xmlsettingshandler.html

用JAVA编写的,在做实验的时候留下来的,本来想删的,但是传上来,大家分享吧

<a name="282" href="#282">282</a>                         getResourceAsStream(f.getPath());
<a name="283" href="#283">283</a>                 }
<a name="284" href="#284">284</a>             } <strong>else</strong> {
<a name="285" href="#285">285</a>                 is = <strong>new</strong> FileInputStream(f);
<a name="286" href="#286">286</a>             }
<a name="287" href="#287">287</a>             <strong>if</strong> (is != <strong>null</strong>) {
<a name="288" href="#288">288</a>                 XMLReader parser = SAXParserFactory.newInstance()
<a name="289" href="#289">289</a>                     .newSAXParser().getXMLReader();
<a name="290" href="#290">290</a>                 InputStream file = <strong>new</strong> BufferedInputStream(is);
<a name="291" href="#291">291</a>                 parser.setContentHandler(<strong>new</strong> <a href="../../../../org/archive/crawler/settings/CrawlSettingsSAXHandler.html">CrawlSettingsSAXHandler</a>(settings));
<a name="292" href="#292">292</a>                 InputSource source = <strong>new</strong> InputSource(file);
<a name="293" href="#293">293</a>                 source.setSystemId(f.toURL().toExternalForm());
<a name="294" href="#294">294</a>                 parser.parse(source);
<a name="295" href="#295">295</a>                 result = settings;
<a name="296" href="#296">296</a>             }
<a name="297" href="#297">297</a>         } <strong>catch</strong> (SAXParseException e) {
<a name="298" href="#298">298</a>             logger.warning(e.getMessage() + <span class="string">" in '"</span> + e.getSystemId()
<a name="299" href="#299">299</a>                 + <span class="string">"', line: "</span> + e.getLineNumber() + <span class="string">", column: "</span>
<a name="300" href="#300">300</a>                 + e.getColumnNumber());
<a name="301" href="#301">301</a>         } <strong>catch</strong> (SAXException e) {
<a name="302" href="#302">302</a>             logger.warning(e.getMessage() + <span class="string">": "</span>
<a name="303" href="#303">303</a>                 + e.getException().getMessage());
<a name="304" href="#304">304</a>         } <strong>catch</strong> (ParserConfigurationException e) {
<a name="305" href="#305">305</a>             logger.warning(e.getMessage() + <span class="string">": "</span>
<a name="306" href="#306">306</a>                 + e.getCause().getMessage());
<a name="307" href="#307">307</a>         } <strong>catch</strong> (FactoryConfigurationError e) {
<a name="308" href="#308">308</a>             logger.warning(e.getMessage() + <span class="string">": "</span>
<a name="309" href="#309">309</a>                 + e.getException().getMessage());
<a name="310" href="#310">310</a>         } <strong>catch</strong> (IOException e) {
<a name="311" href="#311">311</a>             logger.warning(<span class="string">"Could not access file '"</span>
<a name="312" href="#312">312</a>                 + f.getAbsolutePath() + <span class="string">"': "</span> + e.getMessage());
<a name="313" href="#313">313</a>         }
<a name="314" href="#314">314</a>         <strong>return</strong> result;
<a name="315" href="#315">315</a>     }
<a name="316" href="#316">316</a> 
<a name="317" href="#317">317</a>     <strong>protected</strong> <strong>final</strong> <a href="../../../../org/archive/crawler/settings/CrawlerSettings.html">CrawlerSettings</a> readSettingsObject(<a href="../../../../org/archive/crawler/settings/CrawlerSettings.html">CrawlerSettings</a> settings) {
<a name="318" href="#318">318</a>         File filename = settingsToFilename(settings);
<a name="319" href="#319">319</a>         <strong>return</strong> readSettingsObject(settings, filename);
<a name="320" href="#320">320</a>     }
<a name="321" href="#321">321</a> 
<a name="322" href="#322">322</a>     <em>/**<em>* Get the &lt;code>File&lt;/code> object pointing to the order file.</em></em>
<a name="323" href="#323">323</a> <em>     *</em>
<a name="324" href="#324">324</a> <em>     * @return File object for the order file.</em>
<a name="325" href="#325">325</a> <em>     */</em>
<a name="326" href="#326">326</a>     <strong>public</strong> File getOrderFile() {
<a name="327" href="#327">327</a>         <strong>return</strong> orderFile;
<a name="328" href="#328">328</a>     }
<a name="329" href="#329">329</a> 
