You are viewing a plain text version of this content. The canonical link for it is here.
Posted to commits@hbase.apache.org by gi...@apache.org on 2018/10/07 14:53:04 UTC
[18/47] hbase-site git commit: Published site at
118b0746849c886fc64b0a53014f3186e2db4d9d.
http://git-wip-us.apache.org/repos/asf/hbase-site/blob/9b6ca5d1/devapidocs/src-html/org/apache/hadoop/hbase/procedure2/store/wal/ProcedureWALPrettyPrinter.html
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diff --git a/devapidocs/src-html/org/apache/hadoop/hbase/procedure2/store/wal/ProcedureWALPrettyPrinter.html b/devapidocs/src-html/org/apache/hadoop/hbase/procedure2/store/wal/ProcedureWALPrettyPrinter.html
index 11f570d..6cdebcf 100644
--- a/devapidocs/src-html/org/apache/hadoop/hbase/procedure2/store/wal/ProcedureWALPrettyPrinter.html
+++ b/devapidocs/src-html/org/apache/hadoop/hbase/procedure2/store/wal/ProcedureWALPrettyPrinter.html
@@ -29,31 +29,31 @@
<span class="sourceLineNo">021</span>import java.io.PrintStream;<a name="line.21"></a>
<span class="sourceLineNo">022</span>import java.util.ArrayList;<a name="line.22"></a>
<span class="sourceLineNo">023</span>import java.util.List;<a name="line.23"></a>
-<span class="sourceLineNo">024</span><a name="line.24"></a>
-<span class="sourceLineNo">025</span>import org.apache.hadoop.conf.Configuration;<a name="line.25"></a>
-<span class="sourceLineNo">026</span>import org.apache.hadoop.conf.Configured;<a name="line.26"></a>
-<span class="sourceLineNo">027</span>import org.apache.hadoop.fs.FSDataInputStream;<a name="line.27"></a>
-<span class="sourceLineNo">028</span>import org.apache.hadoop.fs.FileStatus;<a name="line.28"></a>
-<span class="sourceLineNo">029</span>import org.apache.hadoop.fs.FileSystem;<a name="line.29"></a>
-<span class="sourceLineNo">030</span>import org.apache.hadoop.fs.Path;<a name="line.30"></a>
-<span class="sourceLineNo">031</span>import org.apache.hadoop.hbase.HBaseConfiguration;<a name="line.31"></a>
-<span class="sourceLineNo">032</span>import org.apache.hadoop.hbase.HBaseInterfaceAudience;<a name="line.32"></a>
-<span class="sourceLineNo">033</span>import org.apache.yetus.audience.InterfaceAudience;<a name="line.33"></a>
-<span class="sourceLineNo">034</span>import org.apache.yetus.audience.InterfaceStability;<a name="line.34"></a>
-<span class="sourceLineNo">035</span>import org.slf4j.Logger;<a name="line.35"></a>
-<span class="sourceLineNo">036</span>import org.slf4j.LoggerFactory;<a name="line.36"></a>
-<span class="sourceLineNo">037</span>import org.apache.hadoop.hbase.procedure2.Procedure;<a name="line.37"></a>
-<span class="sourceLineNo">038</span>import org.apache.hadoop.hbase.procedure2.ProcedureUtil;<a name="line.38"></a>
-<span class="sourceLineNo">039</span>import org.apache.hadoop.hbase.shaded.protobuf.generated.ProcedureProtos.ProcedureWALEntry;<a name="line.39"></a>
-<span class="sourceLineNo">040</span>import org.apache.hadoop.hbase.shaded.protobuf.generated.ProcedureProtos.ProcedureWALHeader;<a name="line.40"></a>
-<span class="sourceLineNo">041</span>import org.apache.hadoop.util.Tool;<a name="line.41"></a>
-<span class="sourceLineNo">042</span>import org.apache.hadoop.util.ToolRunner;<a name="line.42"></a>
-<span class="sourceLineNo">043</span><a name="line.43"></a>
-<span class="sourceLineNo">044</span>import org.apache.hbase.thirdparty.org.apache.commons.cli.CommandLine;<a name="line.44"></a>
-<span class="sourceLineNo">045</span>import org.apache.hbase.thirdparty.org.apache.commons.cli.HelpFormatter;<a name="line.45"></a>
-<span class="sourceLineNo">046</span>import org.apache.hbase.thirdparty.org.apache.commons.cli.Options;<a name="line.46"></a>
-<span class="sourceLineNo">047</span>import org.apache.hbase.thirdparty.org.apache.commons.cli.ParseException;<a name="line.47"></a>
-<span class="sourceLineNo">048</span>import org.apache.hbase.thirdparty.org.apache.commons.cli.PosixParser;<a name="line.48"></a>
+<span class="sourceLineNo">024</span>import org.apache.hadoop.conf.Configuration;<a name="line.24"></a>
+<span class="sourceLineNo">025</span>import org.apache.hadoop.conf.Configured;<a name="line.25"></a>
+<span class="sourceLineNo">026</span>import org.apache.hadoop.fs.FSDataInputStream;<a name="line.26"></a>
+<span class="sourceLineNo">027</span>import org.apache.hadoop.fs.FileStatus;<a name="line.27"></a>
+<span class="sourceLineNo">028</span>import org.apache.hadoop.fs.FileSystem;<a name="line.28"></a>
+<span class="sourceLineNo">029</span>import org.apache.hadoop.fs.Path;<a name="line.29"></a>
+<span class="sourceLineNo">030</span>import org.apache.hadoop.hbase.HBaseConfiguration;<a name="line.30"></a>
+<span class="sourceLineNo">031</span>import org.apache.hadoop.hbase.HBaseInterfaceAudience;<a name="line.31"></a>
+<span class="sourceLineNo">032</span>import org.apache.hadoop.hbase.procedure2.Procedure;<a name="line.32"></a>
+<span class="sourceLineNo">033</span>import org.apache.hadoop.hbase.procedure2.ProcedureUtil;<a name="line.33"></a>
+<span class="sourceLineNo">034</span>import org.apache.hadoop.util.Tool;<a name="line.34"></a>
+<span class="sourceLineNo">035</span>import org.apache.hadoop.util.ToolRunner;<a name="line.35"></a>
+<span class="sourceLineNo">036</span>import org.apache.yetus.audience.InterfaceAudience;<a name="line.36"></a>
+<span class="sourceLineNo">037</span>import org.apache.yetus.audience.InterfaceStability;<a name="line.37"></a>
+<span class="sourceLineNo">038</span>import org.slf4j.Logger;<a name="line.38"></a>
+<span class="sourceLineNo">039</span>import org.slf4j.LoggerFactory;<a name="line.39"></a>
+<span class="sourceLineNo">040</span><a name="line.40"></a>
+<span class="sourceLineNo">041</span>import org.apache.hbase.thirdparty.org.apache.commons.cli.CommandLine;<a name="line.41"></a>
+<span class="sourceLineNo">042</span>import org.apache.hbase.thirdparty.org.apache.commons.cli.DefaultParser;<a name="line.42"></a>
+<span class="sourceLineNo">043</span>import org.apache.hbase.thirdparty.org.apache.commons.cli.HelpFormatter;<a name="line.43"></a>
+<span class="sourceLineNo">044</span>import org.apache.hbase.thirdparty.org.apache.commons.cli.Options;<a name="line.44"></a>
+<span class="sourceLineNo">045</span>import org.apache.hbase.thirdparty.org.apache.commons.cli.ParseException;<a name="line.45"></a>
+<span class="sourceLineNo">046</span><a name="line.46"></a>
+<span class="sourceLineNo">047</span>import org.apache.hadoop.hbase.shaded.protobuf.generated.ProcedureProtos.ProcedureWALEntry;<a name="line.47"></a>
+<span class="sourceLineNo">048</span>import org.apache.hadoop.hbase.shaded.protobuf.generated.ProcedureProtos.ProcedureWALHeader;<a name="line.48"></a>
<span class="sourceLineNo">049</span><a name="line.49"></a>
<span class="sourceLineNo">050</span>/**<a name="line.50"></a>
<span class="sourceLineNo">051</span> * ProcedureWALPrettyPrinter prints the contents of a given ProcedureWAL file<a name="line.51"></a>
@@ -172,7 +172,7 @@
<span class="sourceLineNo">164</span><a name="line.164"></a>
<span class="sourceLineNo">165</span> final List<Path> files = new ArrayList<>();<a name="line.165"></a>
<span class="sourceLineNo">166</span> try {<a name="line.166"></a>
-<span class="sourceLineNo">167</span> CommandLine cmd = new PosixParser().parse(options, args);<a name="line.167"></a>
+<span class="sourceLineNo">167</span> CommandLine cmd = new DefaultParser().parse(options, args);<a name="line.167"></a>
<span class="sourceLineNo">168</span><a name="line.168"></a>
<span class="sourceLineNo">169</span> if (cmd.hasOption("f")) {<a name="line.169"></a>
