| <!DOCTYPE HTML> |
| <html lang="en"> |
| <head> |
| <!-- Generated by javadoc (17) --> |
| <title>Source code</title> |
| <meta name="viewport" content="width=device-width, initial-scale=1"> |
| <meta name="description" content="source: package: org.apache.hadoop.hbase.regionserver, class: StripeMultiFileWriter, class: BoundaryMultiWriter"> |
| <meta name="generator" content="javadoc/SourceToHTMLConverter"> |
| <link rel="stylesheet" type="text/css" href="../../../../../../stylesheet.css" title="Style"> |
| </head> |
| <body class="source-page"> |
| <main role="main"> |
| <div class="source-container"> |
| <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.regionserver;</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.IOException;</span> |
| <span class="source-line-no">021</span><span id="line-21">import java.util.ArrayList;</span> |
| <span class="source-line-no">022</span><span id="line-22">import java.util.Arrays;</span> |
| <span class="source-line-no">023</span><span id="line-23">import java.util.Collection;</span> |
| <span class="source-line-no">024</span><span id="line-24">import java.util.Collections;</span> |
| <span class="source-line-no">025</span><span id="line-25">import java.util.List;</span> |
| <span class="source-line-no">026</span><span id="line-26">import org.apache.hadoop.hbase.Cell;</span> |
| <span class="source-line-no">027</span><span id="line-27">import org.apache.hadoop.hbase.CellComparator;</span> |
| <span class="source-line-no">028</span><span id="line-28">import org.apache.hadoop.hbase.CellUtil;</span> |
| <span class="source-line-no">029</span><span id="line-29">import org.apache.hadoop.hbase.ExtendedCell;</span> |
| <span class="source-line-no">030</span><span id="line-30">import org.apache.hadoop.hbase.PrivateCellUtil;</span> |
| <span class="source-line-no">031</span><span id="line-31">import org.apache.hadoop.hbase.util.Bytes;</span> |
| <span class="source-line-no">032</span><span id="line-32">import org.apache.yetus.audience.InterfaceAudience;</span> |
| <span class="source-line-no">033</span><span id="line-33">import org.slf4j.Logger;</span> |
| <span class="source-line-no">034</span><span id="line-34">import org.slf4j.LoggerFactory;</span> |
| <span class="source-line-no">035</span><span id="line-35"></span> |
| <span class="source-line-no">036</span><span id="line-36">/**</span> |
| <span class="source-line-no">037</span><span id="line-37"> * Base class for cell sink that separates the provided cells into multiple files for stripe</span> |
| <span class="source-line-no">038</span><span id="line-38"> * compaction.</span> |
| <span class="source-line-no">039</span><span id="line-39"> */</span> |
| <span class="source-line-no">040</span><span id="line-40">@InterfaceAudience.Private</span> |
| <span class="source-line-no">041</span><span id="line-41">public abstract class StripeMultiFileWriter extends AbstractMultiFileWriter {</span> |
| <span class="source-line-no">042</span><span id="line-42"></span> |
| <span class="source-line-no">043</span><span id="line-43"> private static final Logger LOG = LoggerFactory.getLogger(StripeMultiFileWriter.class);</span> |
| <span class="source-line-no">044</span><span id="line-44"></span> |
| <span class="source-line-no">045</span><span id="line-45"> protected final CellComparator comparator;</span> |
| <span class="source-line-no">046</span><span id="line-46"> protected List<StoreFileWriter> existingWriters;</span> |
| <span class="source-line-no">047</span><span id="line-47"> protected List<byte[]> boundaries;</span> |
| <span class="source-line-no">048</span><span id="line-48"></span> |
| <span class="source-line-no">049</span><span id="line-49"> /** Whether to write stripe metadata */</span> |
| <span class="source-line-no">050</span><span id="line-50"> private boolean doWriteStripeMetadata = true;</span> |
| <span class="source-line-no">051</span><span id="line-51"></span> |
| <span class="source-line-no">052</span><span id="line-52"> public StripeMultiFileWriter(CellComparator comparator) {</span> |
| <span class="source-line-no">053</span><span id="line-53"> this.comparator = comparator;</span> |
| <span class="source-line-no">054</span><span id="line-54"> }</span> |
| <span class="source-line-no">055</span><span id="line-55"></span> |
| <span class="source-line-no">056</span><span id="line-56"> public void setNoStripeMetadata() {</span> |
| <span class="source-line-no">057</span><span id="line-57"> this.doWriteStripeMetadata = false;</span> |
| <span class="source-line-no">058</span><span id="line-58"> }</span> |
| <span class="source-line-no">059</span><span id="line-59"></span> |
