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From elecha...@apache.org
Subject svn commit: r874484 [26/45] - in /websites/production/directory/content/mavibot/gen-docs: ./ 1.0.0-M1/ 1.0.0-M1/apidocs/ 1.0.0-M1/apidocs/org/ 1.0.0-M1/apidocs/org/apache/ 1.0.0-M1/apidocs/org/apache/directory/ 1.0.0-M1/apidocs/org/apache/directory/mav...
Date Tue, 13 Aug 2013 15:42:17 GMT
Added: websites/production/directory/content/mavibot/gen-docs/1.0.0-M1/xref/org/apache/directory/mavibot/btree/BTree.html
==============================================================================
--- websites/production/directory/content/mavibot/gen-docs/1.0.0-M1/xref/org/apache/directory/mavibot/btree/BTree.html (added)
+++ websites/production/directory/content/mavibot/gen-docs/1.0.0-M1/xref/org/apache/directory/mavibot/btree/BTree.html Tue Aug 13 15:42:13 2013
@@ -0,0 +1,1971 @@
+<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
+<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en_US" lang="en_US">
+<head>
+<meta http-equiv="content-type" content="text/html; charset=UTF-8" />
+<title>BTree xref</title>
+<link type="text/css" rel="stylesheet" href="../../../../../stylesheet.css" />
+</head>
+<body>
+<div id="overview"><a href="../../../../../../apidocs/org/apache/directory/mavibot/btree/BTree.html">View Javadoc</a></div><pre>
+
+<a class="jxr_linenumber" name="1" href="#1">1</a>   <em class="jxr_comment">/*</em>
+<a class="jxr_linenumber" name="2" href="#2">2</a>   <em class="jxr_comment"> *  Licensed to the Apache Software Foundation (ASF) under one</em>
+<a class="jxr_linenumber" name="3" href="#3">3</a>   <em class="jxr_comment"> *  or more contributor license agreements.  See the NOTICE file</em>
+<a class="jxr_linenumber" name="4" href="#4">4</a>   <em class="jxr_comment"> *  distributed with this work for additional information</em>
+<a class="jxr_linenumber" name="5" href="#5">5</a>   <em class="jxr_comment"> *  regarding copyright ownership.  The ASF licenses this file</em>
+<a class="jxr_linenumber" name="6" href="#6">6</a>   <em class="jxr_comment"> *  to you under the Apache License, Version 2.0 (the</em>
+<a class="jxr_linenumber" name="7" href="#7">7</a>   <em class="jxr_comment"> *  "License"); you may not use this file except in compliance</em>
+<a class="jxr_linenumber" name="8" href="#8">8</a>   <em class="jxr_comment"> *  with the License.  You may obtain a copy of the License at</em>
+<a class="jxr_linenumber" name="9" href="#9">9</a>   <em class="jxr_comment"> *</em>
+<a class="jxr_linenumber" name="10" href="#10">10</a>  <em class="jxr_comment"> *    <a href="http://www.apache.org/licenses/LICENSE-2.0" target="alexandria_uri">http://www.apache.org/licenses/LICENSE-2.0</a></em>
+<a class="jxr_linenumber" name="11" href="#11">11</a>  <em class="jxr_comment"> *</em>
+<a class="jxr_linenumber" name="12" href="#12">12</a>  <em class="jxr_comment"> *  Unless required by applicable law or agreed to in writing,</em>
+<a class="jxr_linenumber" name="13" href="#13">13</a>  <em class="jxr_comment"> *  software distributed under the License is distributed on an</em>
+<a class="jxr_linenumber" name="14" href="#14">14</a>  <em class="jxr_comment"> *  "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY</em>
+<a class="jxr_linenumber" name="15" href="#15">15</a>  <em class="jxr_comment"> *  KIND, either express or implied.  See the License for the</em>
+<a class="jxr_linenumber" name="16" href="#16">16</a>  <em class="jxr_comment"> *  specific language governing permissions and limitations</em>
+<a class="jxr_linenumber" name="17" href="#17">17</a>  <em class="jxr_comment"> *  under the License.</em>
+<a class="jxr_linenumber" name="18" href="#18">18</a>  <em class="jxr_comment"> *</em>
+<a class="jxr_linenumber" name="19" href="#19">19</a>  <em class="jxr_comment"> */</em>
+<a class="jxr_linenumber" name="20" href="#20">20</a>  <strong class="jxr_keyword">package</strong> org.apache.directory.mavibot.btree;
+<a class="jxr_linenumber" name="21" href="#21">21</a>  
+<a class="jxr_linenumber" name="22" href="#22">22</a>  
+<a class="jxr_linenumber" name="23" href="#23">23</a>  <strong class="jxr_keyword">import</strong> java.io.EOFException;
+<a class="jxr_linenumber" name="24" href="#24">24</a>  <strong class="jxr_keyword">import</strong> java.io.File;
+<a class="jxr_linenumber" name="25" href="#25">25</a>  <strong class="jxr_keyword">import</strong> java.io.FileOutputStream;
+<a class="jxr_linenumber" name="26" href="#26">26</a>  <strong class="jxr_keyword">import</strong> java.io.IOException;
+<a class="jxr_linenumber" name="27" href="#27">27</a>  <strong class="jxr_keyword">import</strong> java.io.RandomAccessFile;
+<a class="jxr_linenumber" name="28" href="#28">28</a>  <strong class="jxr_keyword">import</strong> java.lang.reflect.ParameterizedType;
+<a class="jxr_linenumber" name="29" href="#29">29</a>  <strong class="jxr_keyword">import</strong> java.lang.reflect.Type;
+<a class="jxr_linenumber" name="30" href="#30">30</a>  <strong class="jxr_keyword">import</strong> java.nio.ByteBuffer;
+<a class="jxr_linenumber" name="31" href="#31">31</a>  <strong class="jxr_keyword">import</strong> java.nio.channels.FileChannel;
+<a class="jxr_linenumber" name="32" href="#32">32</a>  <strong class="jxr_keyword">import</strong> java.util.Comparator;
+<a class="jxr_linenumber" name="33" href="#33">33</a>  <strong class="jxr_keyword">import</strong> java.util.LinkedList;
+<a class="jxr_linenumber" name="34" href="#34">34</a>  <strong class="jxr_keyword">import</strong> java.util.List;
+<a class="jxr_linenumber" name="35" href="#35">35</a>  <strong class="jxr_keyword">import</strong> java.util.concurrent.BlockingQueue;
+<a class="jxr_linenumber" name="36" href="#36">36</a>  <strong class="jxr_keyword">import</strong> java.util.concurrent.ConcurrentLinkedQueue;
+<a class="jxr_linenumber" name="37" href="#37">37</a>  <strong class="jxr_keyword">import</strong> java.util.concurrent.LinkedBlockingDeque;
+<a class="jxr_linenumber" name="38" href="#38">38</a>  <strong class="jxr_keyword">import</strong> java.util.concurrent.locks.ReentrantLock;
+<a class="jxr_linenumber" name="39" href="#39">39</a>  
+<a class="jxr_linenumber" name="40" href="#40">40</a>  <strong class="jxr_keyword">import</strong> org.apache.directory.mavibot.btree.exception.KeyNotFoundException;
+<a class="jxr_linenumber" name="41" href="#41">41</a>  <strong class="jxr_keyword">import</strong> org.apache.directory.mavibot.btree.serializer.BufferHandler;
+<a class="jxr_linenumber" name="42" href="#42">42</a>  <strong class="jxr_keyword">import</strong> org.apache.directory.mavibot.btree.serializer.ElementSerializer;
+<a class="jxr_linenumber" name="43" href="#43">43</a>  <strong class="jxr_keyword">import</strong> org.apache.directory.mavibot.btree.serializer.LongSerializer;
+<a class="jxr_linenumber" name="44" href="#44">44</a>  <strong class="jxr_keyword">import</strong> org.slf4j.Logger;
+<a class="jxr_linenumber" name="45" href="#45">45</a>  <strong class="jxr_keyword">import</strong> org.slf4j.LoggerFactory;
+<a class="jxr_linenumber" name="46" href="#46">46</a>  
+<a class="jxr_linenumber" name="47" href="#47">47</a>  
+<a class="jxr_linenumber" name="48" href="#48">48</a>  <em class="jxr_javadoccomment">/**</em>
+<a class="jxr_linenumber" name="49" href="#49">49</a>  <em class="jxr_javadoccomment"> * The B+Tree MVCC data structure.</em>
+<a class="jxr_linenumber" name="50" href="#50">50</a>  <em class="jxr_javadoccomment"> * </em>
+<a class="jxr_linenumber" name="51" href="#51">51</a>  <em class="jxr_javadoccomment"> * @param &lt;K&gt; The type for the keys</em>
+<a class="jxr_linenumber" name="52" href="#52">52</a>  <em class="jxr_javadoccomment"> * @param &lt;V&gt; The type for the stored values</em>
+<a class="jxr_linenumber" name="53" href="#53">53</a>  <em class="jxr_javadoccomment"> *</em>
+<a class="jxr_linenumber" name="54" href="#54">54</a>  <em class="jxr_javadoccomment"> * @author &lt;a href="<a href="mailto:labs@labs.apache.org" target="alexandria_uri">mailto:labs@labs.apache.org</a>"&gt;Mavibot labs Project&lt;/a&gt;</em>
+<a class="jxr_linenumber" name="55" href="#55">55</a>  <em class="jxr_javadoccomment"> */</em>
+<a class="jxr_linenumber" name="56" href="#56">56</a>  <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">class</strong> BTree&lt;K, V&gt;
+<a class="jxr_linenumber" name="57" href="#57">57</a>  {
+<a class="jxr_linenumber" name="58" href="#58">58</a>      <em class="jxr_javadoccomment">/**</em><em class="jxr_javadoccomment"> The LoggerFactory used by this class */</em>
+<a class="jxr_linenumber" name="59" href="#59">59</a>      <strong class="jxr_keyword">protected</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">final</strong> Logger LOG = LoggerFactory.getLogger( BTree.<strong class="jxr_keyword">class</strong> );
+<a class="jxr_linenumber" name="60" href="#60">60</a>  
+<a class="jxr_linenumber" name="61" href="#61">61</a>      <em class="jxr_javadoccomment">/**</em><em class="jxr_javadoccomment"> The Header for a managed <a href="../../../../../org/apache/directory/mavibot/btree/BTree.html">BTree</a> */</em>
+<a class="jxr_linenumber" name="62" href="#62">62</a>      <strong class="jxr_keyword">private</strong> <a href="../../../../../org/apache/directory/mavibot/btree/BTreeHeader.html">BTreeHeader</a> btreeHeader;
+<a class="jxr_linenumber" name="63" href="#63">63</a>  
+<a class="jxr_linenumber" name="64" href="#64">64</a>      <em class="jxr_javadoccomment">/**</em><em class="jxr_javadoccomment"> Default page size (number of entries per node) */</em>
+<a class="jxr_linenumber" name="65" href="#65">65</a>      <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">int</strong> DEFAULT_PAGE_SIZE = 16;
+<a class="jxr_linenumber" name="66" href="#66">66</a>  
+<a class="jxr_linenumber" name="67" href="#67">67</a>      <em class="jxr_javadoccomment">/**</em><em class="jxr_javadoccomment"> Default size of the buffer used to write data on disk. Around 1Mb */</em>
+<a class="jxr_linenumber" name="68" href="#68">68</a>      <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">int</strong> DEFAULT_WRITE_BUFFER_SIZE = 4096 * 250;
+<a class="jxr_linenumber" name="69" href="#69">69</a>  
+<a class="jxr_linenumber" name="70" href="#70">70</a>      <em class="jxr_javadoccomment">/**</em><em class="jxr_javadoccomment"> The default journal name */</em>
+<a class="jxr_linenumber" name="71" href="#71">71</a>      <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">final</strong> String DEFAULT_JOURNAL = <span class="jxr_string">"mavibot.log"</span>;
+<a class="jxr_linenumber" name="72" href="#72">72</a>  
+<a class="jxr_linenumber" name="73" href="#73">73</a>      <em class="jxr_javadoccomment">/**</em><em class="jxr_javadoccomment"> The default data file suffix */</em>
+<a class="jxr_linenumber" name="74" href="#74">74</a>      <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">final</strong> String DATA_SUFFIX = <span class="jxr_string">".db"</span>;
+<a class="jxr_linenumber" name="75" href="#75">75</a>  
