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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.io.encoding;</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.ByteArrayOutputStream;</span> |
| <span class="source-line-no">022</span><span id="line-22">import java.io.DataInputStream;</span> |
| <span class="source-line-no">023</span><span id="line-23">import java.io.DataOutputStream;</span> |
| <span class="source-line-no">024</span><span id="line-24">import java.io.IOException;</span> |
| <span class="source-line-no">025</span><span id="line-25">import java.io.OutputStream;</span> |
| <span class="source-line-no">026</span><span id="line-26">import java.nio.ByteBuffer;</span> |
| <span class="source-line-no">027</span><span id="line-27">import java.util.ArrayList;</span> |
| <span class="source-line-no">028</span><span id="line-28">import java.util.Iterator;</span> |
| <span class="source-line-no">029</span><span id="line-29">import java.util.List;</span> |
| <span class="source-line-no">030</span><span id="line-30">import org.apache.commons.lang3.NotImplementedException;</span> |
| <span class="source-line-no">031</span><span id="line-31">import org.apache.hadoop.conf.Configuration;</span> |
| <span class="source-line-no">032</span><span id="line-32">import org.apache.hadoop.hbase.ExtendedCell;</span> |
| <span class="source-line-no">033</span><span id="line-33">import org.apache.hadoop.hbase.HConstants;</span> |
| <span class="source-line-no">034</span><span id="line-34">import org.apache.hadoop.hbase.KeyValue;</span> |
| <span class="source-line-no">035</span><span id="line-35">import org.apache.hadoop.hbase.io.compress.Compression.Algorithm;</span> |
| <span class="source-line-no">036</span><span id="line-36">import org.apache.hadoop.hbase.io.hfile.HFileContext;</span> |
| <span class="source-line-no">037</span><span id="line-37">import org.apache.hadoop.hbase.util.ByteBufferUtils;</span> |
| <span class="source-line-no">038</span><span id="line-38">import org.apache.hadoop.hbase.util.Bytes;</span> |
| <span class="source-line-no">039</span><span id="line-39">import org.apache.hadoop.io.IOUtils;</span> |
| <span class="source-line-no">040</span><span id="line-40">import org.apache.hadoop.io.compress.Compressor;</span> |
| <span class="source-line-no">041</span><span id="line-41">import org.apache.yetus.audience.InterfaceAudience;</span> |
| <span class="source-line-no">042</span><span id="line-42"></span> |
| <span class="source-line-no">043</span><span id="line-43">import org.apache.hbase.thirdparty.com.google.common.base.Preconditions;</span> |
| <span class="source-line-no">044</span><span id="line-44"></span> |
| <span class="source-line-no">045</span><span id="line-45">/**</span> |
| <span class="source-line-no">046</span><span id="line-46"> * Encapsulates a data block compressed using a particular encoding algorithm. Useful for testing</span> |
| <span class="source-line-no">047</span><span id="line-47"> * and benchmarking. This is used only in testing.</span> |
| <span class="source-line-no">048</span><span id="line-48"> */</span> |
| <span class="source-line-no">049</span><span id="line-49">@InterfaceAudience.Private</span> |
| <span class="source-line-no">050</span><span id="line-50">public class EncodedDataBlock {</span> |
| <span class="source-line-no">051</span><span id="line-51"> private byte[] rawKVs;</span> |
| <span class="source-line-no">052</span><span id="line-52"> private ByteBuffer rawBuffer;</span> |
| <span class="source-line-no">053</span><span id="line-53"> private DataBlockEncoder dataBlockEncoder;</span> |
| <span class="source-line-no">054</span><span id="line-54"></span> |
| <span class="source-line-no">055</span><span id="line-55"> private byte[] cachedEncodedData;</span> |
| <span class="source-line-no">056</span><span id="line-56"></span> |
| <span class="source-line-no">057</span><span id="line-57"> private final HFileBlockEncodingContext encodingCtx;</span> |
| <span class="source-line-no">058</span><span id="line-58"> private HFileContext meta;</span> |
| <span class="source-line-no">059</span><span id="line-59"></span> |
| <span class="source-line-no">060</span><span id="line-60"> private final DataBlockEncoding encoding;</span> |
