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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.io.encoding;<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.ByteArrayOutputStream;<a name="line.21"></a> |
| <span class="sourceLineNo">022</span>import java.io.DataInputStream;<a name="line.22"></a> |
| <span class="sourceLineNo">023</span>import java.io.DataOutputStream;<a name="line.23"></a> |
| <span class="sourceLineNo">024</span>import java.io.IOException;<a name="line.24"></a> |
| <span class="sourceLineNo">025</span>import java.io.OutputStream;<a name="line.25"></a> |
| <span class="sourceLineNo">026</span>import java.nio.ByteBuffer;<a name="line.26"></a> |
| <span class="sourceLineNo">027</span>import java.util.ArrayList;<a name="line.27"></a> |
| <span class="sourceLineNo">028</span>import java.util.Iterator;<a name="line.28"></a> |
| <span class="sourceLineNo">029</span>import java.util.List;<a name="line.29"></a> |
| <span class="sourceLineNo">030</span>import org.apache.commons.lang3.NotImplementedException;<a name="line.30"></a> |
| <span class="sourceLineNo">031</span>import org.apache.hadoop.conf.Configuration;<a name="line.31"></a> |
| <span class="sourceLineNo">032</span>import org.apache.hadoop.hbase.Cell;<a name="line.32"></a> |
| <span class="sourceLineNo">033</span>import org.apache.hadoop.hbase.HConstants;<a name="line.33"></a> |
| <span class="sourceLineNo">034</span>import org.apache.hadoop.hbase.KeyValue;<a name="line.34"></a> |
| <span class="sourceLineNo">035</span>import org.apache.hadoop.hbase.io.compress.Compression.Algorithm;<a name="line.35"></a> |
| <span class="sourceLineNo">036</span>import org.apache.hadoop.hbase.io.hfile.HFileContext;<a name="line.36"></a> |
| <span class="sourceLineNo">037</span>import org.apache.hadoop.hbase.util.ByteBufferUtils;<a name="line.37"></a> |
| <span class="sourceLineNo">038</span>import org.apache.hadoop.hbase.util.Bytes;<a name="line.38"></a> |
| <span class="sourceLineNo">039</span>import org.apache.hadoop.io.IOUtils;<a name="line.39"></a> |
| <span class="sourceLineNo">040</span>import org.apache.hadoop.io.compress.Compressor;<a name="line.40"></a> |
| <span class="sourceLineNo">041</span>import org.apache.yetus.audience.InterfaceAudience;<a name="line.41"></a> |
| <span class="sourceLineNo">042</span><a name="line.42"></a> |
| <span class="sourceLineNo">043</span>import org.apache.hbase.thirdparty.com.google.common.base.Preconditions;<a name="line.43"></a> |
| <span class="sourceLineNo">044</span><a name="line.44"></a> |
| <span class="sourceLineNo">045</span>/**<a name="line.45"></a> |
| <span class="sourceLineNo">046</span> * Encapsulates a data block compressed using a particular encoding algorithm. Useful for testing<a name="line.46"></a> |
| <span class="sourceLineNo">047</span> * and benchmarking. This is used only in testing.<a name="line.47"></a> |
| <span class="sourceLineNo">048</span> */<a name="line.48"></a> |
| <span class="sourceLineNo">049</span>@InterfaceAudience.Private<a name="line.49"></a> |
| <span class="sourceLineNo">050</span>public class EncodedDataBlock {<a name="line.50"></a> |
| <span class="sourceLineNo">051</span> private byte[] rawKVs;<a name="line.51"></a> |
| <span class="sourceLineNo">052</span> private ByteBuffer rawBuffer;<a name="line.52"></a> |
| <span class="sourceLineNo">053</span> private DataBlockEncoder dataBlockEncoder;<a name="line.53"></a> |
| <span class="sourceLineNo">054</span><a name="line.54"></a> |
| <span class="sourceLineNo">055</span> private byte[] cachedEncodedData;<a name="line.55"></a> |
| <span class="sourceLineNo">056</span><a name="line.56"></a> |
| <span class="sourceLineNo">057</span> private final HFileBlockEncodingContext encodingCtx;<a name="line.57"></a> |
| <span class="sourceLineNo">058</span> private HFileContext meta;<a name="line.58"></a> |
| <span class="sourceLineNo">059</span><a name="line.59"></a> |