+<a class="jxr_linenumber" name="76" href="#76">76</a>      <em class="jxr_javadoccomment">/**</em><em class="jxr_javadoccomment"> The default journal file suffix */</em>
+<a class="jxr_linenumber" name="77" href="#77">77</a>      <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">final</strong> String JOURNAL_SUFFIX = <span class="jxr_string">".log"</span>;
+<a class="jxr_linenumber" name="78" href="#78">78</a>  
+<a class="jxr_linenumber" name="79" href="#79">79</a>      <em class="jxr_javadoccomment">/**</em><em class="jxr_javadoccomment"> Comparator used to index entries. */</em>
+<a class="jxr_linenumber" name="80" href="#80">80</a>      <strong class="jxr_keyword">private</strong> Comparator&lt;K&gt; comparator;
+<a class="jxr_linenumber" name="81" href="#81">81</a>  
+<a class="jxr_linenumber" name="82" href="#82">82</a>      <em class="jxr_javadoccomment">/**</em><em class="jxr_javadoccomment"> The current rootPage */</em>
+<a class="jxr_linenumber" name="83" href="#83">83</a>      <strong class="jxr_keyword">protected</strong> <strong class="jxr_keyword">volatile</strong> Page&lt;K, V&gt; rootPage;
+<a class="jxr_linenumber" name="84" href="#84">84</a>  
+<a class="jxr_linenumber" name="85" href="#85">85</a>      <em class="jxr_javadoccomment">/**</em><em class="jxr_javadoccomment"> The list of read transactions being executed */</em>
+<a class="jxr_linenumber" name="86" href="#86">86</a>      <strong class="jxr_keyword">private</strong> ConcurrentLinkedQueue&lt;Transaction&lt;K, V&gt;&gt; readTransactions;
+<a class="jxr_linenumber" name="87" href="#87">87</a>  
+<a class="jxr_linenumber" name="88" href="#88">88</a>      <em class="jxr_javadoccomment">/**</em><em class="jxr_javadoccomment"> The size of the buffer used to write data in disk */</em>
+<a class="jxr_linenumber" name="89" href="#89">89</a>      <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">int</strong> writeBufferSize;
+<a class="jxr_linenumber" name="90" href="#90">90</a>  
+<a class="jxr_linenumber" name="91" href="#91">91</a>      <em class="jxr_javadoccomment">/**</em><em class="jxr_javadoccomment"> The type to use to create the keys */</em>
+<a class="jxr_linenumber" name="92" href="#92">92</a>      <strong class="jxr_keyword">protected</strong> Class&lt;?&gt; keyType;
+<a class="jxr_linenumber" name="93" href="#93">93</a>  
+<a class="jxr_linenumber" name="94" href="#94">94</a>      <em class="jxr_javadoccomment">/**</em><em class="jxr_javadoccomment"> The Key serializer used for this tree.*/</em>
+<a class="jxr_linenumber" name="95" href="#95">95</a>      <strong class="jxr_keyword">private</strong> ElementSerializer&lt;K&gt; keySerializer;
+<a class="jxr_linenumber" name="96" href="#96">96</a>  
+<a class="jxr_linenumber" name="97" href="#97">97</a>      <em class="jxr_javadoccomment">/**</em><em class="jxr_javadoccomment"> The Value serializer used for this tree. */</em>
+<a class="jxr_linenumber" name="98" href="#98">98</a>      <strong class="jxr_keyword">private</strong> ElementSerializer&lt;V&gt; valueSerializer;
+<a class="jxr_linenumber" name="99" href="#99">99</a>  
+<a class="jxr_linenumber" name="100" href="#100">100</a>     <em class="jxr_javadoccomment">/**</em><em class="jxr_javadoccomment"> The associated file. If null, this is an in-memory btree  */</em>
+<a class="jxr_linenumber" name="101" href="#101">101</a>     <strong class="jxr_keyword">private</strong> File file;
+<a class="jxr_linenumber" name="102" href="#102">102</a> 
+<a class="jxr_linenumber" name="103" href="#103">103</a>     <em class="jxr_javadoccomment">/**</em><em class="jxr_javadoccomment"> The <a href="../../../../../org/apache/directory/mavibot/btree/RecordManager.html">RecordManager</a> if the <a href="../../../../../org/apache/directory/mavibot/btree/BTree.html">BTree</a> is managed */</em>
+<a class="jxr_linenumber" name="104" href="#104">104</a>     <strong class="jxr_keyword">private</strong> <a href="../../../../../org/apache/directory/mavibot/btree/RecordManager.html">RecordManager</a> recordManager;
+<a class="jxr_linenumber" name="105" href="#105">105</a> 
+<a class="jxr_linenumber" name="106" href="#106">106</a>     <em class="jxr_javadoccomment">/**</em><em class="jxr_javadoccomment"> The <a href="../../../../../org/apache/directory/mavibot/btree/BTree.html">BTree</a> type : either in-memory, persistent or managed */</em>
+<a class="jxr_linenumber" name="107" href="#107">107</a>     <strong class="jxr_keyword">private</strong> <a href="../../../../../org/apache/directory/mavibot/btree/BTreeTypeEnum.html">BTreeTypeEnum</a> type;
+<a class="jxr_linenumber" name="108" href="#108">108</a> 
+<a class="jxr_linenumber" name="109" href="#109">109</a>     <em class="jxr_javadoccomment">/**</em><em class="jxr_javadoccomment"> A flag used to tell the <a href="../../../../../org/apache/directory/mavibot/btree/BTree.html">BTree</a> that the journal is activated */</em>
+<a class="jxr_linenumber" name="110" href="#110">110</a>     <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">boolean</strong> withJournal;
+<a class="jxr_linenumber" name="111" href="#111">111</a> 
+<a class="jxr_linenumber" name="112" href="#112">112</a>     <em class="jxr_javadoccomment">/**</em><em class="jxr_javadoccomment"> The associated journal. If null, this is an in-memory btree  */</em>
+<a class="jxr_linenumber" name="113" href="#113">113</a>     <strong class="jxr_keyword">private</strong> File journal;
+<a class="jxr_linenumber" name="114" href="#114">114</a> 
+<a class="jxr_linenumber" name="115" href="#115">115</a>     <em class="jxr_javadoccomment">/**</em><em class="jxr_javadoccomment"> A lock used to protect the write operation against concurrent access */</em>
+<a class="jxr_linenumber" name="116" href="#116">116</a>     <strong class="jxr_keyword">private</strong> ReentrantLock writeLock;
+<a class="jxr_linenumber" name="117" href="#117">117</a> 
+<a class="jxr_linenumber" name="118" href="#118">118</a>     <em class="jxr_javadoccomment">/**</em><em class="jxr_javadoccomment"> The thread responsible for the cleanup of timed out reads */</em>
+<a class="jxr_linenumber" name="119" href="#119">119</a>     <strong class="jxr_keyword">private</strong> Thread readTransactionsThread;
+<a class="jxr_linenumber" name="120" href="#120">120</a> 
+<a class="jxr_linenumber" name="121" href="#121">121</a>     <em class="jxr_javadoccomment">/**</em><em class="jxr_javadoccomment"> The thread responsible for the journal updates */</em>
+<a class="jxr_linenumber" name="122" href="#122">122</a>     <strong class="jxr_keyword">private</strong> Thread journalManagerThread;
+<a class="jxr_linenumber" name="123" href="#123">123</a> 
+<a class="jxr_linenumber" name="124" href="#124">124</a>     <em class="jxr_javadoccomment">/**</em><em class="jxr_javadoccomment"> Define a default delay for a read transaction. This is 10 seconds */</em>
+<a class="jxr_linenumber" name="125" href="#125">125</a>     <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">long</strong> DEFAULT_READ_TIMEOUT = 10 * 1000L;
+<a class="jxr_linenumber" name="126" href="#126">126</a> 
+<a class="jxr_linenumber" name="127" href="#127">127</a>     <em class="jxr_javadoccomment">/**</em><em class="jxr_javadoccomment"> The read transaction timeout */</em>
+<a class="jxr_linenumber" name="128" href="#128">128</a>     <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">long</strong> readTimeOut = DEFAULT_READ_TIMEOUT;
+<a class="jxr_linenumber" name="129" href="#129">129</a> 
+<a class="jxr_linenumber" name="130" href="#130">130</a>     <em class="jxr_javadoccomment">/**</em><em class="jxr_javadoccomment"> The queue containing all the modifications applied on the bTree */</em>
+<a class="jxr_linenumber" name="131" href="#131">131</a>     <strong class="jxr_keyword">private</strong> BlockingQueue&lt;Modification&lt;K, V&gt;&gt; modificationsQueue;
+<a class="jxr_linenumber" name="132" href="#132">132</a> 
+<a class="jxr_linenumber" name="133" href="#133">133</a>     <strong class="jxr_keyword">private</strong> File envDir;
+<a class="jxr_linenumber" name="134" href="#134">134</a> 
+<a class="jxr_linenumber" name="135" href="#135">135</a> 
+<a class="jxr_linenumber" name="136" href="#136">136</a>     <em class="jxr_javadoccomment">/**</em>
+<a class="jxr_linenumber" name="137" href="#137">137</a> <em class="jxr_javadoccomment">     * Create a thread that is responsible of cleaning the transactions when</em>
+<a class="jxr_linenumber" name="138" href="#138">138</a> <em class="jxr_javadoccomment">     * they hit the timeout</em>
+<a class="jxr_linenumber" name="139" href="#139">139</a> <em class="jxr_javadoccomment">     */</em>
+<a class="jxr_linenumber" name="140" href="#140">140</a>     <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">void</strong> createTransactionManager()
+<a class="jxr_linenumber" name="141" href="#141">141</a>     {
+<a class="jxr_linenumber" name="142" href="#142">142</a>         Runnable readTransactionTask = <strong class="jxr_keyword">new</strong> Runnable()
+<a class="jxr_linenumber" name="143" href="#143">143</a>         {
+<a class="jxr_linenumber" name="144" href="#144">144</a>             <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">void</strong> run()
+<a class="jxr_linenumber" name="145" href="#145">145</a>             {
+<a class="jxr_linenumber" name="146" href="#146">146</a>                 <strong class="jxr_keyword">try</strong>
+<a class="jxr_linenumber" name="147" href="#147">147</a>                 {
+<a class="jxr_linenumber" name="148" href="#148">148</a>                     Transaction&lt;K, V&gt; transaction = <strong class="jxr_keyword">null</strong>;
+<a class="jxr_linenumber" name="149" href="#149">149</a> 
+<a class="jxr_linenumber" name="150" href="#150">150</a>                     <strong class="jxr_keyword">while</strong> ( !Thread.currentThread().isInterrupted() )
+<a class="jxr_linenumber" name="151" href="#151">151</a>                     {
+<a class="jxr_linenumber" name="152" href="#152">152</a>                         <strong class="jxr_keyword">long</strong> timeoutDate = System.currentTimeMillis() - readTimeOut;
+<a class="jxr_linenumber" name="153" href="#153">153</a>                         <strong class="jxr_keyword">long</strong> t0 = System.currentTimeMillis();
+<a class="jxr_linenumber" name="154" href="#154">154</a>                         <strong class="jxr_keyword">int</strong> nbTxns = 0;
+<a class="jxr_linenumber" name="155" href="#155">155</a> 
+<a class="jxr_linenumber" name="156" href="#156">156</a>                         <em class="jxr_comment">// Loop on all the transactions from the queue</em>
+<a class="jxr_linenumber" name="157" href="#157">157</a>                         <strong class="jxr_keyword">while</strong> ( ( transaction = readTransactions.peek() ) != <strong class="jxr_keyword">null</strong> )
+<a class="jxr_linenumber" name="158" href="#158">158</a>                         {
+<a class="jxr_linenumber" name="159" href="#159">159</a>                             nbTxns++;
+<a class="jxr_linenumber" name="160" href="#160">160</a> 
+<a class="jxr_linenumber" name="161" href="#161">161</a>                             <strong class="jxr_keyword">if</strong> ( transaction.isClosed() )