| <span class="source-line-no">061</span><span id="line-61"> private final Configuration conf;</span> |
| <span class="source-line-no">062</span><span id="line-62"></span> |
| <span class="source-line-no">063</span><span id="line-63"> // The is for one situation that there are some cells includes tags and others are not.</span> |
| <span class="source-line-no">064</span><span id="line-64"> // isTagsLenZero stores if cell tags length is zero before doing encoding since we need</span> |
| <span class="source-line-no">065</span><span id="line-65"> // to check cell tags length is zero or not after decoding.</span> |
| <span class="source-line-no">066</span><span id="line-66"> // Encoders ROW_INDEX_V1 would abandon tags segment if tags is 0 after decode cells to</span> |
| <span class="source-line-no">067</span><span id="line-67"> // byte array, other encoders won't do that. So we have to find a way to add tagsLen zero</span> |
| <span class="source-line-no">068</span><span id="line-68"> // in the decoded byte array.</span> |
| <span class="source-line-no">069</span><span id="line-69"> private List<Boolean> isTagsLenZero = new ArrayList<>();</span> |
| <span class="source-line-no">070</span><span id="line-70"></span> |
| <span class="source-line-no">071</span><span id="line-71"> /**</span> |
| <span class="source-line-no">072</span><span id="line-72"> * Create a buffer which will be encoded using dataBlockEncoder.</span> |
| <span class="source-line-no">073</span><span id="line-73"> * @param conf store configuration</span> |
| <span class="source-line-no">074</span><span id="line-74"> * @param dataBlockEncoder Algorithm used for compression.</span> |
| <span class="source-line-no">075</span><span id="line-75"> * @param encoding encoding type used</span> |
| <span class="source-line-no">076</span><span id="line-76"> * @param rawKVs raw KVs</span> |
| <span class="source-line-no">077</span><span id="line-77"> * @param meta hfile context</span> |
| <span class="source-line-no">078</span><span id="line-78"> */</span> |
| <span class="source-line-no">079</span><span id="line-79"> public EncodedDataBlock(Configuration conf, DataBlockEncoder dataBlockEncoder,</span> |
| <span class="source-line-no">080</span><span id="line-80"> DataBlockEncoding encoding, byte[] rawKVs, HFileContext meta) {</span> |
| <span class="source-line-no">081</span><span id="line-81"> Preconditions.checkNotNull(encoding, "Cannot create encoded data block with null encoder");</span> |
| <span class="source-line-no">082</span><span id="line-82"> this.dataBlockEncoder = dataBlockEncoder;</span> |
| <span class="source-line-no">083</span><span id="line-83"> this.encoding = encoding;</span> |
| <span class="source-line-no">084</span><span id="line-84"> encodingCtx = dataBlockEncoder.newDataBlockEncodingContext(conf, encoding,</span> |
| <span class="source-line-no">085</span><span id="line-85"> HConstants.HFILEBLOCK_DUMMY_HEADER, meta);</span> |
| <span class="source-line-no">086</span><span id="line-86"> this.rawKVs = rawKVs;</span> |
| <span class="source-line-no">087</span><span id="line-87"> this.meta = meta;</span> |
| <span class="source-line-no">088</span><span id="line-88"> this.conf = conf;</span> |
| <span class="source-line-no">089</span><span id="line-89"> }</span> |
| <span class="source-line-no">090</span><span id="line-90"></span> |
| <span class="source-line-no">091</span><span id="line-91"> /**</span> |
| <span class="source-line-no">092</span><span id="line-92"> * Provides access to compressed value.</span> |
| <span class="source-line-no">093</span><span id="line-93"> * @param headerSize header size of the block.</span> |
| <span class="source-line-no">094</span><span id="line-94"> * @return Forwards sequential iterator.</span> |
| <span class="source-line-no">095</span><span id="line-95"> */</span> |
| <span class="source-line-no">096</span><span id="line-96"> public Iterator<ExtendedCell> getIterator(int headerSize) {</span> |
| <span class="source-line-no">097</span><span id="line-97"> final int rawSize = rawKVs.length;</span> |
| <span class="source-line-no">098</span><span id="line-98"> byte[] encodedDataWithHeader = getEncodedData();</span> |