| <span class="sourceLineNo">060</span> private final DataBlockEncoding encoding;<a name="line.60"></a> |
| <span class="sourceLineNo">061</span> private final Configuration conf;<a name="line.61"></a> |
| <span class="sourceLineNo">062</span><a name="line.62"></a> |
| <span class="sourceLineNo">063</span> // The is for one situation that there are some cells includes tags and others are not.<a name="line.63"></a> |
| <span class="sourceLineNo">064</span> // isTagsLenZero stores if cell tags length is zero before doing encoding since we need<a name="line.64"></a> |
| <span class="sourceLineNo">065</span> // to check cell tags length is zero or not after decoding.<a name="line.65"></a> |
| <span class="sourceLineNo">066</span> // Encoders ROW_INDEX_V1 would abandon tags segment if tags is 0 after decode cells to<a name="line.66"></a> |
| <span class="sourceLineNo">067</span> // byte array, other encoders won't do that. So we have to find a way to add tagsLen zero<a name="line.67"></a> |
| <span class="sourceLineNo">068</span> // in the decoded byte array.<a name="line.68"></a> |
| <span class="sourceLineNo">069</span> private List<Boolean> isTagsLenZero = new ArrayList<>();<a name="line.69"></a> |
| <span class="sourceLineNo">070</span><a name="line.70"></a> |
| <span class="sourceLineNo">071</span> /**<a name="line.71"></a> |
| <span class="sourceLineNo">072</span> * Create a buffer which will be encoded using dataBlockEncoder.<a name="line.72"></a> |
| <span class="sourceLineNo">073</span> * @param conf store configuration<a name="line.73"></a> |
| <span class="sourceLineNo">074</span> * @param dataBlockEncoder Algorithm used for compression.<a name="line.74"></a> |
| <span class="sourceLineNo">075</span> * @param encoding encoding type used<a name="line.75"></a> |
| <span class="sourceLineNo">076</span> * @param rawKVs raw KVs<a name="line.76"></a> |
| <span class="sourceLineNo">077</span> * @param meta hfile context<a name="line.77"></a> |
| <span class="sourceLineNo">078</span> */<a name="line.78"></a> |
| <span class="sourceLineNo">079</span> public EncodedDataBlock(Configuration conf, DataBlockEncoder dataBlockEncoder,<a name="line.79"></a> |
| <span class="sourceLineNo">080</span> DataBlockEncoding encoding, byte[] rawKVs, HFileContext meta) {<a name="line.80"></a> |
| <span class="sourceLineNo">081</span> Preconditions.checkNotNull(encoding, "Cannot create encoded data block with null encoder");<a name="line.81"></a> |
| <span class="sourceLineNo">082</span> this.dataBlockEncoder = dataBlockEncoder;<a name="line.82"></a> |
| <span class="sourceLineNo">083</span> this.encoding = encoding;<a name="line.83"></a> |
| <span class="sourceLineNo">084</span> encodingCtx = dataBlockEncoder.newDataBlockEncodingContext(conf, encoding,<a name="line.84"></a> |
| <span class="sourceLineNo">085</span> HConstants.HFILEBLOCK_DUMMY_HEADER, meta);<a name="line.85"></a> |
| <span class="sourceLineNo">086</span> this.rawKVs = rawKVs;<a name="line.86"></a> |
| <span class="sourceLineNo">087</span> this.meta = meta;<a name="line.87"></a> |
| <span class="sourceLineNo">088</span> this.conf = conf;<a name="line.88"></a> |
| <span class="sourceLineNo">089</span> }<a name="line.89"></a> |
| <span class="sourceLineNo">090</span><a name="line.90"></a> |
| <span class="sourceLineNo">091</span> /**<a name="line.91"></a> |
| <span class="sourceLineNo">092</span> * Provides access to compressed value.<a name="line.92"></a> |
| <span class="sourceLineNo">093</span> * @param headerSize header size of the block.<a name="line.93"></a> |
| <span class="sourceLineNo">094</span> * @return Forwards sequential iterator.<a name="line.94"></a> |
| <span class="sourceLineNo">095</span> */<a name="line.95"></a> |
| <span class="sourceLineNo">096</span> public Iterator<Cell> getIterator(int headerSize) {<a name="line.96"></a> |
| <span class="sourceLineNo">097</span> final int rawSize = rawKVs.length;<a name="line.97"></a> |
| <span class="sourceLineNo">098</span> byte[] encodedDataWithHeader = getEncodedData();<a name="line.98"></a> |