<a name="330" href="#330">330</a>     <em>/**<em>* Creates a replica of the settings file structure in another directory</em></em>
<a name="331" href="#331">331</a> <em>     * (fully recursive, includes all per host settings). The SettingsHandler</em>
<a name="332" href="#332">332</a> <em>     * will then refer to the new files.</em>
<a name="333" href="#333">333</a> <em>     *</em>
<a name="334" href="#334">334</a> <em>     * Observe that this method should only be called after the SettingsHandler</em>
<a name="335" href="#335">335</a> <em>     * has been initialized.</em>
<a name="336" href="#336">336</a> <em>     *</em>
<a name="337" href="#337">337</a> <em>     * @param newOrderFileName where the new order file should be saved.</em>
<a name="338" href="#338">338</a> <em>     * @param newSettingsDirectory the top level directory of the per host/domain</em>
<a name="339" href="#339">339</a> <em>     *                          settings files.</em>
<a name="340" href="#340">340</a> <em>     * @throws IOException</em>
<a name="341" href="#341">341</a> <em>     */</em>
<a name="342" href="#342">342</a>     <strong>public</strong> <strong>void</strong> copySettings(File newOrderFileName, String newSettingsDirectory)
<a name="343" href="#343">343</a>       throws IOException {
<a name="344" href="#344">344</a>         File oldSettingsDirectory = getSettingsDirectory();
<a name="345" href="#345">345</a> 
<a name="346" href="#346">346</a>         <em class="comment">// Write new orderfile and point the settingshandler to it</em>
<a name="347" href="#347">347</a>         orderFile = newOrderFileName;
<a name="348" href="#348">348</a>         <strong>try</strong> {
<a name="349" href="#349">349</a>             getOrder().setAttribute(
<a name="350" href="#350">350</a>                 <strong>new</strong> Attribute(
<a name="351" href="#351">351</a>                     CrawlOrder.ATTR_SETTINGS_DIRECTORY, newSettingsDirectory));
<a name="352" href="#352">352</a>         } <strong>catch</strong> (Exception e) {
<a name="353" href="#353">353</a>             <strong>throw</strong> <strong>new</strong> IOException(<span class="string">"Could not update settings with new location: "</span>
<a name="354" href="#354">354</a>                 + e.getMessage());
<a name="355" href="#355">355</a>         }
<a name="356" href="#356">356</a>         writeSettingsObject(getSettingsObject(<strong>null</strong>));
<a name="357" href="#357">357</a> 
<a name="358" href="#358">358</a>         File newDir = getPathRelativeToWorkingDirectory(newSettingsDirectory);
<a name="359" href="#359">359</a> 
<a name="360" href="#360">360</a>         <em class="comment">// Copy the per host files if src and dest directories are different.</em>
<a name="361" href="#361">361</a>         <strong>if</strong> (oldSettingsDirectory.compareTo(newDir) != 0) {
<a name="362" href="#362">362</a>             FileUtils.copyFiles(oldSettingsDirectory, newDir);
<a name="363" href="#363">363</a>         }
<a name="364" href="#364">364</a>     }
<a name="365" href="#365">365</a> 
<a name="366" href="#366">366</a>     <em>/**<em>*</em></em>
<a name="367" href="#367">367</a> <em>     * Transforms a relative path so that it is relative to the location of the</em>
<a name="368" href="#368">368</a> <em>     * order file. If an absolute path is given, it will be returned unchanged.&lt;p></em>
<a name="369" href="#369">369</a> <em>     * The location of it's order file is always considered as the 'working'</em>
<a name="370" href="#370">370</a> <em>     * directory for any given settings.</em>
<a name="371" href="#371">371</a> <em>     * @param path A relative path to a file (or directory)</em>
<a name="372" href="#372">372</a> <em>     * @return The same path modified so that it is relative to the file level</em>
<a name="373" href="#373">373</a> <em>     *         location of the order file for the settings handler.</em>
<a name="374" href="#374">374</a> <em>     */</em>
<a name="375" href="#375">375</a>     <strong>public</strong> File getPathRelativeToWorkingDirectory(String path) {
<a name="376" href="#376">376</a>         File f = <strong>new</strong> File(path);
<a name="377" href="#377">377</a>         <em class="comment">// If path is not absolute, set f's directory</em>
<a name="378" href="#378">378</a>         <em class="comment">// relative to the path of the order file</em>
