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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>CrawlMapper xref</title><link type="text/css" rel="stylesheet" href="../../../../stylesheet.css" /></head><body><div id="overview"><a href="../../../../../apidocs/org/archive/crawler/processor/CrawlMapper.html">View Javadoc</a></div><pre><a name="1" href="#1">1</a> <em class="comment">/*<em class="comment"> CrawlMapper</em></em><a name="2" href="#2">2</a> <em class="comment"> * </em><a name="3" href="#3">3</a> <em class="comment"> * Created on Sep 30, 2005</em><a name="4" href="#4">4</a> <em class="comment"> *</em><a name="5" href="#5">5</a> <em class="comment"> * Copyright (C) 2005 Internet Archive.</em><a name="6" href="#6">6</a> <em class="comment"> * </em><a name="7" href="#7">7</a> <em class="comment"> * This file is part of the Heritrix web crawler (crawler.archive.org).</em><a name="8" href="#8">8</a> <em class="comment"> * </em><a name="9" href="#9">9</a> <em class="comment"> * Heritrix is free software; you can redistribute it and/or modify</em><a name="10" href="#10">10</a> <em class="comment"> * it under the terms of the GNU Lesser Public License as published by</em><a name="11" href="#11">11</a> <em class="comment"> * the Free Software Foundation; either version 2.1 of the License, or</em><a name="12" href="#12">12</a> <em class="comment"> * any later version.</em><a name="13" href="#13">13</a> <em class="comment"> * </em><a name="14" href="#14">14</a> <em class="comment"> * Heritrix is distributed in the hope that it will be useful, </em><a name="15" href="#15">15</a> <em class="comment"> * but WITHOUT ANY WARRANTY; without even the implied warranty of</em><a name="16" href="#16">16</a> <em class="comment"> * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the</em><a name="17" href="#17">17</a> <em class="comment"> * GNU Lesser Public License for more details.</em><a name="18" href="#18">18</a> <em class="comment"> * </em><a name="19" href="#19">19</a> <em class="comment"> * You should have received a copy of the GNU Lesser Public License</em><a name="20" href="#20">20</a> <em class="comment"> * along with Heritrix; if not, write to the Free Software</em><a name="21" href="#21">21</a> <em class="comment"> * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA</em><a name="22" href="#22">22</a> <em class="comment"> */</em><a name="23" href="#23">23</a> <strong>package</strong> <a href="../../../../org/archive/crawler/processor/package-summary.html">org.archive.crawler.processor</a>;<a name="24" href="#24">24</a> <a name="25" href="#25">25</a> <strong>import</strong> java.io.BufferedOutputStream;<a name="26" href="#26">26</a> <strong>import</strong> java.io.File;<a name="27" href="#27">27</a> <strong>import</strong> java.io.FileNotFoundException;<a name="28" href="#28">28</a> <strong>import</strong> java.io.FileOutputStream;<a name="29" href="#29">29</a> <strong>import</strong> java.io.PrintWriter;<a name="30" href="#30">30</a> <strong>import</strong> java.util.HashMap;<a name="31" href="#31">31</a> <strong>import</strong> java.util.Iterator;<a name="32" href="#32">32</a> <a name="33" href="#33">33</a> <strong>import</strong> javax.management.AttributeNotFoundException;<a name="34" href="#34">34</a> <a name="35" href="#35">35</a> <strong>import</strong> org.apache.commons.httpclient.URIException;<a name="36" href="#36">36</a> <strong>import</strong> org.archive.crawler.datamodel.CandidateURI;<a name="37" href="#37">37</a> <strong>import</strong> org.archive.crawler.datamodel.CrawlURI;<a name="38" href="#38">38</a> <strong>import</strong> org.archive.crawler.datamodel.FetchStatusCodes;<a name="39" href="#39">39</a> <strong>import</strong> org.archive.crawler.deciderules.DecideRule;<a