| <span class="source-line-no">060</span><span id="line-60"> @Override</span> |
| <span class="source-line-no">061</span><span id="line-61"> protected Collection<StoreFileWriter> writers() {</span> |
| <span class="source-line-no">062</span><span id="line-62"> return existingWriters;</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"> protected abstract void preCommitWritersInternal() throws IOException;</span> |
| <span class="source-line-no">066</span><span id="line-66"></span> |
| <span class="source-line-no">067</span><span id="line-67"> @Override</span> |
| <span class="source-line-no">068</span><span id="line-68"> protected final void preCommitWriters() throws IOException {</span> |
| <span class="source-line-no">069</span><span id="line-69"> // do some sanity check here.</span> |
| <span class="source-line-no">070</span><span id="line-70"> assert this.existingWriters != null;</span> |
| <span class="source-line-no">071</span><span id="line-71"> preCommitWritersInternal();</span> |
| <span class="source-line-no">072</span><span id="line-72"> assert this.boundaries.size() == (this.existingWriters.size() + 1);</span> |
| <span class="source-line-no">073</span><span id="line-73"> }</span> |
| <span class="source-line-no">074</span><span id="line-74"></span> |
| <span class="source-line-no">075</span><span id="line-75"> @Override</span> |
| <span class="source-line-no">076</span><span id="line-76"> protected void preCloseWriter(StoreFileWriter writer) throws IOException {</span> |
| <span class="source-line-no">077</span><span id="line-77"> if (doWriteStripeMetadata) {</span> |
| <span class="source-line-no">078</span><span id="line-78"> if (LOG.isDebugEnabled()) {</span> |
| <span class="source-line-no">079</span><span id="line-79"> LOG.debug("Write stripe metadata for " + writer.getPath().toString());</span> |
| <span class="source-line-no">080</span><span id="line-80"> }</span> |
| <span class="source-line-no">081</span><span id="line-81"> int index = existingWriters.indexOf(writer);</span> |
| <span class="source-line-no">082</span><span id="line-82"> writer.appendFileInfo(StripeStoreFileManager.STRIPE_START_KEY, boundaries.get(index));</span> |
| <span class="source-line-no">083</span><span id="line-83"> writer.appendFileInfo(StripeStoreFileManager.STRIPE_END_KEY, boundaries.get(index + 1));</span> |
| <span class="source-line-no">084</span><span id="line-84"> } else {</span> |
| <span class="source-line-no">085</span><span id="line-85"> if (LOG.isDebugEnabled()) {</span> |
| <span class="source-line-no">086</span><span id="line-86"> LOG.debug("Skip writing stripe metadata for " + writer.getPath().toString());</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"> }</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"> * Subclasses can call this method to make sure the first KV is within multi-writer range.</span> |
| <span class="source-line-no">093</span><span id="line-93"> * @param left The left boundary of the writer.</span> |
| <span class="source-line-no">094</span><span id="line-94"> * @param cell The cell whose row has to be checked.</span> |
| <span class="source-line-no">095</span><span id="line-95"> */</span> |
| <span class="source-line-no">096</span><span id="line-96"> protected void sanityCheckLeft(byte[] left, Cell cell) throws IOException {</span> |
| <span class="source-line-no">097</span><span id="line-97"> if (</span> |
| <span class="source-line-no">098</span><span id="line-98"> !Arrays.equals(StripeStoreFileManager.OPEN_KEY, left)</span> |
| <span class="source-line-no">099</span><span id="line-99"> && comparator.compareRows(cell, left, 0, left.length) < 0</span> |
| <span class="source-line-no">100</span><span id="line-100"> ) {</span> |
| <span class="source-line-no">101</span><span id="line-101"> String error =</span> |
| <span class="source-line-no">102</span><span id="line-102"> "The first row is lower than the left boundary of [" + Bytes.toString(left) + "]: ["</span> |
| <span class="source-line-no">103</span><span id="line-103"> + Bytes.toString(cell.getRowArray(), cell.getRowOffset(), cell.getRowLength()) + "]";</span> |
| <span class="source-line-no">104</span><span id="line-104"> LOG.error(error);</span> |
| <span class="source-line-no">105</span><span id="line-105"> throw new IOException(error);</span> |
| <span class="source-line-no">106</span><span id="line-106"> }</span> |
| <span class="source-line-no">107</span><span id="line-107"> }</span> |
| <span class="source-line-no">108</span><span id="line-108"></span> |
| <span class="source-line-no">109</span><span id="line-109"> /**</span> |
| <span class="source-line-no">110</span><span id="line-110"> * Subclasses can call this method to make sure the last KV is within multi-writer range.</span> |