| <span class="source-line-no">099</span><span id="line-99"> int bytesToSkip = headerSize + Bytes.SIZEOF_SHORT;</span> |
| <span class="source-line-no">100</span><span id="line-100"> ByteArrayInputStream bais = new ByteArrayInputStream(encodedDataWithHeader, bytesToSkip,</span> |
| <span class="source-line-no">101</span><span id="line-101"> encodedDataWithHeader.length - bytesToSkip);</span> |
| <span class="source-line-no">102</span><span id="line-102"> final DataInputStream dis = new DataInputStream(bais);</span> |
| <span class="source-line-no">103</span><span id="line-103"></span> |
| <span class="source-line-no">104</span><span id="line-104"> return new Iterator<ExtendedCell>() {</span> |
| <span class="source-line-no">105</span><span id="line-105"> private ByteBuffer decompressedData = null;</span> |
| <span class="source-line-no">106</span><span id="line-106"> private Iterator<Boolean> it = isTagsLenZero.iterator();</span> |
| <span class="source-line-no">107</span><span id="line-107"></span> |
| <span class="source-line-no">108</span><span id="line-108"> @Override</span> |
| <span class="source-line-no">109</span><span id="line-109"> public boolean hasNext() {</span> |
| <span class="source-line-no">110</span><span id="line-110"> if (decompressedData == null) {</span> |
| <span class="source-line-no">111</span><span id="line-111"> return rawSize > 0;</span> |
| <span class="source-line-no">112</span><span id="line-112"> }</span> |
| <span class="source-line-no">113</span><span id="line-113"> return decompressedData.hasRemaining();</span> |
| <span class="source-line-no">114</span><span id="line-114"> }</span> |
| <span class="source-line-no">115</span><span id="line-115"></span> |
| <span class="source-line-no">116</span><span id="line-116"> @Override</span> |
| <span class="source-line-no">117</span><span id="line-117"> public ExtendedCell next() {</span> |
| <span class="source-line-no">118</span><span id="line-118"> if (decompressedData == null) {</span> |
| <span class="source-line-no">119</span><span id="line-119"> try {</span> |
| <span class="source-line-no">120</span><span id="line-120"> decompressedData = dataBlockEncoder.decodeKeyValues(dis,</span> |
| <span class="source-line-no">121</span><span id="line-121"> dataBlockEncoder.newDataBlockDecodingContext(conf, meta));</span> |
| <span class="source-line-no">122</span><span id="line-122"> } catch (IOException e) {</span> |
| <span class="source-line-no">123</span><span id="line-123"> throw new RuntimeException("Problem with data block encoder, "</span> |
| <span class="source-line-no">124</span><span id="line-124"> + "most likely it requested more bytes than are available.", e);</span> |
| <span class="source-line-no">125</span><span id="line-125"> }</span> |
| <span class="source-line-no">126</span><span id="line-126"> decompressedData.rewind();</span> |
| <span class="source-line-no">127</span><span id="line-127"> }</span> |
| <span class="source-line-no">128</span><span id="line-128"> int offset = decompressedData.position();</span> |
| <span class="source-line-no">129</span><span id="line-129"> int klen = decompressedData.getInt();</span> |
| <span class="source-line-no">130</span><span id="line-130"> int vlen = decompressedData.getInt();</span> |
| <span class="source-line-no">131</span><span id="line-131"> int tagsLen = 0;</span> |
| <span class="source-line-no">132</span><span id="line-132"> ByteBufferUtils.skip(decompressedData, klen + vlen);</span> |
| <span class="source-line-no">133</span><span id="line-133"> // Read the tag length in case when stream contain tags</span> |
| <span class="source-line-no">134</span><span id="line-134"> if (meta.isIncludesTags()) {</span> |
| <span class="source-line-no">135</span><span id="line-135"> boolean noTags = true;</span> |
| <span class="source-line-no">136</span><span id="line-136"> if (it.hasNext()) {</span> |
| <span class="source-line-no">137</span><span id="line-137"> noTags = it.next();</span> |
| <span class="source-line-no">138</span><span id="line-138"> }</span> |
| <span class="source-line-no">139</span><span id="line-139"> // ROW_INDEX_V1 will not put tagsLen back in cell if it is zero, there is no need</span> |