+<a class="jxr_linenumber" name="162" href="#162">162</a>                             {
+<a class="jxr_linenumber" name="163" href="#163">163</a>                                 <em class="jxr_comment">// The transaction is already closed, remove it from the queue</em>
+<a class="jxr_linenumber" name="164" href="#164">164</a>                                 readTransactions.poll();
+<a class="jxr_linenumber" name="165" href="#165">165</a>                                 <strong class="jxr_keyword">continue</strong>;
+<a class="jxr_linenumber" name="166" href="#166">166</a>                             }
+<a class="jxr_linenumber" name="167" href="#167">167</a> 
+<a class="jxr_linenumber" name="168" href="#168">168</a>                             <em class="jxr_comment">// Check if the transaction has timed out</em>
+<a class="jxr_linenumber" name="169" href="#169">169</a>                             <strong class="jxr_keyword">if</strong> ( transaction.getCreationDate() &lt; timeoutDate )
+<a class="jxr_linenumber" name="170" href="#170">170</a>                             {
+<a class="jxr_linenumber" name="171" href="#171">171</a>                                 transaction.close();
+<a class="jxr_linenumber" name="172" href="#172">172</a>                                 readTransactions.poll();
+<a class="jxr_linenumber" name="173" href="#173">173</a>                                 <strong class="jxr_keyword">continue</strong>;
+<a class="jxr_linenumber" name="174" href="#174">174</a>                             }
+<a class="jxr_linenumber" name="175" href="#175">175</a> 
+<a class="jxr_linenumber" name="176" href="#176">176</a>                             <em class="jxr_comment">// We need to stop now</em>
+<a class="jxr_linenumber" name="177" href="#177">177</a>                             <strong class="jxr_keyword">break</strong>;
+<a class="jxr_linenumber" name="178" href="#178">178</a>                         }
+<a class="jxr_linenumber" name="179" href="#179">179</a> 
+<a class="jxr_linenumber" name="180" href="#180">180</a>                         <strong class="jxr_keyword">long</strong> t1 = System.currentTimeMillis();
+<a class="jxr_linenumber" name="181" href="#181">181</a> 
+<a class="jxr_linenumber" name="182" href="#182">182</a>                         <strong class="jxr_keyword">if</strong> ( nbTxns &gt; 0 )
+<a class="jxr_linenumber" name="183" href="#183">183</a>                         {
+<a class="jxr_linenumber" name="184" href="#184">184</a>                             System.out.println( <span class="jxr_string">"Processing old txn : "</span> + nbTxns + <span class="jxr_string">", "</span> + ( t1 - t0 ) + <span class="jxr_string">"ms"</span> );
+<a class="jxr_linenumber" name="185" href="#185">185</a>                         }
+<a class="jxr_linenumber" name="186" href="#186">186</a> 
+<a class="jxr_linenumber" name="187" href="#187">187</a>                         <em class="jxr_comment">// Wait until we reach the timeout</em>
+<a class="jxr_linenumber" name="188" href="#188">188</a>                         Thread.sleep( readTimeOut );
+<a class="jxr_linenumber" name="189" href="#189">189</a>                     }
+<a class="jxr_linenumber" name="190" href="#190">190</a>                 }
+<a class="jxr_linenumber" name="191" href="#191">191</a>                 <strong class="jxr_keyword">catch</strong> ( InterruptedException ie )
+<a class="jxr_linenumber" name="192" href="#192">192</a>                 {
+<a class="jxr_linenumber" name="193" href="#193">193</a>                     <em class="jxr_comment">//System.out.println( "Interrupted" );</em>
+<a class="jxr_linenumber" name="194" href="#194">194</a>                 }
+<a class="jxr_linenumber" name="195" href="#195">195</a>                 <strong class="jxr_keyword">catch</strong> ( Exception e )
+<a class="jxr_linenumber" name="196" href="#196">196</a>                 {
+<a class="jxr_linenumber" name="197" href="#197">197</a>                     <strong class="jxr_keyword">throw</strong> <strong class="jxr_keyword">new</strong> RuntimeException( e );
+<a class="jxr_linenumber" name="198" href="#198">198</a>                 }
+<a class="jxr_linenumber" name="199" href="#199">199</a>             }
+<a class="jxr_linenumber" name="200" href="#200">200</a>         };
+<a class="jxr_linenumber" name="201" href="#201">201</a> 
+<a class="jxr_linenumber" name="202" href="#202">202</a>         readTransactionsThread = <strong class="jxr_keyword">new</strong> Thread( readTransactionTask );
+<a class="jxr_linenumber" name="203" href="#203">203</a>         readTransactionsThread.setDaemon( <strong class="jxr_keyword">true</strong> );
+<a class="jxr_linenumber" name="204" href="#204">204</a>         readTransactionsThread.start();
+<a class="jxr_linenumber" name="205" href="#205">205</a>     }
+<a class="jxr_linenumber" name="206" href="#206">206</a> 
+<a class="jxr_linenumber" name="207" href="#207">207</a> 
+<a class="jxr_linenumber" name="208" href="#208">208</a>     <em class="jxr_javadoccomment">/**</em>
+<a class="jxr_linenumber" name="209" href="#209">209</a> <em class="jxr_javadoccomment">     * Create a thread that is responsible of writing the modifications in a journal.</em>
+<a class="jxr_linenumber" name="210" href="#210">210</a> <em class="jxr_javadoccomment">     * The journal will contain all the modifications in the order they have been applied</em>
+<a class="jxr_linenumber" name="211" href="#211">211</a> <em class="jxr_javadoccomment">     * to the BTree. We will store Insertions and Deletions. Those operations are injected</em>
+<a class="jxr_linenumber" name="212" href="#212">212</a> <em class="jxr_javadoccomment">     * into a queue, which is read by the thread.</em>
+<a class="jxr_linenumber" name="213" href="#213">213</a> <em class="jxr_javadoccomment">     */</em>
+<a class="jxr_linenumber" name="214" href="#214">214</a>     <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">void</strong> createJournalManager()
+<a class="jxr_linenumber" name="215" href="#215">215</a>     {
+<a class="jxr_linenumber" name="216" href="#216">216</a>         Runnable journalTask = <strong class="jxr_keyword">new</strong> Runnable()
+<a class="jxr_linenumber" name="217" href="#217">217</a>         {
+<a class="jxr_linenumber" name="218" href="#218">218</a>             <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">boolean</strong> flushModification( FileChannel channel, Modification&lt;K, V&gt; modification )
+<a class="jxr_linenumber" name="219" href="#219">219</a>                 <strong class="jxr_keyword">throws</strong> IOException
+<a class="jxr_linenumber" name="220" href="#220">220</a>             {
+<a class="jxr_linenumber" name="221" href="#221">221</a>                 <strong class="jxr_keyword">if</strong> ( modification instanceof Addition )
+<a class="jxr_linenumber" name="222" href="#222">222</a>                 {
+<a class="jxr_linenumber" name="223" href="#223">223</a>                     byte[] keyBuffer = keySerializer.serialize( modification.getKey() );
+<a class="jxr_linenumber" name="224" href="#224">224</a>                     ByteBuffer bb = ByteBuffer.allocateDirect( keyBuffer.length + 1 );
+<a class="jxr_linenumber" name="225" href="#225">225</a>                     bb.put( Modification.ADDITION );
+<a class="jxr_linenumber" name="226" href="#226">226</a>                     bb.put( keyBuffer );
+<a class="jxr_linenumber" name="227" href="#227">227</a>                     bb.flip();
+<a class="jxr_linenumber" name="228" href="#228">228</a> 
+<a class="jxr_linenumber" name="229" href="#229">229</a>                     channel.write( bb );
+<a class="jxr_linenumber" name="230" href="#230">230</a> 
+<a class="jxr_linenumber" name="231" href="#231">231</a>                     byte[] valueBuffer = valueSerializer.serialize( modification.getValue() );
+<a class="jxr_linenumber" name="232" href="#232">232</a>                     bb = ByteBuffer.allocateDirect( valueBuffer.length );
+<a class="jxr_linenumber" name="233" href="#233">233</a>                     bb.put( valueBuffer );
+<a class="jxr_linenumber" name="234" href="#234">234</a>                     bb.flip();
+<a class="jxr_linenumber" name="235" href="#235">235</a> 
+<a class="jxr_linenumber" name="236" href="#236">236</a>                     channel.write( bb );
+<a class="jxr_linenumber" name="237" href="#237">237</a>                 }
+<a class="jxr_linenumber" name="238" href="#238">238</a>                 <strong class="jxr_keyword">else</strong> <strong class="jxr_keyword">if</strong> ( modification instanceof Deletion )
+<a class="jxr_linenumber" name="239" href="#239">239</a>                 {
+<a class="jxr_linenumber" name="240" href="#240">240</a>                     byte[] keyBuffer = keySerializer.serialize( modification.getKey() );
+<a class="jxr_linenumber" name="241" href="#241">241</a>                     ByteBuffer bb = ByteBuffer.allocateDirect( keyBuffer.length + 1 );
+<a class="jxr_linenumber" name="242" href="#242">242</a>                     bb.put( Modification.DELETION );
+<a class="jxr_linenumber" name="243" href="#243">243</a>                     bb.put( keyBuffer );
+<a class="jxr_linenumber" name="244" href="#244">244</a>                     bb.flip();
+<a class="jxr_linenumber" name="245" href="#245">245</a> 
+<a class="jxr_linenumber" name="246" href="#246">246</a>                     channel.write( bb );
+<a class="jxr_linenumber" name="247" href="#247">247</a>                 }
+<a class="jxr_linenumber" name="248" href="#248">248</a>                 <strong class="jxr_keyword">else</strong>
+<a class="jxr_linenumber" name="249" href="#249">249</a>                 <em class="jxr_comment">// This is the poison pill, just exit</em>
+<a class="jxr_linenumber" name="250" href="#250">250</a>                 {
+<a class="jxr_linenumber" name="251" href="#251">251</a>                     <strong class="jxr_keyword">return</strong> false;
+<a class="jxr_linenumber" name="252" href="#252">252</a>                 }
+<a class="jxr_linenumber" name="253" href="#253">253</a> 
+<a class="jxr_linenumber" name="254" href="#254">254</a>                 <em class="jxr_comment">// Flush to the disk for real</em>
+<a class="jxr_linenumber" name="255" href="#255">255</a>                 channel.force( <strong class="jxr_keyword">true</strong> );
+<a class="jxr_linenumber" name="256" href="#256">256</a> 
+<a class="jxr_linenumber" name="257" href="#257">257</a>                 <strong class="jxr_keyword">return</strong> <strong class="jxr_keyword">true</strong>;
+<a class="jxr_linenumber" name="258" href="#258">258</a>             }
+<a class="jxr_linenumber" name="259" href="#259">259</a> 
+<a class="jxr_linenumber" name="260" href="#260">260</a> 
+<a class="jxr_linenumber" name="261" href="#261">261</a>             <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">void</strong> run()
+<a class="jxr_linenumber" name="262" href="#262">262</a>             {