| <span class="source-line-no">111</span><span id="line-111"> * @param right The right boundary of the writer.</span> |
| <span class="source-line-no">112</span><span id="line-112"> */</span> |
| <span class="source-line-no">113</span><span id="line-113"> protected void sanityCheckRight(byte[] right, Cell cell) throws IOException {</span> |
| <span class="source-line-no">114</span><span id="line-114"> if (</span> |
| <span class="source-line-no">115</span><span id="line-115"> !Arrays.equals(StripeStoreFileManager.OPEN_KEY, right)</span> |
| <span class="source-line-no">116</span><span id="line-116"> && comparator.compareRows(cell, right, 0, right.length) >= 0</span> |
| <span class="source-line-no">117</span><span id="line-117"> ) {</span> |
| <span class="source-line-no">118</span><span id="line-118"> String error = "The last row is higher or equal than the right boundary of ["</span> |
| <span class="source-line-no">119</span><span id="line-119"> + Bytes.toString(right) + "]: ["</span> |
| <span class="source-line-no">120</span><span id="line-120"> + Bytes.toString(cell.getRowArray(), cell.getRowOffset(), cell.getRowLength()) + "]";</span> |
| <span class="source-line-no">121</span><span id="line-121"> LOG.error(error);</span> |
| <span class="source-line-no">122</span><span id="line-122"> throw new IOException(error);</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"></span> |
| <span class="source-line-no">126</span><span id="line-126"> /**</span> |
| <span class="source-line-no">127</span><span id="line-127"> * MultiWriter that separates the cells based on fixed row-key boundaries. All the KVs between</span> |
| <span class="source-line-no">128</span><span id="line-128"> * each pair of neighboring boundaries from the list supplied to ctor will end up in one file, and</span> |
| <span class="source-line-no">129</span><span id="line-129"> * separate from all other such pairs.</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 static class BoundaryMultiWriter extends StripeMultiFileWriter {</span> |
| <span class="source-line-no">132</span><span id="line-132"> private StoreFileWriter currentWriter;</span> |
| <span class="source-line-no">133</span><span id="line-133"> private byte[] currentWriterEndKey;</span> |
| <span class="source-line-no">134</span><span id="line-134"></span> |
| <span class="source-line-no">135</span><span id="line-135"> private Cell lastCell;</span> |
| <span class="source-line-no">136</span><span id="line-136"> private long cellsInCurrentWriter = 0;</span> |
| <span class="source-line-no">137</span><span id="line-137"> private int majorRangeFromIndex = -1, majorRangeToIndex = -1;</span> |
| <span class="source-line-no">138</span><span id="line-138"> private boolean hasAnyWriter = false;</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"> * @param targetBoundaries The boundaries on which writers/files are separated.</span> |
| <span class="source-line-no">142</span><span id="line-142"> * @param majorRangeFrom Major range is the range for which at least one file should be</span> |
| <span class="source-line-no">143</span><span id="line-143"> * written (because all files are included in compaction).</span> |
| <span class="source-line-no">144</span><span id="line-144"> * majorRangeFrom is the left boundary.</span> |
| <span class="source-line-no">145</span><span id="line-145"> * @param majorRangeTo The right boundary of majorRange (see majorRangeFrom).</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 BoundaryMultiWriter(CellComparator comparator, List<byte[]> targetBoundaries,</span> |
| <span class="source-line-no">148</span><span id="line-148"> byte[] majorRangeFrom, byte[] majorRangeTo) throws IOException {</span> |
| <span class="source-line-no">149</span><span id="line-149"> super(comparator);</span> |
| <span class="source-line-no">150</span><span id="line-150"> this.boundaries = targetBoundaries;</span> |
| <span class="source-line-no">151</span><span id="line-151"> this.existingWriters = new ArrayList<>(this.boundaries.size() - 1);</span> |
| <span class="source-line-no">152</span><span id="line-152"> // "major" range (range for which all files are included) boundaries, if any,</span> |
| <span class="source-line-no">153</span><span id="line-153"> // must match some target boundaries, let's find them.</span> |
| <span class="source-line-no">154</span><span id="line-154"> assert (majorRangeFrom == null) == (majorRangeTo == null);</span> |
| <span class="source-line-no">155</span><span id="line-155"> if (majorRangeFrom != null) {</span> |
