed to in writing, software</span> |
| <span class="source-line-no">013</span><span id="line-13"> * distributed under the License is distributed on an "AS IS" BASIS,</span> |
| <span class="source-line-no">014</span><span id="line-14"> * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.</span> |
| <span class="source-line-no">015</span><span id="line-15"> * See the License for the specific language governing permissions and</span> |
| <span class="source-line-no">016</span><span id="line-16"> * limitations under the License.</span> |
| <span class="source-line-no">017</span><span id="line-17"> */</span> |
| <span class="source-line-no">018</span><span id="line-18">package org.apache.hadoop.hbase.ipc;</span> |
| <span class="source-line-no">019</span><span id="line-19"></span> |
| <span class="source-line-no">020</span><span id="line-20">import java.io.ByteArrayInputStream;</span> |
| <span class="source-line-no">021</span><span id="line-21">import java.io.IOException;</span> |
| <span class="source-line-no">022</span><span id="line-22">import java.io.InputStream;</span> |
| <span class="source-line-no">023</span><span id="line-23">import java.io.OutputStream;</span> |
| <span class="source-line-no">024</span><span id="line-24">import java.nio.BufferOverflowException;</span> |
| <span class="source-line-no">025</span><span id="line-25">import java.nio.ByteBuffer;</span> |
| <span class="source-line-no">026</span><span id="line-26">import org.apache.commons.io.IOUtils;</span> |
| <span class="source-line-no">027</span><span id="line-27">import org.apache.hadoop.conf.Configurable;</span> |
| <span class="source-line-no">028</span><span id="line-28">import org.apache.hadoop.conf.Configuration;</span> |
| <span class="source-line-no">029</span><span id="line-29">import org.apache.hadoop.hbase.DoNotRetryIOException;</span> |
| <span class="source-line-no">030</span><span id="line-30">import org.apache.hadoop.hbase.ExtendedCellScanner;</span> |
| <span class="source-line-no">031</span><span id="line-31">import org.apache.hadoop.hbase.codec.Codec;</span> |
| <span class="source-line-no">032</span><span id="line-32">import org.apache.hadoop.hbase.io.ByteBuffAllocator;</span> |
| <span class="source-line-no">033</span><span id="line-33">import org.apache.hadoop.hbase.io.ByteBuffInputStream;</span> |
| <span class="source-line-no">034</span><span id="line-34">import org.apache.hadoop.hbase.io.ByteBufferInputStream;</span> |
| <span class="source-line-no">035</span><span id="line-35">import org.apache.hadoop.hbase.io.ByteBufferListOutputStream;</span> |
| <span class="source-line-no">036</span><span id="line-36">import org.apache.hadoop.hbase.io.ByteBufferOutputStream;</span> |
| <span class="source-line-no">037</span><span id="line-37">import org.apache.hadoop.hbase.nio.ByteBuff;</span> |
| <span class="source-line-no">038</span><span id="line-38">import org.apache.hadoop.hbase.nio.SingleByteBuff;</span> |
| <span class="source-line-no">039</span><span id="line-39">import org.apache.hadoop.hbase.util.ClassSize;</span> |
| <span class="source-line-no">040</span><span id="line-40">import org.apache.hadoop.io.compress.CodecPool;</span> |
| <span class="source-line-no">041</span><span id="line-41">import org.apache.hadoop.io.compress.CompressionCodec;</span> |
| <span class="source-line-no">042</span><span id="line-42">import org.apache.hadoop.io.compress.CompressionInputStream;</span> |
| <span class="source-line-no">043</span><span id="line-43">import org.apache.hadoop.io.compress.Compressor;</span> |
| <span class="source-line-no">044</span><span id="line-44">import org.apache.hadoop.io.compress.Decompressor;</span> |
| <span class="source-line-no">045</span><span id="line-45">import org.apache.yetus.audience.InterfaceAudience;</span> |
| <span class="source-line-no">046</span><span id="line-46">import org.slf4j.Logger;</span> |