| <span class="source-line-no">140</span><span id="line-140"> // to read short here.</span> |
| <span class="source-line-no">141</span><span id="line-141"> if (!(encoding.equals(DataBlockEncoding.ROW_INDEX_V1) && noTags)) {</span> |
| <span class="source-line-no">142</span><span id="line-142"> tagsLen = ((decompressedData.get() & 0xff) << 8) ^ (decompressedData.get() & 0xff);</span> |
| <span class="source-line-no">143</span><span id="line-143"> ByteBufferUtils.skip(decompressedData, tagsLen);</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"> KeyValue kv =</span> |
| <span class="source-line-no">147</span><span id="line-147"> new KeyValue(decompressedData.array(), decompressedData.arrayOffset() + offset,</span> |
| <span class="source-line-no">148</span><span id="line-148"> (int) KeyValue.getKeyValueDataStructureSize(klen, vlen, tagsLen));</span> |
| <span class="source-line-no">149</span><span id="line-149"> if (meta.isIncludesMvcc()) {</span> |
| <span class="source-line-no">150</span><span id="line-150"> long mvccVersion = ByteBufferUtils.readVLong(decompressedData);</span> |
| <span class="source-line-no">151</span><span id="line-151"> kv.setSequenceId(mvccVersion);</span> |
| <span class="source-line-no">152</span><span id="line-152"> }</span> |
| <span class="source-line-no">153</span><span id="line-153"> return kv;</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"> @Override</span> |
| <span class="source-line-no">157</span><span id="line-157"> public void remove() {</span> |
| <span class="source-line-no">158</span><span id="line-158"> throw new NotImplementedException("remove() is not supported!");</span> |
| <span class="source-line-no">159</span><span id="line-159"> }</span> |
| <span class="source-line-no">160</span><span id="line-160"></span> |
| <span class="source-line-no">161</span><span id="line-161"> @Override</span> |
| <span class="source-line-no">162</span><span id="line-162"> public String toString() {</span> |
| <span class="source-line-no">163</span><span id="line-163"> return "Iterator of: " + dataBlockEncoder.getClass().getName();</span> |
| <span class="source-line-no">164</span><span id="line-164"> }</span> |
| <span class="source-line-no">165</span><span id="line-165"></span> |
| <span class="source-line-no">166</span><span id="line-166"> };</span> |
| <span class="source-line-no">167</span><span id="line-167"> }</span> |
| <span class="source-line-no">168</span><span id="line-168"></span> |
| <span class="source-line-no">169</span><span id="line-169"> /**</span> |
| <span class="source-line-no">170</span><span id="line-170"> * Find the size of minimal buffer that could store compressed data.</span> |
| <span class="source-line-no">171</span><span id="line-171"> * @return Size in bytes of compressed data.</span> |
| <span class="source-line-no">172</span><span id="line-172"> */</span> |
| <span class="source-line-no">173</span><span id="line-173"> public int getSize() {</span> |
| <span class="source-line-no">174</span><span id="line-174"> return getEncodedData().length;</span> |
| <span class="source-line-no">175</span><span id="line-175"> }</span> |
| <span class="source-line-no">176</span><span id="line-176"></span> |
| <span class="source-line-no">177</span><span id="line-177"> /**</span> |
| <span class="source-line-no">178</span><span id="line-178"> * Find the size of compressed data assuming that buffer will be compressed using given algorithm.</span> |
| <span class="source-line-no">179</span><span id="line-179"> * @param algo compression algorithm</span> |
| <span class="source-line-no">180</span><span id="line-180"> * @param compressor compressor already requested from codec</span> |
| <span class="source-line-no">181</span><span id="line-181"> * @param inputBuffer Array to be compressed.</span> |
| <span class="source-line-no">182</span><span id="line-182"> * @param offset Offset to beginning of the data.</span> |
| <span class="source-line-no">183</span><span id="line-183"> * @param length Length to be compressed.</span> |
| <span class="source-line-no">184</span><span id="line-184"> * @return Size of compressed data in bytes.</span> |