| <span class="source-line-no">156</span><span id="line-156"> majorRangeFromIndex = Arrays.equals(majorRangeFrom, StripeStoreFileManager.OPEN_KEY)</span> |
| <span class="source-line-no">157</span><span id="line-157"> ? 0</span> |
| <span class="source-line-no">158</span><span id="line-158"> : Collections.binarySearch(boundaries, majorRangeFrom, Bytes.BYTES_COMPARATOR);</span> |
| <span class="source-line-no">159</span><span id="line-159"> majorRangeToIndex = Arrays.equals(majorRangeTo, StripeStoreFileManager.OPEN_KEY)</span> |
| <span class="source-line-no">160</span><span id="line-160"> ? boundaries.size()</span> |
| <span class="source-line-no">161</span><span id="line-161"> : Collections.binarySearch(boundaries, majorRangeTo, Bytes.BYTES_COMPARATOR);</span> |
| <span class="source-line-no">162</span><span id="line-162"> if (this.majorRangeFromIndex < 0 || this.majorRangeToIndex < 0) {</span> |
| <span class="source-line-no">163</span><span id="line-163"> throw new IOException("Major range does not match writer boundaries: ["</span> |
| <span class="source-line-no">164</span><span id="line-164"> + Bytes.toString(majorRangeFrom) + "] [" + Bytes.toString(majorRangeTo) + "]; from "</span> |
| <span class="source-line-no">165</span><span id="line-165"> + majorRangeFromIndex + " to " + majorRangeToIndex);</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"> @Override</span> |
| <span class="source-line-no">171</span><span id="line-171"> public void append(ExtendedCell cell) throws IOException {</span> |
| <span class="source-line-no">172</span><span id="line-172"> if (currentWriter == null && existingWriters.isEmpty()) {</span> |
| <span class="source-line-no">173</span><span id="line-173"> // First append ever, do a sanity check.</span> |
| <span class="source-line-no">174</span><span id="line-174"> sanityCheckLeft(this.boundaries.get(0), cell);</span> |
| <span class="source-line-no">175</span><span id="line-175"> }</span> |
| <span class="source-line-no">176</span><span id="line-176"> prepareWriterFor(cell);</span> |
| <span class="source-line-no">177</span><span id="line-177"> currentWriter.append(cell);</span> |
| <span class="source-line-no">178</span><span id="line-178"> lastCell = cell; // for the sanity check</span> |
| <span class="source-line-no">179</span><span id="line-179"> ++cellsInCurrentWriter;</span> |
| <span class="source-line-no">180</span><span id="line-180"> }</span> |
| <span class="source-line-no">181</span><span id="line-181"></span> |
| <span class="source-line-no">182</span><span id="line-182"> private boolean isCellAfterCurrentWriter(Cell cell) {</span> |
| <span class="source-line-no">183</span><span id="line-183"> return !Arrays.equals(currentWriterEndKey, StripeStoreFileManager.OPEN_KEY)</span> |
| <span class="source-line-no">184</span><span id="line-184"> && (comparator.compareRows(cell, currentWriterEndKey, 0, currentWriterEndKey.length) >= 0);</span> |
| <span class="source-line-no">185</span><span id="line-185"> }</span> |
| <span class="source-line-no">186</span><span id="line-186"></span> |
| <span class="source-line-no">187</span><span id="line-187"> @Override</span> |
| <span class="source-line-no">188</span><span id="line-188"> protected void preCommitWritersInternal() throws IOException {</span> |
| <span class="source-line-no">189</span><span id="line-189"> stopUsingCurrentWriter();</span> |
| <span class="source-line-no">190</span><span id="line-190"> while (existingWriters.size() < boundaries.size() - 1) {</span> |
| <span class="source-line-no">191</span><span id="line-191"> createEmptyWriter();</span> |
| <span class="source-line-no">192</span><span id="line-192"> }</span> |
| <span class="source-line-no">193</span><span id="line-193"> if (lastCell != null) {</span> |
| <span class="source-line-no">194</span><span id="line-194"> sanityCheckRight(boundaries.get(boundaries.size() - 1), lastCell);</span> |
| <span class="source-line-no">195</span><span id="line-195"> }</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"> private void prepareWriterFor(Cell cell) throws IOException {</span> |
| <span class="source-line-no">199</span><span id="line-199"> if (currentWriter != null && !isCellAfterCurrentWriter(cell)) return; // Use same writer.</span> |
| <span class="source-line-no">200</span><span id="line-200"></span> |
| <span class="source-line-no">201</span><span id="line-201"> stopUsingCurrentWriter();</span> |
| <span class="source-line-no">202</span><span id="line-202"> // See if KV will be past the writer we are about to create; need to add another one.</span> |
| <span class="source-line-no">203</span><span id="line-203"> while (isCellAfterCurrentWriter(cell)) {</span> |
