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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>AdaptiveRevisitAttributeConstants xref</title><link type="text/css" rel="stylesheet" href="../../../../stylesheet.css" /></head><body><div id="overview"><a href="../../../../../apidocs/org/archive/crawler/frontier/AdaptiveRevisitAttributeConstants.html">View Javadoc</a></div><pre><a name="1" href="#1">1</a> <em class="comment">/*<em class="comment"> Constants</em></em><a name="2" href="#2">2</a> <em class="comment"> * </em><a name="3" href="#3">3</a> <em class="comment"> * $Id: AdaptiveRevisitAttributeConstants.java 3297 2005-04-01 14:57:45Z kristinn_sig $</em><a name="4" href="#4">4</a> <em class="comment"> * </em><a name="5" href="#5">5</a> <em class="comment"> * Created on 26.11.2004</em><a name="6" href="#6">6</a> <em class="comment"> *</em><a name="7" href="#7">7</a> <em class="comment"> * Copyright (C) 2004 Internet Archive.</em><a name="8" href="#8">8</a> <em class="comment"> * </em><a name="9" href="#9">9</a> <em class="comment"> * This file is part of the Heritrix web crawler (crawler.archive.org).</em><a name="10" href="#10">10</a> <em class="comment"> * </em><a name="11" href="#11">11</a> <em class="comment"> * Heritrix is free software; you can redistribute it and/or modify</em><a name="12" href="#12">12</a> <em class="comment"> * it under the terms of the GNU Lesser Public License as published by</em><a name="13" href="#13">13</a> <em class="comment"> * the Free Software Foundation; either version 2.1 of the License, or</em><a name="14" href="#14">14</a> <em class="comment"> * any later version.</em><a name="15" href="#15">15</a> <em class="comment"> * </em><a name="16" href="#16">16</a> <em class="comment"> * Heritrix is distributed in the hope that it will be useful, </em><a name="17" href="#17">17</a> <em class="comment"> * but WITHOUT ANY WARRANTY; without even the implied warranty of</em><a name="18" href="#18">18</a> <em class="comment"> * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the</em><a name="19" href="#19">19</a> <em class="comment"> * GNU Lesser Public License for more details.</em><a name="20" href="#20">20</a> <em class="comment"> * </em><a name="21" href="#21">21</a> <em class="comment"> * You should have received a copy of the GNU Lesser Public License</em><a name="22" href="#22">22</a> <em class="comment"> * along with Heritrix; if not, write to the Free Software</em><a name="23" href="#23">23</a> <em class="comment"> * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA</em><a name="24" href="#24">24</a> <em class="comment"> */</em><a name="25" href="#25">25</a> <strong>package</strong> <a href="../../../../org/archive/crawler/frontier/package-summary.html">org.archive.crawler.frontier</a>;<a name="26" href="#26">26</a> <a name="27" href="#27">27</a> <strong>import</strong> org.archive.crawler.datamodel.CoreAttributeConstants;<a name="28" href="#28">28</a> <a name="29" href="#29">29</a> <em>/**<em>*</em></em><a name="30" href="#30">30</a> <em> * Defines static constants for the Adaptive Revisiting module defining data</em><a name="31" href="#31">31</a> <em> * keys in the CrawlURI AList. </em><a name="32" href="#32">32</a> <em> *</em><a name="33" href="#33">33</a> <em> * @author Kristinn Sigurdsson</em><a name="34" href="#34">34</a> <em> * </em><a name="35" href="#35">35</a> <em> * @see org.archive.crawler.datamodel.CoreAttributeConstants</em><a name="36" href="#36">36</a> <em> */</em><a name="37" href="#37">37</a> <strong>public</strong> <strong>interface</strong> <a href="../../../../org/archive/crawler/frontier/AdaptiveRevisitAttributeConstants.html">AdaptiveRevisitAttributeConstants</a><a name="38" href="#38">38</a> <strong>extends</strong> <a