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<!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" lang="en"><head><meta http-equiv="content-type" content="text/html; charset=UTF-8" /><title>ToeThread xref</title><link type="text/css" rel="stylesheet" href="../../../../stylesheet.css" /></head><body><div id="overview"><a href="../../../../../apidocs/org/archive/crawler/framework/ToeThread.html">View Javadoc</a></div><pre><a name="1" href="#1">1</a> <em class="comment">/*<em class="comment"> Copyright (C) 2003 Internet Archive.</em></em><a name="2" href="#2">2</a> <em class="comment"> *</em><a name="3" href="#3">3</a> <em class="comment"> * This file is part of the Heritrix web crawler (crawler.archive.org).</em><a name="4" href="#4">4</a> <em class="comment"> *</em><a name="5" href="#5">5</a> <em class="comment"> * Heritrix is free software; you can redistribute it and/or modify</em><a name="6" href="#6">6</a> <em class="comment"> * it under the terms of the GNU Lesser Public License as published by</em><a name="7" href="#7">7</a> <em class="comment"> * the Free Software Foundation; either version 2.1 of the License, or</em><a name="8" href="#8">8</a> <em class="comment"> * any later version.</em><a name="9" href="#9">9</a> <em class="comment"> *</em><a name="10" href="#10">10</a> <em class="comment"> * Heritrix is distributed in the hope that it will be useful,</em><a name="11" href="#11">11</a> <em class="comment"> * but WITHOUT ANY WARRANTY; without even the implied warranty of</em><a name="12" href="#12">12</a> <em class="comment"> * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the</em><a name="13" href="#13">13</a> <em class="comment"> * GNU Lesser Public License for more details.</em><a name="14" href="#14">14</a> <em class="comment"> *</em><a name="15" href="#15">15</a> <em class="comment"> * You should have received a copy of the GNU Lesser Public License</em><a name="16" href="#16">16</a> <em class="comment"> * along with Heritrix; if not, write to the Free Software</em><a name="17" href="#17">17</a> <em class="comment"> * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA</em><a name="18" href="#18">18</a> <em class="comment"> *</em><a name="19" href="#19">19</a> <em class="comment"> * ToeThread.java</em><a name="20" href="#20">20</a> <em class="comment"> * Created on May 14, 2003</em><a name="21" href="#21">21</a> <em class="comment"> *</em><a name="22" href="#22">22</a> <em class="comment"> * $Header: /cvsroot/archive-crawler/ArchiveOpenCrawler/src/java/org/archive/crawler/framework/ToeThread.java,v 1.65 2006/05/16 00:52:54 stack-sf Exp $</em><a name="23" href="#23">23</a> <em class="comment"> */</em><a name="24" href="#24">24</a> <strong>package</strong> <a href="../../../../org/archive/crawler/framework/package-summary.html">org.archive.crawler.framework</a>;<a name="25" href="#25">25</a> <a name="26" href="#26">26</a> <strong>import</strong> java.io.PrintWriter;<a name="27" href="#27">27</a> <strong>import</strong> java.util.HashMap;<a name="28" href="#28">28</a> <strong>import</strong> java.util.logging.Level;<a name="29" href="#29">29</a> <strong>import</strong> java.util.logging.Logger;<a name="30" href="#30">30</a> <a name="31" href="#31">31</a> <strong>import</strong> org.archive.crawler.datamodel.CoreAttributeConstants;<a name="32" href="#32">32</a> <strong>import</strong> org.archive.crawler.datamodel.CrawlOrder;<a name="33" href="#33">33</a> <strong>import</strong> org.archive.crawler.datamodel.CrawlURI;<a name="34" href="#34">34</a> <strong>import</strong> org.archive.crawler.datamodel.FetchStatusCodes;<a name="35" href="#35">35</a> <strong>import</strong> org.archive.crawler.datamodel.InstancePerThread;<a name="36" href="#36">36</a> <strong>import</strong> org.archive.crawler.framework.exceptions.EndedException;<a name="37" href="#37">37</a> <strong>import</strong> org.archive.util.ArchiveUtils;<a name="38" href="#38">38</a> <strong>import</strong> org.archive.util.DevUtils;<a name="39" href="#39">39</a> <strong>import</strong> org.archive.util.HttpRecorder;<a name="40" href="#40">40</a> <strong>import</strong> org.archive.util.HttpRecorderMarker;<a name="41" href="#41">41</a> <strong>import</strong> org.archive.util.ProgressStatisticsReporter;<a name="42" href="#42">42</a> <strong>import</strong> org.archive.util.Reporter;<a name="43" href="#43">43</a> <a name="44" href="#44">44</a> <strong>import</strong> com.sleepycat.util.RuntimeExceptionWrapper;<a name="45" href="#45">45</a> <a name="46" href="#46">46</a> <em>/**<em>*</em></em><a name="47" href="#47">47</a> <em> * One "worker thread"; asks for CrawlURIs, processes them,</em><a name="48" href="#48">48</a> <em> * repeats unless told otherwise.