| <span class="source-line-no">185</span><span id="line-185"> */</span> |
| <span class="source-line-no">186</span><span id="line-186"> @edu.umd.cs.findbugs.annotations.SuppressWarnings(value = "NP_NULL_ON_SOME_PATH_EXCEPTION",</span> |
| <span class="source-line-no">187</span><span id="line-187"> justification = "No sure what findbugs wants but looks to me like no NPE")</span> |
| <span class="source-line-no">188</span><span id="line-188"> public static int getCompressedSize(Algorithm algo, Compressor compressor, byte[] inputBuffer,</span> |
| <span class="source-line-no">189</span><span id="line-189"> int offset, int length) throws IOException {</span> |
| <span class="source-line-no">190</span><span id="line-190"></span> |
| <span class="source-line-no">191</span><span id="line-191"> // Create streams</span> |
| <span class="source-line-no">192</span><span id="line-192"> // Storing them so we can close them</span> |
| <span class="source-line-no">193</span><span id="line-193"> final IOUtils.NullOutputStream nullOutputStream = new IOUtils.NullOutputStream();</span> |
| <span class="source-line-no">194</span><span id="line-194"> final DataOutputStream compressedStream = new DataOutputStream(nullOutputStream);</span> |
| <span class="source-line-no">195</span><span id="line-195"> OutputStream compressingStream = null;</span> |
| <span class="source-line-no">196</span><span id="line-196"></span> |
| <span class="source-line-no">197</span><span id="line-197"> try {</span> |
| <span class="source-line-no">198</span><span id="line-198"> if (compressor != null) {</span> |
| <span class="source-line-no">199</span><span id="line-199"> compressor.reset();</span> |
| <span class="source-line-no">200</span><span id="line-200"> }</span> |
| <span class="source-line-no">201</span><span id="line-201"></span> |
| <span class="source-line-no">202</span><span id="line-202"> compressingStream = algo.createCompressionStream(compressedStream, compressor, 0);</span> |
| <span class="source-line-no">203</span><span id="line-203"></span> |
| <span class="source-line-no">204</span><span id="line-204"> compressingStream.write(inputBuffer, offset, length);</span> |
| <span class="source-line-no">205</span><span id="line-205"> compressingStream.flush();</span> |
| <span class="source-line-no">206</span><span id="line-206"></span> |
| <span class="source-line-no">207</span><span id="line-207"> return compressedStream.size();</span> |
| <span class="source-line-no">208</span><span id="line-208"> } finally {</span> |
| <span class="source-line-no">209</span><span id="line-209"> nullOutputStream.close();</span> |
| <span class="source-line-no">210</span><span id="line-210"> compressedStream.close();</span> |
| <span class="source-line-no">211</span><span id="line-211"> if (compressingStream != null) {</span> |
| <span class="source-line-no">212</span><span id="line-212"> compressingStream.close();</span> |
| <span class="source-line-no">213</span><span id="line-213"> }</span> |
| <span class="source-line-no">214</span><span id="line-214"> }</span> |
| <span class="source-line-no">215</span><span id="line-215"> }</span> |
| <span class="source-line-no">216</span><span id="line-216"></span> |
| <span class="source-line-no">217</span><span id="line-217"> /**</span> |
| <span class="source-line-no">218</span><span id="line-218"> * Estimate size after second stage of compression (e.g. LZO).</span> |
| <span class="source-line-no">219</span><span id="line-219"> * @param comprAlgo compression algorithm to be used for compression</span> |
| <span class="source-line-no">220</span><span id="line-220"> * @param compressor compressor corresponding to the given compression algorithm</span> |
| <span class="source-line-no">221</span><span id="line-221"> * @return Size after second stage of compression.</span> |
| <span class="source-line-no">222</span><span id="line-222"> */</span> |
| <span class="source-line-no">223</span><span id="line-223"> public int getEncodedCompressedSize(Algorithm comprAlgo, Compressor compressor)</span> |
| <span class="source-line-no">224</span><span id="line-224"> throws IOException {</span> |
| <span class="source-line-no">225</span><span id="line-225"> byte[] compressedBytes = getEncodedData();</span> |