<span class="sourceLineNo">170</span> files.add(new Path(cmd.getOptionValue("f")));<a name="line.170"></a>
http://git-wip-us.apache.org/repos/asf/hbase-site/blob/9b6ca5d1/devapidocs/src-html/org/apache/hadoop/hbase/procedure2/store/wal/WALProcedureMap.Entry.html
----------------------------------------------------------------------
diff --git a/devapidocs/src-html/org/apache/hadoop/hbase/procedure2/store/wal/WALProcedureMap.Entry.html b/devapidocs/src-html/org/apache/hadoop/hbase/procedure2/store/wal/WALProcedureMap.Entry.html
new file mode 100644
index 0000000..a281f12
--- /dev/null
+++ b/devapidocs/src-html/org/apache/hadoop/hbase/procedure2/store/wal/WALProcedureMap.Entry.html
@@ -0,0 +1,679 @@
+<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
+<html lang="en">
+<head>
+<title>Source code</title>
+<link rel="stylesheet" type="text/css" href="../../../../../../../../stylesheet.css" title="Style">
+</head>
+<body>
+<div class="sourceContainer">
+<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.procedure2.store.wal;<a name="line.18"></a>
+<span class="sourceLineNo">019</span><a name="line.19"></a>
+<span class="sourceLineNo">020</span>import java.io.IOException;<a name="line.20"></a>
+<span class="sourceLineNo">021</span>import org.apache.hadoop.hbase.procedure2.Procedure;<a name="line.21"></a>
+<span class="sourceLineNo">022</span>import org.apache.hadoop.hbase.procedure2.ProcedureUtil;<a name="line.22"></a>
+<span class="sourceLineNo">023</span>import org.apache.hadoop.hbase.procedure2.store.ProcedureStore.ProcedureIterator;<a name="line.23"></a>
+<span class="sourceLineNo">024</span>import org.slf4j.Logger;<a name="line.24"></a>
+<span class="sourceLineNo">025</span>import org.slf4j.LoggerFactory;<a name="line.25"></a>
+<span class="sourceLineNo">026</span><a name="line.26"></a>
+<span class="sourceLineNo">027</span>import org.apache.hadoop.hbase.shaded.protobuf.generated.ProcedureProtos;<a name="line.27"></a>
+<span class="sourceLineNo">028</span><a name="line.28"></a>
+<span class="sourceLineNo">029</span>/**<a name="line.29"></a>
+<span class="sourceLineNo">030</span> * We keep an in-memory map of the procedures sorted by replay order. (see the details in the<a name="line.30"></a>
+<span class="sourceLineNo">031</span> * beginning of {@link ProcedureWALFormatReader}).<a name="line.31"></a>
+<span class="sourceLineNo">032</span> *<a name="line.32"></a>
+<span class="sourceLineNo">033</span> * <pre><a name="line.33"></a>
+<span class="sourceLineNo">034</span> * procedureMap = | A | | E | | C | | | | | G | | |<a name="line.34"></a>
+<span class="sourceLineNo">035</span> * D B<a name="line.35"></a>
+<span class="sourceLineNo">036</span> * replayOrderHead = C <-> B <-> E <-> D <-> A <-> G<a name="line.36"></a>
+<span class="sourceLineNo">037</span> *<a name="line.37"></a>
+<span class="sourceLineNo">038</span> * We also have a lazy grouping by "root procedure", and a list of<a name="line.38"></a>
+<span class="sourceLineNo">039</span> * unlinked procedures. If after reading all the WALs we have unlinked<a name="line.39"></a>
+<span class="sourceLineNo">040</span> * procedures it means that we had a missing WAL or a corruption.<a name="line.40"></a>
+<span class="sourceLineNo">041</span> * rootHead = A <-> D <-> G<a name="line.41"></a>
+<span class="sourceLineNo">042</span> * B E<a name="line.42"></a>
+<span class="sourceLineNo">043</span> * C<a name="line.43"></a>
+<span class="sourceLineNo">044</span> * unlinkFromLinkList = None<a name="line.44"></a>
+<span class="sourceLineNo">045</span> * </pre><a name="line.45"></a>
+<span class="sourceLineNo">046</span> */<a name="line.46"></a>
+<span class="sourceLineNo">047</span>class WALProcedureMap {<a name="line.47"></a>
+<span class="sourceLineNo">048</span><a name="line.48"></a>
+<span class="sourceLineNo">049</span> private static final Logger LOG = LoggerFactory.getLogger(WALProcedureMap.class);<a name="line.49"></a>
+<span class="sourceLineNo">050</span><a name="line.50"></a>
+<span class="sourceLineNo">051</span> private static class Entry {<a name="line.51"></a>
+<span class="sourceLineNo">052</span> // For bucketed linked lists in hash-table.<a name="line.52"></a>
+<span class="sourceLineNo">053</span> private Entry hashNext;<a name="line.53"></a>
+<span class="sourceLineNo">054</span> // child head<a name="line.54"></a>
+<span class="sourceLineNo">055</span> private Entry childHead;<a name="line.55"></a>
+<span class="sourceLineNo">056</span> // double-link for rootHead or childHead<a name="line.56"></a>
+<span class="sourceLineNo">057</span> private Entry linkNext;<a name="line.57"></a>
+<span class="sourceLineNo">058</span> private Entry linkPrev;<a name="line.58"></a>
+<span class="sourceLineNo">059</span> // replay double-linked-list<a name="line.59"></a>
+<span class="sourceLineNo">060</span> private Entry replayNext;<a name="line.60"></a>
+<span class="sourceLineNo">061</span> private Entry replayPrev;<a name="line.61"></a>
+<span class="sourceLineNo">062</span> // procedure-infos<a name="line.62"></a>
+<span class="sourceLineNo">063</span> private Procedure<?> procedure;<a name="line.63"></a>
+<span class="sourceLineNo">064</span> private ProcedureProtos.Procedure proto;<a name="line.64"></a>
+<span class="sourceLineNo">065</span> private boolean ready = false;<a name="line.65"></a>
+<span class="sourceLineNo">066</span><a name="line.66"></a>
+<span class="sourceLineNo">067</span> public Entry(Entry hashNext) {<a name="line.67"></a>
+<span class="sourceLineNo">068</span> this.hashNext = hashNext;<a name="line.68"></a>
+<span class="sourceLineNo">069</span> }<a name="line.69"></a>
+<span class="sourceLineNo">070</span><a name="line.70"></a>
+<span class="sourceLineNo">071</span> public long getProcId() {<a name="line.71"></a>
+<span class="sourceLineNo">072</span> return proto.getProcId();<a name="line.72"></a>
+<span class="sourceLineNo">073</span> }<a name="line.73"></a>
+<span class="sourceLineNo">074</span><a name="line.74"></a>
+<span class="sourceLineNo">075</span> public long getParentId() {<a name="line.75"></a>
+<span class="sourceLineNo">076</span> return proto.getParentId();<a name="line.76"></a>
+<span class="sourceLineNo">077</span> }<a name="line.77"></a>
+<span class="sourceLineNo">078</span><a name="line.78"></a>
+<span class="sourceLineNo">079</span> public boolean hasParent() {<a name="line.79"></a>
+<span class="sourceLineNo">080</span> return proto.hasParentId();<a name="line.80"></a>
+<span class="sourceLineNo">081</span> }<a name="line.81"></a>
+<span class="sourceLineNo">082</span><a name="line.82"></a>
+<span class="sourceLineNo">083</span> public boolean isReady() {<a name="line.83"></a>
+<span class="sourceLineNo">084</span> return ready;<a name="line.84"></a>
+<span class="sourceLineNo">085</span> }<a name="line.85"></a>
+<span class="sourceLineNo">086</span><a name="line.86"></a>
+<span class="sourceLineNo">087</span> public boolean isFinished() {<a name="line.87"></a>
+<span class="sourceLineNo">088</span> if (!hasParent()) {<a name="line.88"></a>
+<span class="sourceLineNo">089</span> // we only consider 'root' procedures. because for the user 'finished'<a name="line.89"></a>
+<span class="sourceLineNo">090</span> // means when everything up to the 'root' is finished.<a name="line.90"></a>
+<span class="sourceLineNo">091</span> switch (proto.getState()) {<a name="line.91"></a>
+<span class="sourceLineNo">092</span> case ROLLEDBACK:<a name="line.92"></a>