| <span class="sourceLineNo">099</span> int bytesToSkip = headerSize + Bytes.SIZEOF_SHORT;<a name="line.99"></a> |
| <span class="sourceLineNo">100</span> ByteArrayInputStream bais = new ByteArrayInputStream(encodedDataWithHeader, bytesToSkip,<a name="line.100"></a> |
| <span class="sourceLineNo">101</span> encodedDataWithHeader.length - bytesToSkip);<a name="line.101"></a> |
| <span class="sourceLineNo">102</span> final DataInputStream dis = new DataInputStream(bais);<a name="line.102"></a> |
| <span class="sourceLineNo">103</span><a name="line.103"></a> |
| <span class="sourceLineNo">104</span> return new Iterator<Cell>() {<a name="line.104"></a> |
| <span class="sourceLineNo">105</span> private ByteBuffer decompressedData = null;<a name="line.105"></a> |
| <span class="sourceLineNo">106</span> private Iterator<Boolean> it = isTagsLenZero.iterator();<a name="line.106"></a> |
| <span class="sourceLineNo">107</span><a name="line.107"></a> |
| <span class="sourceLineNo">108</span> @Override<a name="line.108"></a> |
| <span class="sourceLineNo">109</span> public boolean hasNext() {<a name="line.109"></a> |
| <span class="sourceLineNo">110</span> if (decompressedData == null) {<a name="line.110"></a> |
| <span class="sourceLineNo">111</span> return rawSize > 0;<a name="line.111"></a> |
| <span class="sourceLineNo">112</span> }<a name="line.112"></a> |
| <span class="sourceLineNo">113</span> return decompressedData.hasRemaining();<a name="line.113"></a> |
| <span class="sourceLineNo">114</span> }<a name="line.114"></a> |
| <span class="sourceLineNo">115</span><a name="line.115"></a> |
| <span class="sourceLineNo">116</span> @Override<a name="line.116"></a> |
| <span class="sourceLineNo">117</span> public Cell next() {<a name="line.117"></a> |
| <span class="sourceLineNo">118</span> if (decompressedData == null) {<a name="line.118"></a> |
| <span class="sourceLineNo">119</span> try {<a name="line.119"></a> |
| <span class="sourceLineNo">120</span> decompressedData = dataBlockEncoder.decodeKeyValues(dis,<a name="line.120"></a> |
| <span class="sourceLineNo">121</span> dataBlockEncoder.newDataBlockDecodingContext(conf, meta));<a name="line.121"></a> |
| <span class="sourceLineNo">122</span> } catch (IOException e) {<a name="line.122"></a> |
| <span class="sourceLineNo">123</span> throw new RuntimeException("Problem with data block encoder, "<a name="line.123"></a> |
| <span class="sourceLineNo">124</span> + "most likely it requested more bytes than are available.", e);<a name="line.124"></a> |
| <span class="sourceLineNo">125</span> }<a name="line.125"></a> |
| <span class="sourceLineNo">126</span> decompressedData.rewind();<a name="line.126"></a> |
| <span class="sourceLineNo">127</span> }<a name="line.127"></a> |
| <span class="sourceLineNo">128</span> int offset = decompressedData.position();<a name="line.128"></a> |
| <span class="sourceLineNo">129</span> int klen = decompressedData.getInt();<a name="line.129"></a> |
| <span class="sourceLineNo">130</span> int vlen = decompressedData.getInt();<a name="line.130"></a> |
| <span class="sourceLineNo">131</span> int tagsLen = 0;<a name="line.131"></a> |
| <span class="sourceLineNo">132</span> ByteBufferUtils.skip(decompressedData, klen + vlen);<a name="line.132"></a> |
| <span class="sourceLineNo">133</span> // Read the tag length in case when stream contain tags<a name="line.133"></a> |
| <span class="sourceLineNo">134</span> if (meta.isIncludesTags()) {<a name="line.134"></a> |
| <span class="sourceLineNo">135</span> boolean noTags = true;<a name="line.135"></a> |
| <span class="sourceLineNo">136</span> if (it.hasNext()) {<a name="line.136"></a> |
| <span class="sourceLineNo">137</span> noTags = it.next();<a name="line.137"></a> |
| <span class="sourceLineNo">138</span> }<a name="line.138"></a> |
| <span class="sourceLineNo">139</span> // ROW_INDEX_V1 will not put tagsLen back in cell if it is zero, there is no need<a name="line.139"></a> |