name="40" href="#40">40</a> <strong>import</strong> org.archive.crawler.deciderules.DecideRuleSequence;<a name="41" href="#41">41</a> <strong>import</strong> org.archive.crawler.framework.Processor;<a name="42" href="#42">42</a> <strong>import</strong> org.archive.crawler.settings.SimpleType;<a name="43" href="#43">43</a> <strong>import</strong> org.archive.util.ArchiveUtils;<a name="44" href="#44">44</a> <strong>import</strong> org.archive.util.fingerprint.ArrayLongFPCache;<a name="45" href="#45">45</a> <a name="46" href="#46">46</a> <strong>import</strong> st.ata.util.FPGenerator;<a name="47" href="#47">47</a> <a name="48" href="#48">48</a> <em>/**<em>*</em></em><a name="49" href="#49">49</a> <em> * A simple crawl splitter/mapper, dividing up CandidateURIs/CrawlURIs</em><a name="50" href="#50">50</a> <em> * between crawlers by diverting some range of URIs to local log files</em><a name="51" href="#51">51</a> <em> * (which can then be imported to other crawlers). </em><a name="52" href="#52">52</a> <em> * </em><a name="53" href="#53">53</a> <em> * May operate on a CrawlURI (typically early in the processing chain) or</em><a name="54" href="#54">54</a> <em> * its CandidateURI outlinks (late in the processing chain, after </em><a name="55" href="#55">55</a> <em> * LinksScoper), or both (if inserted and configured in both places). </em><a name="56" href="#56">56</a> <em> * </em><a name="57" href="#57">57</a> <em> * <p>Applies a map() method, supplied by a concrete subclass, to</em><a name="58" href="#58">58</a> <em> * classKeys to map URIs to crawlers by name. </em><a name="59" href="#59">59</a> <em> *</em><a name="60" href="#60">60</a> <em> * <p>One crawler name is distinguished as the 'local name'; URIs mapped to</em><a name="61" href="#61">61</a> <em> * this name are not diverted, but continue to be processed normally.</em><a name="62" href="#62">62</a> <em> *</em><a name="63" href="#63">63</a> <em> * <p>If using the JMX importUris operation importing URLs dropped by</em><a name="64" href="#64">64</a> <em> * a {@link CrawlMapper} instance, use <code>recoveryLog</code> style.</em><a name="65" href="#65">65</a> <em> * </em><a name="66" href="#66">66</a> <em> * @author gojomo</em><a name="67" href="#67">67</a> <em> * @version $Date: 2006/08/11 08:07:54 $, $Revision: 1.8 $</em><a name="68" href="#68">68</a> <em> */</em><a name="69" href="#69">69</a> <strong>public</strong> <strong>abstract</strong> <strong>class</strong> <a href="../../../../org/archive/crawler/processor/CrawlMapper.html">CrawlMapper</a> <strong>extends</strong> <a href="../../../../org/archive/crawler/framework/Processor.html">Processor</a> implements <a href="../../../../org/archive/crawler/datamodel/FetchStatusCodes.html">FetchStatusCodes</a> {<a name="70" href="#70">70</a> <em>/**<em>*</em></em><a name="71" href="#71">71</a> <em> * PrintWriter which remembers the File to which it writes. </em><a name="72" href="#72">72</a> <em> */</em><a name="73" href="#73">73</a> <strong>private</strong> <strong>class</strong> FilePrintWriter <strong>extends</strong> PrintWriter {<a name="74" href="#74">74</a> File file; <a name="75" href="#75">75</a> <strong>public</strong> FilePrintWriter(File file) throws FileNotFoundException {<a name="76" href="#76">76</a> <strong>super</strong>(<strong>new</strong> BufferedOutputStream(<strong>new</strong> FileOutputStream(file)));<a name="77" href="#77">77</a> <strong>this</strong>.file = file; <a name="78" href="#78">78</a> }<a name="79" href="#79">79</a> <strong>public</strong> File getFile() {<a name="80" href="#80">80</a> <strong>return</strong> file;<a name="81" href="#81">81</a> }<a name="82" href="#82">82</a> }<a name="83" href="#83">83</a> <a name="84" href="#84">84</a> <em>/**<em>* whether to map <a