+<span class="sourceLineNo">093</span> case SUCCESS:<a name="line.93"></a>
+<span class="sourceLineNo">094</span> return true;<a name="line.94"></a>
+<span class="sourceLineNo">095</span> default:<a name="line.95"></a>
+<span class="sourceLineNo">096</span> break;<a name="line.96"></a>
+<span class="sourceLineNo">097</span> }<a name="line.97"></a>
+<span class="sourceLineNo">098</span> }<a name="line.98"></a>
+<span class="sourceLineNo">099</span> return false;<a name="line.99"></a>
+<span class="sourceLineNo">100</span> }<a name="line.100"></a>
+<span class="sourceLineNo">101</span><a name="line.101"></a>
+<span class="sourceLineNo">102</span> public Procedure<?> convert() throws IOException {<a name="line.102"></a>
+<span class="sourceLineNo">103</span> if (procedure == null) {<a name="line.103"></a>
+<span class="sourceLineNo">104</span> procedure = ProcedureUtil.convertToProcedure(proto);<a name="line.104"></a>
+<span class="sourceLineNo">105</span> }<a name="line.105"></a>
+<span class="sourceLineNo">106</span> return procedure;<a name="line.106"></a>
+<span class="sourceLineNo">107</span> }<a name="line.107"></a>
+<span class="sourceLineNo">108</span><a name="line.108"></a>
+<span class="sourceLineNo">109</span> @Override<a name="line.109"></a>
+<span class="sourceLineNo">110</span> public String toString() {<a name="line.110"></a>
+<span class="sourceLineNo">111</span> final StringBuilder sb = new StringBuilder();<a name="line.111"></a>
+<span class="sourceLineNo">112</span> sb.append("Entry(");<a name="line.112"></a>
+<span class="sourceLineNo">113</span> sb.append(getProcId());<a name="line.113"></a>
+<span class="sourceLineNo">114</span> sb.append(", parentId=");<a name="line.114"></a>
+<span class="sourceLineNo">115</span> sb.append(getParentId());<a name="line.115"></a>
+<span class="sourceLineNo">116</span> sb.append(", class=");<a name="line.116"></a>
+<span class="sourceLineNo">117</span> sb.append(proto.getClassName());<a name="line.117"></a>
+<span class="sourceLineNo">118</span> sb.append(")");<a name="line.118"></a>
+<span class="sourceLineNo">119</span> return sb.toString();<a name="line.119"></a>
+<span class="sourceLineNo">120</span> }<a name="line.120"></a>
+<span class="sourceLineNo">121</span> }<a name="line.121"></a>
+<span class="sourceLineNo">122</span><a name="line.122"></a>
+<span class="sourceLineNo">123</span> private static class EntryIterator implements ProcedureIterator {<a name="line.123"></a>
+<span class="sourceLineNo">124</span> private final Entry replayHead;<a name="line.124"></a>
+<span class="sourceLineNo">125</span> private Entry current;<a name="line.125"></a>
+<span class="sourceLineNo">126</span><a name="line.126"></a>
+<span class="sourceLineNo">127</span> public EntryIterator(Entry replayHead) {<a name="line.127"></a>
+<span class="sourceLineNo">128</span> this.replayHead = replayHead;<a name="line.128"></a>
+<span class="sourceLineNo">129</span> this.current = replayHead;<a name="line.129"></a>
+<span class="sourceLineNo">130</span> }<a name="line.130"></a>
+<span class="sourceLineNo">131</span><a name="line.131"></a>
+<span class="sourceLineNo">132</span> @Override<a name="line.132"></a>
+<span class="sourceLineNo">133</span> public void reset() {<a name="line.133"></a>
+<span class="sourceLineNo">134</span> this.current = replayHead;<a name="line.134"></a>
+<span class="sourceLineNo">135</span> }<a name="line.135"></a>
+<span class="sourceLineNo">136</span><a name="line.136"></a>
+<span class="sourceLineNo">137</span> @Override<a name="line.137"></a>
+<span class="sourceLineNo">138</span> public boolean hasNext() {<a name="line.138"></a>
+<span class="sourceLineNo">139</span> return current != null;<a name="line.139"></a>
+<span class="sourceLineNo">140</span> }<a name="line.140"></a>
+<span class="sourceLineNo">141</span><a name="line.141"></a>
+<span class="sourceLineNo">142</span> @Override<a name="line.142"></a>
+<span class="sourceLineNo">143</span> public boolean isNextFinished() {<a name="line.143"></a>
+<span class="sourceLineNo">144</span> return current != null && current.isFinished();<a name="line.144"></a>
+<span class="sourceLineNo">145</span> }<a name="line.145"></a>
+<span class="sourceLineNo">146</span><a name="line.146"></a>
+<span class="sourceLineNo">147</span> @Override<a name="line.147"></a>
+<span class="sourceLineNo">148</span> public void skipNext() {<a name="line.148"></a>
+<span class="sourceLineNo">149</span> current = current.replayNext;<a name="line.149"></a>
+<span class="sourceLineNo">150</span> }<a name="line.150"></a>
+<span class="sourceLineNo">151</span><a name="line.151"></a>
+<span class="sourceLineNo">152</span> @Override<a name="line.152"></a>
+<span class="sourceLineNo">153</span> public Procedure<?> next() throws IOException {<a name="line.153"></a>
+<span class="sourceLineNo">154</span> try {<a name="line.154"></a>
+<span class="sourceLineNo">155</span> return current.convert();<a name="line.155"></a>
+<span class="sourceLineNo">156</span> } finally {<a name="line.156"></a>
+<span class="sourceLineNo">157</span> current = current.replayNext;<a name="line.157"></a>
+<span class="sourceLineNo">158</span> }<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><a name="line.161"></a>
+<span class="sourceLineNo">162</span> // procedure hash table<a name="line.162"></a>
+<span class="sourceLineNo">163</span> private Entry[] procedureMap;<a name="line.163"></a>
+<span class="sourceLineNo">164</span><a name="line.164"></a>
+<span class="sourceLineNo">165</span> // replay-order double-linked-list<a name="line.165"></a>
+<span class="sourceLineNo">166</span> private Entry replayOrderHead;<a name="line.166"></a>
+<span class="sourceLineNo">167</span> private Entry replayOrderTail;<a name="line.167"></a>
+<span class="sourceLineNo">168</span><a name="line.168"></a>
+<span class="sourceLineNo">169</span> // root linked-list<a name="line.169"></a>
+<span class="sourceLineNo">170</span> private Entry rootHead;<a name="line.170"></a>
+<span class="sourceLineNo">171</span><a name="line.171"></a>
+<span class="sourceLineNo">172</span> // pending unlinked children (root not present yet)<a name="line.172"></a>
+<span class="sourceLineNo">173</span> private Entry childUnlinkedHead;<a name="line.173"></a>
+<span class="sourceLineNo">174</span><a name="line.174"></a>
+<span class="sourceLineNo">175</span> // Track ProcId range<a name="line.175"></a>
+<span class="sourceLineNo">176</span> private long minModifiedProcId = Long.MAX_VALUE;<a name="line.176"></a>
+<span class="sourceLineNo">177</span> private long maxModifiedProcId = Long.MIN_VALUE;<a name="line.177"></a>
+<span class="sourceLineNo">178</span><a name="line.178"></a>
+<span class="sourceLineNo">179</span> public WALProcedureMap(int size) {<a name="line.179"></a>
+<span class="sourceLineNo">180</span> procedureMap = new Entry[size];<a name="line.180"></a>
+<span class="sourceLineNo">181</span> replayOrderHead = null;<a name="line.181"></a>
+<span class="sourceLineNo">182</span> replayOrderTail = null;<a name="line.182"></a>
+<span class="sourceLineNo">183</span> rootHead = null;<a name="line.183"></a>
+<span class="sourceLineNo">184</span> childUnlinkedHead = null;<a name="line.184"></a>
+<span class="sourceLineNo">185</span> }<a name="line.185"></a>
+<span class="sourceLineNo">186</span><a name="line.186"></a>
+<span class="sourceLineNo">187</span> public void add(ProcedureProtos.Procedure procProto) {<a name="line.187"></a>
+<span class="sourceLineNo">188</span> trackProcIds(procProto.getProcId());<a name="line.188"></a>