+<a class="jxr_linenumber" name="263" href="#263">263</a>                 Modification&lt;K, V&gt; modification = <strong class="jxr_keyword">null</strong>;
+<a class="jxr_linenumber" name="264" href="#264">264</a>                 FileOutputStream stream;
+<a class="jxr_linenumber" name="265" href="#265">265</a>                 FileChannel channel = <strong class="jxr_keyword">null</strong>;
+<a class="jxr_linenumber" name="266" href="#266">266</a> 
+<a class="jxr_linenumber" name="267" href="#267">267</a>                 <strong class="jxr_keyword">try</strong>
+<a class="jxr_linenumber" name="268" href="#268">268</a>                 {
+<a class="jxr_linenumber" name="269" href="#269">269</a>                     stream = <strong class="jxr_keyword">new</strong> FileOutputStream( journal );
+<a class="jxr_linenumber" name="270" href="#270">270</a>                     channel = stream.getChannel();
+<a class="jxr_linenumber" name="271" href="#271">271</a> 
+<a class="jxr_linenumber" name="272" href="#272">272</a>                     <strong class="jxr_keyword">while</strong> ( !Thread.currentThread().isInterrupted() )
+<a class="jxr_linenumber" name="273" href="#273">273</a>                     {
+<a class="jxr_linenumber" name="274" href="#274">274</a>                         modification = modificationsQueue.take();
+<a class="jxr_linenumber" name="275" href="#275">275</a> 
+<a class="jxr_linenumber" name="276" href="#276">276</a>                         <strong class="jxr_keyword">boolean</strong> stop = flushModification( channel, modification );
+<a class="jxr_linenumber" name="277" href="#277">277</a> 
+<a class="jxr_linenumber" name="278" href="#278">278</a>                         <strong class="jxr_keyword">if</strong> ( stop )
+<a class="jxr_linenumber" name="279" href="#279">279</a>                         {
+<a class="jxr_linenumber" name="280" href="#280">280</a>                             <strong class="jxr_keyword">break</strong>;
+<a class="jxr_linenumber" name="281" href="#281">281</a>                         }
+<a class="jxr_linenumber" name="282" href="#282">282</a>                     }
+<a class="jxr_linenumber" name="283" href="#283">283</a>                 }
+<a class="jxr_linenumber" name="284" href="#284">284</a>                 <strong class="jxr_keyword">catch</strong> ( InterruptedException ie )
+<a class="jxr_linenumber" name="285" href="#285">285</a>                 {
+<a class="jxr_linenumber" name="286" href="#286">286</a>                     <em class="jxr_comment">//System.out.println( "Interrupted" );</em>
+<a class="jxr_linenumber" name="287" href="#287">287</a>                     <strong class="jxr_keyword">while</strong> ( ( modification = modificationsQueue.peek() ) != <strong class="jxr_keyword">null</strong> );
+<a class="jxr_linenumber" name="288" href="#288">288</a> 
+<a class="jxr_linenumber" name="289" href="#289">289</a>                     <strong class="jxr_keyword">try</strong>
+<a class="jxr_linenumber" name="290" href="#290">290</a>                     {
+<a class="jxr_linenumber" name="291" href="#291">291</a>                         flushModification( channel, modification );
+<a class="jxr_linenumber" name="292" href="#292">292</a>                     }
+<a class="jxr_linenumber" name="293" href="#293">293</a>                     <strong class="jxr_keyword">catch</strong> ( IOException ioe )
+<a class="jxr_linenumber" name="294" href="#294">294</a>                     {
+<a class="jxr_linenumber" name="295" href="#295">295</a>                         <em class="jxr_comment">// There is little we can do here...</em>
+<a class="jxr_linenumber" name="296" href="#296">296</a>                     }
+<a class="jxr_linenumber" name="297" href="#297">297</a>                 }
+<a class="jxr_linenumber" name="298" href="#298">298</a>                 <strong class="jxr_keyword">catch</strong> ( Exception e )
+<a class="jxr_linenumber" name="299" href="#299">299</a>                 {
+<a class="jxr_linenumber" name="300" href="#300">300</a>                     <strong class="jxr_keyword">throw</strong> <strong class="jxr_keyword">new</strong> RuntimeException( e );
+<a class="jxr_linenumber" name="301" href="#301">301</a>                 }
+<a class="jxr_linenumber" name="302" href="#302">302</a>             }
+<a class="jxr_linenumber" name="303" href="#303">303</a>         };
+<a class="jxr_linenumber" name="304" href="#304">304</a> 
+<a class="jxr_linenumber" name="305" href="#305">305</a>         journalManagerThread = <strong class="jxr_keyword">new</strong> Thread( journalTask );
+<a class="jxr_linenumber" name="306" href="#306">306</a>         journalManagerThread.setDaemon( <strong class="jxr_keyword">true</strong> );
+<a class="jxr_linenumber" name="307" href="#307">307</a>         journalManagerThread.start();
+<a class="jxr_linenumber" name="308" href="#308">308</a>     }
+<a class="jxr_linenumber" name="309" href="#309">309</a> 
+<a class="jxr_linenumber" name="310" href="#310">310</a> 
+<a class="jxr_linenumber" name="311" href="#311">311</a>     <em class="jxr_javadoccomment">/**</em>
+<a class="jxr_linenumber" name="312" href="#312">312</a> <em class="jxr_javadoccomment">     * Creates a new BTree, with no initialization. </em>
+<a class="jxr_linenumber" name="313" href="#313">313</a> <em class="jxr_javadoccomment">     */</em>
+<a class="jxr_linenumber" name="314" href="#314">314</a>     <strong class="jxr_keyword">public</strong> <a href="../../../../../org/apache/directory/mavibot/btree/BTree.html">BTree</a>()
+<a class="jxr_linenumber" name="315" href="#315">315</a>     {
+<a class="jxr_linenumber" name="316" href="#316">316</a>         btreeHeader = <strong class="jxr_keyword">new</strong> <a href="../../../../../org/apache/directory/mavibot/btree/BTreeHeader.html">BTreeHeader</a>();
+<a class="jxr_linenumber" name="317" href="#317">317</a>         type = BTreeTypeEnum.MANAGED;
+<a class="jxr_linenumber" name="318" href="#318">318</a>     }
+<a class="jxr_linenumber" name="319" href="#319">319</a> 
+<a class="jxr_linenumber" name="320" href="#320">320</a> 
+<a class="jxr_linenumber" name="321" href="#321">321</a>     <em class="jxr_javadoccomment">/**</em>
+<a class="jxr_linenumber" name="322" href="#322">322</a> <em class="jxr_javadoccomment">     * Creates a new in-memory BTree using the BTreeConfiguration to initialize the </em>
+<a class="jxr_linenumber" name="323" href="#323">323</a> <em class="jxr_javadoccomment">     * BTree</em>
+<a class="jxr_linenumber" name="324" href="#324">324</a> <em class="jxr_javadoccomment">     * </em>
+<a class="jxr_linenumber" name="325" href="#325">325</a> <em class="jxr_javadoccomment">     * @param comparator The comparator to use</em>
+<a class="jxr_linenumber" name="326" href="#326">326</a> <em class="jxr_javadoccomment">     */</em>
+<a class="jxr_linenumber" name="327" href="#327">327</a>     <strong class="jxr_keyword">public</strong> <a href="../../../../../org/apache/directory/mavibot/btree/BTree.html">BTree</a>( BTreeConfiguration&lt;K, V&gt; configuration ) <strong class="jxr_keyword">throws</strong> IOException
+<a class="jxr_linenumber" name="328" href="#328">328</a>     {
+<a class="jxr_linenumber" name="329" href="#329">329</a>         String name = configuration.getName();
+<a class="jxr_linenumber" name="330" href="#330">330</a> 
+<a class="jxr_linenumber" name="331" href="#331">331</a>         <strong class="jxr_keyword">if</strong> ( name == <strong class="jxr_keyword">null</strong> )
+<a class="jxr_linenumber" name="332" href="#332">332</a>         {
+<a class="jxr_linenumber" name="333" href="#333">333</a>             <strong class="jxr_keyword">throw</strong> <strong class="jxr_keyword">new</strong> IllegalArgumentException( <span class="jxr_string">"BTree name cannot be null"</span> );
+<a class="jxr_linenumber" name="334" href="#334">334</a>         }
+<a class="jxr_linenumber" name="335" href="#335">335</a> 
+<a class="jxr_linenumber" name="336" href="#336">336</a>         String filePath = configuration.getFilePath();
+<a class="jxr_linenumber" name="337" href="#337">337</a> 
+<a class="jxr_linenumber" name="338" href="#338">338</a>         <strong class="jxr_keyword">if</strong> ( filePath != <strong class="jxr_keyword">null</strong> )
+<a class="jxr_linenumber" name="339" href="#339">339</a>         {
+<a class="jxr_linenumber" name="340" href="#340">340</a>             envDir = <strong class="jxr_keyword">new</strong> File( filePath );
+<a class="jxr_linenumber" name="341" href="#341">341</a>         }
+<a class="jxr_linenumber" name="342" href="#342">342</a> 
+<a class="jxr_linenumber" name="343" href="#343">343</a>         btreeHeader = <strong class="jxr_keyword">new</strong> <a href="../../../../../org/apache/directory/mavibot/btree/BTreeHeader.html">BTreeHeader</a>();
+<a class="jxr_linenumber" name="344" href="#344">344</a>         btreeHeader.setName( name );
+<a class="jxr_linenumber" name="345" href="#345">345</a>         btreeHeader.setPageSize( configuration.getPageSize() );
+<a class="jxr_linenumber" name="346" href="#346">346</a> 
+<a class="jxr_linenumber" name="347" href="#347">347</a>         keySerializer = configuration.getKeySerializer();
+<a class="jxr_linenumber" name="348" href="#348">348</a>         btreeHeader.setKeySerializerFQCN( keySerializer.getClass().getName() );
+<a class="jxr_linenumber" name="349" href="#349">349</a> 
+<a class="jxr_linenumber" name="350" href="#350">350</a>         valueSerializer = configuration.getValueSerializer();
+<a class="jxr_linenumber" name="351" href="#351">351</a>         btreeHeader.setValueSerializerFQCN( valueSerializer.getClass().getName() );
+<a class="jxr_linenumber" name="352" href="#352">352</a> 
+<a class="jxr_linenumber" name="353" href="#353">353</a>         comparator = keySerializer.getComparator();
+<a class="jxr_linenumber" name="354" href="#354">354</a>         readTimeOut = configuration.getReadTimeOut();
+<a class="jxr_linenumber" name="355" href="#355">355</a>         writeBufferSize = configuration.getWriteBufferSize();
+<a class="jxr_linenumber" name="356" href="#356">356</a>         btreeHeader.setAllowDuplicates( configuration.isAllowDuplicates() );
+<a class="jxr_linenumber" name="357" href="#357">357</a>         type = configuration.getType();
+<a class="jxr_linenumber" name="358" href="#358">358</a> 
+<a class="jxr_linenumber" name="359" href="#359">359</a>         <strong class="jxr_keyword">if</strong> ( comparator == <strong class="jxr_keyword">null</strong> )
+<a class="jxr_linenumber" name="360" href="#360">360</a>         {
+<a class="jxr_linenumber" name="361" href="#361">361</a>             <strong class="jxr_keyword">throw</strong> <strong class="jxr_keyword">new</strong> IllegalArgumentException( <span class="jxr_string">"Comparator should not be null"</span> );
+<a class="jxr_linenumber" name="362" href="#362">362</a>         }
+<a class="jxr_linenumber" name="363" href="#363">363</a> 
+<a class="jxr_linenumber" name="364" href="#364">364</a>         <em class="jxr_comment">// Create the first root page, with revision 0L. It will be empty</em>