| <span class="source-line-no">047</span><span id="line-47">import org.slf4j.LoggerFactory;</span> |
| <span class="source-line-no">048</span><span id="line-48"></span> |
| <span class="source-line-no">049</span><span id="line-49">import org.apache.hbase.thirdparty.io.netty.buffer.ByteBuf;</span> |
| <span class="source-line-no">050</span><span id="line-50">import org.apache.hbase.thirdparty.io.netty.buffer.ByteBufAllocator;</span> |
| <span class="source-line-no">051</span><span id="line-51">import org.apache.hbase.thirdparty.io.netty.buffer.ByteBufOutputStream;</span> |
| <span class="source-line-no">052</span><span id="line-52"></span> |
| <span class="source-line-no">053</span><span id="line-53">/**</span> |
| <span class="source-line-no">054</span><span id="line-54"> * Helper class for building cell block.</span> |
| <span class="source-line-no">055</span><span id="line-55"> */</span> |
| <span class="source-line-no">056</span><span id="line-56">@InterfaceAudience.Private</span> |
| <span class="source-line-no">057</span><span id="line-57">class CellBlockBuilder {</span> |
| <span class="source-line-no">058</span><span id="line-58"></span> |
| <span class="source-line-no">059</span><span id="line-59"> // LOG is being used in TestCellBlockBuilder</span> |
| <span class="source-line-no">060</span><span id="line-60"> static final Logger LOG = LoggerFactory.getLogger(CellBlockBuilder.class);</span> |
| <span class="source-line-no">061</span><span id="line-61"></span> |
| <span class="source-line-no">062</span><span id="line-62"> private final Configuration conf;</span> |
| <span class="source-line-no">063</span><span id="line-63"></span> |
| <span class="source-line-no">064</span><span id="line-64"> /**</span> |
| <span class="source-line-no">065</span><span id="line-65"> * How much we think the decompressor will expand the original compressed content.</span> |
| <span class="source-line-no">066</span><span id="line-66"> */</span> |
| <span class="source-line-no">067</span><span id="line-67"> private final int cellBlockDecompressionMultiplier;</span> |
| <span class="source-line-no">068</span><span id="line-68"></span> |
| <span class="source-line-no">069</span><span id="line-69"> private final int cellBlockBuildingInitialBufferSize;</span> |
| <span class="source-line-no">070</span><span id="line-70"></span> |
| <span class="source-line-no">071</span><span id="line-71"> public CellBlockBuilder(Configuration conf) {</span> |
| <span class="source-line-no">072</span><span id="line-72"> this.conf = conf;</span> |
| <span class="source-line-no">073</span><span id="line-73"> this.cellBlockDecompressionMultiplier =</span> |
| <span class="source-line-no">074</span><span id="line-74"> conf.getInt("hbase.ipc.cellblock.decompression.buffersize.multiplier", 3);</span> |
| <span class="source-line-no">075</span><span id="line-75"></span> |
| <span class="source-line-no">076</span><span id="line-76"> // Guess that 16k is a good size for rpc buffer. Could go bigger. See the TODO below in</span> |
| <span class="source-line-no">077</span><span id="line-77"> // #buildCellBlock.</span> |
| <span class="source-line-no">078</span><span id="line-78"> this.cellBlockBuildingInitialBufferSize =</span> |
| <span class="source-line-no">079</span><span id="line-79"> ClassSize.align(conf.getInt("hbase.ipc.cellblock.building.initial.buffersize", 16 * 1024));</span> |
| <span class="source-line-no">080</span><span id="line-80"> }</span> |
| <span class="source-line-no">081</span><span id="line-81"></span> |
| <span class="source-line-no">082</span><span id="line-82"> private interface OutputStreamSupplier {</span> |
| <span class="source-line-no">083</span><span id="line-83"></span> |
| <span class="source-line-no">084</span><span id="line-84"> OutputStream get(int expectedSize);</span> |
| <span class="source-line-no">085</span><span id="line-85"></span> |
| <span class="source-line-no">086</span><span id="line-86"> int size();</span> |