+<span class="sourceLineNo">189</span> Entry entry = addToMap(procProto.getProcId(), procProto.hasParentId());<a name="line.189"></a>
+<span class="sourceLineNo">190</span> boolean newEntry = entry.proto == null;<a name="line.190"></a>
+<span class="sourceLineNo">191</span> // We have seen procedure WALs where the entries are out of order; see HBASE-18152.<a name="line.191"></a>
+<span class="sourceLineNo">192</span> // To compensate, only replace the Entry procedure if for sure this new procedure<a name="line.192"></a>
+<span class="sourceLineNo">193</span> // is indeed an entry that came later.<a name="line.193"></a>
+<span class="sourceLineNo">194</span> // TODO: Fix the writing of procedure info so it does not violate basic expectation, that WALs<a name="line.194"></a>
+<span class="sourceLineNo">195</span> // contain procedure changes goingfrom start to finish in sequence.<a name="line.195"></a>
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+<span class="sourceLineNo">198</span> }<a name="line.198"></a>
+<span class="sourceLineNo">199</span> addToReplayList(entry);<a name="line.199"></a>
+<span class="sourceLineNo">200</span> if (newEntry) {<a name="line.200"></a>
+<span class="sourceLineNo">201</span> if (procProto.hasParentId()) {<a name="line.201"></a>
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+<span class="sourceLineNo">203</span> } else {<a name="line.203"></a>
+<span class="sourceLineNo">204</span> rootHead = addToLinkList(entry, rootHead);<a name="line.204"></a>
+<span class="sourceLineNo">205</span> }<a name="line.205"></a>
+<span class="sourceLineNo">206</span> }<a name="line.206"></a>
+<span class="sourceLineNo">207</span> }<a name="line.207"></a>
+<span class="sourceLineNo">208</span><a name="line.208"></a>
+<span class="sourceLineNo">209</span> /**<a name="line.209"></a>
+<span class="sourceLineNo">210</span> * @return True if this new procedure is 'richer' than the current one else false and we log this<a name="line.210"></a>
+<span class="sourceLineNo">211</span> * incidence where it appears that the WAL has older entries appended after newer ones.<a name="line.211"></a>
+<span class="sourceLineNo">212</span> * See HBASE-18152.<a name="line.212"></a>
+<span class="sourceLineNo">213</span> */<a name="line.213"></a>
+<span class="sourceLineNo">214</span> private static boolean isIncreasing(ProcedureProtos.Procedure current,<a name="line.214"></a>
+<span class="sourceLineNo">215</span> ProcedureProtos.Procedure candidate) {<a name="line.215"></a>
+<span class="sourceLineNo">216</span> // Check that the procedures we see are 'increasing'. We used to compare<a name="line.216"></a>
+<span class="sourceLineNo">217</span> // procedure id first and then update time but it can legitimately go backwards if the<a name="line.217"></a>
+<span class="sourceLineNo">218</span> // procedure is failed or rolled back so that was unreliable. Was going to compare<a name="line.218"></a>
+<span class="sourceLineNo">219</span> // state but lets see if comparing update time enough (unfortunately this issue only<a name="line.219"></a>
+<span class="sourceLineNo">220</span> // seen under load...)<a name="line.220"></a>
+<span class="sourceLineNo">221</span> boolean increasing = current.getLastUpdate() <= candidate.getLastUpdate();<a name="line.221"></a>
+<span class="sourceLineNo">222</span> if (!increasing) {<a name="line.222"></a>
+<span class="sourceLineNo">223</span> LOG.warn("NOT INCREASING! current=" + current + ", candidate=" + candidate);<a name="line.223"></a>
+<span class="sourceLineNo">224</span> }<a name="line.224"></a>
+<span class="sourceLineNo">225</span> return increasing;<a name="line.225"></a>
+<span class="sourceLineNo">226</span> }<a name="line.226"></a>
+<span class="sourceLineNo">227</span><a name="line.227"></a>
+<span class="sourceLineNo">228</span> public boolean remove(long procId) {<a name="line.228"></a>
+<span class="sourceLineNo">229</span> trackProcIds(procId);<a name="line.229"></a>
+<span class="sourceLineNo">230</span> Entry entry = removeFromMap(procId);<a name="line.230"></a>
+<span class="sourceLineNo">231</span> if (entry != null) {<a name="line.231"></a>
+<span class="sourceLineNo">232</span> unlinkFromReplayList(entry);<a name="line.232"></a>
+<span class="sourceLineNo">233</span> unlinkFromLinkList(entry);<a name="line.233"></a>
+<span class="sourceLineNo">234</span> return true;<a name="line.234"></a>
+<span class="sourceLineNo">235</span> }<a name="line.235"></a>
+<span class="sourceLineNo">236</span> return false;<a name="line.236"></a>
+<span class="sourceLineNo">237</span> }<a name="line.237"></a>
+<span class="sourceLineNo">238</span><a name="line.238"></a>
+<span class="sourceLineNo">239</span> private void trackProcIds(long procId) {<a name="line.239"></a>
+<span class="sourceLineNo">240</span> minModifiedProcId = Math.min(minModifiedProcId, procId);<a name="line.240"></a>
+<span class="sourceLineNo">241</span> maxModifiedProcId = Math.max(maxModifiedProcId, procId);<a name="line.241"></a>
+<span class="sourceLineNo">242</span> }<a name="line.242"></a>
+<span class="sourceLineNo">243</span><a name="line.243"></a>
+<span class="sourceLineNo">244</span> public long getMinModifiedProcId() {<a name="line.244"></a>
+<span class="sourceLineNo">245</span> return minModifiedProcId;<a name="line.245"></a>
+<span class="sourceLineNo">246</span> }<a name="line.246"></a>
+<span class="sourceLineNo">247</span><a name="line.247"></a>
+<span class="sourceLineNo">248</span> public long getMaxModifiedProcId() {<a name="line.248"></a>
+<span class="sourceLineNo">249</span> return maxModifiedProcId;<a name="line.249"></a>
+<span class="sourceLineNo">250</span> }<a name="line.250"></a>
+<span class="sourceLineNo">251</span><a name="line.251"></a>
+<span class="sourceLineNo">252</span> public boolean contains(long procId) {<a name="line.252"></a>
+<span class="sourceLineNo">253</span> return getProcedure(procId) != null;<a name="line.253"></a>
+<span class="sourceLineNo">254</span> }<a name="line.254"></a>
+<span class="sourceLineNo">255</span><a name="line.255"></a>
+<span class="sourceLineNo">256</span> public boolean isEmpty() {<a name="line.256"></a>
+<span class="sourceLineNo">257</span> return replayOrderHead == null;<a name="line.257"></a>
+<span class="sourceLineNo">258</span> }<a name="line.258"></a>
+<span class="sourceLineNo">259</span><a name="line.259"></a>
+<span class="sourceLineNo">260</span> public void clear() {<a name="line.260"></a>
+<span class="sourceLineNo">261</span> for (int i = 0; i < procedureMap.length; ++i) {<a name="line.261"></a>
+<span class="sourceLineNo">262</span> procedureMap[i] = null;<a name="line.262"></a>
+<span class="sourceLineNo">263</span> }<a name="line.263"></a>
+<span class="sourceLineNo">264</span> replayOrderHead = null;<a name="line.264"></a>
+<span class="sourceLineNo">265</span> replayOrderTail = null;<a name="line.265"></a>
+<span class="sourceLineNo">266</span> rootHead = null;<a name="line.266"></a>
+<span class="sourceLineNo">267</span> childUnlinkedHead = null;<a name="line.267"></a>
+<span class="sourceLineNo">268</span> minModifiedProcId = Long.MAX_VALUE;<a name="line.268"></a>
+<span class="sourceLineNo">269</span> maxModifiedProcId = Long.MIN_VALUE;<a name="line.269"></a>
+<span class="sourceLineNo">270</span> }<a name="line.270"></a>
+<span class="sourceLineNo">271</span><a name="line.271"></a>
+<span class="sourceLineNo">272</span> /*<a name="line.272"></a>