</em><a name="49" href="#49">49</a> <em> *</em><a name="50" href="#50">50</a> <em> * @author Gordon Mohr</em><a name="51" href="#51">51</a> <em> */</em><a name="52" href="#52">52</a> <strong>public</strong> <strong>class</strong> <a href="../../../../org/archive/crawler/framework/ToeThread.html">ToeThread</a> <strong>extends</strong> Thread<a name="53" href="#53">53</a> implements CoreAttributeConstants, FetchStatusCodes, HttpRecorderMarker,<a name="54" href="#54">54</a> Reporter, <a href="../../../../org/archive/util/ProgressStatisticsReporter.html">ProgressStatisticsReporter</a> {<a name="55" href="#55">55</a> <strong>private</strong> <strong>static</strong> <strong>final</strong> String STEP_NASCENT = <span class="string">"NASCENT"</span>;<a name="56" href="#56">56</a> <strong>private</strong> <strong>static</strong> <strong>final</strong> String STEP_PAUSING = <span class="string">"PAUSING"</span>;<a name="57" href="#57">57</a> <strong>private</strong> <strong>static</strong> <strong>final</strong> String STEP_ABOUT_TO_GET_URI = <span class="string">"ABOUT_TO_GET_URI"</span>;<a name="58" href="#58">58</a> <strong>private</strong> <strong>static</strong> <strong>final</strong> String STEP_EXIT_PROCESSING_LOOP =<a name="59" href="#59">59</a> <span class="string">"EXIT_PROCESSING_LOOP"</span>;<a name="60" href="#60">60</a> <strong>private</strong> <strong>static</strong> <strong>final</strong> String STEP_FINISHED = <span class="string">"FINISHED"</span>;<a name="61" href="#61">61</a> <strong>private</strong> <strong>static</strong> <strong>final</strong> String STEP_ABOUT_TO_BEGIN_CHAIN =<a name="62" href="#62">62</a> <span class="string">"ABOUT_TO_BEGIN_CHAIN"</span>;<a name="63" href="#63">63</a> <strong>private</strong> <strong>static</strong> <strong>final</strong> String STEP_ABOUT_TO_BEGIN_PROCESSOR =<a name="64" href="#64">64</a> <span class="string">"ABOUT_TO_BEGIN_PROCESSOR"</span>;<a name="65" href="#65">65</a> <strong>private</strong> <strong>static</strong> <strong>final</strong> String STEP_DONE_WITH_PROCESSORS =<a name="66" href="#66">66</a> <span class="string">"DONE_WITH_PROCESSORS"</span>;<a name="67" href="#67">67</a> <strong>private</strong> <strong>static</strong> <strong>final</strong> String STEP_HANDLING_RUNTIME_EXCEPTION =<a name="68" href="#68">68</a> <span class="string">"HANDLING_RUNTIME_EXCEPTION"</span>;<a name="69" href="#69">69</a> <strong>private</strong> <strong>static</strong> <strong>final</strong> String STEP_ABOUT_TO_RETURN_URI =<a name="70" href="#70">70</a> <span class="string">"ABOUT_TO_RETURN_URI"</span>;<a name="71" href="#71">71</a> <strong>private</strong> <strong>static</strong> <strong>final</strong> String STEP_FINISHING_PROCESS = <span class="string">"FINISHING_PROCESS"</span>;<a name="72" href="#72">72</a> <a name="73" href="#73">73</a> <strong>private</strong> <strong>static</strong> Logger logger =<a name="74" href="#74">74</a> Logger.getLogger(<span class="string">"org.archive.crawler.framework.ToeThread"</span>);<a name="75" href="#75">75</a> <a name="76" href="#76">76</a> <strong>private</strong> <a href="../../../../org/archive/crawler/framework/CrawlController.html">CrawlController</a> controller;<a name="77" href="#77">77</a> <strong>private</strong> <strong>int</strong> serialNumber;<a name="78" href="#78">78</a> <a name="79" href="#79">79</a> <em>/**<em>*</em></em><a name="80" href="#80">80</a> <em> * Each ToeThead has an instance of HttpRecord that gets used</em><a name="81" href="#81">81</a> <em> * over and over by each request.</em><a name="82" href="#82">82</a> <em> * </em><a name="83" href="#83">83</a> <em> * @see org.archive.util.HttpRecorderMarker</em><a name="84" href="#84">84</a> <em> */</em><a name="85" href="#85">85</a> <strong>private</strong> <a href="../../../../org/archive/util/HttpRecorder.html">HttpRecorder</a> httpRecorder = <strong>null</strong>;<a name="86" href="#86">86</a> <a name="87" href="#87">87</a> <strong>private</strong> HashMap localProcessors = <strong>new</strong> HashMap();<a name="88" href="#88">88</a> <strong>private</strong> String currentProcessorName = <span class="string">""</span>;<a name="89" href="#89">89</a> <a name="90" href="#90">90</a> <strong>private</strong> String coreName;<a name="91" href="#91">91</a> <strong>private</strong> <a href="../../../../org/archive/crawler/datamodel/CrawlURI.html">CrawlURI</a> currentCuri;<a name="92" href="#92">92</a> <strong>private</strong> <strong>long</strong> lastStartTime;<a