| <span class="source-line-no">087</span><span id="line-87"> }</span> |
| <span class="source-line-no">088</span><span id="line-88"></span> |
| <span class="source-line-no">089</span><span id="line-89"> private static final class ByteBufferOutputStreamSupplier implements OutputStreamSupplier {</span> |
| <span class="source-line-no">090</span><span id="line-90"></span> |
| <span class="source-line-no">091</span><span id="line-91"> private ByteBufferOutputStream baos;</span> |
| <span class="source-line-no">092</span><span id="line-92"></span> |
| <span class="source-line-no">093</span><span id="line-93"> @Override</span> |
| <span class="source-line-no">094</span><span id="line-94"> public OutputStream get(int expectedSize) {</span> |
| <span class="source-line-no">095</span><span id="line-95"> baos = new ByteBufferOutputStream(expectedSize);</span> |
| <span class="source-line-no">096</span><span id="line-96"> return baos;</span> |
| <span class="source-line-no">097</span><span id="line-97"> }</span> |
| <span class="source-line-no">098</span><span id="line-98"></span> |
| <span class="source-line-no">099</span><span id="line-99"> @Override</span> |
| <span class="source-line-no">100</span><span id="line-100"> public int size() {</span> |
| <span class="source-line-no">101</span><span id="line-101"> return baos.size();</span> |
| <span class="source-line-no">102</span><span id="line-102"> }</span> |
| <span class="source-line-no">103</span><span id="line-103"> }</span> |
| <span class="source-line-no">104</span><span id="line-104"></span> |
| <span class="source-line-no">105</span><span id="line-105"> /**</span> |
| <span class="source-line-no">106</span><span id="line-106"> * Puts CellScanner Cells into a cell block using passed in <code>codec</code> and/or</span> |
| <span class="source-line-no">107</span><span id="line-107"> * <code>compressor</code>.</span> |
| <span class="source-line-no">108</span><span id="line-108"> * @return Null or byte buffer filled with a cellblock filled with passed-in Cells encoded using</span> |
| <span class="source-line-no">109</span><span id="line-109"> * passed in <code>codec</code> and/or <code>compressor</code>; the returned buffer has</span> |
| <span class="source-line-no">110</span><span id="line-110"> * been flipped and is ready for reading. Use limit to find total size.</span> |
| <span class="source-line-no">111</span><span id="line-111"> */</span> |
| <span class="source-line-no">112</span><span id="line-112"> public ByteBuffer buildCellBlock(final Codec codec, final CompressionCodec compressor,</span> |
| <span class="source-line-no">113</span><span id="line-113"> final ExtendedCellScanner cellScanner) throws IOException {</span> |
| <span class="source-line-no">114</span><span id="line-114"> ByteBufferOutputStreamSupplier supplier = new ByteBufferOutputStreamSupplier();</span> |
| <span class="source-line-no">115</span><span id="line-115"> if (buildCellBlock(codec, compressor, cellScanner, supplier)) {</span> |
| <span class="source-line-no">116</span><span id="line-116"> ByteBuffer bb = supplier.baos.getByteBuffer();</span> |
| <span class="source-line-no">117</span><span id="line-117"> // If no cells, don't mess around. Just return null (could be a bunch of existence checking</span> |
| <span class="source-line-no">118</span><span id="line-118"> // gets or something -- stuff that does not return a cell).</span> |
| <span class="source-line-no">119</span><span id="line-119"> return bb.hasRemaining() ? bb : null;</span> |
| <span class="source-line-no">120</span><span id="line-120"> } else {</span> |
| <span class="source-line-no">121</span><span id="line-121"> return null;</span> |
| <span class="source-line-no">122</span><span id="line-122"> }</span> |
| <span class="source-line-no">123</span><span id="line-123"> }</span> |
| <span class="source-line-no">124</span><span id="line-124"></span> |