+<a class="jxr_linenumber" name="365" href="#365">365</a>         <em class="jxr_comment">// and increment the revision at the same time</em>
+<a class="jxr_linenumber" name="366" href="#366">366</a>         rootPage = <strong class="jxr_keyword">new</strong> Leaf&lt;K, V&gt;( <strong class="jxr_keyword">this</strong> );
+<a class="jxr_linenumber" name="367" href="#367">367</a> 
+<a class="jxr_linenumber" name="368" href="#368">368</a>         <em class="jxr_comment">// Now, initialize the BTree</em>
+<a class="jxr_linenumber" name="369" href="#369">369</a>         init();
+<a class="jxr_linenumber" name="370" href="#370">370</a>     }
+<a class="jxr_linenumber" name="371" href="#371">371</a> 
+<a class="jxr_linenumber" name="372" href="#372">372</a> 
+<a class="jxr_linenumber" name="373" href="#373">373</a>     <em class="jxr_javadoccomment">/**</em>
+<a class="jxr_linenumber" name="374" href="#374">374</a> <em class="jxr_javadoccomment">     * Creates a new in-memory BTree with a default page size and key/value serializers.</em>
+<a class="jxr_linenumber" name="375" href="#375">375</a> <em class="jxr_javadoccomment">     * </em>
+<a class="jxr_linenumber" name="376" href="#376">376</a> <em class="jxr_javadoccomment">     * @param comparator The comparator to use</em>
+<a class="jxr_linenumber" name="377" href="#377">377</a> <em class="jxr_javadoccomment">     */</em>
+<a class="jxr_linenumber" name="378" href="#378">378</a>     <strong class="jxr_keyword">public</strong> <a href="../../../../../org/apache/directory/mavibot/btree/BTree.html">BTree</a>( String name, ElementSerializer&lt;K&gt; keySerializer, ElementSerializer&lt;V&gt; valueSerializer )
+<a class="jxr_linenumber" name="379" href="#379">379</a>         <strong class="jxr_keyword">throws</strong> IOException
+<a class="jxr_linenumber" name="380" href="#380">380</a>     {
+<a class="jxr_linenumber" name="381" href="#381">381</a>         <strong class="jxr_keyword">this</strong>( name, keySerializer, valueSerializer, false );
+<a class="jxr_linenumber" name="382" href="#382">382</a>     }
+<a class="jxr_linenumber" name="383" href="#383">383</a> 
+<a class="jxr_linenumber" name="384" href="#384">384</a> 
+<a class="jxr_linenumber" name="385" href="#385">385</a>     <strong class="jxr_keyword">public</strong> <a href="../../../../../org/apache/directory/mavibot/btree/BTree.html">BTree</a>( String name, ElementSerializer&lt;K&gt; keySerializer, ElementSerializer&lt;V&gt; valueSerializer,
+<a class="jxr_linenumber" name="386" href="#386">386</a>         <strong class="jxr_keyword">boolean</strong> allowDuplicates )
+<a class="jxr_linenumber" name="387" href="#387">387</a>         <strong class="jxr_keyword">throws</strong> IOException
+<a class="jxr_linenumber" name="388" href="#388">388</a>     {
+<a class="jxr_linenumber" name="389" href="#389">389</a>         <strong class="jxr_keyword">this</strong>( name, <strong class="jxr_keyword">null</strong>, keySerializer, valueSerializer, DEFAULT_PAGE_SIZE, allowDuplicates );
+<a class="jxr_linenumber" name="390" href="#390">390</a>     }
+<a class="jxr_linenumber" name="391" href="#391">391</a> 
+<a class="jxr_linenumber" name="392" href="#392">392</a> 
+<a class="jxr_linenumber" name="393" href="#393">393</a>     <em class="jxr_javadoccomment">/**</em>
+<a class="jxr_linenumber" name="394" href="#394">394</a> <em class="jxr_javadoccomment">     * Creates a new in-memory BTree with a default page size and key/value serializers.</em>
+<a class="jxr_linenumber" name="395" href="#395">395</a> <em class="jxr_javadoccomment">     * </em>
+<a class="jxr_linenumber" name="396" href="#396">396</a> <em class="jxr_javadoccomment">     * @param comparator The comparator to use</em>
+<a class="jxr_linenumber" name="397" href="#397">397</a> <em class="jxr_javadoccomment">     */</em>
+<a class="jxr_linenumber" name="398" href="#398">398</a>     <strong class="jxr_keyword">public</strong> <a href="../../../../../org/apache/directory/mavibot/btree/BTree.html">BTree</a>( String name, ElementSerializer&lt;K&gt; keySerializer, ElementSerializer&lt;V&gt; valueSerializer, <strong class="jxr_keyword">int</strong> pageSize )
+<a class="jxr_linenumber" name="399" href="#399">399</a>         <strong class="jxr_keyword">throws</strong> IOException
+<a class="jxr_linenumber" name="400" href="#400">400</a>     {
+<a class="jxr_linenumber" name="401" href="#401">401</a>         <strong class="jxr_keyword">this</strong>( name, <strong class="jxr_keyword">null</strong>, keySerializer, valueSerializer, pageSize );
+<a class="jxr_linenumber" name="402" href="#402">402</a>     }
+<a class="jxr_linenumber" name="403" href="#403">403</a> 
+<a class="jxr_linenumber" name="404" href="#404">404</a> 
+<a class="jxr_linenumber" name="405" href="#405">405</a>     <em class="jxr_javadoccomment">/**</em>
+<a class="jxr_linenumber" name="406" href="#406">406</a> <em class="jxr_javadoccomment">     * Creates a new BTree with a default page size and a comparator, with an associated file.</em>
+<a class="jxr_linenumber" name="407" href="#407">407</a> <em class="jxr_javadoccomment">     * @param comparator The comparator to use</em>
+<a class="jxr_linenumber" name="408" href="#408">408</a> <em class="jxr_javadoccomment">     * @param serializer The serializer to use</em>
+<a class="jxr_linenumber" name="409" href="#409">409</a> <em class="jxr_javadoccomment">     */</em>
+<a class="jxr_linenumber" name="410" href="#410">410</a>     <strong class="jxr_keyword">public</strong> <a href="../../../../../org/apache/directory/mavibot/btree/BTree.html">BTree</a>( String name, String path, ElementSerializer&lt;K&gt; keySerializer, ElementSerializer&lt;V&gt; valueSerializer )
+<a class="jxr_linenumber" name="411" href="#411">411</a>         <strong class="jxr_keyword">throws</strong> IOException
+<a class="jxr_linenumber" name="412" href="#412">412</a>     {
+<a class="jxr_linenumber" name="413" href="#413">413</a>         <strong class="jxr_keyword">this</strong>( name, path, keySerializer, valueSerializer, DEFAULT_PAGE_SIZE );
+<a class="jxr_linenumber" name="414" href="#414">414</a>     }
+<a class="jxr_linenumber" name="415" href="#415">415</a> 
+<a class="jxr_linenumber" name="416" href="#416">416</a> 
+<a class="jxr_linenumber" name="417" href="#417">417</a>     <em class="jxr_javadoccomment">/**</em>
+<a class="jxr_linenumber" name="418" href="#418">418</a> <em class="jxr_javadoccomment">     * </em>
+<a class="jxr_linenumber" name="419" href="#419">419</a> <em class="jxr_javadoccomment">     * Creates a new instance of BTree with the given name and store it under the given dataDir if provided.</em>
+<a class="jxr_linenumber" name="420" href="#420">420</a> <em class="jxr_javadoccomment">     *</em>
+<a class="jxr_linenumber" name="421" href="#421">421</a> <em class="jxr_javadoccomment">     * @param name the name of the BTree</em>
+<a class="jxr_linenumber" name="422" href="#422">422</a> <em class="jxr_javadoccomment">     * @param dataDir the name of the data directory with absolute path</em>
+<a class="jxr_linenumber" name="423" href="#423">423</a> <em class="jxr_javadoccomment">     * @param keySerializer key serializer</em>
+<a class="jxr_linenumber" name="424" href="#424">424</a> <em class="jxr_javadoccomment">     * @param valueSerializer value serializer</em>
+<a class="jxr_linenumber" name="425" href="#425">425</a> <em class="jxr_javadoccomment">     * @param pageSize size of the page</em>
+<a class="jxr_linenumber" name="426" href="#426">426</a> <em class="jxr_javadoccomment">     * @throws IOException</em>
+<a class="jxr_linenumber" name="427" href="#427">427</a> <em class="jxr_javadoccomment">     */</em>
+<a class="jxr_linenumber" name="428" href="#428">428</a>     <strong class="jxr_keyword">public</strong> <a href="../../../../../org/apache/directory/mavibot/btree/BTree.html">BTree</a>( String name, String dataDir, ElementSerializer&lt;K&gt; keySerializer,
+<a class="jxr_linenumber" name="429" href="#429">429</a>         ElementSerializer&lt;V&gt; valueSerializer,
+<a class="jxr_linenumber" name="430" href="#430">430</a>         <strong class="jxr_keyword">int</strong> pageSize )
+<a class="jxr_linenumber" name="431" href="#431">431</a>         <strong class="jxr_keyword">throws</strong> IOException
+<a class="jxr_linenumber" name="432" href="#432">432</a>     {
+<a class="jxr_linenumber" name="433" href="#433">433</a>         <strong class="jxr_keyword">this</strong>( name, dataDir, keySerializer, valueSerializer, pageSize, false );
+<a class="jxr_linenumber" name="434" href="#434">434</a>     }
+<a class="jxr_linenumber" name="435" href="#435">435</a> 
+<a class="jxr_linenumber" name="436" href="#436">436</a> 
+<a class="jxr_linenumber" name="437" href="#437">437</a>     <strong class="jxr_keyword">public</strong> <a href="../../../../../org/apache/directory/mavibot/btree/BTree.html">BTree</a>( String name, String dataDir, ElementSerializer&lt;K&gt; keySerializer,
+<a class="jxr_linenumber" name="438" href="#438">438</a>         ElementSerializer&lt;V&gt; valueSerializer,
+<a class="jxr_linenumber" name="439" href="#439">439</a>         <strong class="jxr_keyword">int</strong> pageSize, <strong class="jxr_keyword">boolean</strong> allowDuplicates )
+<a class="jxr_linenumber" name="440" href="#440">440</a>         <strong class="jxr_keyword">throws</strong> IOException
+<a class="jxr_linenumber" name="441" href="#441">441</a>     {
+<a class="jxr_linenumber" name="442" href="#442">442</a>         btreeHeader = <strong class="jxr_keyword">new</strong> <a href="../../../../../org/apache/directory/mavibot/btree/BTreeHeader.html">BTreeHeader</a>();
+<a class="jxr_linenumber" name="443" href="#443">443</a>         btreeHeader.setName( name );
+<a class="jxr_linenumber" name="444" href="#444">444</a>         <strong class="jxr_keyword">if</strong> ( dataDir != <strong class="jxr_keyword">null</strong> )
+<a class="jxr_linenumber" name="445" href="#445">445</a>         {
+<a class="jxr_linenumber" name="446" href="#446">446</a>             envDir = <strong class="jxr_keyword">new</strong> File( dataDir );
+<a class="jxr_linenumber" name="447" href="#447">447</a>         }
+<a class="jxr_linenumber" name="448" href="#448">448</a> 
+<a class="jxr_linenumber" name="449" href="#449">449</a>         setPageSize( pageSize );
+<a class="jxr_linenumber" name="450" href="#450">450</a>         writeBufferSize = DEFAULT_WRITE_BUFFER_SIZE;
+<a class="jxr_linenumber" name="451" href="#451">451</a> 
+<a class="jxr_linenumber" name="452" href="#452">452</a>         <strong class="jxr_keyword">this</strong>.keySerializer = keySerializer;
+<a class="jxr_linenumber" name="453" href="#453">453</a> 
+<a class="jxr_linenumber" name="454" href="#454">454</a>         btreeHeader.setKeySerializerFQCN( keySerializer.getClass().getName() );
+<a class="jxr_linenumber" name="455" href="#455">455</a> 
+<a class="jxr_linenumber" name="456" href="#456">456</a>         <strong class="jxr_keyword">this</strong>.valueSerializer = valueSerializer;
+<a class="jxr_linenumber" name="457" href="#457">457</a> 
+<a class="jxr_linenumber" name="458" href="#458">458</a>         btreeHeader.setValueSerializerFQCN( valueSerializer.getClass().getName() );