href="../../../../org/archive/crawler/datamodel/CrawlURI.html">CrawlURI</a> itself (if status nonpositive) */</em></em><a name="85" href="#85">85</a> <strong>public</strong> <strong>static</strong> <strong>final</strong> String ATTR_CHECK_URI = <span class="string">"check-uri"</span>;<a name="86" href="#86">86</a> <strong>public</strong> <strong>static</strong> <strong>final</strong> Boolean DEFAULT_CHECK_URI = Boolean.TRUE;<a name="87" href="#87">87</a> <a name="88" href="#88">88</a> <em>/**<em>* whether to map CrawlURI's outlinks (if CandidateURIs) */</em></em><a name="89" href="#89">89</a> <strong>public</strong> <strong>static</strong> <strong>final</strong> String ATTR_CHECK_OUTLINKS = <span class="string">"check-outlinks"</span>;<a name="90" href="#90">90</a> <strong>public</strong> <strong>static</strong> <strong>final</strong> Boolean DEFAULT_CHECK_OUTLINKS = Boolean.TRUE;<a name="91" href="#91">91</a> <a name="92" href="#92">92</a> <em>/**<em>* decide rules to determine if an outlink is subject to mapping */</em> </em><a name="93" href="#93">93</a> <strong>public</strong> <strong>static</strong> <strong>final</strong> String ATTR_MAP_OUTLINK_DECIDE_RULES = <span class="string">"decide-rules"</span>;<a name="94" href="#94">94</a> <a name="95" href="#95">95</a> <em>/**<em>* name of local crawler (URIs mapped to here are not diverted) */</em></em><a name="96" href="#96">96</a> <strong>public</strong> <strong>static</strong> <strong>final</strong> String ATTR_LOCAL_NAME = <span class="string">"local-name"</span>;<a name="97" href="#97">97</a> <strong>public</strong> <strong>static</strong> <strong>final</strong> String DEFAULT_LOCAL_NAME = <span class="string">"."</span>;<a name="98" href="#98">98</a> <a name="99" href="#99">99</a> <em>/**<em>* where to log diversions */</em></em><a name="100" href="#100">100</a> <strong>public</strong> <strong>static</strong> <strong>final</strong> String ATTR_DIVERSION_DIR = <span class="string">"diversion-dir"</span>;<a name="101" href="#101">101</a> <strong>public</strong> <strong>static</strong> <strong>final</strong> String DEFAULT_DIVERSION_DIR = <span class="string">"diversions"</span>;<a name="102" href="#102">102</a> <a name="103" href="#103">103</a> <em>/**<em>* rotate logs when change occurs within this # of digits of timestamp */</em></em><a name="104" href="#104">104</a> <strong>public</strong> <strong>static</strong> <strong>final</strong> String ATTR_ROTATION_DIGITS = <span class="string">"rotation-digits"</span>;<a name="105" href="#105">105</a> <strong>public</strong> <strong>static</strong> <strong>final</strong> Integer DEFAULT_ROTATION_DIGITS = <strong>new</strong> Integer(10); <em class="comment">// hourly</em><a name="106" href="#106">106</a> <a name="107" href="#107">107</a> <em>/**<em>*</em></em><a name="108" href="#108">108</a> <em> * Mapping of target crawlers to logs (PrintWriters)</em><a name="109" href="#109">109</a> <em> */</em><a name="110" href="#110">110</a> HashMap diversionLogs = <strong>new</strong> HashMap();<a name="111" href="#111">111</a> <a name="112" href="#112">112</a> <em>/**<em>*</em></em><a name="113" href="#113">113</a> <em> * Truncated timestamp prefix for diversion logs; when</em><a name="114" href="#114">114</a> <em> * current time doesn't match, it's time to close all</em><a name="115" href="#115">115</a> <em> * current logs. </em><a name="116" href="#116">116</a> <em> */</em><a name="117" href="#117">117</a> String logGeneration = <span class="string">""</span>;<a name="118" href="#118">118</a> <a name="119" href="#119">119</a> <em>/**<em>* name of the enclosing crawler (URIs mapped here stay put) */</em></em><a name="120" href="#120">120</a> <strong>protected</strong> String localName;<a name="121" href="#121">121</a> <a name="122" href="#122">122</a> <strong>protected</strong> <a href="../../../../org/archive/util/fingerprint/ArrayLongFPCache.html">ArrayLongFPCache</a> cache;<a name="123" href="#123">123</a> <a name="124" href="#124">124</a> <em>/**<em>*</em></em><a name="125" href="#125">125</a> <em> * Constructor.