| <span class="source-line-no">125</span><span id="line-125"> private static final class ByteBufOutputStreamSupplier implements OutputStreamSupplier {</span> |
| <span class="source-line-no">126</span><span id="line-126"></span> |
| <span class="source-line-no">127</span><span id="line-127"> private final ByteBufAllocator alloc;</span> |
| <span class="source-line-no">128</span><span id="line-128"></span> |
| <span class="source-line-no">129</span><span id="line-129"> private ByteBuf buf;</span> |
| <span class="source-line-no">130</span><span id="line-130"></span> |
| <span class="source-line-no">131</span><span id="line-131"> public ByteBufOutputStreamSupplier(ByteBufAllocator alloc) {</span> |
| <span class="source-line-no">132</span><span id="line-132"> this.alloc = alloc;</span> |
| <span class="source-line-no">133</span><span id="line-133"> }</span> |
| <span class="source-line-no">134</span><span id="line-134"></span> |
| <span class="source-line-no">135</span><span id="line-135"> @Override</span> |
| <span class="source-line-no">136</span><span id="line-136"> public OutputStream get(int expectedSize) {</span> |
| <span class="source-line-no">137</span><span id="line-137"> buf = alloc.buffer(expectedSize);</span> |
| <span class="source-line-no">138</span><span id="line-138"> return new ByteBufOutputStream(buf);</span> |
| <span class="source-line-no">139</span><span id="line-139"> }</span> |
| <span class="source-line-no">140</span><span id="line-140"></span> |
| <span class="source-line-no">141</span><span id="line-141"> @Override</span> |
| <span class="source-line-no">142</span><span id="line-142"> public int size() {</span> |
| <span class="source-line-no">143</span><span id="line-143"> return buf.writerIndex();</span> |
| <span class="source-line-no">144</span><span id="line-144"> }</span> |
| <span class="source-line-no">145</span><span id="line-145"> }</span> |
| <span class="source-line-no">146</span><span id="line-146"></span> |
| <span class="source-line-no">147</span><span id="line-147"> public ByteBuf buildCellBlock(Codec codec, CompressionCodec compressor,</span> |
| <span class="source-line-no">148</span><span id="line-148"> ExtendedCellScanner cellScanner, ByteBufAllocator alloc) throws IOException {</span> |
| <span class="source-line-no">149</span><span id="line-149"> ByteBufOutputStreamSupplier supplier = new ByteBufOutputStreamSupplier(alloc);</span> |
| <span class="source-line-no">150</span><span id="line-150"> if (buildCellBlock(codec, compressor, cellScanner, supplier)) {</span> |
| <span class="source-line-no">151</span><span id="line-151"> return supplier.buf;</span> |
| <span class="source-line-no">152</span><span id="line-152"> } else {</span> |
| <span class="source-line-no">153</span><span id="line-153"> return null;</span> |
| <span class="source-line-no">154</span><span id="line-154"> }</span> |
| <span class="source-line-no">155</span><span id="line-155"> }</span> |
| <span class="source-line-no">156</span><span id="line-156"></span> |
| <span class="source-line-no">157</span><span id="line-157"> private boolean buildCellBlock(final Codec codec, final CompressionCodec compressor,</span> |
| <span class="source-line-no">158</span><span id="line-158"> final ExtendedCellScanner cellScanner, OutputStreamSupplier supplier) throws IOException {</span> |
| <span class="source-line-no">159</span><span id="line-159"> if (cellScanner == null) {</span> |
| <span class="source-line-no">160</span><span id="line-160"> return false;</span> |
| <span class="source-line-no">161</span><span id="line-161"> }</span> |
| <span class="source-line-no">162</span><span id="line-162"> if (codec == null) {</span> |
| <span class="source-line-no">163</span><span id="line-163"> throw new CellScannerButNoCodecException();</span> |
| <span class="source-line-no">164</span><span id="line-164"> }</span> |
| <span class="source-line-no">165</span><span id="line-165"> int bufferSize = cellBlockBuildingInitialBufferSize;</span> |
