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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>ProcessUtils xref</title><link type="text/css" rel="stylesheet" href="../../../stylesheet.css" /></head><body><div id="overview"><a href="../../../../apidocs/org/archive/util/ProcessUtils.html">View Javadoc</a></div><pre><a name="1" href="#1">1</a> <em class="comment">/*<em class="comment"> ProcessUtils.java</em></em><a name="2" href="#2">2</a> <em class="comment"> *</em><a name="3" href="#3">3</a> <em class="comment"> * $Id: ProcessUtils.java,v 1.4 2006/05/02 02:54:20 stack-sf Exp $</em><a name="4" href="#4">4</a> <em class="comment"> *</em><a name="5" href="#5">5</a> <em class="comment"> * Created Jul 19, 2005</em><a name="6" href="#6">6</a> <em class="comment"> *</em><a name="7" href="#7">7</a> <em class="comment"> * Copyright (C) 2005 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/util/package-summary.html">org.archive.util</a>;<a name="26" href="#26">26</a> <a name="27" href="#27">27</a> <strong>import</strong> java.io.BufferedReader;<a name="28" href="#28">28</a> <strong>import</strong> java.io.IOException;<a name="29" href="#29">29</a> <strong>import</strong> java.io.InputStream;<a name="30" href="#30">30</a> <strong>import</strong> java.io.InputStreamReader;<a name="31" href="#31">31</a> <strong>import</strong> java.util.logging.Level;<a name="32" href="#32">32</a> <strong>import</strong> java.util.logging.Logger;<a name="33" href="#33">33</a> <a name="34" href="#34">34</a> <em>/**<em>*</em></em><a name="35" href="#35">35</a> <em> * Class to run an external process.</em><a name="36" href="#36">36</a> <em> * @author stack</em><a name="37" href="#37">37</a> <em> * @version $Date: 2006/05/02 02:54:20 $ $Revision: 1.4 $</em><a name="38" href="#38">38</a> <em> */</em><a name="39" href="#39">39</a> <strong>public</strong> <strong>class</strong> <a href="../../../org/archive/util/ProcessUtils.html">ProcessUtils</a> {<a name="40" href="#40">40</a> <strong>private</strong> <strong>static</strong> <strong>final</strong> Logger LOGGER =<a name="41" href="#41">41</a> Logger.getLogger(ProcessUtils.<strong>class</strong>.getName());<a name="42" href="#42">42</a> <a name="43" href="#43">43</a> <strong>protected</strong> <a href="../../../org/archive/util/ProcessUtils.html">ProcessUtils</a>() {<a name="44" href="#44">44</a> <strong>super</strong>();<a name="45" href="#45">45</a> }<a name="46" href="#46">46</a> <a name="47" href="#47">47</a> <em>/**<em>*</em></em><a name="48" href="#48">48</a> <em> * Thread to gobble up an output stream.</em><a name="49" href="#49">49</a> <em> * See <a href="http://www.javaworld.com/javaworld/jw-12-2000/jw-1229-traps.html" target="alexandria_uri">http://www.javaworld.com/javaworld/jw-12-2000/jw-1229-traps.html</a></em><a name="50" href="#50">50</a> <em> */</em><a name="51" href="#51">51</a> <strong>protected</strong> <strong>class</strong> StreamGobbler <strong>extends</strong> Thread {<a name="52" href="#52">52</a> <strong>private</strong> <strong>final</strong> InputStream is;<a name="53" href="#53">53</a> <strong>private</strong> <strong>final</strong> StringBuffer sink = <strong>new</strong> StringBuffer();<a name="54" href="#54">54</a> <a name="55" href="#55">55</a> StreamGobbler(InputStream is, String name) {<a name="56" href="#56">56</a> <strong>this</strong>.is = is;<a name="57" href="#57">57</a> setName(name);<a name="58" href="#58">58</a> }<a name="59" href="#59">59</a> <a name="60" href="#60">60</a> <strong>public</strong> <strong>void</strong> run() {<a name="61" href="#61">61</a> <strong>try</strong> {<a name="62" href="#62">62</a> BufferedReader