| <span class="sourceLineNo">140</span> // to read short here.<a name="line.140"></a> |
| <span class="sourceLineNo">141</span> if (!(encoding.equals(DataBlockEncoding.ROW_INDEX_V1) && noTags)) {<a name="line.141"></a> |
| <span class="sourceLineNo">142</span> tagsLen = ((decompressedData.get() & 0xff) << 8) ^ (decompressedData.get() & 0xff);<a name="line.142"></a> |
| <span class="sourceLineNo">143</span> ByteBufferUtils.skip(decompressedData, tagsLen);<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> KeyValue kv =<a name="line.146"></a> |
| <span class="sourceLineNo">147</span> new KeyValue(decompressedData.array(), decompressedData.arrayOffset() + offset,<a name="line.147"></a> |
| <span class="sourceLineNo">148</span> (int) KeyValue.getKeyValueDataStructureSize(klen, vlen, tagsLen));<a name="line.148"></a> |
| <span class="sourceLineNo">149</span> if (meta.isIncludesMvcc()) {<a name="line.149"></a> |
| <span class="sourceLineNo">150</span> long mvccVersion = ByteBufferUtils.readVLong(decompressedData);<a name="line.150"></a> |
| <span class="sourceLineNo">151</span> kv.setSequenceId(mvccVersion);<a name="line.151"></a> |
| <span class="sourceLineNo">152</span> }<a name="line.152"></a> |
| <span class="sourceLineNo">153</span> return kv;<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> @Override<a name="line.156"></a> |
| <span class="sourceLineNo">157</span> public void remove() {<a name="line.157"></a> |
| <span class="sourceLineNo">158</span> throw new NotImplementedException("remove() is not supported!");<a name="line.158"></a> |
| <span class="sourceLineNo">159</span> }<a name="line.159"></a> |
| <span class="sourceLineNo">160</span><a name="line.160"></a> |
| <span class="sourceLineNo">161</span> @Override<a name="line.161"></a> |
| <span class="sourceLineNo">162</span> public String toString() {<a name="line.162"></a> |
| <span class="sourceLineNo">163</span> return "Iterator of: " + dataBlockEncoder.getClass().getName();<a name="line.163"></a> |
| <span class="sourceLineNo">164</span> }<a name="line.164"></a> |
| <span class="sourceLineNo">165</span><a name="line.165"></a> |
| <span class="sourceLineNo">166</span> };<a name="line.166"></a> |
| <span class="sourceLineNo">167</span> }<a name="line.167"></a> |
| <span class="sourceLineNo">168</span><a name="line.168"></a> |
| <span class="sourceLineNo">169</span> /**<a name="line.169"></a> |
| <span class="sourceLineNo">170</span> * Find the size of minimal buffer that could store compressed data.<a name="line.170"></a> |
| <span class="sourceLineNo">171</span> * @return Size in bytes of compressed data.<a name="line.171"></a> |
| <span class="sourceLineNo">172</span> */<a name="line.172"></a> |
| <span class="sourceLineNo">173</span> public int getSize() {<a name="line.173"></a> |
| <span class="sourceLineNo">174</span> return getEncodedData().length;<a name="line.174"></a> |
| <span class="sourceLineNo">175</span> }<a name="line.175"></a> |
| <span class="sourceLineNo">176</span><a name="line.176"></a> |
| <span class="sourceLineNo">177</span> /**<a name="line.177"></a> |
| <span class="sourceLineNo">178</span> * Find the size of compressed data assuming that buffer will be compressed using given algorithm.<a name="line.178"></a> |
| <span class="sourceLineNo">179</span> * @param algo compression algorithm<a name="line.179"></a> |
| <span class="sourceLineNo">180</span> * @param compressor compressor already requested from codec<a name="line.180"></a> |
| <span class="sourceLineNo">181</span> * @param inputBuffer Array to be compressed.<a name="line.181"></a> |
| <span class="sourceLineNo">182</span> * @param offset Offset to beginning of the data.<a name="line.182"></a> |
| <span class="sourceLineNo">183</span> * @param length Length to be compressed.<a name="line.183"></a> |
| <span class="sourceLineNo">184</span> * @return Size of compressed data in bytes.<a name="line.184"></a> |