| <span class="source-line-no">166</span><span id="line-166"> encodeCellsTo(supplier.get(bufferSize), cellScanner, codec, compressor);</span> |
| <span class="source-line-no">167</span><span id="line-167"> if (LOG.isTraceEnabled() && bufferSize < supplier.size()) {</span> |
| <span class="source-line-no">168</span><span id="line-168"> LOG.trace("Buffer grew from initial bufferSize=" + bufferSize + " to " + supplier.size()</span> |
| <span class="source-line-no">169</span><span id="line-169"> + "; up hbase.ipc.cellblock.building.initial.buffersize?");</span> |
| <span class="source-line-no">170</span><span id="line-170"> }</span> |
| <span class="source-line-no">171</span><span id="line-171"> return true;</span> |
| <span class="source-line-no">172</span><span id="line-172"> }</span> |
| <span class="source-line-no">173</span><span id="line-173"></span> |
| <span class="source-line-no">174</span><span id="line-174"> private void encodeCellsTo(OutputStream os, ExtendedCellScanner cellScanner, Codec codec,</span> |
| <span class="source-line-no">175</span><span id="line-175"> CompressionCodec compressor) throws IOException {</span> |
| <span class="source-line-no">176</span><span id="line-176"> Compressor poolCompressor = null;</span> |
| <span class="source-line-no">177</span><span id="line-177"> try {</span> |
| <span class="source-line-no">178</span><span id="line-178"> if (compressor != null) {</span> |
| <span class="source-line-no">179</span><span id="line-179"> if (compressor instanceof Configurable) {</span> |
| <span class="source-line-no">180</span><span id="line-180"> ((Configurable) compressor).setConf(this.conf);</span> |
| <span class="source-line-no">181</span><span id="line-181"> }</span> |
| <span class="source-line-no">182</span><span id="line-182"> poolCompressor = CodecPool.getCompressor(compressor);</span> |
| <span class="source-line-no">183</span><span id="line-183"> os = compressor.createOutputStream(os, poolCompressor);</span> |
| <span class="source-line-no">184</span><span id="line-184"> }</span> |
| <span class="source-line-no">185</span><span id="line-185"> Codec.Encoder encoder = codec.getEncoder(os);</span> |
| <span class="source-line-no">186</span><span id="line-186"> while (cellScanner.advance()) {</span> |
| <span class="source-line-no">187</span><span id="line-187"> encoder.write(cellScanner.current());</span> |
| <span class="source-line-no">188</span><span id="line-188"> }</span> |
| <span class="source-line-no">189</span><span id="line-189"> encoder.flush();</span> |
| <span class="source-line-no">190</span><span id="line-190"> } catch (BufferOverflowException | IndexOutOfBoundsException e) {</span> |
| <span class="source-line-no">191</span><span id="line-191"> throw new DoNotRetryIOException(e);</span> |
| <span class="source-line-no">192</span><span id="line-192"> } finally {</span> |
| <span class="source-line-no">193</span><span id="line-193"> os.close();</span> |
| <span class="source-line-no">194</span><span id="line-194"> if (poolCompressor != null) {</span> |
| <span class="source-line-no">195</span><span id="line-195"> CodecPool.returnCompressor(poolCompressor);</span> |
| <span class="source-line-no">196</span><span id="line-196"> }</span> |
| <span class="source-line-no">197</span><span id="line-197"> }</span> |
| <span class="source-line-no">198</span><span id="line-198"> }</span> |
| <span class="source-line-no">199</span><span id="line-199"></span> |
| <span class="source-line-no">200</span><span id="line-200"> /**</span> |
| <span class="source-line-no">201</span><span id="line-201"> * Puts CellScanner Cells into a cell block using passed in <code>codec</code> and/or</span> |
| <span class="source-line-no">202</span><span id="line-202"> * <code>compressor</code>.</span> |
| <span class="source-line-no">203</span><span id="line-203"> * @param codec to use for encoding</span> |