<a name="379" href="#379">379</a>         <strong>if</strong> (!f.isAbsolute()) {
<a name="380" href="#380">380</a>             f = <strong>new</strong> File(<strong>this</strong>.getOrderFile().getParent(), path);
<a name="381" href="#381">381</a>         }
<a name="382" href="#382">382</a>         <strong>return</strong> f;
<a name="383" href="#383">383</a>     }
<a name="384" href="#384">384</a> 
<a name="385" href="#385">385</a>     <strong>public</strong> Collection getDomainOverrides(String rootDomain) {
<a name="386" href="#386">386</a>         File settingsDir = getSettingsDirectory();
<a name="387" href="#387">387</a> 
<a name="388" href="#388">388</a>         <em class="comment">//Find the right start directory.</em>
<a name="389" href="#389">389</a>         ArrayList domains = <strong>new</strong> ArrayList();
<a name="390" href="#390">390</a>         <em class="comment">//First we deconstruct the rootDomain string</em>
<a name="391" href="#391">391</a>         <strong>while</strong>(rootDomain != <strong>null</strong> &amp;&amp; rootDomain.length()>0){
<a name="392" href="#392">392</a>             <strong>if</strong>(rootDomain.indexOf('.')&lt;0){
<a name="393" href="#393">393</a>                 <em class="comment">// Last level.</em>
<a name="394" href="#394">394</a>                 domains.add(rootDomain);
<a name="395" href="#395">395</a>                 <strong>break</strong>; <em class="comment">//We're done.</em>
<a name="396" href="#396">396</a>             } <strong>else</strong> {
<a name="397" href="#397">397</a>                 <em class="comment">// Got more then one level left.</em>
<a name="398" href="#398">398</a>                 domains.add(rootDomain.substring(0,rootDomain.indexOf('.')));
<a name="399" href="#399">399</a>                 <em class="comment">// Strip down rootDomain.</em>
<a name="400" href="#400">400</a>                 rootDomain = rootDomain.substring(rootDomain.indexOf('.')+1);
<a name="401" href="#401">401</a>             }
<a name="402" href="#402">402</a>         }
<a name="403" href="#403">403</a>         <em class="comment">//Build up a proper path</em>
<a name="404" href="#404">404</a>         <em class="comment">//Since the domains are right to left, we start at the end of the array.</em>
<a name="405" href="#405">405</a>         StringBuffer subDir = <strong>new</strong> StringBuffer();
<a name="406" href="#406">406</a>         <strong>for</strong>(<strong>int</strong> i=(domains.size()-1) ; i>=0 ; i--){
<a name="407" href="#407">407</a>             subDir.append(File.separator+domains.get(i));
<a name="408" href="#408">408</a>         }
<a name="409" href="#409">409</a>         <em class="comment">//Then we move to the approprite directory.</em>
<a name="410" href="#410">410</a>         settingsDir = <strong>new</strong> File(settingsDir.getPath()+subDir);
<a name="411" href="#411">411</a>         TreeSet confirmedSubDomains = <strong>new</strong> TreeSet(<strong>new</strong> Comparator() {
<a name="412" href="#412">412</a>                 <strong>public</strong> <strong>int</strong> compare(Object o1, Object o2) {
<a name="413" href="#413">413</a>                     <strong>if</strong>(o1 instanceof String &amp;&amp; o2 instanceof String){
<a name="414" href="#414">414</a>                         <strong>return</strong> ((String)o1).compareTo(o2.toString());
<a name="415" href="#415">415</a>                     } <strong>else</strong> {
<a name="416" href="#416">416</a>                         <em class="comment">// We only account for strings.</em>
<a name="417" href="#417">417</a>                         <strong>return</strong> 0;
<a name="418" href="#418">418</a>                     }
<a name="419" href="#419">419</a>                 }
<a name="420" href="#420">420</a>             }
<a name="421" href="#421">421</a>         );
<a name="422" href="#422">422</a>         <strong>if</strong>(settingsDir.exists()){
<a name="423" href="#423">423</a>             <em class="comment">// Found our place! Search through it's subdirs.</em>
<a name="424" href="#424">424</a>             File[] possibleSubDomains = settingsDir.listFiles();
<a name="425" href="#425">425</a>             <strong>for</strong> (<strong>int</strong> i = 0; i &lt; possibleSubDomains.length; i++) {
<a name="426" href="#426">426</a>                 <strong>if</strong> (possibleSubDomains[i].isDirectory()