href="../../../../org/archive/crawler/datamodel/CoreAttributeConstants.html">CoreAttributeConstants</a> {<a name="39" href="#39">39</a> <a name="40" href="#40">40</a> <em>/**<em>* Designates a field in the CrawlURIs AList for the content digest of</em></em><a name="41" href="#41">41</a> <em> * an earlier visit. */</em><a name="42" href="#42">42</a> <strong>public</strong> <strong>static</strong> <strong>final</strong> String A_LAST_CONTENT_DIGEST = <span class="string">"last-content-digest"</span>;<a name="43" href="#43">43</a> <strong>public</strong> <strong>static</strong> <strong>final</strong> String A_TIME_OF_NEXT_PROCESSING = <a name="44" href="#44">44</a> <span class="string">"time-of-next-processing"</span>;<a name="45" href="#45">45</a> <strong>public</strong> <strong>static</strong> <strong>final</strong> String A_WAIT_INTERVAL = <span class="string">"wait-interval"</span>;<a name="46" href="#46">46</a> <strong>public</strong> <strong>static</strong> <strong>final</strong> String A_NUMBER_OF_VISITS = <span class="string">"number-of-visits"</span>;<a name="47" href="#47">47</a> <strong>public</strong> <strong>static</strong> <strong>final</strong> String A_NUMBER_OF_VERSIONS = <span class="string">"number-of-versions"</span>;<a name="48" href="#48">48</a> <strong>public</strong> <strong>static</strong> <strong>final</strong> String A_FETCH_OVERDUE = <span class="string">"fetch-overdue"</span>;<a name="49" href="#49">49</a> <a name="50" href="#50">50</a> <strong>public</strong> <strong>static</strong> <strong>final</strong> String A_LAST_ETAG = <span class="string">"last-etag"</span>;<a name="51" href="#51">51</a> <strong>public</strong> <strong>static</strong> <strong>final</strong> String A_LAST_DATESTAMP = <span class="string">"last-datestamp"</span>;<a name="52" href="#52">52</a> <a name="53" href="#53">53</a> <strong>public</strong> <strong>static</strong> <strong>final</strong> String A_WAIT_REEVALUATED = <span class="string">"wait-reevaluated"</span>;<a name="54" href="#54">54</a> <a name="55" href="#55">55</a> <em>/**<em>* No knowledge of URI content. Possibly not fetched yet, unable</em></em><a name="56" href="#56">56</a> <em> * to check if different or an error occured on last fetch attempt. */</em><a name="57" href="#57">57</a> <strong>public</strong> <strong>static</strong> <strong>final</strong> <strong>int</strong> CONTENT_UNKNOWN = -1;<a name="58" href="#58">58</a> <a name="59" href="#59">59</a> <em>/**<em>* URI content has not changed between the two latest, successfully</em></em><a name="60" href="#60">60</a> <em> * completed fetches. */</em><a name="61" href="#61">61</a> <strong>public</strong> <strong>static</strong> <strong>final</strong> <strong>int</strong> CONTENT_UNCHANGED = 0;<a name="62" href="#62">62</a> <a name="63" href="#63">63</a> <em>/**<em>* URI content had changed between the two latest, successfully completed</em></em><a name="64" href="#64">64</a> <em> * fetches. By definition, content has changed if there has only been one</em><a name="65" href="#65">65</a> <em> * successful fetch made. */</em><a name="66" href="#66">66</a> <strong>public</strong> <strong>static</strong> <strong>final</strong> <strong>int</strong> CONTENT_CHANGED = 1;<a name="67" href="#67">67</a> <a name="68" href="#68">68</a> <em>/**<em>*</em></em><a name="69" href="#69">69</a> <em> * Key to use getting state of crawluri from the CrawlURI alist.</em><a name="70" href="#70">70</a> <em> */</em><a name="71" href="#71">71</a> <strong>public</strong> <strong>static</strong> <strong>final</strong> String A_CONTENT_STATE_KEY = <span class="string">"ar-state"</span>;<a name="72" href="#72">72</a> }</pre><hr/><div id="footer">This page was automatically generated by <a href="http://maven.apache.org/">Maven</a></div></body></html>?? 快捷鍵說明
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