| <span class="source-line-no">204</span><span id="line-204"> * @param compressor to use for encoding</span> |
| <span class="source-line-no">205</span><span id="line-205"> * @param cellScanner to encode</span> |
| <span class="source-line-no">206</span><span id="line-206"> * @param allocator to allocate the {@link ByteBuff}.</span> |
| <span class="source-line-no">207</span><span id="line-207"> * @return Null or byte buffer filled with a cellblock filled with passed-in Cells encoded using</span> |
| <span class="source-line-no">208</span><span id="line-208"> * passed in <code>codec</code> and/or <code>compressor</code>; the returned buffer has</span> |
| <span class="source-line-no">209</span><span id="line-209"> * been flipped and is ready for reading. Use limit to find total size. If</span> |
| <span class="source-line-no">210</span><span id="line-210"> * <code>pool</code> was not null, then this returned ByteBuffer came from there and</span> |
| <span class="source-line-no">211</span><span id="line-211"> * should be returned to the pool when done.</span> |
| <span class="source-line-no">212</span><span id="line-212"> * @throws IOException if encoding the cells fail</span> |
| <span class="source-line-no">213</span><span id="line-213"> */</span> |
| <span class="source-line-no">214</span><span id="line-214"> public ByteBufferListOutputStream buildCellBlockStream(Codec codec, CompressionCodec compressor,</span> |
| <span class="source-line-no">215</span><span id="line-215"> ExtendedCellScanner cellScanner, ByteBuffAllocator allocator) throws IOException {</span> |
| <span class="source-line-no">216</span><span id="line-216"> if (cellScanner == null) {</span> |
| <span class="source-line-no">217</span><span id="line-217"> return null;</span> |
| <span class="source-line-no">218</span><span id="line-218"> }</span> |
| <span class="source-line-no">219</span><span id="line-219"> if (codec == null) {</span> |
| <span class="source-line-no">220</span><span id="line-220"> throw new CellScannerButNoCodecException();</span> |
| <span class="source-line-no">221</span><span id="line-221"> }</span> |
| <span class="source-line-no">222</span><span id="line-222"> ByteBufferListOutputStream bbos = new ByteBufferListOutputStream(allocator);</span> |
| <span class="source-line-no">223</span><span id="line-223"> encodeCellsTo(bbos, cellScanner, codec, compressor);</span> |
| <span class="source-line-no">224</span><span id="line-224"> if (bbos.size() == 0) {</span> |
| <span class="source-line-no">225</span><span id="line-225"> bbos.releaseResources();</span> |
| <span class="source-line-no">226</span><span id="line-226"> return null;</span> |
| <span class="source-line-no">227</span><span id="line-227"> }</span> |
| <span class="source-line-no">228</span><span id="line-228"> return bbos;</span> |
| <span class="source-line-no">229</span><span id="line-229"> }</span> |
| <span class="source-line-no">230</span><span id="line-230"></span> |
| <span class="source-line-no">231</span><span id="line-231"> /**</span> |
| <span class="source-line-no">232</span><span id="line-232"> * Create a cell scanner.</span> |
| <span class="source-line-no">233</span><span id="line-233"> * @param codec to use for cellblock</span> |
| <span class="source-line-no">234</span><span id="line-234"> * @param cellBlock to encode</span> |
| <span class="source-line-no">235</span><span id="line-235"> * @return CellScanner to work against the content of <code>cellBlock</code></span> |
| <span class="source-line-no">236</span><span id="line-236"> * @throws IOException if encoding fails</span> |
| <span class="source-line-no">237</span><span id="line-237"> */</span> |
| <span class="source-line-no">238</span><span id="line-238"> public ExtendedCellScanner createCellScanner(final Codec codec, final CompressionCodec compressor,</span> |
| <span class="source-line-no">239</span><span id="line-239"> final byte[] cellBlock) throws IOException {</span> |