name="93" href="#93">93</a> <strong>private</strong> <strong>long</strong> lastFinishTime;<a name="94" href="#94">94</a> <a name="95" href="#95">95</a> <em class="comment">// activity monitoring, debugging, and problem detection</em><a name="96" href="#96">96</a> <strong>private</strong> String step = STEP_NASCENT;<a name="97" href="#97">97</a> <strong>private</strong> <strong>long</strong> atStepSince;<a name="98" href="#98">98</a> <a name="99" href="#99">99</a> <em class="comment">// default priority; may not be meaningful in recent JVMs</em><a name="100" href="#100">100</a> <strong>private</strong> <strong>static</strong> <strong>final</strong> <strong>int</strong> DEFAULT_PRIORITY = Thread.NORM_PRIORITY-2;<a name="101" href="#101">101</a> <a name="102" href="#102">102</a> <em class="comment">// indicator that a thread is now surplus based on current desired</em><a name="103" href="#103">103</a> <em class="comment">// count; it should wrap up cleanly</em><a name="104" href="#104">104</a> <strong>private</strong> <strong>volatile</strong> <strong>boolean</strong> shouldRetire = false;<a name="105" href="#105">105</a> <a name="106" href="#106">106</a> <em>/**<em>*</em></em><a name="107" href="#107">107</a> <em> * Create a ToeThread</em><a name="108" href="#108">108</a> <em> * </em><a name="109" href="#109">109</a> <em> * @param g ToeThreadGroup</em><a name="110" href="#110">110</a> <em> * @param sn serial number</em><a name="111" href="#111">111</a> <em> */</em><a name="112" href="#112">112</a> <strong>public</strong> <a href="../../../../org/archive/crawler/framework/ToeThread.html">ToeThread</a>(<a href="../../../../org/archive/crawler/framework/ToePool.html">ToePool</a> g, <strong>int</strong> sn) {<a name="113" href="#113">113</a> <em class="comment">// TODO: add crawl name?</em><a name="114" href="#114">114</a> <strong>super</strong>(g,<span class="string">"ToeThread #"</span> + sn);<a name="115" href="#115">115</a> coreName=<span class="string">"ToeThread #"</span> + sn + <span class="string">": "</span>;<a name="116" href="#116">116</a> controller = g.getController();<a name="117" href="#117">117</a> serialNumber = sn;<a name="118" href="#118">118</a> setPriority(DEFAULT_PRIORITY);<a name="119" href="#119">119</a> <strong>int</strong> outBufferSize = ((Integer) controller<a name="120" href="#120">120</a> .getOrder()<a name="121" href="#121">121</a> .getUncheckedAttribute(<strong>null</strong>,CrawlOrder.ATTR_RECORDER_OUT_BUFFER))<a name="122" href="#122">122</a> .intValue();<a name="123" href="#123">123</a> <strong>int</strong> inBufferSize = ((Integer) controller<a name="124" href="#124">124</a> .getOrder()<a name="125" href="#125">125</a> .getUncheckedAttribute(<strong>null</strong>, CrawlOrder.ATTR_RECORDER_IN_BUFFER))<a name="126" href="#126">126</a> .intValue(); <a name="127" href="#127">127</a> httpRecorder = <strong>new</strong> <a href="../../../../org/archive/util/HttpRecorder.html">HttpRecorder</a>(controller.getScratchDisk(),<a name="128" href="#128">128</a> <span class="string">"tt"</span> + sn + <span class="string">"http"</span>, outBufferSize, inBufferSize);<a name="129" href="#129">129</a> lastFinishTime = System.currentTimeMillis();<a name="130" href="#130">130</a> }<a name="131" href="#131">131</a> <a name="132" href="#132">132</a> <em>/**<em>* (non-Javadoc)</em></em><a name="133" href="#133">133</a> <em> * @see java.lang.Thread#run()</em><a name="134" href="#134">134</a> <em> */</em><a name="135" href="#135">135</a> <strong>public</strong> <strong>void</strong> run() {<a name="136" href="#136">136</a> String name = controller.getOrder().getCrawlOrderName();<a name="137" href="#137">137</a> logger.fine(getName()+<span class="string">" started for order '"</span>+name+<span class="string">"'"</span>);<a name="138" href="#138">138</a> <a name="139" href="#139">139</a> <strong>try</strong> {<a name="140" href="#140">140</a> <strong>while</strong> ( <strong>true</strong> ) {<a name="141" href="#141">141</a> <em class="comment">// TODO check for thread-abort? or is waiting for interrupt enough?</em><a name="142" href="#142">142</a> continueCheck();<a name="143" href="#143">143</a> <a name="144" href="#144">144</a> setStep(STEP_ABOUT_TO_GET_URI);<a name="145" href="#145">145</a> <a name="146" href="#146">146</a> <a href="../../../../org/archive/crawler/datamodel/CrawlURI.html">CrawlURI</a> curi = controller.getFrontier().next();<a name="147" href="#147">147</a> <a name="148" href="#148">148</a> <strong>synchronized</strong>(<strong>this</strong>) {<a name="149" href="#149">149</a> continueCheck();⌨️ 快捷键说明
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