| <span class="source-line-no">204</span><span id="line-204"> checkCanCreateWriter();</span> |
| <span class="source-line-no">205</span><span id="line-205"> createEmptyWriter();</span> |
| <span class="source-line-no">206</span><span id="line-206"> }</span> |
| <span class="source-line-no">207</span><span id="line-207"> checkCanCreateWriter();</span> |
| <span class="source-line-no">208</span><span id="line-208"> hasAnyWriter = true;</span> |
| <span class="source-line-no">209</span><span id="line-209"> currentWriter = writerFactory.createWriter();</span> |
| <span class="source-line-no">210</span><span id="line-210"> existingWriters.add(currentWriter);</span> |
| <span class="source-line-no">211</span><span id="line-211"> }</span> |
| <span class="source-line-no">212</span><span id="line-212"></span> |
| <span class="source-line-no">213</span><span id="line-213"> /**</span> |
| <span class="source-line-no">214</span><span id="line-214"> * Called if there are no cells for some stripe. We need to have something in the writer list</span> |
| <span class="source-line-no">215</span><span id="line-215"> * for this stripe, so that writer-boundary list indices correspond to each other. We can insert</span> |
| <span class="source-line-no">216</span><span id="line-216"> * null in the writer list for that purpose, except in the following cases where we actually</span> |
| <span class="source-line-no">217</span><span id="line-217"> * need a file: 1) If we are in range for which we are compacting all the files, we need to</span> |
| <span class="source-line-no">218</span><span id="line-218"> * create an empty file to preserve stripe metadata. 2) If we have not produced any file at all</span> |
| <span class="source-line-no">219</span><span id="line-219"> * for this compactions, and this is the last chance (the last stripe), we need to preserve last</span> |
| <span class="source-line-no">220</span><span id="line-220"> * seqNum (see also HBASE-6059).</span> |
| <span class="source-line-no">221</span><span id="line-221"> */</span> |
| <span class="source-line-no">222</span><span id="line-222"> private void createEmptyWriter() throws IOException {</span> |
| <span class="source-line-no">223</span><span id="line-223"> int index = existingWriters.size();</span> |
| <span class="source-line-no">224</span><span id="line-224"> boolean isInMajorRange = (index >= majorRangeFromIndex) && (index < majorRangeToIndex);</span> |
| <span class="source-line-no">225</span><span id="line-225"> // Stripe boundary count = stripe count + 1, so last stripe index is (#boundaries minus 2)</span> |
| <span class="source-line-no">226</span><span id="line-226"> boolean isLastWriter = !hasAnyWriter && (index == (boundaries.size() - 2));</span> |
| <span class="source-line-no">227</span><span id="line-227"> boolean needEmptyFile = isInMajorRange || isLastWriter;</span> |
| <span class="source-line-no">228</span><span id="line-228"> existingWriters.add(needEmptyFile ? writerFactory.createWriter() : null);</span> |
| <span class="source-line-no">229</span><span id="line-229"> hasAnyWriter |= needEmptyFile;</span> |
| <span class="source-line-no">230</span><span id="line-230"> currentWriterEndKey = (existingWriters.size() + 1 == boundaries.size())</span> |
| <span class="source-line-no">231</span><span id="line-231"> ? null</span> |
| <span class="source-line-no">232</span><span id="line-232"> : boundaries.get(existingWriters.size() + 1);</span> |
| <span class="source-line-no">233</span><span id="line-233"> }</span> |
| <span class="source-line-no">234</span><span id="line-234"></span> |
| <span class="source-line-no">235</span><span id="line-235"> private void checkCanCreateWriter() throws IOException {</span> |
| <span class="source-line-no">236</span><span id="line-236"> int maxWriterCount = boundaries.size() - 1;</span> |
| <span class="source-line-no">237</span><span id="line-237"> assert existingWriters.size() <= maxWriterCount;</span> |
| <span class="source-line-no">238</span><span id="line-238"> if (existingWriters.size() >= maxWriterCount) {</span> |
| <span class="source-line-no">239</span><span id="line-239"> throw new IOException("Cannot create any more writers (created " + existingWriters.size()</span> |
| <span class="source-line-no">240</span><span id="line-240"> + " out of " + maxWriterCount + " - row might be out of range of all valid writers");</span> |
| <span class="source-line-no">241</span><span id="line-241"> }</span> |
| <span class="source-line-no">242</span><span id="line-242"> }</span> |
| <span class="source-line-no">243</span><span id="line-243"></span> |
| <span class="source-line-no">244</span><span id="line-244"> private void stopUsingCurrentWriter() {</span> |