| <span class="sourceLineNo">185</span> */<a name="line.185"></a> |
| <span class="sourceLineNo">186</span> @edu.umd.cs.findbugs.annotations.SuppressWarnings(value = "NP_NULL_ON_SOME_PATH_EXCEPTION",<a name="line.186"></a> |
| <span class="sourceLineNo">187</span> justification = "No sure what findbugs wants but looks to me like no NPE")<a name="line.187"></a> |
| <span class="sourceLineNo">188</span> public static int getCompressedSize(Algorithm algo, Compressor compressor, byte[] inputBuffer,<a name="line.188"></a> |
| <span class="sourceLineNo">189</span> int offset, int length) throws IOException {<a name="line.189"></a> |
| <span class="sourceLineNo">190</span><a name="line.190"></a> |
| <span class="sourceLineNo">191</span> // Create streams<a name="line.191"></a> |
| <span class="sourceLineNo">192</span> // Storing them so we can close them<a name="line.192"></a> |
| <span class="sourceLineNo">193</span> final IOUtils.NullOutputStream nullOutputStream = new IOUtils.NullOutputStream();<a name="line.193"></a> |
| <span class="sourceLineNo">194</span> final DataOutputStream compressedStream = new DataOutputStream(nullOutputStream);<a name="line.194"></a> |
| <span class="sourceLineNo">195</span> OutputStream compressingStream = null;<a name="line.195"></a> |
| <span class="sourceLineNo">196</span><a name="line.196"></a> |
| <span class="sourceLineNo">197</span> try {<a name="line.197"></a> |
| <span class="sourceLineNo">198</span> if (compressor != null) {<a name="line.198"></a> |
| <span class="sourceLineNo">199</span> compressor.reset();<a name="line.199"></a> |
| <span class="sourceLineNo">200</span> }<a name="line.200"></a> |
| <span class="sourceLineNo">201</span><a name="line.201"></a> |
| <span class="sourceLineNo">202</span> compressingStream = algo.createCompressionStream(compressedStream, compressor, 0);<a name="line.202"></a> |
| <span class="sourceLineNo">203</span><a name="line.203"></a> |
| <span class="sourceLineNo">204</span> compressingStream.write(inputBuffer, offset, length);<a name="line.204"></a> |
| <span class="sourceLineNo">205</span> compressingStream.flush();<a name="line.205"></a> |
| <span class="sourceLineNo">206</span><a name="line.206"></a> |
| <span class="sourceLineNo">207</span> return compressedStream.size();<a name="line.207"></a> |
| <span class="sourceLineNo">208</span> } finally {<a name="line.208"></a> |
| <span class="sourceLineNo">209</span> nullOutputStream.close();<a name="line.209"></a> |
| <span class="sourceLineNo">210</span> compressedStream.close();<a name="line.210"></a> |
| <span class="sourceLineNo">211</span> if (compressingStream != null) {<a name="line.211"></a> |
| <span class="sourceLineNo">212</span> compressingStream.close();<a name="line.212"></a> |
| <span class="sourceLineNo">213</span> }<a name="line.213"></a> |
| <span class="sourceLineNo">214</span> }<a name="line.214"></a> |
| <span class="sourceLineNo">215</span> }<a name="line.215"></a> |
| <span class="sourceLineNo">216</span><a name="line.216"></a> |
| <span class="sourceLineNo">217</span> /**<a name="line.217"></a> |
| <span class="sourceLineNo">218</span> * Estimate size after second stage of compression (e.g. LZO).<a name="line.218"></a> |
| <span class="sourceLineNo">219</span> * @param comprAlgo compression algorithm to be used for compression<a name="line.219"></a> |
| <span class="sourceLineNo">220</span> * @param compressor compressor corresponding to the given compression algorithm<a name="line.220"></a> |
| <span class="sourceLineNo">221</span> * @return Size after second stage of compression.<a name="line.221"></a> |
| <span class="sourceLineNo">222</span> */<a name="line.222"></a> |
| <span class="sourceLineNo">223</span> public int getEncodedCompressedSize(Algorithm comprAlgo, Compressor compressor)<a name="line.223"></a> |
| <span class="sourceLineNo">224</span> throws IOException {<a name="line.224"></a> |
| <span class="sourceLineNo">225</span> byte[] compressedBytes = getEncodedData();<a name="line.225"></a> |