| <span class="source-line-no">240</span><span id="line-240"> // Use this method from Client side to create the CellScanner</span> |
| <span class="source-line-no">241</span><span id="line-241"> if (compressor != null) {</span> |
| <span class="source-line-no">242</span><span id="line-242"> ByteBuffer cellBlockBuf = decompress(compressor, cellBlock);</span> |
| <span class="source-line-no">243</span><span id="line-243"> return codec.getDecoder(new ByteBufferInputStream(cellBlockBuf));</span> |
| <span class="source-line-no">244</span><span id="line-244"> }</span> |
| <span class="source-line-no">245</span><span id="line-245"> // Not making the Decoder over the ByteBuffer purposefully. The Decoder over the BB will</span> |
| <span class="source-line-no">246</span><span id="line-246"> // make Cells directly over the passed BB. This method is called at client side and we don't</span> |
| <span class="source-line-no">247</span><span id="line-247"> // want the Cells to share the same byte[] where the RPC response is being read. Caching of any</span> |
| <span class="source-line-no">248</span><span id="line-248"> // of the Cells at user's app level will make it not possible to GC the response byte[]</span> |
| <span class="source-line-no">249</span><span id="line-249"> return codec.getDecoder(new ByteArrayInputStream(cellBlock));</span> |
| <span class="source-line-no">250</span><span id="line-250"> }</span> |
| <span class="source-line-no">251</span><span id="line-251"></span> |
| <span class="source-line-no">252</span><span id="line-252"> /**</span> |
| <span class="source-line-no">253</span><span id="line-253"> * Create a cell scanner using an existing bytebuff.</span> |
| <span class="source-line-no">254</span><span id="line-254"> * @param codec to use for cellblock</span> |
| <span class="source-line-no">255</span><span id="line-255"> * @param cellBlock ByteBuffer containing the cells written by the Codec. The buffer should be</span> |
| <span class="source-line-no">256</span><span id="line-256"> * position()'ed at the start of the cell block and limit()'ed at the end.</span> |
| <span class="source-line-no">257</span><span id="line-257"> * @return CellScanner to work against the content of <code>cellBlock</code>. All cells created</span> |
| <span class="source-line-no">258</span><span id="line-258"> * out of the CellScanner will share the same ByteBuffer being passed.</span> |
| <span class="source-line-no">259</span><span id="line-259"> * @throws IOException if cell encoding fails</span> |
| <span class="source-line-no">260</span><span id="line-260"> */</span> |
| <span class="source-line-no">261</span><span id="line-261"> public ExtendedCellScanner createCellScannerReusingBuffers(final Codec codec,</span> |
| <span class="source-line-no">262</span><span id="line-262"> final CompressionCodec compressor, ByteBuff cellBlock) throws IOException {</span> |
| <span class="source-line-no">263</span><span id="line-263"> // Use this method from HRS to create the CellScanner</span> |
| <span class="source-line-no">264</span><span id="line-264"> // If compressed, decompress it first before passing it on else we will leak compression</span> |
| <span class="source-line-no">265</span><span id="line-265"> // resources if the stream is not closed properly after we let it out.</span> |
| <span class="source-line-no">266</span><span id="line-266"> if (compressor != null) {</span> |
| <span class="source-line-no">267</span><span id="line-267"> cellBlock = decompress(compressor, cellBlock);</span> |
| <span class="source-line-no">268</span><span id="line-268"> }</span> |
| <span class="source-line-no">269</span><span id="line-269"> return codec.getDecoder(cellBlock);</span> |
| <span class="source-line-no">270</span><span id="line-270"> }</span> |
| <span class="source-line-no">271</span><span id="line-271"></span> |