| <span class="source-line-no">245</span><span id="line-245"> if (currentWriter != null) {</span> |
| <span class="source-line-no">246</span><span id="line-246"> if (LOG.isDebugEnabled()) {</span> |
| <span class="source-line-no">247</span><span id="line-247"> LOG.debug("Stopping to use a writer after [" + Bytes.toString(currentWriterEndKey)</span> |
| <span class="source-line-no">248</span><span id="line-248"> + "] row; wrote out " + cellsInCurrentWriter + " kvs");</span> |
| <span class="source-line-no">249</span><span id="line-249"> }</span> |
| <span class="source-line-no">250</span><span id="line-250"> cellsInCurrentWriter = 0;</span> |
| <span class="source-line-no">251</span><span id="line-251"> }</span> |
| <span class="source-line-no">252</span><span id="line-252"> currentWriter = null;</span> |
| <span class="source-line-no">253</span><span id="line-253"> currentWriterEndKey = (existingWriters.size() + 1 == boundaries.size())</span> |
| <span class="source-line-no">254</span><span id="line-254"> ? null</span> |
| <span class="source-line-no">255</span><span id="line-255"> : boundaries.get(existingWriters.size() + 1);</span> |
| <span class="source-line-no">256</span><span id="line-256"> }</span> |
| <span class="source-line-no">257</span><span id="line-257"> }</span> |
| <span class="source-line-no">258</span><span id="line-258"></span> |
| <span class="source-line-no">259</span><span id="line-259"> /**</span> |
| <span class="source-line-no">260</span><span id="line-260"> * MultiWriter that separates the cells based on target cell number per file and file count. New</span> |
| <span class="source-line-no">261</span><span id="line-261"> * file is started every time the target number of KVs is reached, unless the fixed count of</span> |
| <span class="source-line-no">262</span><span id="line-262"> * writers has already been created (in that case all the remaining KVs go into the last writer).</span> |
| <span class="source-line-no">263</span><span id="line-263"> */</span> |
| <span class="source-line-no">264</span><span id="line-264"> public static class SizeMultiWriter extends StripeMultiFileWriter {</span> |
| <span class="source-line-no">265</span><span id="line-265"> private int targetCount;</span> |
| <span class="source-line-no">266</span><span id="line-266"> private long targetCells;</span> |
| <span class="source-line-no">267</span><span id="line-267"> private byte[] left;</span> |
| <span class="source-line-no">268</span><span id="line-268"> private byte[] right;</span> |
| <span class="source-line-no">269</span><span id="line-269"></span> |
| <span class="source-line-no">270</span><span id="line-270"> private Cell lastCell;</span> |
| <span class="source-line-no">271</span><span id="line-271"> private StoreFileWriter currentWriter;</span> |
| <span class="source-line-no">272</span><span id="line-272"> protected byte[] lastRowInCurrentWriter = null;</span> |
| <span class="source-line-no">273</span><span id="line-273"> private long cellsInCurrentWriter = 0;</span> |
| <span class="source-line-no">274</span><span id="line-274"> private long cellsSeen = 0;</span> |
| <span class="source-line-no">275</span><span id="line-275"> private long cellsSeenInPrevious = 0;</span> |
| <span class="source-line-no">276</span><span id="line-276"></span> |
| <span class="source-line-no">277</span><span id="line-277"> /**</span> |
| <span class="source-line-no">278</span><span id="line-278"> * @param targetCount The maximum count of writers that can be created.</span> |
| <span class="source-line-no">279</span><span id="line-279"> * @param targetKvs The number of KVs to read from source before starting each new writer.</span> |
| <span class="source-line-no">280</span><span id="line-280"> * @param left The left boundary of the first writer.</span> |
| <span class="source-line-no">281</span><span id="line-281"> * @param right The right boundary of the last writer.</span> |
| <span class="source-line-no">282</span><span id="line-282"> */</span> |
| <span class="source-line-no">283</span><span id="line-283"> public SizeMultiWriter(CellComparator comparator, int targetCount, long targetKvs, byte[] left,</span> |
| <span class="source-line-no">284</span><span id="line-284"> byte[] right) {</span> |
| <span class="source-line-no">285</span><span id="line-285"> super(comparator);</span> |
| <span class="source-line-no">286</span><span id="line-286"> this.targetCount = targetCount;</span> |
| <span class="source-line-no">287</span><span id="line-287"> this.targetCells = targetKvs;</span> |
| <span class="source-line-no">288</span><span id="line-288"> this.left = left;</span> |