+<a class="jxr_linenumber" name="459" href="#459">459</a> 
+<a class="jxr_linenumber" name="460" href="#460">460</a>         comparator = keySerializer.getComparator();
+<a class="jxr_linenumber" name="461" href="#461">461</a> 
+<a class="jxr_linenumber" name="462" href="#462">462</a>         btreeHeader.setAllowDuplicates( allowDuplicates );
+<a class="jxr_linenumber" name="463" href="#463">463</a> 
+<a class="jxr_linenumber" name="464" href="#464">464</a>         <em class="jxr_comment">// Create the first root page, with revision 0L. It will be empty</em>
+<a class="jxr_linenumber" name="465" href="#465">465</a>         <em class="jxr_comment">// and increment the revision at the same time</em>
+<a class="jxr_linenumber" name="466" href="#466">466</a>         rootPage = <strong class="jxr_keyword">new</strong> Leaf&lt;K, V&gt;( <strong class="jxr_keyword">this</strong> );
+<a class="jxr_linenumber" name="467" href="#467">467</a> 
+<a class="jxr_linenumber" name="468" href="#468">468</a>         <em class="jxr_comment">// Now, call the init() method</em>
+<a class="jxr_linenumber" name="469" href="#469">469</a>         init();
+<a class="jxr_linenumber" name="470" href="#470">470</a>     }
+<a class="jxr_linenumber" name="471" href="#471">471</a> 
+<a class="jxr_linenumber" name="472" href="#472">472</a> 
+<a class="jxr_linenumber" name="473" href="#473">473</a>     <em class="jxr_javadoccomment">/**</em>
+<a class="jxr_linenumber" name="474" href="#474">474</a> <em class="jxr_javadoccomment">     * Initialize the BTree.</em>
+<a class="jxr_linenumber" name="475" href="#475">475</a> <em class="jxr_javadoccomment">     * </em>
+<a class="jxr_linenumber" name="476" href="#476">476</a> <em class="jxr_javadoccomment">     * @throws IOException If we get some exception while initializing the BTree</em>
+<a class="jxr_linenumber" name="477" href="#477">477</a> <em class="jxr_javadoccomment">     */</em>
+<a class="jxr_linenumber" name="478" href="#478">478</a>     <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">void</strong> init() <strong class="jxr_keyword">throws</strong> IOException
+<a class="jxr_linenumber" name="479" href="#479">479</a>     {
+<a class="jxr_linenumber" name="480" href="#480">480</a>         <em class="jxr_comment">// if not in-memory then default to persist mode instead of managed</em>
+<a class="jxr_linenumber" name="481" href="#481">481</a>         <strong class="jxr_keyword">if</strong> ( ( envDir != <strong class="jxr_keyword">null</strong> ) &amp;&amp; ( type != BTreeTypeEnum.MANAGED ) )
+<a class="jxr_linenumber" name="482" href="#482">482</a>         {
+<a class="jxr_linenumber" name="483" href="#483">483</a>             <strong class="jxr_keyword">if</strong> ( !envDir.exists() )
+<a class="jxr_linenumber" name="484" href="#484">484</a>             {
+<a class="jxr_linenumber" name="485" href="#485">485</a>                 <strong class="jxr_keyword">boolean</strong> created = envDir.mkdirs();
+<a class="jxr_linenumber" name="486" href="#486">486</a>                 <strong class="jxr_keyword">if</strong> ( !created )
+<a class="jxr_linenumber" name="487" href="#487">487</a>                 {
+<a class="jxr_linenumber" name="488" href="#488">488</a>                     <strong class="jxr_keyword">throw</strong> <strong class="jxr_keyword">new</strong> IllegalStateException( <span class="jxr_string">"Could not create the directory "</span> + envDir + <span class="jxr_string">" for storing data"</span> );
+<a class="jxr_linenumber" name="489" href="#489">489</a>                 }
+<a class="jxr_linenumber" name="490" href="#490">490</a>             }
+<a class="jxr_linenumber" name="491" href="#491">491</a> 
+<a class="jxr_linenumber" name="492" href="#492">492</a>             <strong class="jxr_keyword">this</strong>.file = <strong class="jxr_keyword">new</strong> File( envDir, btreeHeader.getName() + DATA_SUFFIX );
+<a class="jxr_linenumber" name="493" href="#493">493</a> 
+<a class="jxr_linenumber" name="494" href="#494">494</a>             <strong class="jxr_keyword">this</strong>.journal = <strong class="jxr_keyword">new</strong> File( envDir, file.getName() + JOURNAL_SUFFIX );
+<a class="jxr_linenumber" name="495" href="#495">495</a>             type = BTreeTypeEnum.PERSISTENT;
+<a class="jxr_linenumber" name="496" href="#496">496</a>         }
+<a class="jxr_linenumber" name="497" href="#497">497</a> 
+<a class="jxr_linenumber" name="498" href="#498">498</a>         <em class="jxr_comment">// Create the queue containing the pending read transactions</em>
+<a class="jxr_linenumber" name="499" href="#499">499</a>         readTransactions = <strong class="jxr_keyword">new</strong> ConcurrentLinkedQueue&lt;Transaction&lt;K, V&gt;&gt;();
+<a class="jxr_linenumber" name="500" href="#500">500</a> 
+<a class="jxr_linenumber" name="501" href="#501">501</a>         <em class="jxr_comment">// We will extract the Type to use for keys, using the comparator for that</em>
+<a class="jxr_linenumber" name="502" href="#502">502</a>         Class&lt;?&gt; comparatorClass = comparator.getClass();
+<a class="jxr_linenumber" name="503" href="#503">503</a>         Type[] types = comparatorClass.getGenericInterfaces();
+<a class="jxr_linenumber" name="504" href="#504">504</a> 
+<a class="jxr_linenumber" name="505" href="#505">505</a>         <strong class="jxr_keyword">if</strong> ( types[0] instanceof Class )
+<a class="jxr_linenumber" name="506" href="#506">506</a>         {
+<a class="jxr_linenumber" name="507" href="#507">507</a>             keyType = ( Class&lt;?&gt; ) types[0];
+<a class="jxr_linenumber" name="508" href="#508">508</a>         }
+<a class="jxr_linenumber" name="509" href="#509">509</a>         <strong class="jxr_keyword">else</strong>
+<a class="jxr_linenumber" name="510" href="#510">510</a>         {
+<a class="jxr_linenumber" name="511" href="#511">511</a>             Type[] argumentTypes = ( ( ParameterizedType ) types[0] ).getActualTypeArguments();
+<a class="jxr_linenumber" name="512" href="#512">512</a> 
+<a class="jxr_linenumber" name="513" href="#513">513</a>             <strong class="jxr_keyword">if</strong> ( ( argumentTypes != <strong class="jxr_keyword">null</strong> ) &amp;&amp; ( argumentTypes.length &gt; 0 ) &amp;&amp; ( argumentTypes[0] instanceof Class&lt;?&gt; ) )
+<a class="jxr_linenumber" name="514" href="#514">514</a>             {
+<a class="jxr_linenumber" name="515" href="#515">515</a>                 keyType = ( Class&lt;?&gt; ) argumentTypes[0];
+<a class="jxr_linenumber" name="516" href="#516">516</a>             }
+<a class="jxr_linenumber" name="517" href="#517">517</a>         }
+<a class="jxr_linenumber" name="518" href="#518">518</a> 
+<a class="jxr_linenumber" name="519" href="#519">519</a>         writeLock = <strong class="jxr_keyword">new</strong> ReentrantLock();
+<a class="jxr_linenumber" name="520" href="#520">520</a> 
+<a class="jxr_linenumber" name="521" href="#521">521</a>         <em class="jxr_comment">// Check the files and create them if missing</em>
+<a class="jxr_linenumber" name="522" href="#522">522</a>         <em class="jxr_comment">// Create the queue containing the modifications, if it's not a in-memory btree</em>
+<a class="jxr_linenumber" name="523" href="#523">523</a>         <strong class="jxr_keyword">if</strong> ( type == BTreeTypeEnum.PERSISTENT )
+<a class="jxr_linenumber" name="524" href="#524">524</a>         {
+<a class="jxr_linenumber" name="525" href="#525">525</a>             modificationsQueue = <strong class="jxr_keyword">new</strong> LinkedBlockingDeque&lt;Modification&lt;K, V&gt;&gt;();
+<a class="jxr_linenumber" name="526" href="#526">526</a> 
+<a class="jxr_linenumber" name="527" href="#527">527</a>             <strong class="jxr_keyword">if</strong> ( file.length() &gt; 0 )
+<a class="jxr_linenumber" name="528" href="#528">528</a>             {
+<a class="jxr_linenumber" name="529" href="#529">529</a>                 <em class="jxr_comment">// We have some existing file, load it </em>
+<a class="jxr_linenumber" name="530" href="#530">530</a>                 load( file );
+<a class="jxr_linenumber" name="531" href="#531">531</a>             }
+<a class="jxr_linenumber" name="532" href="#532">532</a> 
+<a class="jxr_linenumber" name="533" href="#533">533</a>             withJournal = <strong class="jxr_keyword">true</strong>;
+<a class="jxr_linenumber" name="534" href="#534">534</a> 
+<a class="jxr_linenumber" name="535" href="#535">535</a>             <em class="jxr_comment">// If the journal is not empty, we have to read it</em>
+<a class="jxr_linenumber" name="536" href="#536">536</a>             <em class="jxr_comment">// and to apply all the modifications to the current file</em>
+<a class="jxr_linenumber" name="537" href="#537">537</a>             <strong class="jxr_keyword">if</strong> ( journal.length() &gt; 0 )
+<a class="jxr_linenumber" name="538" href="#538">538</a>             {
+<a class="jxr_linenumber" name="539" href="#539">539</a>                 applyJournal();
+<a class="jxr_linenumber" name="540" href="#540">540</a>             }
+<a class="jxr_linenumber" name="541" href="#541">541</a> 
+<a class="jxr_linenumber" name="542" href="#542">542</a>             <em class="jxr_comment">// Initialize the Journal manager thread if it's not a in-memory btree</em>
+<a class="jxr_linenumber" name="543" href="#543">543</a>             createJournalManager();
+<a class="jxr_linenumber" name="544" href="#544">544</a>         }
+<a class="jxr_linenumber" name="545" href="#545">545</a>         <strong class="jxr_keyword">else</strong> <strong class="jxr_keyword">if</strong> ( type == <strong class="jxr_keyword">null</strong> )
+<a class="jxr_linenumber" name="546" href="#546">546</a>         {
+<a class="jxr_linenumber" name="547" href="#547">547</a>             type = BTreeTypeEnum.IN_MEMORY;
+<a class="jxr_linenumber" name="548" href="#548">548</a>         }
+<a class="jxr_linenumber" name="549" href="#549">549</a> 
+<a class="jxr_linenumber" name="550" href="#550">550</a>         <em class="jxr_comment">// Initialize the txnManager thread</em>
+<a class="jxr_linenumber" name="551" href="#551">551</a>         <em class="jxr_comment">//FIXME we should NOT create a new transaction manager thread for each BTree</em>
+<a class="jxr_linenumber" name="552" href="#552">552</a>         <em class="jxr_comment">//createTransactionManager();</em>
+<a class="jxr_linenumber" name="553" href="#553">553</a>     }
+<a class="jxr_linenumber" name="554" href="#554">554</a> 
+<a class="jxr_linenumber" name="555" href="#555">555</a> 
+<a class="jxr_linenumber" name="556" href="#556">556</a>     <em class="jxr_javadoccomment">/**</em>
+<a class="jxr_linenumber" name="557" href="#557">557</a> <em class="jxr_javadoccomment">     * Close the BTree, cleaning up all the data structure</em>
+<a class="jxr_linenumber" name="558" href="#558">558</a> <em class="jxr_javadoccomment">     */</em>
+<a class="jxr_linenumber" name="559" href="#559">559</a>     <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">void</strong> close() <strong class="jxr_keyword">throws</strong> IOException