| <span class="sourceLineNo">226</span> return getCompressedSize(comprAlgo, compressor, compressedBytes, 0, compressedBytes.length);<a name="line.226"></a> |
| <span class="sourceLineNo">227</span> }<a name="line.227"></a> |
| <span class="sourceLineNo">228</span><a name="line.228"></a> |
| <span class="sourceLineNo">229</span> /** Returns encoded data with header */<a name="line.229"></a> |
| <span class="sourceLineNo">230</span> private byte[] getEncodedData() {<a name="line.230"></a> |
| <span class="sourceLineNo">231</span> if (cachedEncodedData != null) {<a name="line.231"></a> |
| <span class="sourceLineNo">232</span> return cachedEncodedData;<a name="line.232"></a> |
| <span class="sourceLineNo">233</span> }<a name="line.233"></a> |
| <span class="sourceLineNo">234</span> cachedEncodedData = encodeData();<a name="line.234"></a> |
| <span class="sourceLineNo">235</span> return cachedEncodedData;<a name="line.235"></a> |
| <span class="sourceLineNo">236</span> }<a name="line.236"></a> |
| <span class="sourceLineNo">237</span><a name="line.237"></a> |
| <span class="sourceLineNo">238</span> private ByteBuffer getUncompressedBuffer() {<a name="line.238"></a> |
| <span class="sourceLineNo">239</span> if (rawBuffer == null || rawBuffer.limit() < rawKVs.length) {<a name="line.239"></a> |
| <span class="sourceLineNo">240</span> rawBuffer = ByteBuffer.wrap(rawKVs);<a name="line.240"></a> |
| <span class="sourceLineNo">241</span> }<a name="line.241"></a> |
| <span class="sourceLineNo">242</span> return rawBuffer;<a name="line.242"></a> |
| <span class="sourceLineNo">243</span> }<a name="line.243"></a> |
| <span class="sourceLineNo">244</span><a name="line.244"></a> |
| <span class="sourceLineNo">245</span> /**<a name="line.245"></a> |
| <span class="sourceLineNo">246</span> * Do the encoding, but do not cache the encoded data.<a name="line.246"></a> |
| <span class="sourceLineNo">247</span> * @return encoded data block with header and checksum<a name="line.247"></a> |
| <span class="sourceLineNo">248</span> */<a name="line.248"></a> |
| <span class="sourceLineNo">249</span> public byte[] encodeData() {<a name="line.249"></a> |
| <span class="sourceLineNo">250</span> ByteArrayOutputStream baos = new ByteArrayOutputStream();<a name="line.250"></a> |
| <span class="sourceLineNo">251</span> byte[] baosBytes = null;<a name="line.251"></a> |
| <span class="sourceLineNo">252</span> try {<a name="line.252"></a> |
| <span class="sourceLineNo">253</span> baos.write(HConstants.HFILEBLOCK_DUMMY_HEADER);<a name="line.253"></a> |
| <span class="sourceLineNo">254</span> DataOutputStream out = new DataOutputStream(baos);<a name="line.254"></a> |
| <span class="sourceLineNo">255</span> this.dataBlockEncoder.startBlockEncoding(encodingCtx, out);<a name="line.255"></a> |
| <span class="sourceLineNo">256</span> ByteBuffer in = getUncompressedBuffer();<a name="line.256"></a> |
| <span class="sourceLineNo">257</span> in.rewind();<a name="line.257"></a> |
| <span class="sourceLineNo">258</span> int klength, vlength;<a name="line.258"></a> |
| <span class="sourceLineNo">259</span> int tagsLength = 0;<a name="line.259"></a> |
| <span class="sourceLineNo">260</span> long memstoreTS = 0L;<a name="line.260"></a> |
| <span class="sourceLineNo">261</span> KeyValue kv = null;<a name="line.261"></a> |
| <span class="sourceLineNo">262</span> while (in.hasRemaining()) {<a name="line.262"></a> |
| <span class="sourceLineNo">263</span> int kvOffset = in.position();<a name="line.263"></a> |
| <span class="sourceLineNo">264</span> klength = in.getInt();<a name="line.264"></a> |
| <span class="sourceLineNo">265</span> vlength = in.getInt();<a name="line.265"></a> |
| <span class="sourceLineNo">266</span> ByteBufferUtils.skip(in, klength + vlength);<a name="line.266"></a> |
| <span class="sourceLineNo">267</span> if (this.meta.isIncludesTags()) {<a name="line.267"></a> |