| <span class="source-line-no">289</span><span id="line-289"> this.right = right;</span> |
| <span class="source-line-no">290</span><span id="line-290"> int preallocate = Math.min(this.targetCount, 64);</span> |
| <span class="source-line-no">291</span><span id="line-291"> this.existingWriters = new ArrayList<>(preallocate);</span> |
| <span class="source-line-no">292</span><span id="line-292"> this.boundaries = new ArrayList<>(preallocate + 1);</span> |
| <span class="source-line-no">293</span><span id="line-293"> }</span> |
| <span class="source-line-no">294</span><span id="line-294"></span> |
| <span class="source-line-no">295</span><span id="line-295"> @Override</span> |
| <span class="source-line-no">296</span><span id="line-296"> public void append(ExtendedCell cell) throws IOException {</span> |
| <span class="source-line-no">297</span><span id="line-297"> // If we are waiting for opportunity to close and we started writing different row,</span> |
| <span class="source-line-no">298</span><span id="line-298"> // discard the writer and stop waiting.</span> |
| <span class="source-line-no">299</span><span id="line-299"> boolean doCreateWriter = false;</span> |
| <span class="source-line-no">300</span><span id="line-300"> if (currentWriter == null) {</span> |
| <span class="source-line-no">301</span><span id="line-301"> // First append ever, do a sanity check.</span> |
| <span class="source-line-no">302</span><span id="line-302"> sanityCheckLeft(left, cell);</span> |
| <span class="source-line-no">303</span><span id="line-303"> doCreateWriter = true;</span> |
| <span class="source-line-no">304</span><span id="line-304"> } else if (</span> |
| <span class="source-line-no">305</span><span id="line-305"> lastRowInCurrentWriter != null && !PrivateCellUtil.matchingRows(cell,</span> |
| <span class="source-line-no">306</span><span id="line-306"> lastRowInCurrentWriter, 0, lastRowInCurrentWriter.length)</span> |
| <span class="source-line-no">307</span><span id="line-307"> ) {</span> |
| <span class="source-line-no">308</span><span id="line-308"> if (LOG.isDebugEnabled()) {</span> |
| <span class="source-line-no">309</span><span id="line-309"> LOG.debug("Stopping to use a writer after [" + Bytes.toString(lastRowInCurrentWriter)</span> |
| <span class="source-line-no">310</span><span id="line-310"> + "] row; wrote out " + cellsInCurrentWriter + " kvs");</span> |
| <span class="source-line-no">311</span><span id="line-311"> }</span> |
| <span class="source-line-no">312</span><span id="line-312"> lastRowInCurrentWriter = null;</span> |
| <span class="source-line-no">313</span><span id="line-313"> cellsInCurrentWriter = 0;</span> |
| <span class="source-line-no">314</span><span id="line-314"> cellsSeenInPrevious += cellsSeen;</span> |
| <span class="source-line-no">315</span><span id="line-315"> doCreateWriter = true;</span> |
| <span class="source-line-no">316</span><span id="line-316"> }</span> |
| <span class="source-line-no">317</span><span id="line-317"> if (doCreateWriter) {</span> |
| <span class="source-line-no">318</span><span id="line-318"> // make a copy</span> |
| <span class="source-line-no">319</span><span id="line-319"> byte[] boundary = existingWriters.isEmpty() ? left : CellUtil.cloneRow(cell);</span> |
| <span class="source-line-no">320</span><span id="line-320"> if (LOG.isDebugEnabled()) {</span> |
| <span class="source-line-no">321</span><span id="line-321"> LOG.debug("Creating new writer starting at [" + Bytes.toString(boundary) + "]");</span> |
| <span class="source-line-no">322</span><span id="line-322"> }</span> |
| <span class="source-line-no">323</span><span id="line-323"> currentWriter = writerFactory.createWriter();</span> |
| <span class="source-line-no">324</span><span id="line-324"> boundaries.add(boundary);</span> |
| <span class="source-line-no">325</span><span id="line-325"> existingWriters.add(currentWriter);</span> |
| <span class="source-line-no">326</span><span id="line-326"> }</span> |
| <span class="source-line-no">327</span><span id="line-327"></span> |
| <span class="source-line-no">328</span><span id="line-328"> currentWriter.append(cell);</span> |
| <span class="source-line-no">329</span><span id="line-329"> lastCell = cell; // for the sanity check</span> |
| <span class="source-line-no">330</span><span id="line-330"> ++cellsInCurrentWriter;</span> |
| <span class="source-line-no">331</span><span id="line-331"> cellsSeen = cellsInCurrentWriter;</span> |
| <span class="source-line-no">332</span><span id="line-332"> if (this.sourceScanner != null) {</span> |
| <span class="source-line-no">333</span><span id="line-333"> cellsSeen = Math.max(cellsSeen,</span> |