+<a class="jxr_linenumber" name="560" href="#560">560</a>     {
+<a class="jxr_linenumber" name="561" href="#561">561</a>         <em class="jxr_comment">// Stop the readTransaction thread</em>
+<a class="jxr_linenumber" name="562" href="#562">562</a>         <em class="jxr_comment">// readTransactionsThread.interrupt();</em>
+<a class="jxr_linenumber" name="563" href="#563">563</a>         <em class="jxr_comment">// readTransactions.clear();</em>
+<a class="jxr_linenumber" name="564" href="#564">564</a> 
+<a class="jxr_linenumber" name="565" href="#565">565</a>         <strong class="jxr_keyword">if</strong> ( type == BTreeTypeEnum.PERSISTENT )
+<a class="jxr_linenumber" name="566" href="#566">566</a>         {
+<a class="jxr_linenumber" name="567" href="#567">567</a>             <em class="jxr_comment">// Stop the journal manager thread, by injecting a poison pill into</em>
+<a class="jxr_linenumber" name="568" href="#568">568</a>             <em class="jxr_comment">// the queue this thread is using, so that all the epnding data</em>
+<a class="jxr_linenumber" name="569" href="#569">569</a>             <em class="jxr_comment">// will be written before it shuts down</em>
+<a class="jxr_linenumber" name="570" href="#570">570</a>             modificationsQueue.add( <strong class="jxr_keyword">new</strong> PoisonPill&lt;K, V&gt;() );
+<a class="jxr_linenumber" name="571" href="#571">571</a> 
+<a class="jxr_linenumber" name="572" href="#572">572</a>             <em class="jxr_comment">// Flush the data</em>
+<a class="jxr_linenumber" name="573" href="#573">573</a>             flush();
+<a class="jxr_linenumber" name="574" href="#574">574</a>         }
+<a class="jxr_linenumber" name="575" href="#575">575</a> 
+<a class="jxr_linenumber" name="576" href="#576">576</a>         rootPage = <strong class="jxr_keyword">null</strong>;
+<a class="jxr_linenumber" name="577" href="#577">577</a>     }
+<a class="jxr_linenumber" name="578" href="#578">578</a> 
+<a class="jxr_linenumber" name="579" href="#579">579</a> 
+<a class="jxr_linenumber" name="580" href="#580">580</a>     <em class="jxr_javadoccomment">/**</em>
+<a class="jxr_linenumber" name="581" href="#581">581</a> <em class="jxr_javadoccomment">     * @return the btreeOffset</em>
+<a class="jxr_linenumber" name="582" href="#582">582</a> <em class="jxr_javadoccomment">     */</em>
+<a class="jxr_linenumber" name="583" href="#583">583</a>     <em class="jxr_comment">/*<em class="jxr_comment"> No qualifier*/</em><strong class="jxr_keyword">long</strong> getBtreeOffset()</em>
+<a class="jxr_linenumber" name="584" href="#584">584</a>     {
+<a class="jxr_linenumber" name="585" href="#585">585</a>         <strong class="jxr_keyword">return</strong> btreeHeader.getBTreeOffset();
+<a class="jxr_linenumber" name="586" href="#586">586</a>     }
+<a class="jxr_linenumber" name="587" href="#587">587</a> 
+<a class="jxr_linenumber" name="588" href="#588">588</a> 
+<a class="jxr_linenumber" name="589" href="#589">589</a>     <em class="jxr_javadoccomment">/**</em>
+<a class="jxr_linenumber" name="590" href="#590">590</a> <em class="jxr_javadoccomment">     * @param btreeOffset the btreeOffset to set</em>
+<a class="jxr_linenumber" name="591" href="#591">591</a> <em class="jxr_javadoccomment">     */</em>
+<a class="jxr_linenumber" name="592" href="#592">592</a>     <em class="jxr_comment">/*<em class="jxr_comment"> No qualifier*/</em><strong class="jxr_keyword">void</strong> setBtreeOffset( <strong class="jxr_keyword">long</strong> btreeOffset )</em>
+<a class="jxr_linenumber" name="593" href="#593">593</a>     {
+<a class="jxr_linenumber" name="594" href="#594">594</a>         btreeHeader.setBTreeOffset( btreeOffset );
+<a class="jxr_linenumber" name="595" href="#595">595</a>     }
+<a class="jxr_linenumber" name="596" href="#596">596</a> 
+<a class="jxr_linenumber" name="597" href="#597">597</a> 
+<a class="jxr_linenumber" name="598" href="#598">598</a>     <em class="jxr_javadoccomment">/**</em>
+<a class="jxr_linenumber" name="599" href="#599">599</a> <em class="jxr_javadoccomment">     * @return the rootPageOffset</em>
+<a class="jxr_linenumber" name="600" href="#600">600</a> <em class="jxr_javadoccomment">     */</em>
+<a class="jxr_linenumber" name="601" href="#601">601</a>     <em class="jxr_comment">/*<em class="jxr_comment"> No qualifier*/</em><strong class="jxr_keyword">long</strong> getRootPageOffset()</em>
+<a class="jxr_linenumber" name="602" href="#602">602</a>     {
+<a class="jxr_linenumber" name="603" href="#603">603</a>         <strong class="jxr_keyword">return</strong> btreeHeader.getRootPageOffset();
+<a class="jxr_linenumber" name="604" href="#604">604</a>     }
+<a class="jxr_linenumber" name="605" href="#605">605</a> 
+<a class="jxr_linenumber" name="606" href="#606">606</a> 
+<a class="jxr_linenumber" name="607" href="#607">607</a>     <em class="jxr_javadoccomment">/**</em>
+<a class="jxr_linenumber" name="608" href="#608">608</a> <em class="jxr_javadoccomment">     * @param rootPageOffset the rootPageOffset to set</em>
+<a class="jxr_linenumber" name="609" href="#609">609</a> <em class="jxr_javadoccomment">     */</em>
+<a class="jxr_linenumber" name="610" href="#610">610</a>     <em class="jxr_comment">/*<em class="jxr_comment"> No qualifier*/</em><strong class="jxr_keyword">void</strong> setRootPageOffset( <strong class="jxr_keyword">long</strong> rootPageOffset )</em>
+<a class="jxr_linenumber" name="611" href="#611">611</a>     {
+<a class="jxr_linenumber" name="612" href="#612">612</a>         btreeHeader.setRootPageOffset( rootPageOffset );
+<a class="jxr_linenumber" name="613" href="#613">613</a>     }
+<a class="jxr_linenumber" name="614" href="#614">614</a> 
+<a class="jxr_linenumber" name="615" href="#615">615</a> 
+<a class="jxr_linenumber" name="616" href="#616">616</a>     <em class="jxr_javadoccomment">/**</em>
+<a class="jxr_linenumber" name="617" href="#617">617</a> <em class="jxr_javadoccomment">     * @return the nextBTreeOffset</em>
+<a class="jxr_linenumber" name="618" href="#618">618</a> <em class="jxr_javadoccomment">     */</em>
+<a class="jxr_linenumber" name="619" href="#619">619</a>     <em class="jxr_comment">/*<em class="jxr_comment"> No qualifier*/</em><strong class="jxr_keyword">long</strong> getNextBTreeOffset()</em>
+<a class="jxr_linenumber" name="620" href="#620">620</a>     {
+<a class="jxr_linenumber" name="621" href="#621">621</a>         <strong class="jxr_keyword">return</strong> btreeHeader.getNextBTreeOffset();
+<a class="jxr_linenumber" name="622" href="#622">622</a>     }
+<a class="jxr_linenumber" name="623" href="#623">623</a> 
+<a class="jxr_linenumber" name="624" href="#624">624</a> 
+<a class="jxr_linenumber" name="625" href="#625">625</a>     <em class="jxr_javadoccomment">/**</em>
+<a class="jxr_linenumber" name="626" href="#626">626</a> <em class="jxr_javadoccomment">     * @param nextBTreeOffset the nextBTreeOffset to set</em>
+<a class="jxr_linenumber" name="627" href="#627">627</a> <em class="jxr_javadoccomment">     */</em>
+<a class="jxr_linenumber" name="628" href="#628">628</a>     <em class="jxr_comment">/*<em class="jxr_comment"> No qualifier*/</em><strong class="jxr_keyword">void</strong> setNextBTreeOffset( <strong class="jxr_keyword">long</strong> nextBTreeOffset )</em>
+<a class="jxr_linenumber" name="629" href="#629">629</a>     {
+<a class="jxr_linenumber" name="630" href="#630">630</a>         btreeHeader.setNextBTreeOffset( nextBTreeOffset );
+<a class="jxr_linenumber" name="631" href="#631">631</a>     }
+<a class="jxr_linenumber" name="632" href="#632">632</a> 
+<a class="jxr_linenumber" name="633" href="#633">633</a> 
+<a class="jxr_linenumber" name="634" href="#634">634</a>     <em class="jxr_javadoccomment">/**</em>
+<a class="jxr_linenumber" name="635" href="#635">635</a> <em class="jxr_javadoccomment">     * Gets the number which is a power of 2 immediately above the given positive number.</em>
+<a class="jxr_linenumber" name="636" href="#636">636</a> <em class="jxr_javadoccomment">     */</em>
+<a class="jxr_linenumber" name="637" href="#637">637</a>     <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">int</strong> getPowerOf2( <strong class="jxr_keyword">int</strong> size )
+<a class="jxr_linenumber" name="638" href="#638">638</a>     {
+<a class="jxr_linenumber" name="639" href="#639">639</a>         <strong class="jxr_keyword">int</strong> newSize = --size;
+<a class="jxr_linenumber" name="640" href="#640">640</a>         newSize |= newSize &gt;&gt; 1;
+<a class="jxr_linenumber" name="641" href="#641">641</a>         newSize |= newSize &gt;&gt; 2;
+<a class="jxr_linenumber" name="642" href="#642">642</a>         newSize |= newSize &gt;&gt; 4;
+<a class="jxr_linenumber" name="643" href="#643">643</a>         newSize |= newSize &gt;&gt; 8;
+<a class="jxr_linenumber" name="644" href="#644">644</a>         newSize |= newSize &gt;&gt; 16;
+<a class="jxr_linenumber" name="645" href="#645">645</a>         newSize++;
+<a class="jxr_linenumber" name="646" href="#646">646</a> 
+<a class="jxr_linenumber" name="647" href="#647">647</a>         <strong class="jxr_keyword">return</strong> newSize;
+<a class="jxr_linenumber" name="648" href="#648">648</a>     }
+<a class="jxr_linenumber" name="649" href="#649">649</a> 
+<a class="jxr_linenumber" name="650" href="#650">650</a> 
+<a class="jxr_linenumber" name="651" href="#651">651</a>     <em class="jxr_javadoccomment">/**</em>
+<a class="jxr_linenumber" name="652" href="#652">652</a> <em class="jxr_javadoccomment">     * Set the maximum number of elements we can store in a page. This must be a</em>
+<a class="jxr_linenumber" name="653" href="#653">653</a> <em class="jxr_javadoccomment">     * number greater than 1, and a power of 2. The default page size is 16.</em>
+<a class="jxr_linenumber" name="654" href="#654">654</a> <em class="jxr_javadoccomment">     * &lt;br/&gt;</em>
+<a class="jxr_linenumber" name="655" href="#655">655</a> <em class="jxr_javadoccomment">     * If the provided size is below 2, we will default to DEFAULT_PAGE_SIZE.&lt;br/&gt;</em>
+<a class="jxr_linenumber" name="656" href="#656">656</a> <em class="jxr_javadoccomment">     * If the provided size is not a power of 2, we will select the closest power of 2</em>
+<a class="jxr_linenumber" name="657" href="#657">657</a> <em class="jxr_javadoccomment">     * higher than the given number&lt;br/&gt;</em>
+<a class="jxr_linenumber" name="658" href="#658">658</a> <em class="jxr_javadoccomment">     * </em>
+<a class="jxr_linenumber" name="659" href="#659">659</a> <em class="jxr_javadoccomment">     * @param pageSize The requested page size</em>
+<a class="jxr_linenumber" name="660" href="#660">660</a> <em class="jxr_javadoccomment">     */</em>
+<a class="jxr_linenumber" name="661" href="#661">661</a>     <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">void</strong> setPageSize( <strong class="jxr_keyword">int</strong> pageSize )
+<a class="jxr_linenumber" name="662" href="#662">662</a>     {
+<a class="jxr_linenumber" name="663" href="#663">663</a>         <strong class="jxr_keyword">if</strong> ( pageSize &lt;= 2 )