+<span class="sourceLineNo">273</span> * Merges two WalProcedureMap, the target is the "global" map, the source is the "local" map. -<a name="line.273"></a>
+<span class="sourceLineNo">274</span> * The entries in the hashtables are guaranteed to be unique. On replay we don't load procedures<a name="line.274"></a>
+<span class="sourceLineNo">275</span> * that already exist in the "global" map (the one we are merging the "local" in to). - The<a name="line.275"></a>
+<span class="sourceLineNo">276</span> * replayOrderList of the "local" nao will be appended to the "global" map replay list. - The<a name="line.276"></a>
+<span class="sourceLineNo">277</span> * "local" map will be cleared at the end of the operation.<a name="line.277"></a>
+<span class="sourceLineNo">278</span> */<a name="line.278"></a>
+<span class="sourceLineNo">279</span> public void mergeTail(WALProcedureMap other) {<a name="line.279"></a>
+<span class="sourceLineNo">280</span> for (Entry p = other.replayOrderHead; p != null; p = p.replayNext) {<a name="line.280"></a>
+<span class="sourceLineNo">281</span> int slotIndex = getMapSlot(p.getProcId());<a name="line.281"></a>
+<span class="sourceLineNo">282</span> p.hashNext = procedureMap[slotIndex];<a name="line.282"></a>
+<span class="sourceLineNo">283</span> procedureMap[slotIndex] = p;<a name="line.283"></a>
+<span class="sourceLineNo">284</span> }<a name="line.284"></a>
+<span class="sourceLineNo">285</span><a name="line.285"></a>
+<span class="sourceLineNo">286</span> if (replayOrderHead == null) {<a name="line.286"></a>
+<span class="sourceLineNo">287</span> replayOrderHead = other.replayOrderHead;<a name="line.287"></a>
+<span class="sourceLineNo">288</span> replayOrderTail = other.replayOrderTail;<a name="line.288"></a>
+<span class="sourceLineNo">289</span> rootHead = other.rootHead;<a name="line.289"></a>
+<span class="sourceLineNo">290</span> childUnlinkedHead = other.childUnlinkedHead;<a name="line.290"></a>
+<span class="sourceLineNo">291</span> } else {<a name="line.291"></a>
+<span class="sourceLineNo">292</span> // append replay list<a name="line.292"></a>
+<span class="sourceLineNo">293</span> assert replayOrderTail.replayNext == null;<a name="line.293"></a>
+<span class="sourceLineNo">294</span> assert other.replayOrderHead.replayPrev == null;<a name="line.294"></a>
+<span class="sourceLineNo">295</span> replayOrderTail.replayNext = other.replayOrderHead;<a name="line.295"></a>
+<span class="sourceLineNo">296</span> other.replayOrderHead.replayPrev = replayOrderTail;<a name="line.296"></a>
+<span class="sourceLineNo">297</span> replayOrderTail = other.replayOrderTail;<a name="line.297"></a>
+<span class="sourceLineNo">298</span><a name="line.298"></a>
+<span class="sourceLineNo">299</span> // merge rootHead<a name="line.299"></a>
+<span class="sourceLineNo">300</span> if (rootHead == null) {<a name="line.300"></a>
+<span class="sourceLineNo">301</span> rootHead = other.rootHead;<a name="line.301"></a>
+<span class="sourceLineNo">302</span> } else if (other.rootHead != null) {<a name="line.302"></a>
+<span class="sourceLineNo">303</span> Entry otherTail = findLinkListTail(other.rootHead);<a name="line.303"></a>
+<span class="sourceLineNo">304</span> otherTail.linkNext = rootHead;<a name="line.304"></a>
+<span class="sourceLineNo">305</span> rootHead.linkPrev = otherTail;<a name="line.305"></a>
+<span class="sourceLineNo">306</span> rootHead = other.rootHead;<a name="line.306"></a>
+<span class="sourceLineNo">307</span> }<a name="line.307"></a>
+<span class="sourceLineNo">308</span><a name="line.308"></a>
+<span class="sourceLineNo">309</span> // merge childUnlinkedHead<a name="line.309"></a>
+<span class="sourceLineNo">310</span> if (childUnlinkedHead == null) {<a name="line.310"></a>
+<span class="sourceLineNo">311</span> childUnlinkedHead = other.childUnlinkedHead;<a name="line.311"></a>
+<span class="sourceLineNo">312</span> } else if (other.childUnlinkedHead != null) {<a name="line.312"></a>
+<span class="sourceLineNo">313</span> Entry otherTail = findLinkListTail(other.childUnlinkedHead);<a name="line.313"></a>
+<span class="sourceLineNo">314</span> otherTail.linkNext = childUnlinkedHead;<a name="line.314"></a>
+<span class="sourceLineNo">315</span> childUnlinkedHead.linkPrev = otherTail;<a name="line.315"></a>
+<span class="sourceLineNo">316</span> childUnlinkedHead = other.childUnlinkedHead;<a name="line.316"></a>
+<span class="sourceLineNo">317</span> }<a name="line.317"></a>
+<span class="sourceLineNo">318</span> }<a name="line.318"></a>
+<span class="sourceLineNo">319</span> maxModifiedProcId = Math.max(maxModifiedProcId, other.maxModifiedProcId);<a name="line.319"></a>
+<span class="sourceLineNo">320</span> minModifiedProcId = Math.max(minModifiedProcId, other.minModifiedProcId);<a name="line.320"></a>
+<span class="sourceLineNo">321</span><a name="line.321"></a>
+<span class="sourceLineNo">322</span> other.clear();<a name="line.322"></a>
+<span class="sourceLineNo">323</span> }<a name="line.323"></a>
+<span class="sourceLineNo">324</span><a name="line.324"></a>
+<span class="sourceLineNo">325</span> /**<a name="line.325"></a>
+<span class="sourceLineNo">326</span> * Returns an EntryIterator with the list of procedures ready to be added to the executor. A<a name="line.326"></a>
+<span class="sourceLineNo">327</span> * Procedure is ready if its children and parent are ready.<a name="line.327"></a>
+<span class="sourceLineNo">328</span> */<a name="line.328"></a>
+<span class="sourceLineNo">329</span> public ProcedureIterator fetchReady() {<a name="line.329"></a>
+<span class="sourceLineNo">330</span> buildGraph();<a name="line.330"></a>
+<span class="sourceLineNo">331</span><a name="line.331"></a>
+<span class="sourceLineNo">332</span> Entry readyHead = null;<a name="line.332"></a>
+<span class="sourceLineNo">333</span> Entry readyTail = null;<a name="line.333"></a>
+<span class="sourceLineNo">334</span> Entry p = replayOrderHead;<a name="line.334"></a>
+<span class="sourceLineNo">335</span> while (p != null) {<a name="line.335"></a>
+<span class="sourceLineNo">336</span> Entry next = p.replayNext;<a name="line.336"></a>
+<span class="sourceLineNo">337</span> if (p.isReady()) {<a name="line.337"></a>
+<span class="sourceLineNo">338</span> unlinkFromReplayList(p);<a name="line.338"></a>
+<span class="sourceLineNo">339</span> if (readyTail != null) {<a name="line.339"></a>
+<span class="sourceLineNo">340</span> readyTail.replayNext = p;<a name="line.340"></a>
+<span class="sourceLineNo">341</span> p.replayPrev = readyTail;<a name="line.341"></a>
+<span class="sourceLineNo">342</span> } else {<a name="line.342"></a>
+<span class="sourceLineNo">343</span> p.replayPrev = null;<a name="line.343"></a>
+<span class="sourceLineNo">344</span> readyHead = p;<a name="line.344"></a>
+<span class="sourceLineNo">345</span> }<a name="line.345"></a>
+<span class="sourceLineNo">346</span> readyTail = p;<a name="line.346"></a>
+<span class="sourceLineNo">347</span> p.replayNext = null;<a name="line.347"></a>
+<span class="sourceLineNo">348</span> }<a name="line.348"></a>
+<span class="sourceLineNo">349</span> p = next;<a name="line.349"></a>
+<span class="sourceLineNo">350</span> }<a name="line.350"></a>
+<span class="sourceLineNo">351</span> // we need the hash-table lookups for parents, so this must be done<a name="line.351"></a>
+<span class="sourceLineNo">352</span> // out of the loop where we check isReadyToRun()<a name="line.352"></a>
+<span class="sourceLineNo">353</span> for (p = readyHead; p != null; p = p.replayNext) {<a name="line.353"></a>