| <span class="source-line-no">334</span><span id="line-334"> this.sourceScanner.getEstimatedNumberOfKvsScanned() - cellsSeenInPrevious);</span> |
| <span class="source-line-no">335</span><span id="line-335"> }</span> |
| <span class="source-line-no">336</span><span id="line-336"></span> |
| <span class="source-line-no">337</span><span id="line-337"> // If we are not already waiting for opportunity to close, start waiting if we can</span> |
| <span class="source-line-no">338</span><span id="line-338"> // create any more writers and if the current one is too big.</span> |
| <span class="source-line-no">339</span><span id="line-339"> if (</span> |
| <span class="source-line-no">340</span><span id="line-340"> lastRowInCurrentWriter == null && existingWriters.size() < targetCount</span> |
| <span class="source-line-no">341</span><span id="line-341"> && cellsSeen >= targetCells</span> |
| <span class="source-line-no">342</span><span id="line-342"> ) {</span> |
| <span class="source-line-no">343</span><span id="line-343"> lastRowInCurrentWriter = CellUtil.cloneRow(cell); // make a copy</span> |
| <span class="source-line-no">344</span><span id="line-344"> if (LOG.isDebugEnabled()) {</span> |
| <span class="source-line-no">345</span><span id="line-345"> LOG.debug("Preparing to start a new writer after ["</span> |
| <span class="source-line-no">346</span><span id="line-346"> + Bytes.toString(lastRowInCurrentWriter) + "] row; observed " + cellsSeen</span> |
| <span class="source-line-no">347</span><span id="line-347"> + " kvs and wrote out " + cellsInCurrentWriter + " kvs");</span> |
| <span class="source-line-no">348</span><span id="line-348"> }</span> |
| <span class="source-line-no">349</span><span id="line-349"> }</span> |
| <span class="source-line-no">350</span><span id="line-350"> }</span> |
| <span class="source-line-no">351</span><span id="line-351"></span> |
| <span class="source-line-no">352</span><span id="line-352"> @Override</span> |
| <span class="source-line-no">353</span><span id="line-353"> protected void preCommitWritersInternal() throws IOException {</span> |
| <span class="source-line-no">354</span><span id="line-354"> if (LOG.isDebugEnabled()) {</span> |
| <span class="source-line-no">355</span><span id="line-355"> LOG.debug("Stopping with " + cellsInCurrentWriter + " kvs in last writer"</span> |
| <span class="source-line-no">356</span><span id="line-356"> + ((this.sourceScanner == null)</span> |
| <span class="source-line-no">357</span><span id="line-357"> ? ""</span> |
| <span class="source-line-no">358</span><span id="line-358"> : ("; observed estimated " + this.sourceScanner.getEstimatedNumberOfKvsScanned()</span> |
| <span class="source-line-no">359</span><span id="line-359"> + " KVs total")));</span> |
| <span class="source-line-no">360</span><span id="line-360"> }</span> |
| <span class="source-line-no">361</span><span id="line-361"> if (lastCell != null) {</span> |
| <span class="source-line-no">362</span><span id="line-362"> sanityCheckRight(right, lastCell);</span> |
| <span class="source-line-no">363</span><span id="line-363"> }</span> |
| <span class="source-line-no">364</span><span id="line-364"></span> |
| <span class="source-line-no">365</span><span id="line-365"> // When expired stripes were going to be merged into one, and if no writer was created during</span> |
| <span class="source-line-no">366</span><span id="line-366"> // the compaction, we need to create an empty file to preserve metadata.</span> |
| <span class="source-line-no">367</span><span id="line-367"> if (existingWriters.isEmpty() && 1 == targetCount) {</span> |
| <span class="source-line-no">368</span><span id="line-368"> if (LOG.isDebugEnabled()) {</span> |
| <span class="source-line-no">369</span><span id="line-369"> LOG.debug("Merge expired stripes into one, create an empty file to preserve metadata.");</span> |
| <span class="source-line-no">370</span><span id="line-370"> }</span> |
| <span class="source-line-no">371</span><span id="line-371"> boundaries.add(left);</span> |
| <span class="source-line-no">372</span><span id="line-372"> existingWriters.add(writerFactory.createWriter());</span> |
| <span class="source-line-no">373</span><span id="line-373"> }</span> |
| <span class="source-line-no">374</span><span id="line-374"></span> |
| <span class="source-line-no">375</span><span id="line-375"> this.boundaries.add(right);</span> |
| <span class="source-line-no">376</span><span id="line-376"> }</span> |
| <span class="source-line-no">377</span><span id="line-377"> }</span> |
| <span class="source-line-no">378</span><span id="line-378">}</span> |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| </pre> |
| </div> |
| </main> |
| </body> |
| </html> |