br =<a name="63" href="#63">63</a> <strong>new</strong> BufferedReader(<strong>new</strong> InputStreamReader(<strong>this</strong>.is));<a name="64" href="#64">64</a> <strong>for</strong> (String line = <strong>null</strong>; (line = br.readLine()) != <strong>null</strong>;) {<a name="65" href="#65">65</a> <strong>this</strong>.sink.append(line);<a name="66" href="#66">66</a> }<a name="67" href="#67">67</a> } <strong>catch</strong> (IOException ioe) {<a name="68" href="#68">68</a> ioe.printStackTrace();<a name="69" href="#69">69</a> }<a name="70" href="#70">70</a> }<a name="71" href="#71">71</a> <a name="72" href="#72">72</a> <strong>public</strong> String getSink() {<a name="73" href="#73">73</a> <strong>return</strong> <strong>this</strong>.sink.toString();<a name="74" href="#74">74</a> }<a name="75" href="#75">75</a> }<a name="76" href="#76">76</a> <a name="77" href="#77">77</a> <em>/**<em>*</em></em><a name="78" href="#78">78</a> <em> * Data structure to hold result of a process exec.</em><a name="79" href="#79">79</a> <em> * @author stack</em><a name="80" href="#80">80</a> <em> * @version $Date: 2006/05/02 02:54:20 $ $Revision: 1.4 $</em><a name="81" href="#81">81</a> <em> */</em><a name="82" href="#82">82</a> <strong>public</strong> <strong>class</strong> ProcessResult {<a name="83" href="#83">83</a> <strong>private</strong> <strong>final</strong> String [] args;<a name="84" href="#84">84</a> <strong>private</strong> <strong>final</strong> <strong>int</strong> result;<a name="85" href="#85">85</a> <strong>private</strong> <strong>final</strong> String stdout;<a name="86" href="#86">86</a> <strong>private</strong> <strong>final</strong> String stderr;<a name="87" href="#87">87</a> <a name="88" href="#88">88</a> <strong>protected</strong> ProcessResult(String [] args, <strong>int</strong> result, String stdout,<a name="89" href="#89">89</a> String stderr) {<a name="90" href="#90">90</a> <strong>this</strong>.args = args;<a name="91" href="#91">91</a> <strong>this</strong>.result = result;<a name="92" href="#92">92</a> <strong>this</strong>.stderr = stderr;<a name="93" href="#93">93</a> <strong>this</strong>.stdout = stdout;<a name="94" href="#94">94</a> }<a name="95" href="#95">95</a> <a name="96" href="#96">96</a> <strong>public</strong> <strong>int</strong> getResult() {<a name="97" href="#97">97</a> <strong>return</strong> <strong>this</strong>.result;<a name="98" href="#98">98</a> }<a name="99" href="#99">99</a> <a name="100" href="#100">100</a> <strong>public</strong> String getStdout() {<a name="101" href="#101">101</a> <strong>return</strong> <strong>this</strong>.stdout;<a name="102" href="#102">102</a> }<a name="103" href="#103">103</a> <a name="104" href="#104">104</a> <strong>public</strong> String getStderr() {<a name="105" href="#105">105</a> <strong>return</strong> <strong>this</strong>.stderr;<a name="106" href="#106">106</a> }<a name="107" href="#107">107</a> <a name="108" href="#108">108</a> <strong>public</strong> String toString() {<a name="109" href="#109">109</a> StringBuffer sb = <strong>new</strong> StringBuffer();<a name="110" href="#110">110</a> <strong>for</strong> (<strong>int</strong> i = 0; i < <strong>this</strong>.args.length; i++) {<a name="111" href="#111">111</a> sb.append(<strong>this</strong>.args[i]);<a name="112" href="#112">112</a> sb.append(<span class="string">", "</span>);<a name="113" href="#113">113</a> }<a name="114" href="#114">114</a> <strong>return</strong> sb.toString() + <span class="string">" exit code: "</span> + <strong>this</strong>.result +<a name="115" href="#115">115</a> ((<strong>this</strong>.stderr != <strong>null</strong> && <strong>this</strong>.stderr.length() > 0)?