+<span class="sourceLineNo">354</span> removeFromMap(p.getProcId());<a name="line.354"></a>
+<span class="sourceLineNo">355</span> unlinkFromLinkList(p);<a name="line.355"></a>
+<span class="sourceLineNo">356</span> }<a name="line.356"></a>
+<span class="sourceLineNo">357</span> return readyHead != null ? new EntryIterator(readyHead) : null;<a name="line.357"></a>
+<span class="sourceLineNo">358</span> }<a name="line.358"></a>
+<span class="sourceLineNo">359</span><a name="line.359"></a>
+<span class="sourceLineNo">360</span> /**<a name="line.360"></a>
+<span class="sourceLineNo">361</span> * Drain this map and return all procedures in it.<a name="line.361"></a>
+<span class="sourceLineNo">362</span> */<a name="line.362"></a>
+<span class="sourceLineNo">363</span> public ProcedureIterator fetchAll() {<a name="line.363"></a>
+<span class="sourceLineNo">364</span> Entry head = replayOrderHead;<a name="line.364"></a>
+<span class="sourceLineNo">365</span> for (Entry p = head; p != null; p = p.replayNext) {<a name="line.365"></a>
+<span class="sourceLineNo">366</span> removeFromMap(p.getProcId());<a name="line.366"></a>
+<span class="sourceLineNo">367</span> }<a name="line.367"></a>
+<span class="sourceLineNo">368</span> for (int i = 0; i < procedureMap.length; ++i) {<a name="line.368"></a>
+<span class="sourceLineNo">369</span> assert procedureMap[i] == null : "map not empty i=" + i;<a name="line.369"></a>
+<span class="sourceLineNo">370</span> }<a name="line.370"></a>
+<span class="sourceLineNo">371</span> replayOrderHead = null;<a name="line.371"></a>
+<span class="sourceLineNo">372</span> replayOrderTail = null;<a name="line.372"></a>
+<span class="sourceLineNo">373</span> childUnlinkedHead = null;<a name="line.373"></a>
+<span class="sourceLineNo">374</span> rootHead = null;<a name="line.374"></a>
+<span class="sourceLineNo">375</span> return head != null ? new EntryIterator(head) : null;<a name="line.375"></a>
+<span class="sourceLineNo">376</span> }<a name="line.376"></a>
+<span class="sourceLineNo">377</span><a name="line.377"></a>
+<span class="sourceLineNo">378</span> private void buildGraph() {<a name="line.378"></a>
+<span class="sourceLineNo">379</span> Entry p = childUnlinkedHead;<a name="line.379"></a>
+<span class="sourceLineNo">380</span> while (p != null) {<a name="line.380"></a>
+<span class="sourceLineNo">381</span> Entry next = p.linkNext;<a name="line.381"></a>
+<span class="sourceLineNo">382</span> Entry rootProc = getRootProcedure(p);<a name="line.382"></a>
+<span class="sourceLineNo">383</span> if (rootProc != null) {<a name="line.383"></a>
+<span class="sourceLineNo">384</span> rootProc.childHead = addToLinkList(p, rootProc.childHead);<a name="line.384"></a>
+<span class="sourceLineNo">385</span> }<a name="line.385"></a>
+<span class="sourceLineNo">386</span> p = next;<a name="line.386"></a>
+<span class="sourceLineNo">387</span> }<a name="line.387"></a>
+<span class="sourceLineNo">388</span><a name="line.388"></a>
+<span class="sourceLineNo">389</span> for (p = rootHead; p != null; p = p.linkNext) {<a name="line.389"></a>
+<span class="sourceLineNo">390</span> checkReadyToRun(p);<a name="line.390"></a>
+<span class="sourceLineNo">391</span> }<a name="line.391"></a>
+<span class="sourceLineNo">392</span> }<a name="line.392"></a>
+<span class="sourceLineNo">393</span><a name="line.393"></a>
+<span class="sourceLineNo">394</span> private Entry getRootProcedure(Entry entry) {<a name="line.394"></a>
+<span class="sourceLineNo">395</span> while (entry != null && entry.hasParent()) {<a name="line.395"></a>
+<span class="sourceLineNo">396</span> entry = getProcedure(entry.getParentId());<a name="line.396"></a>
+<span class="sourceLineNo">397</span> }<a name="line.397"></a>
+<span class="sourceLineNo">398</span> return entry;<a name="line.398"></a>
+<span class="sourceLineNo">399</span> }<a name="line.399"></a>
+<span class="sourceLineNo">400</span><a name="line.400"></a>
+<span class="sourceLineNo">401</span> /**<a name="line.401"></a>
+<span class="sourceLineNo">402</span> * (see the comprehensive explanation in the beginning of {@link ProcedureWALFormatReader}). A<a name="line.402"></a>
+<span class="sourceLineNo">403</span> * Procedure is ready when parent and children are ready. "ready" means that we all the<a name="line.403"></a>
+<span class="sourceLineNo">404</span> * information that we need in-memory.<a name="line.404"></a>
+<span class="sourceLineNo">405</span> * <p/><a name="line.405"></a>
+<span class="sourceLineNo">406</span> * Example-1:<br/><a name="line.406"></a>
+<span class="sourceLineNo">407</span> * We have two WALs, we start reading from the newest (wal-2)<a name="line.407"></a>
+<span class="sourceLineNo">408</span> *<a name="line.408"></a>
+<span class="sourceLineNo">409</span> * <pre><a name="line.409"></a>
+<span class="sourceLineNo">410</span> * wal-2 | C B |<a name="line.410"></a>
+<span class="sourceLineNo">411</span> * wal-1 | A B C |<a name="line.411"></a>
+<span class="sourceLineNo">412</span> * </pre><a name="line.412"></a>
+<span class="sourceLineNo">413</span> *<a name="line.413"></a>
+<span class="sourceLineNo">414</span> * If C and B don't depend on A (A is not the parent), we can start them before reading wal-1. If<a name="line.414"></a>
+<span class="sourceLineNo">415</span> * B is the only one with parent A we can start C. We have to read one more WAL before being able<a name="line.415"></a>
+<span class="sourceLineNo">416</span> * to start B.<a name="line.416"></a>
+<span class="sourceLineNo">417</span> * <p/><a name="line.417"></a>
+<span class="sourceLineNo">418</span> * How do we know with the only information in B that we are not ready.<a name="line.418"></a>
+<span class="sourceLineNo">419</span> * <ul><a name="line.419"></a>
+<span class="sourceLineNo">420</span> * <li>easy case, the parent is missing from the global map</li><a name="line.420"></a>
+<span class="sourceLineNo">421</span> * <li>more complex case we look at the Stack IDs.</li><a name="line.421"></a>
+<span class="sourceLineNo">422</span> * </ul><a name="line.422"></a>
+<span class="sourceLineNo">423</span> * The Stack-IDs are added to the procedure order as an incremental index tracking how many times<a name="line.423"></a>
+<span class="sourceLineNo">424</span> * that procedure was executed, which is equivalent to the number of times we wrote the procedure<a name="line.424"></a>
+<span class="sourceLineNo">425</span> * to the WAL. <br/><a name="line.425"></a>
+<span class="sourceLineNo">426</span> * In the example above:<a name="line.426"></a>
+<span class="sourceLineNo">427</span> *<a name="line.427"></a>
+<span class="sourceLineNo">428</span> * <pre><a name="line.428"></a>
+<span class="sourceLineNo">429</span> * wal-2: B has stackId = [1, 2]<a name="line.429"></a>
+<span class="sourceLineNo">430</span> * wal-1: B has stackId = [1]<a name="line.430"></a>
+<span class="sourceLineNo">431</span> * wal-1: A has stackId = [0]<a name="line.431"></a>
+<span class="sourceLineNo">432</span> * </pre><a name="line.432"></a>
+<span class="sourceLineNo">433</span> *<a name="line.433"></a>
+<span class="sourceLineNo">434</span> * Since we know that the Stack-IDs are incremental for a Procedure, we notice that there is a gap<a name="line.434"></a>
+<span class="sourceLineNo">435</span> * in the stackIds of B, so something was executed before.<a name="line.435"></a>
+<span class="sourceLineNo">436</span> * <p/><a name="line.436"></a>
