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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>BeanShellDecideRule xref</title><link type="text/css" rel="stylesheet" href="../../../../stylesheet.css" /></head><body><div id="overview"><a href="../../../../../apidocs/org/archive/crawler/deciderules/BeanShellDecideRule.html">View Javadoc</a></div><pre><a name="1" href="#1">1</a> <em class="comment">/*<em class="comment"> BeanShellDecideRule</em></em><a name="2" href="#2">2</a> <em class="comment">*</em><a name="3" href="#3">3</a> <em class="comment">* $Id: BeanShellDecideRule.java 4649 2006-09-25 17:16:55Z paul_jack $</em><a name="4" href="#4">4</a> <em class="comment">*</em><a name="5" href="#5">5</a> <em class="comment">* Created on Aug 7, 2006</em><a name="6" href="#6">6</a> <em class="comment">*</em><a name="7" href="#7">7</a> <em class="comment">* Copyright (C) 2006 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/deciderules/package-summary.html">org.archive.crawler.deciderules</a>;<a name="26" href="#26">26</a> <a name="27" href="#27">27</a> <strong>import</strong> java.io.File;<a name="28" href="#28">28</a> <strong>import</strong> java.io.IOException;<a name="29" href="#29">29</a> <strong>import</strong> java.util.Collections;<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.Map;<a name="32" href="#32">32</a> <strong>import</strong> java.util.logging.Level;<a name="33" href="#33">33</a> <strong>import</strong> java.util.logging.Logger;<a name="34" href="#34">34</a> <a name="35" href="#35">35</a> <strong>import</strong> org.archive.crawler.settings.SimpleType;<a name="36" href="#36">36</a> <strong>import</strong> org.archive.crawler.settings.Type;<a name="37" href="#37">37</a> <a name="38" href="#38">38</a> <strong>import</strong> bsh.EvalError;<a name="39" href="#39">39</a> <strong>import</strong> bsh.Interpreter;<a name="40" href="#40">40</a> <a name="41" href="#41">41</a> <a name="42" href="#42">42</a> <em>/**<em>*</em></em><a name="43" href="#43">43</a> <em> * Rule which runs a groovy script to make its decision. </em><a name="44" href="#44">44</a> <em> * </em><a name="45" href="#45">45</a> <em> * Script source may be provided via a file local to the crawler.</em><a name="46" href="#46">46</a> <em> * </em><a name="47" href="#47">47</a> <em> * Variables available to the script include 'object' (the object to be</em><a name="48" href="#48">48</a> <em> * evaluated, typically a CandidateURI or CrawlURI), 'self' </em><a name="49" href="#49">49</a> <em> * (this GroovyDecideRule instance), and 'controller' (the crawl's </em><a name="50" href="#50">50</a> <em> * CrawlController instance). </em><a name="51" href="#51">51</a> <em> *</em><a name="52" href="#52">52</a> <em> * TODO: reduce copy & paste with GroovyProcessor</em><a name="53" href="#53">53</a> <em> * </em><a name="54" href="#54">54</a> <em> * @author gojomo</em><a name="55" href="#55">55</a> <em> */</em><a name="56" href="#56">56</a> <strong>public</strong> <strong>class</strong> <a href="../../../../org/archive/crawler/deciderules/BeanShellDecideRule.html">BeanShellDecideRule</a> <strong>extends</strong> <a href="../../../../org/archive/crawler/deciderules/DecideRule.html">DecideRule</a> {<a name="57" href="#57">57</a> <a name="58" href="#58">58</a> <strong>private</strong> <strong>static</strong> <strong>final</strong> <strong>long</strong> serialVersionUID = -8433859929199308527L;<a name="59" href="#59">59</a> <a name="60" href="#60">60</a> <strong>private</strong> <strong>static</strong> <strong>final</strong> Logger logger =<a name="61" href="#61">61</a> Logger.getLogger(BeanShellDecideRule.<strong>class</strong>.getName());<a name="62" href="#62">62</a> <a name="63" href="#63">63</a> <em>/**<em>* setting for script file */</em></em><a name="64" href="#64">64</a> <strong>public</strong> <strong>final</strong> <strong>static</strong> String ATTR_SCRIPT_FILE = <span class="string">"script-file"</span>; <a name="65" href="#65">65</a> <a name="66" href="#66">66</a> <em>/**<em>* whether each thread should have its own script runner (true), or</em></em><a name="67" href="#67">67</a> <em> * they should share a single script runner with synchronized access */</em><a name="68" href="#68">68</a> <strong>public</strong> <strong>final</strong> <strong>static</strong> String ATTR_ISOLATE_THREADS = <span class="string">"isolate-threads"</span>;<a name="69" href="#69">69</a> <a name="70" href="#70">70</a> <strong>protected</strong> ThreadLocal<Interpreter> threadInterpreter = <a name="71" href="#71">71</a> <strong>new</strong> ThreadLocal<Interpreter>();;<a name="72" href="#72">72</a> <strong>protected</strong> Interpreter sharedInterpreter;<a name="73" href="#73">73</a> <strong>public</strong> Map<Object,Object> sharedMap = <a name="74" href="#74">74</a> Collections.synchronizedMap(<strong>new</strong> HashMap<Object,Object>());<a name="75" href="#75">75</a> <strong>protected</strong> <strong>boolean</strong> initialized = false; <a name="76" href="#76">76</a> <a name="77" href="#77">77</a> <strong>public</strong> <a href="../../../../org/archive/crawler/deciderules/BeanShellDecideRule.html">BeanShellDecideRule</a>(String name) {<a name="78" href="#78">78</a> <strong>super</strong>(name);<a name="79" href="#79">79</a> setDescription(<span class="string">"BeanShellDecideRule. Runs the BeanShell script "</span> +<a name="80" href="#80">80</a> <span class="string">"source (supplied via a file path) against "</span> +<a name="81" href="#81">81</a> <span class="string">"the current URI. Source should define a script method "</span> +<a name="82" href="#82">82</a> <span class="string">"'decisionFor(object)' which will be passed the object"</span> +<a name="83" href="#83">83</a> <span class="string">"to be evaluated and returns one of self.ACCEPT, "</span> +<a name="84" href="#84">84</a> <span class="string">"self.REJECT, or self.PASS. "</span> +<a name="85" href="#85">85</a> <span class="string">"The script may access this BeanShellDecideRule via"</span> +<a name="86" href="#86">86</a> <span class="string">"the 'self' variable and the CrawlController via the "</span> +<a name="87" href="#87">87</a> <span class="string">"'controller' variable. Runs the groovy script source "</span> +<a name="88" href="#88">88</a> <span class="string">"(supplied via a file path) against the "</span> +<a name="89" href="#89">89</a> <span class="string">"current URI."</span>);<a name="90" href="#90">90</a> <a href="../../../../org/archive/crawler/settings/Type.html">Type</a> t = addElementToDefinition(<strong>new</strong> <a href="../../../../org/archive/crawler/settings/SimpleType.html">SimpleType</a>(ATTR_SCRIPT_FILE,<a name="91" href="#91">91</a> <span class="string">"BeanShell script file"</span>, <span class="string">""</span>));<a name="92" href="#92">92</a> t.setOverrideable(false);?? 快捷鍵說明
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