| <span class="sourceLineNo">268</span> tagsLength = ((in.get() & 0xff) << 8) ^ (in.get() & 0xff);<a name="line.268"></a> |
| <span class="sourceLineNo">269</span> ByteBufferUtils.skip(in, tagsLength);<a name="line.269"></a> |
| <span class="sourceLineNo">270</span> this.isTagsLenZero.add(tagsLength == 0);<a name="line.270"></a> |
| <span class="sourceLineNo">271</span> }<a name="line.271"></a> |
| <span class="sourceLineNo">272</span> if (this.meta.isIncludesMvcc()) {<a name="line.272"></a> |
| <span class="sourceLineNo">273</span> memstoreTS = ByteBufferUtils.readVLong(in);<a name="line.273"></a> |
| <span class="sourceLineNo">274</span> }<a name="line.274"></a> |
| <span class="sourceLineNo">275</span> kv = new KeyValue(in.array(), in.arrayOffset() + kvOffset,<a name="line.275"></a> |
| <span class="sourceLineNo">276</span> (int) KeyValue.getKeyValueDataStructureSize(klength, vlength, tagsLength));<a name="line.276"></a> |
| <span class="sourceLineNo">277</span> kv.setSequenceId(memstoreTS);<a name="line.277"></a> |
| <span class="sourceLineNo">278</span> this.dataBlockEncoder.encode(kv, encodingCtx, out);<a name="line.278"></a> |
| <span class="sourceLineNo">279</span> }<a name="line.279"></a> |
| <span class="sourceLineNo">280</span> // Below depends on BAOS internal behavior. toByteArray makes a copy of bytes so far.<a name="line.280"></a> |
| <span class="sourceLineNo">281</span> baos.flush();<a name="line.281"></a> |
| <span class="sourceLineNo">282</span> baosBytes = baos.toByteArray();<a name="line.282"></a> |
| <span class="sourceLineNo">283</span> this.dataBlockEncoder.endBlockEncoding(encodingCtx, out, baosBytes);<a name="line.283"></a> |
| <span class="sourceLineNo">284</span> // In endBlockEncoding(encodingCtx, out, baosBytes), Encoder ROW_INDEX_V1 write integer in<a name="line.284"></a> |
| <span class="sourceLineNo">285</span> // out while the others write integer in baosBytes(byte array). We need to add<a name="line.285"></a> |
| <span class="sourceLineNo">286</span> // baos.toByteArray() after endBlockEncoding again to make sure the integer writes in<a name="line.286"></a> |
| <span class="sourceLineNo">287</span> // outputstream with Encoder ROW_INDEX_V1 dump to byte array (baosBytes).<a name="line.287"></a> |
| <span class="sourceLineNo">288</span> // The if branch is necessary because Encoders excepts ROW_INDEX_V1 write integer in<a name="line.288"></a> |
| <span class="sourceLineNo">289</span> // baosBytes directly, without if branch and do toByteArray() again, baosBytes won't<a name="line.289"></a> |
| <span class="sourceLineNo">290</span> // contains the integer wrotten in endBlockEncoding.<a name="line.290"></a> |
| <span class="sourceLineNo">291</span> if (this.encoding.equals(DataBlockEncoding.ROW_INDEX_V1)) {<a name="line.291"></a> |
| <span class="sourceLineNo">292</span> baosBytes = baos.toByteArray();<a name="line.292"></a> |
| <span class="sourceLineNo">293</span> }<a name="line.293"></a> |
| <span class="sourceLineNo">294</span> } catch (IOException e) {<a name="line.294"></a> |
| <span class="sourceLineNo">295</span> throw new RuntimeException(String.format("Bug in encoding part of algorithm %s. "<a name="line.295"></a> |
| <span class="sourceLineNo">296</span> + "Probably it requested more bytes than are available.", toString()), e);<a name="line.296"></a> |
| <span class="sourceLineNo">297</span> }<a name="line.297"></a> |
| <span class="sourceLineNo">298</span> return baosBytes;<a name="line.298"></a> |
| <span class="sourceLineNo">299</span> }<a name="line.299"></a> |
| <span class="sourceLineNo">300</span><a name="line.300"></a> |
| <span class="sourceLineNo">301</span> @Override<a name="line.301"></a> |
| <span class="sourceLineNo">302</span> public String toString() {<a name="line.302"></a> |
| <span class="sourceLineNo">303</span> return encoding.name();<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> |
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| </pre> |
| </div> |
| </body> |
| </html> |