+<span class="sourceLineNo">437</span> * To identify when a Procedure is ready we do the sum of the stackIds of the procedure and the<a name="line.437"></a>
+<span class="sourceLineNo">438</span> * parent. if the stackIdSum is equal to the sum of {1..maxStackId} then everything we need is<a name="line.438"></a>
+<span class="sourceLineNo">439</span> * available.<a name="line.439"></a>
+<span class="sourceLineNo">440</span> * <p/><a name="line.440"></a>
+<span class="sourceLineNo">441</span> * Example-2<a name="line.441"></a>
+<span class="sourceLineNo">442</span> *<a name="line.442"></a>
+<span class="sourceLineNo">443</span> * <pre><a name="line.443"></a>
+<span class="sourceLineNo">444</span> * wal-2 | A | A stackIds = [0, 2]<a name="line.444"></a>
+<span class="sourceLineNo">445</span> * wal-1 | A B | B stackIds = [1]<a name="line.445"></a>
+<span class="sourceLineNo">446</span> * </pre><a name="line.446"></a>
+<span class="sourceLineNo">447</span> *<a name="line.447"></a>
+<span class="sourceLineNo">448</span> * There is a gap between A stackIds so something was executed in between.<a name="line.448"></a>
+<span class="sourceLineNo">449</span> */<a name="line.449"></a>
+<span class="sourceLineNo">450</span> private boolean checkReadyToRun(Entry rootEntry) {<a name="line.450"></a>
+<span class="sourceLineNo">451</span> assert !rootEntry.hasParent() : "expected root procedure, got " + rootEntry;<a name="line.451"></a>
+<span class="sourceLineNo">452</span><a name="line.452"></a>
+<span class="sourceLineNo">453</span> if (rootEntry.isFinished()) {<a name="line.453"></a>
+<span class="sourceLineNo">454</span> // If the root procedure is finished, sub-procedures should be gone<a name="line.454"></a>
+<span class="sourceLineNo">455</span> if (rootEntry.childHead != null) {<a name="line.455"></a>
+<span class="sourceLineNo">456</span> LOG.error("unexpected active children for root-procedure: {}", rootEntry);<a name="line.456"></a>
+<span class="sourceLineNo">457</span> for (Entry p = rootEntry.childHead; p != null; p = p.linkNext) {<a name="line.457"></a>
+<span class="sourceLineNo">458</span> LOG.error("unexpected active children: {}", p);<a name="line.458"></a>
+<span class="sourceLineNo">459</span> }<a name="line.459"></a>
+<span class="sourceLineNo">460</span> }<a name="line.460"></a>
+<span class="sourceLineNo">461</span><a name="line.461"></a>
+<span class="sourceLineNo">462</span> assert rootEntry.childHead == null : "unexpected children on root completion. " + rootEntry;<a name="line.462"></a>
+<span class="sourceLineNo">463</span> rootEntry.ready = true;<a name="line.463"></a>
+<span class="sourceLineNo">464</span> return true;<a name="line.464"></a>
+<span class="sourceLineNo">465</span> }<a name="line.465"></a>
+<span class="sourceLineNo">466</span><a name="line.466"></a>
+<span class="sourceLineNo">467</span> int stackIdSum = 0;<a name="line.467"></a>
+<span class="sourceLineNo">468</span> int maxStackId = 0;<a name="line.468"></a>
+<span class="sourceLineNo">469</span> for (int i = 0; i < rootEntry.proto.getStackIdCount(); ++i) {<a name="line.469"></a>
+<span class="sourceLineNo">470</span> int stackId = 1 + rootEntry.proto.getStackId(i);<a name="line.470"></a>
+<span class="sourceLineNo">471</span> maxStackId = Math.max(maxStackId, stackId);<a name="line.471"></a>
+<span class="sourceLineNo">472</span> stackIdSum += stackId;<a name="line.472"></a>
+<span class="sourceLineNo">473</span> LOG.trace("stackId={} stackIdSum={} maxStackid={} {}", stackId, stackIdSum, maxStackId,<a name="line.473"></a>
+<span class="sourceLineNo">474</span> rootEntry);<a name="line.474"></a>
+<span class="sourceLineNo">475</span> }<a name="line.475"></a>
+<span class="sourceLineNo">476</span><a name="line.476"></a>
+<span class="sourceLineNo">477</span> for (Entry p = rootEntry.childHead; p != null; p = p.linkNext) {<a name="line.477"></a>
+<span class="sourceLineNo">478</span> for (int i = 0; i < p.proto.getStackIdCount(); ++i) {<a name="line.478"></a>
+<span class="sourceLineNo">479</span> int stackId = 1 + p.proto.getStackId(i);<a name="line.479"></a>
+<span class="sourceLineNo">480</span> maxStackId = Math.max(maxStackId, stackId);<a name="line.480"></a>
+<span class="sourceLineNo">481</span> stackIdSum += stackId;<a name="line.481"></a>
+<span class="sourceLineNo">482</span> LOG.trace("stackId={} stackIdSum={} maxStackid={} {}", stackId, stackIdSum, maxStackId, p);<a name="line.482"></a>
+<span class="sourceLineNo">483</span> }<a name="line.483"></a>
+<span class="sourceLineNo">484</span> }<a name="line.484"></a>
+<span class="sourceLineNo">485</span> // The cmpStackIdSum is this formula for finding the sum of a series of numbers:<a name="line.485"></a>
+<span class="sourceLineNo">486</span> // http://www.wikihow.com/Sum-the-Integers-from-1-to-N#/Image:Sum-the-Integers-from-1-to-N-Step-2-Version-3.jpg<a name="line.486"></a>
+<span class="sourceLineNo">487</span> final int cmpStackIdSum = (maxStackId * (maxStackId + 1) / 2);<a name="line.487"></a>
+<span class="sourceLineNo">488</span> if (cmpStackIdSum == stackIdSum) {<a name="line.488"></a>
+<span class="sourceLineNo">489</span> rootEntry.ready = true;<a name="line.489"></a>
+<span class="sourceLineNo">490</span> for (Entry p = rootEntry.childHead; p != null; p = p.linkNext) {<a name="line.490"></a>
+<span class="sourceLineNo">491</span> p.ready = true;<a name="line.491"></a>
+<span class="sourceLineNo">492</span> }<a name="line.492"></a>
+<span class="sourceLineNo">493</span> return true;<a name="line.493"></a>
+<span class="sourceLineNo">494</span> }<a name="line.494"></a>
+<span class="sourceLineNo">495</span> return false;<a name="line.495"></a>
+<span class="sourceLineNo">496</span> }<a name="line.496"></a>
+<span class="sourceLineNo">497</span><a name="line.497"></a>
+<span class="sourceLineNo">498</span> private void unlinkFromReplayList(Entry entry) {<a name="line.498"></a>
+<span class="sourceLineNo">499</span> if (replayOrderHead == entry) {<a name="line.499"></a>
+<span class="sourceLineNo">500</span> replayOrderHead = entry.replayNext;<a name="line.500"></a>
+<span class="sourceLineNo">501</span> }<a name="line.501"></a>
+<span class="sourceLineNo">502</span> if (replayOrderTail == entry) {<a name="line.502"></a>
+<span class="sourceLineNo">503</span> replayOrderTail = entry.replayPrev;<a name="line.503"></a>
+<span class="sourceLineNo">504</span> }<a name="line.504"></a>
+<span class="sourceLineNo">505</span> if (entry.replayPrev != null) {<a name="line.505"></a>
+<span class="sourceLineNo">506</span> entry.replayPrev.replayNext = entry.replayNext;<a name="line.506"></a>
+<span class="sourceLineNo">507</span> }<a name="line.507"></a>
+<span class="sourceLineNo">508</span> if (entry.replayNext != null) {<a name="line.508"></a>
+<span class="sourceLineNo">509</span> entry.replayNext.replayPrev = entry.replayPrev;<a name="line.509"></a>
+<span class="sourceLineNo">510</span> }<a name="line.510"></a>
+<span class="sourceLineNo">511</span> }<a name="line.511"></a>
+<span class="sourceLineNo">512</span><a name="line.512"></a>
+<span class="sourceLineNo">513</span> private void addToReplayList(final Entry entry) {<a name="line.513"></a>
+<span class="sourceLineNo">514</span> unlinkFromReplayList(entry);<a name="line.514"></a>
+<span class="sourceLineNo">515</span> entry.replayNext = replayOrderHead;<a name="line.515"></a>
+<span class="sourceLineNo">516</span> entry.replayPrev = null;<a name="line.516"></a>
+<span class="sourceLineNo">517</span> if (replayOrderHead != null) {<a name="line.517"></a>