+<a class="jxr_linenumber" name="664" href="#664">664</a>         {
+<a class="jxr_linenumber" name="665" href="#665">665</a>             btreeHeader.setPageSize( DEFAULT_PAGE_SIZE );
+<a class="jxr_linenumber" name="666" href="#666">666</a>         }
+<a class="jxr_linenumber" name="667" href="#667">667</a>         <strong class="jxr_keyword">else</strong>
+<a class="jxr_linenumber" name="668" href="#668">668</a>         {
+<a class="jxr_linenumber" name="669" href="#669">669</a>             btreeHeader.setPageSize( getPowerOf2( pageSize ) );
+<a class="jxr_linenumber" name="670" href="#670">670</a>         }
+<a class="jxr_linenumber" name="671" href="#671">671</a>     }
+<a class="jxr_linenumber" name="672" href="#672">672</a> 
+<a class="jxr_linenumber" name="673" href="#673">673</a> 
+<a class="jxr_linenumber" name="674" href="#674">674</a>     <em class="jxr_javadoccomment">/**</em>
+<a class="jxr_linenumber" name="675" href="#675">675</a> <em class="jxr_javadoccomment">     * Set the new root page for this tree. Used for debug purpose only. The revision</em>
+<a class="jxr_linenumber" name="676" href="#676">676</a> <em class="jxr_javadoccomment">     * will always be 0;</em>
+<a class="jxr_linenumber" name="677" href="#677">677</a> <em class="jxr_javadoccomment">     * </em>
+<a class="jxr_linenumber" name="678" href="#678">678</a> <em class="jxr_javadoccomment">     * @param root the new root page.</em>
+<a class="jxr_linenumber" name="679" href="#679">679</a> <em class="jxr_javadoccomment">     */</em>
+<a class="jxr_linenumber" name="680" href="#680">680</a>     <em class="jxr_comment">/*<em class="jxr_comment"> No qualifier */</em><strong class="jxr_keyword">void</strong> setRoot( Page&lt;K, V&gt; root )</em>
+<a class="jxr_linenumber" name="681" href="#681">681</a>     {
+<a class="jxr_linenumber" name="682" href="#682">682</a>         rootPage = root;
+<a class="jxr_linenumber" name="683" href="#683">683</a>     }
+<a class="jxr_linenumber" name="684" href="#684">684</a> 
+<a class="jxr_linenumber" name="685" href="#685">685</a> 
+<a class="jxr_linenumber" name="686" href="#686">686</a>     <em class="jxr_javadoccomment">/**</em>
+<a class="jxr_linenumber" name="687" href="#687">687</a> <em class="jxr_javadoccomment">     * Gets the RecordManager for a managed BTree</em>
+<a class="jxr_linenumber" name="688" href="#688">688</a> <em class="jxr_javadoccomment">     * </em>
+<a class="jxr_linenumber" name="689" href="#689">689</a> <em class="jxr_javadoccomment">     * @return The recordManager if the BTree is managed</em>
+<a class="jxr_linenumber" name="690" href="#690">690</a> <em class="jxr_javadoccomment">     */</em>
+<a class="jxr_linenumber" name="691" href="#691">691</a>     <em class="jxr_comment">/*<em class="jxr_comment"> No qualifier */</em><a href="../../../../../org/apache/directory/mavibot/btree/RecordManager.html">RecordManager</a> getRecordManager()</em>
+<a class="jxr_linenumber" name="692" href="#692">692</a>     {
+<a class="jxr_linenumber" name="693" href="#693">693</a>         <strong class="jxr_keyword">return</strong> recordManager;
+<a class="jxr_linenumber" name="694" href="#694">694</a>     }
+<a class="jxr_linenumber" name="695" href="#695">695</a> 
+<a class="jxr_linenumber" name="696" href="#696">696</a> 
+<a class="jxr_linenumber" name="697" href="#697">697</a>     <em class="jxr_javadoccomment">/**</em>
+<a class="jxr_linenumber" name="698" href="#698">698</a> <em class="jxr_javadoccomment">     * Inject a RecordManager for a managed BTree</em>
+<a class="jxr_linenumber" name="699" href="#699">699</a> <em class="jxr_javadoccomment">     * </em>
+<a class="jxr_linenumber" name="700" href="#700">700</a> <em class="jxr_javadoccomment">     * @param recordManager The injected RecordManager</em>
+<a class="jxr_linenumber" name="701" href="#701">701</a> <em class="jxr_javadoccomment">     */</em>
+<a class="jxr_linenumber" name="702" href="#702">702</a>     <em class="jxr_comment">/*<em class="jxr_comment"> No qualifier */</em><strong class="jxr_keyword">void</strong> setRecordManager( RecordManager recordManager )</em>
+<a class="jxr_linenumber" name="703" href="#703">703</a>     {
+<a class="jxr_linenumber" name="704" href="#704">704</a>         <strong class="jxr_keyword">this</strong>.recordManager = recordManager;
+<a class="jxr_linenumber" name="705" href="#705">705</a>         <strong class="jxr_keyword">this</strong>.type = BTreeTypeEnum.MANAGED;
+<a class="jxr_linenumber" name="706" href="#706">706</a>     }
+<a class="jxr_linenumber" name="707" href="#707">707</a> 
+<a class="jxr_linenumber" name="708" href="#708">708</a> 
+<a class="jxr_linenumber" name="709" href="#709">709</a>     <em class="jxr_javadoccomment">/**</em>
+<a class="jxr_linenumber" name="710" href="#710">710</a> <em class="jxr_javadoccomment">     * @return the pageSize</em>
+<a class="jxr_linenumber" name="711" href="#711">711</a> <em class="jxr_javadoccomment">     */</em>
+<a class="jxr_linenumber" name="712" href="#712">712</a>     <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">int</strong> getPageSize()
+<a class="jxr_linenumber" name="713" href="#713">713</a>     {
+<a class="jxr_linenumber" name="714" href="#714">714</a>         <strong class="jxr_keyword">return</strong> btreeHeader.getPageSize();
+<a class="jxr_linenumber" name="715" href="#715">715</a>     }
+<a class="jxr_linenumber" name="716" href="#716">716</a> 
+<a class="jxr_linenumber" name="717" href="#717">717</a> 
+<a class="jxr_linenumber" name="718" href="#718">718</a>     <em class="jxr_javadoccomment">/**</em>
+<a class="jxr_linenumber" name="719" href="#719">719</a> <em class="jxr_javadoccomment">     * Generates a new revision number. It's only used by the Page instances.</em>
+<a class="jxr_linenumber" name="720" href="#720">720</a> <em class="jxr_javadoccomment">     * </em>
+<a class="jxr_linenumber" name="721" href="#721">721</a> <em class="jxr_javadoccomment">     * @return a new incremental revision number</em>
+<a class="jxr_linenumber" name="722" href="#722">722</a> <em class="jxr_javadoccomment">     */</em>
+<a class="jxr_linenumber" name="723" href="#723">723</a>     <em class="jxr_javadoccomment">/**</em><em class="jxr_javadoccomment"> No qualifier */</em>
+<a class="jxr_linenumber" name="724" href="#724">724</a>     <strong class="jxr_keyword">long</strong> generateRevision()
+<a class="jxr_linenumber" name="725" href="#725">725</a>     {
+<a class="jxr_linenumber" name="726" href="#726">726</a>         <strong class="jxr_keyword">return</strong> btreeHeader.incrementRevision();
+<a class="jxr_linenumber" name="727" href="#727">727</a>     }
+<a class="jxr_linenumber" name="728" href="#728">728</a> 
+<a class="jxr_linenumber" name="729" href="#729">729</a> 
+<a class="jxr_linenumber" name="730" href="#730">730</a>     <em class="jxr_javadoccomment">/**</em>
+<a class="jxr_linenumber" name="731" href="#731">731</a> <em class="jxr_javadoccomment">     * Insert an entry in the BTree.</em>
+<a class="jxr_linenumber" name="732" href="#732">732</a> <em class="jxr_javadoccomment">     * &lt;p&gt;</em>
+<a class="jxr_linenumber" name="733" href="#733">733</a> <em class="jxr_javadoccomment">     * We will replace the value if the provided key already exists in the</em>
+<a class="jxr_linenumber" name="734" href="#734">734</a> <em class="jxr_javadoccomment">     * btree.</em>
+<a class="jxr_linenumber" name="735" href="#735">735</a> <em class="jxr_javadoccomment">     *</em>
+<a class="jxr_linenumber" name="736" href="#736">736</a> <em class="jxr_javadoccomment">     * @param key Inserted key</em>
+<a class="jxr_linenumber" name="737" href="#737">737</a> <em class="jxr_javadoccomment">     * @param value Inserted value</em>
+<a class="jxr_linenumber" name="738" href="#738">738</a> <em class="jxr_javadoccomment">     * @return Existing value, if any.</em>
+<a class="jxr_linenumber" name="739" href="#739">739</a> <em class="jxr_javadoccomment">     * @throws IOException TODO</em>
+<a class="jxr_linenumber" name="740" href="#740">740</a> <em class="jxr_javadoccomment">     */</em>
+<a class="jxr_linenumber" name="741" href="#741">741</a>     <strong class="jxr_keyword">public</strong> V insert( K key, V value ) <strong class="jxr_keyword">throws</strong> IOException
+<a class="jxr_linenumber" name="742" href="#742">742</a>     {
+<a class="jxr_linenumber" name="743" href="#743">743</a>         <strong class="jxr_keyword">long</strong> revision = generateRevision();
+<a class="jxr_linenumber" name="744" href="#744">744</a> 
+<a class="jxr_linenumber" name="745" href="#745">745</a>         V existingValue = <strong class="jxr_keyword">null</strong>;
+<a class="jxr_linenumber" name="746" href="#746">746</a> 
+<a class="jxr_linenumber" name="747" href="#747">747</a>         <strong class="jxr_keyword">try</strong>
+<a class="jxr_linenumber" name="748" href="#748">748</a>         {
+<a class="jxr_linenumber" name="749" href="#749">749</a>             <em class="jxr_comment">// Commented atm, we will have to play around the idea of transactions later</em>
+<a class="jxr_linenumber" name="750" href="#750">750</a>             writeLock.lock();
+<a class="jxr_linenumber" name="751" href="#751">751</a> 
+<a class="jxr_linenumber" name="752" href="#752">752</a>             InsertResult&lt;K, V&gt; result = insert( key, value, revision );
+<a class="jxr_linenumber" name="753" href="#753">753</a> 
+<a class="jxr_linenumber" name="754" href="#754">754</a>             <strong class="jxr_keyword">if</strong> ( result instanceof ModifyResult )
+<a class="jxr_linenumber" name="755" href="#755">755</a>             {
+<a class="jxr_linenumber" name="756" href="#756">756</a>                 existingValue = ( ( ModifyResult&lt;K, V&gt; ) result ).getModifiedValue();
+<a class="jxr_linenumber" name="757" href="#757">757</a>             }
+<a class="jxr_linenumber" name="758" href="#758">758</a>         }
+<a class="jxr_linenumber" name="759" href="#759">759</a>         <strong class="jxr_keyword">finally</strong>
+<a class="jxr_linenumber" name="760" href="#760">760</a>         {
+<a class="jxr_linenumber" name="761" href="#761">761</a>             <em class="jxr_comment">// See above</em>
+<a class="jxr_linenumber" name="762" href="#762">762</a>             writeLock.unlock();
+<a class="jxr_linenumber" name="763" href="#763">763</a>         }
+<a class="jxr_linenumber" name="764" href="#764">764</a> 
+<a class="jxr_linenumber" name="765" href="#765">765</a>         <strong class="jxr_keyword">return</strong> existingValue;
+<a class="jxr_linenumber" name="766" href="#766">766</a>     }
+<a class="jxr_linenumber" name="767" href="#767">767</a> 
+<a class="jxr_linenumber" name="768" href="#768">768</a> 
+<a class="jxr_linenumber" name="769" href="#769">769</a>     <em class="jxr_javadoccomment">/**</em>
+<a class="jxr_linenumber" name="770" href="#770">770</a> <em class="jxr_javadoccomment">     * Delete the entry which key is given as a parameter. If the entry exists, it will</em>

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