<a name="116" href="#116">116</a> <span class="string">"\nSTDERR: "</span> + <strong>this</strong>.stderr: <span class="string">""</span>) +<a name="117" href="#117">117</a> ((<strong>this</strong>.stdout != <strong>null</strong> && <strong>this</strong>.stdout.length() > 0)?<a name="118" href="#118">118</a> <span class="string">"\nSTDOUT: "</span> + <strong>this</strong>.stdout: <span class="string">""</span>);<a name="119" href="#119">119</a> }<a name="120" href="#120">120</a> }<a name="121" href="#121">121</a> <a name="122" href="#122">122</a> <em>/**<em>*</em></em><a name="123" href="#123">123</a> <em> * Runs process.</em><a name="124" href="#124">124</a> <em> * @param args List of process args.</em><a name="125" href="#125">125</a> <em> * @return A ProcessResult data structure.</em><a name="126" href="#126">126</a> <em> * @throws IOException If interrupted, we throw an IOException. If non-zero</em><a name="127" href="#127">127</a> <em> * exit code, we throw an IOException (This may need to change).</em><a name="128" href="#128">128</a> <em> */</em><a name="129" href="#129">129</a> <strong>public</strong> <strong>static</strong> ProcessUtils.ProcessResult exec(String [] args)<a name="130" href="#130">130</a> throws IOException {<a name="131" href="#131">131</a> Process p = Runtime.getRuntime().exec(args);<a name="132" href="#132">132</a> <a href="../../../org/archive/util/ProcessUtils.html">ProcessUtils</a> pu = <strong>new</strong> <a href="../../../org/archive/util/ProcessUtils.html">ProcessUtils</a>();<a name="133" href="#133">133</a> <em class="comment">// Gobble up any output.</em><a name="134" href="#134">134</a> StreamGobbler err = pu.<strong>new</strong> StreamGobbler(p.getErrorStream(), <span class="string">"stderr"</span>);<a name="135" href="#135">135</a> err.setDaemon(<strong>true</strong>);<a name="136" href="#136">136</a> err.start();<a name="137" href="#137">137</a> StreamGobbler out = pu.<strong>new</strong> StreamGobbler(p.getInputStream(), <span class="string">"stdout"</span>);<a name="138" href="#138">138</a> out.setDaemon(<strong>true</strong>);<a name="139" href="#139">139</a> out.start();<a name="140" href="#140">140</a> <strong>int</strong> exitVal;<a name="141" href="#141">141</a> <strong>try</strong> {<a name="142" href="#142">142</a> exitVal = p.waitFor();<a name="143" href="#143">143</a> } <strong>catch</strong> (InterruptedException e) {<a name="144" href="#144">144</a> <strong>throw</strong> <strong>new</strong> IOException(<span class="string">"Wait on process "</span> + args + <span class="string">" interrupted: "</span><a name="145" href="#145">145</a> + e.getMessage());<a name="146" href="#146">146</a> }<a name="147" href="#147">147</a> ProcessUtils.ProcessResult result =<a name="148" href="#148">148</a> pu.<strong>new</strong> ProcessResult(args, exitVal, out.getSink(), err.getSink());<a name="149" href="#149">149</a> <strong>if</strong> (exitVal != 0) {<a name="150" href="#150">150</a> <strong>throw</strong> <strong>new</strong> IOException(result.toString());<a name="151" href="#151">151</a> } <strong>else</strong> <strong>if</strong> (LOGGER.isLoggable(Level.INFO)) {<a name="152" href="#152">152</a> LOGGER.info(result.toString());<a name="153" href="#153">153</a> }<a name="154" href="#154">154</a> <strong>return</strong> result;<a name="155" href="#155">155</a> }<a name="156" href="#156">156</a> }</pre><hr/><div id="footer">This page was automatically generated by <a href="http://maven.apache.org/">Maven</a></div></body></html>⌨️ 快捷键说明
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