| <span class="source-line-no">226</span><span id="line-226"> return getCompressedSize(comprAlgo, compressor, compressedBytes, 0, compressedBytes.length);</span> |
| <span class="source-line-no">227</span><span id="line-227"> }</span> |
| <span class="source-line-no">228</span><span id="line-228"></span> |
| <span class="source-line-no">229</span><span id="line-229"> /** Returns encoded data with header */</span> |
| <span class="source-line-no">230</span><span id="line-230"> private byte[] getEncodedData() {</span> |
| <span class="source-line-no">231</span><span id="line-231"> if (cachedEncodedData != null) {</span> |
| <span class="source-line-no">232</span><span id="line-232"> return cachedEncodedData;</span> |
| <span class="source-line-no">233</span><span id="line-233"> }</span> |
| <span class="source-line-no">234</span><span id="line-234"> cachedEncodedData = encodeData();</span> |
| <span class="source-line-no">235</span><span id="line-235"> return cachedEncodedData;</span> |
| <span class="source-line-no">236</span><span id="line-236"> }</span> |
| <span class="source-line-no">237</span><span id="line-237"></span> |
| <span class="source-line-no">238</span><span id="line-238"> private ByteBuffer getUncompressedBuffer() {</span> |
| <span class="source-line-no">239</span><span id="line-239"> if (rawBuffer == null || rawBuffer.limit() < rawKVs.length) {</span> |
| <span class="source-line-no">240</span><span id="line-240"> rawBuffer = ByteBuffer.wrap(rawKVs);</span> |
| <span class="source-line-no">241</span><span id="line-241"> }</span> |
| <span class="source-line-no">242</span><span id="line-242"> return rawBuffer;</span> |
| <span class="source-line-no">243</span><span id="line-243"> }</span> |
| <span class="source-line-no">244</span><span id="line-244"></span> |
| <span class="source-line-no">245</span><span id="line-245"> /**</span> |
| <span class="source-line-no">246</span><span id="line-246"> * Do the encoding, but do not cache the encoded data.</span> |
| <span class="source-line-no">247</span><span id="line-247"> * @return encoded data block with header and checksum</span> |
| <span class="source-line-no">248</span><span id="line-248"> */</span> |
| <span class="source-line-no">249</span><span id="line-249"> public byte[] encodeData() {</span> |
| <span class="source-line-no">250</span><span id="line-250"> ByteArrayOutputStream baos = new ByteArrayOutputStream();</span> |
| <span class="source-line-no">251</span><span id="line-251"> byte[] baosBytes = null;</span> |
| <span class="source-line-no">252</span><span id="line-252"> try {</span> |
| <span class="source-line-no">253</span><span id="line-253"> baos.write(HConstants.HFILEBLOCK_DUMMY_HEADER);</span> |
| <span class="source-line-no">254</span><span id="line-254"> DataOutputStream out = new DataOutputStream(baos);</span> |
| <span class="source-line-no">255</span><span id="line-255"> this.dataBlockEncoder.startBlockEncoding(encodingCtx, out);</span> |
| <span class="source-line-no">256</span><span id="line-256"> ByteBuffer in = getUncompressedBuffer();</span> |
| <span class="source-line-no">257</span><span id="line-257"> in.rewind();</span> |
| <span class="source-line-no">258</span><span id="line-258"> int klength, vlength;</span> |
| <span class="source-line-no">259</span><span id="line-259"> int tagsLength = 0;</span> |
| <span class="source-line-no">260</span><span id="line-260"> long memstoreTS = 0L;</span> |
| <span class="source-line-no">261</span><span id="line-261"> KeyValue kv = null;</span> |
| <span class="source-line-no">262</span><span id="line-262"> while (in.hasRemaining()) {</span> |
| <span class="source-line-no">263</span><span id="line-263"> int kvOffset = in.position();</span> |
| <span class="source-line-no">264</span><span id="line-264"> klength = in.getInt();</span> |
| <span class="source-line-no">265</span><span id="line-265"> vlength = in.getInt();</span> |
| <span class="source-line-no">266</span><span id="line-266"> ByteBufferUtils.skip(in, klength + vlength);</span> |
| <span class="source-line-no">267</span><span id="line-267"> if (this.meta.isIncludesTags()) {</span> |