</em><a name="126" href="#126">126</a> <em> * @param name Name of this processor.</em><a name="127" href="#127">127</a> <em> */</em><a name="128" href="#128">128</a> <strong>public</strong> <a href="../../../../org/archive/crawler/processor/CrawlMapper.html">CrawlMapper</a>(String name, String description) {<a name="129" href="#129">129</a> <strong>super</strong>(name, description);<a name="130" href="#130">130</a> addElementToDefinition(<strong>new</strong> <a href="../../../../org/archive/crawler/settings/SimpleType.html">SimpleType</a>(ATTR_LOCAL_NAME,<a name="131" href="#131">131</a> <span class="string">"Name of local crawler node; mappings to this name "</span> +<a name="132" href="#132">132</a> <span class="string">"result in normal processing (no diversion)."</span>,<a name="133" href="#133">133</a> DEFAULT_LOCAL_NAME));<a name="134" href="#134">134</a> addElementToDefinition(<strong>new</strong> <a href="../../../../org/archive/crawler/settings/SimpleType.html">SimpleType</a>(ATTR_DIVERSION_DIR,<a name="135" href="#135">135</a> <span class="string">"Directory to write diversion logs."</span>,<a name="136" href="#136">136</a> DEFAULT_DIVERSION_DIR));<a name="137" href="#137">137</a> addElementToDefinition(<strong>new</strong> <a href="../../../../org/archive/crawler/settings/SimpleType.html">SimpleType</a>(ATTR_CHECK_URI,<a name="138" href="#138">138</a> <span class="string">"Whether to apply the mapping to a URI being processed "</span> +<a name="139" href="#139">139</a> <span class="string">"itself, for example early in processing (while its "</span> +<a name="140" href="#140">140</a> <span class="string">"status is still 'unattempted')."</span>,<a name="141" href="#141">141</a> DEFAULT_CHECK_URI));<a name="142" href="#142">142</a> addElementToDefinition(<strong>new</strong> <a href="../../../../org/archive/crawler/settings/SimpleType.html">SimpleType</a>(ATTR_CHECK_OUTLINKS,<a name="143" href="#143">143</a> <span class="string">"Whether to apply the mapping to discovered outlinks, "</span> +<a name="144" href="#144">144</a> <span class="string">"for example after extraction has occurred. "</span>,<a name="145" href="#145">145</a> DEFAULT_CHECK_OUTLINKS));<a name="146" href="#146">146</a> addElementToDefinition(<strong>new</strong> <a href="../../../../org/archive/crawler/deciderules/DecideRuleSequence.html">DecideRuleSequence</a>(<a name="147" href="#147">147</a> ATTR_MAP_OUTLINK_DECIDE_RULES));<a name="148" href="#148">148</a> addElementToDefinition(<strong>new</strong> <a href="../../../../org/archive/crawler/settings/SimpleType.html">SimpleType</a>(ATTR_ROTATION_DIGITS,<a name="149" href="#149">149</a> <span class="string">"Number of timestamp digits to use as prefix of log "</span> +<a name="150" href="#150">150</a> <span class="string">"names (grouping all diversions from that period in "</span> +<a name="151" href="#151">151</a> <span class="string">"a single log). Default is 10 (hourly log rotation)."</span>,<a name="152" href="#152">152</a> DEFAULT_ROTATION_DIGITS));<a name="153" href="#153">153</a> }<a name="154" href="#154">154</a> <a name="155" href="#155">155</a> <a name="156" href="#156">156</a> <strong>protected</strong> <strong>void</strong> innerProcess(<a href="../../../../org/archive/crawler/datamodel/CrawlURI.html">CrawlURI</a> curi) {<a name="157" href="#157">157</a> String nowGeneration = <a name="158" href="#158">158</a> ArchiveUtils.get14DigitDate().substring(⌨️ 快捷键说明
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