+<span class="sourceLineNo">518</span> replayOrderHead.replayPrev = entry;<a name="line.518"></a>
+<span class="sourceLineNo">519</span> } else {<a name="line.519"></a>
+<span class="sourceLineNo">520</span> replayOrderTail = entry;<a name="line.520"></a>
+<span class="sourceLineNo">521</span> }<a name="line.521"></a>
+<span class="sourceLineNo">522</span> replayOrderHead = entry;<a name="line.522"></a>
+<span class="sourceLineNo">523</span> }<a name="line.523"></a>
+<span class="sourceLineNo">524</span><a name="line.524"></a>
+<span class="sourceLineNo">525</span> private void unlinkFromLinkList(Entry entry) {<a name="line.525"></a>
+<span class="sourceLineNo">526</span> if (entry == rootHead) {<a name="line.526"></a>
+<span class="sourceLineNo">527</span> rootHead = entry.linkNext;<a name="line.527"></a>
+<span class="sourceLineNo">528</span> } else if (entry == childUnlinkedHead) {<a name="line.528"></a>
+<span class="sourceLineNo">529</span> childUnlinkedHead = entry.linkNext;<a name="line.529"></a>
+<span class="sourceLineNo">530</span> }<a name="line.530"></a>
+<span class="sourceLineNo">531</span> if (entry.linkPrev != null) {<a name="line.531"></a>
+<span class="sourceLineNo">532</span> entry.linkPrev.linkNext = entry.linkNext;<a name="line.532"></a>
+<span class="sourceLineNo">533</span> }<a name="line.533"></a>
+<span class="sourceLineNo">534</span> if (entry.linkNext != null) {<a name="line.534"></a>
+<span class="sourceLineNo">535</span> entry.linkNext.linkPrev = entry.linkPrev;<a name="line.535"></a>
+<span class="sourceLineNo">536</span> }<a name="line.536"></a>
+<span class="sourceLineNo">537</span> }<a name="line.537"></a>
+<span class="sourceLineNo">538</span><a name="line.538"></a>
+<span class="sourceLineNo">539</span> private Entry addToLinkList(Entry entry, Entry linkHead) {<a name="line.539"></a>
+<span class="sourceLineNo">540</span> unlinkFromLinkList(entry);<a name="line.540"></a>
+<span class="sourceLineNo">541</span> entry.linkNext = linkHead;<a name="line.541"></a>
+<span class="sourceLineNo">542</span> entry.linkPrev = null;<a name="line.542"></a>
+<span class="sourceLineNo">543</span> if (linkHead != null) {<a name="line.543"></a>
+<span class="sourceLineNo">544</span> linkHead.linkPrev = entry;<a name="line.544"></a>
+<span class="sourceLineNo">545</span> }<a name="line.545"></a>
+<span class="sourceLineNo">546</span> return entry;<a name="line.546"></a>
+<span class="sourceLineNo">547</span> }<a name="line.547"></a>
+<span class="sourceLineNo">548</span><a name="line.548"></a>
+<span class="sourceLineNo">549</span> private Entry findLinkListTail(Entry linkHead) {<a name="line.549"></a>
+<span class="sourceLineNo">550</span> Entry tail = linkHead;<a name="line.550"></a>
+<span class="sourceLineNo">551</span> while (tail.linkNext != null) {<a name="line.551"></a>
+<span class="sourceLineNo">552</span> tail = tail.linkNext;<a name="line.552"></a>
+<span class="sourceLineNo">553</span> }<a name="line.553"></a>
+<span class="sourceLineNo">554</span> return tail;<a name="line.554"></a>
+<span class="sourceLineNo">555</span> }<a name="line.555"></a>
+<span class="sourceLineNo">556</span><a name="line.556"></a>
+<span class="sourceLineNo">557</span> private Entry addToMap(long procId, boolean hasParent) {<a name="line.557"></a>
+<span class="sourceLineNo">558</span> int slotIndex = getMapSlot(procId);<a name="line.558"></a>
+<span class="sourceLineNo">559</span> Entry entry = getProcedure(slotIndex, procId);<a name="line.559"></a>
+<span class="sourceLineNo">560</span> if (entry != null) {<a name="line.560"></a>
+<span class="sourceLineNo">561</span> return entry;<a name="line.561"></a>
+<span class="sourceLineNo">562</span> }<a name="line.562"></a>
+<span class="sourceLineNo">563</span><a name="line.563"></a>
+<span class="sourceLineNo">564</span> entry = new Entry(procedureMap[slotIndex]);<a name="line.564"></a>
+<span class="sourceLineNo">565</span> procedureMap[slotIndex] = entry;<a name="line.565"></a>
+<span class="sourceLineNo">566</span> return entry;<a name="line.566"></a>
+<span class="sourceLineNo">567</span> }<a name="line.567"></a>
+<span class="sourceLineNo">568</span><a name="line.568"></a>
+<span class="sourceLineNo">569</span> private Entry removeFromMap(final long procId) {<a name="line.569"></a>
+<span class="sourceLineNo">570</span> int slotIndex = getMapSlot(procId);<a name="line.570"></a>
+<span class="sourceLineNo">571</span> Entry prev = null;<a name="line.571"></a>
+<span class="sourceLineNo">572</span> Entry entry = procedureMap[slotIndex];<a name="line.572"></a>
+<span class="sourceLineNo">573</span> while (entry != null) {<a name="line.573"></a>
+<span class="sourceLineNo">574</span> if (procId == entry.getProcId()) {<a name="line.574"></a>
+<span class="sourceLineNo">575</span> if (prev != null) {<a name="line.575"></a>
+<span class="sourceLineNo">576</span> prev.hashNext = entry.hashNext;<a name="line.576"></a>
+<span class="sourceLineNo">577</span> } else {<a name="line.577"></a>
+<span class="sourceLineNo">578</span> procedureMap[slotIndex] = entry.hashNext;<a name="line.578"></a>
+<span class="sourceLineNo">579</span> }<a name="line.579"></a>
+<span class="sourceLineNo">580</span> entry.hashNext = null;<a name="line.580"></a>
+<span class="sourceLineNo">581</span> return entry;<a name="line.581"></a>
+<span class="sourceLineNo">582</span> }<a name="line.582"></a>
+<span class="sourceLineNo">583</span> prev = entry;<a name="line.583"></a>
+<span class="sourceLineNo">584</span> entry = entry.hashNext;<a name="line.584"></a>
+<span class="sourceLineNo">585</span> }<a name="line.585"></a>
+<span class="sourceLineNo">586</span> return null;<a name="line.586"></a>
+<span class="sourceLineNo">587</span> }<a name="line.587"></a>
+<span class="sourceLineNo">588</span><a name="line.588"></a>
+<span class="sourceLineNo">589</span> private Entry getProcedure(long procId) {<a name="line.589"></a>
+<span class="sourceLineNo">590</span> return getProcedure(getMapSlot(procId), procId);<a name="line.590"></a>
+<span class="sourceLineNo">591</span> }<a name="line.591"></a>
+<span class="sourceLineNo">592</span><a name="line.592"></a>
+<span class="sourceLineNo">593</span> private Entry getProcedure(int slotIndex, long procId) {<a name="line.593"></a>
+<span class="sourceLineNo">594</span> Entry entry = procedureMap[slotIndex];<a name="line.594"></a>
+<span class="sourceLineNo">595</span> while (entry != null) {<a name="line.595"></a>
+<span class="sourceLineNo">596</span> if (procId == entry.getProcId()) {<a name="line.596"></a>
+<span class="sourceLineNo">597</span> return entry;<a name="line.597"></a>
+<span class="sourceLineNo">598</span> }<a name="line.598"></a>
+<span class="sourceLineNo">599</span> entry = entry.hashNext;<a name="line.599"></a>
+<span class="sourceLineNo">600</span> }<a name="line.600"></a>
+<span class="sourceLineNo">601</span> return null;<a name="line.601"></a>
+<span class="sourceLineNo">602</span> }<a name="line.602"></a>
+<span class="sourceLineNo">603</span><a name="line.603"></a>
+<span class="sourceLineNo">604</span> private int getMapSlot(long procId) {<a name="line.604"></a>
+<span class="sourceLineNo">605</span> return (int) (Procedure.getProcIdHashCode(procId) % procedureMap.length);<a name="line.605"></a>
+<span class="sourceLineNo">606</span> }<a name="line.606"></a>
+<span class="sourceLineNo">607</span>}<a name="line.607"></a>
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+</pre>
+</div>
+</body>
+</html>