| <span class="source-line-no">268</span><span id="line-268"> tagsLength = ((in.get() & 0xff) << 8) ^ (in.get() & 0xff);</span> |
| <span class="source-line-no">269</span><span id="line-269"> ByteBufferUtils.skip(in, tagsLength);</span> |
| <span class="source-line-no">270</span><span id="line-270"> this.isTagsLenZero.add(tagsLength == 0);</span> |
| <span class="source-line-no">271</span><span id="line-271"> }</span> |
| <span class="source-line-no">272</span><span id="line-272"> if (this.meta.isIncludesMvcc()) {</span> |
| <span class="source-line-no">273</span><span id="line-273"> memstoreTS = ByteBufferUtils.readVLong(in);</span> |
| <span class="source-line-no">274</span><span id="line-274"> }</span> |
| <span class="source-line-no">275</span><span id="line-275"> kv = new KeyValue(in.array(), in.arrayOffset() + kvOffset,</span> |
| <span class="source-line-no">276</span><span id="line-276"> (int) KeyValue.getKeyValueDataStructureSize(klength, vlength, tagsLength));</span> |
| <span class="source-line-no">277</span><span id="line-277"> kv.setSequenceId(memstoreTS);</span> |
| <span class="source-line-no">278</span><span id="line-278"> this.dataBlockEncoder.encode(kv, encodingCtx, out);</span> |
| <span class="source-line-no">279</span><span id="line-279"> }</span> |
| <span class="source-line-no">280</span><span id="line-280"> // Below depends on BAOS internal behavior. toByteArray makes a copy of bytes so far.</span> |
| <span class="source-line-no">281</span><span id="line-281"> baos.flush();</span> |
| <span class="source-line-no">282</span><span id="line-282"> baosBytes = baos.toByteArray();</span> |
| <span class="source-line-no">283</span><span id="line-283"> this.dataBlockEncoder.endBlockEncoding(encodingCtx, out, baosBytes);</span> |
| <span class="source-line-no">284</span><span id="line-284"> // In endBlockEncoding(encodingCtx, out, baosBytes), Encoder ROW_INDEX_V1 write integer in</span> |
| <span class="source-line-no">285</span><span id="line-285"> // out while the others write integer in baosBytes(byte array). We need to add</span> |
| <span class="source-line-no">286</span><span id="line-286"> // baos.toByteArray() after endBlockEncoding again to make sure the integer writes in</span> |
| <span class="source-line-no">287</span><span id="line-287"> // outputstream with Encoder ROW_INDEX_V1 dump to byte array (baosBytes).</span> |
| <span class="source-line-no">288</span><span id="line-288"> // The if branch is necessary because Encoders excepts ROW_INDEX_V1 write integer in</span> |
| <span class="source-line-no">289</span><span id="line-289"> // baosBytes directly, without if branch and do toByteArray() again, baosBytes won't</span> |
| <span class="source-line-no">290</span><span id="line-290"> // contains the integer wrotten in endBlockEncoding.</span> |
| <span class="source-line-no">291</span><span id="line-291"> if (this.encoding.equals(DataBlockEncoding.ROW_INDEX_V1)) {</span> |
| <span class="source-line-no">292</span><span id="line-292"> baosBytes = baos.toByteArray();</span> |
| <span class="source-line-no">293</span><span id="line-293"> }</span> |
| <span class="source-line-no">294</span><span id="line-294"> } catch (IOException e) {</span> |
| <span class="source-line-no">295</span><span id="line-295"> throw new RuntimeException(String.format("Bug in encoding part of algorithm %s. "</span> |
| <span class="source-line-no">296</span><span id="line-296"> + "Probably it requested more bytes than are available.", toString()), e);</span> |
| <span class="source-line-no">297</span><span id="line-297"> }</span> |
| <span class="source-line-no">298</span><span id="line-298"> return baosBytes;</span> |
| <span class="source-line-no">299</span><span id="line-299"> }</span> |
| <span class="source-line-no">300</span><span id="line-300"></span> |
| <span class="source-line-no">301</span><span id="line-301"> @Override</span> |
| <span class="source-line-no">302</span><span id="line-302"> public String toString() {</span> |
| <span class="source-line-no">303</span><span id="line-303"> return encoding.name();</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> |
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| </pre> |
| </div> |
| </main> |
| </body> |
| </html> |