| <span class="source-line-no">272</span><span id="line-272"> private ByteBuffer decompress(CompressionCodec compressor, byte[] compressedCellBlock)</span> |
| <span class="source-line-no">273</span><span id="line-273"> throws IOException {</span> |
| <span class="source-line-no">274</span><span id="line-274"> ByteBuffer cellBlock = decompress(compressor, new ByteArrayInputStream(compressedCellBlock),</span> |
| <span class="source-line-no">275</span><span id="line-275"> compressedCellBlock.length * this.cellBlockDecompressionMultiplier);</span> |
| <span class="source-line-no">276</span><span id="line-276"> return cellBlock;</span> |
| <span class="source-line-no">277</span><span id="line-277"> }</span> |
| <span class="source-line-no">278</span><span id="line-278"></span> |
| <span class="source-line-no">279</span><span id="line-279"> private ByteBuff decompress(CompressionCodec compressor, ByteBuff compressedCellBlock)</span> |
| <span class="source-line-no">280</span><span id="line-280"> throws IOException {</span> |
| <span class="source-line-no">281</span><span id="line-281"> ByteBuffer cellBlock = decompress(compressor, new ByteBuffInputStream(compressedCellBlock),</span> |
| <span class="source-line-no">282</span><span id="line-282"> compressedCellBlock.remaining() * this.cellBlockDecompressionMultiplier);</span> |
| <span class="source-line-no">283</span><span id="line-283"> return new SingleByteBuff(cellBlock);</span> |
| <span class="source-line-no">284</span><span id="line-284"> }</span> |
| <span class="source-line-no">285</span><span id="line-285"></span> |
| <span class="source-line-no">286</span><span id="line-286"> private ByteBuffer decompress(CompressionCodec compressor, InputStream cellBlockStream,</span> |
| <span class="source-line-no">287</span><span id="line-287"> int osInitialSize) throws IOException {</span> |
| <span class="source-line-no">288</span><span id="line-288"> // GZIPCodec fails w/ NPE if no configuration.</span> |
| <span class="source-line-no">289</span><span id="line-289"> if (compressor instanceof Configurable) {</span> |
| <span class="source-line-no">290</span><span id="line-290"> ((Configurable) compressor).setConf(this.conf);</span> |
| <span class="source-line-no">291</span><span id="line-291"> }</span> |
| <span class="source-line-no">292</span><span id="line-292"> Decompressor poolDecompressor = CodecPool.getDecompressor(compressor);</span> |
| <span class="source-line-no">293</span><span id="line-293"> CompressionInputStream cis = compressor.createInputStream(cellBlockStream, poolDecompressor);</span> |
| <span class="source-line-no">294</span><span id="line-294"> ByteBufferOutputStream bbos;</span> |
| <span class="source-line-no">295</span><span id="line-295"> try {</span> |
| <span class="source-line-no">296</span><span id="line-296"> // TODO: This is ugly. The buffer will be resized on us if we guess wrong.</span> |
| <span class="source-line-no">297</span><span id="line-297"> // TODO: Reuse buffers.</span> |
| <span class="source-line-no">298</span><span id="line-298"> bbos = new ByteBufferOutputStream(osInitialSize);</span> |
| <span class="source-line-no">299</span><span id="line-299"> IOUtils.copy(cis, bbos);</span> |
| <span class="source-line-no">300</span><span id="line-300"> bbos.close();</span> |
| <span class="source-line-no">301</span><span id="line-301"> return bbos.getByteBuffer();</span> |
| <span class="source-line-no">302</span><span id="line-302"> } finally {</span> |
| <span class="source-line-no">303</span><span id="line-303"> CodecPool.returnDecompressor(poolDecompressor);</span> |
| <span class="source-line-no">304</span><span id="line-304"> }</span> |
| <span class="source-line-no">305</span><span id="line-305"> }</span> |
| <span class="source-line-no">306</span><span id="line-306">}</span> |
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| </pre> |
| </div> |
| </main> |
| </body> |
| </html> |
