settingshandler.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="276" href="#276">276</a> 
<a name="277" href="#277">277</a>         <strong>if</strong> (settings == <strong>null</strong>) {
<a name="278" href="#278">278</a>             String tmpHost = host;
<a name="279" href="#279">279</a>             settings = getSettingsObject(tmpHost);
<a name="280" href="#280">280</a>             <strong>while</strong> (settings == <strong>null</strong> &amp;&amp; tmpHost != <strong>null</strong>) {
<a name="281" href="#281">281</a>                 tmpHost = getParentScope(tmpHost);
<a name="282" href="#282">282</a>                 settings = getSettingsObject(tmpHost);
<a name="283" href="#283">283</a>             }
<a name="284" href="#284">284</a> 
<a name="285" href="#285">285</a>             settingsCache.putSettings(host, settings);
<a name="286" href="#286">286</a>         }
<a name="287" href="#287">287</a> 
<a name="288" href="#288">288</a>         <strong>return</strong> settings;
<a name="289" href="#289">289</a>     }
<a name="290" href="#290">290</a> 
<a name="291" href="#291">291</a>     <strong>private</strong> <a href="../../../../org/archive/crawler/settings/CrawlerSettings.html">CrawlerSettings</a> getRefinementsForSettings(<a href="../../../../org/archive/crawler/settings/CrawlerSettings.html">CrawlerSettings</a> settings,
<a name="292" href="#292">292</a>             <a href="../../../../org/archive/net/UURI.html">UURI</a> uri) {
<a name="293" href="#293">293</a>         <strong>if</strong> (settings.hasRefinements()) {
<a name="294" href="#294">294</a>             <strong>for</strong>(Iterator it = settings.refinementsIterator(); it.hasNext();) {
<a name="295" href="#295">295</a>                 <a href="../../../../org/archive/crawler/settings/refinements/Refinement.html">Refinement</a> refinement = (Refinement) it.next();
<a name="296" href="#296">296</a>                 <strong>if</strong> (refinement.isWithinRefinementBounds(uri)) {
<a name="297" href="#297">297</a>                     settings = getSettingsObject(settings.getScope(),
<a name="298" href="#298">298</a>                             refinement.getReference());
<a name="299" href="#299">299</a>                 }
<a name="300" href="#300">300</a>             }
<a name="301" href="#301">301</a>         }
<a name="302" href="#302">302</a> 
<a name="303" href="#303">303</a>         <strong>return</strong> settings;
<a name="304" href="#304">304</a>     }
<a name="305" href="#305">305</a> 
<a name="306" href="#306">306</a>     <em>/**<em>* Get CrawlerSettings object for a host or domain.</em></em>
<a name="307" href="#307">307</a> <em>     *</em>
<a name="308" href="#308">308</a> <em>     * The difference between this method and the</em>
<a name="309" href="#309">309</a> <em>     * &lt;code>getSettings(String host)&lt;/code> is that this method will return</em>
<a name="310" href="#310">310</a> <em>     * null if there is no settings for particular host or domain.</em>
<a name="311" href="#311">311</a> <em>     *</em>
<a name="312" href="#312">312</a> <em>     * @param scope the host or domain to get the settings for.</em>
<a name="313" href="#313">313</a> <em>     * @return settings object for the host/domain or null if no</em>
<a name="314" href="#314">314</a> <em>     *         settings exist for the host/domain.</em>
<a name="315" href="#315">315</a> <em>     * @see #getSettings(String)</em>
<a name="316" href="#316">316</a> <em>     * @see #getOrCreateSettingsObject(String)</em>
<a name="317" href="#317">317</a> <em>     */</em>
<a name="318" href="#318">318</a>     <strong>public</strong> <a href="../../../../org/archive/crawler/settings/CrawlerSettings.html">CrawlerSettings</a> getSettingsObject(String scope) {
<a name="319" href="#319">319</a>         <strong>return</strong> getSettingsObject(scope, <strong>null</strong>);
<a name="320" href="#320">320</a>     }
<a name="321" href="#321">321</a> 
<a name="322" href="#322">322</a>     <em>/**<em>*</em></em>
<a name="323" href="#323">323</a> <em>     * Get CrawlerSettings object for a host/domain and a particular refinement.</em>
<a name="324" href="#324">324</a> <em>     *</em>
<a name="325" href="#325">325</a> <em>     * @param scope the host or domain to get the settings for.</em>
<a name="326" href="#326">326</a> <em>     * @param refinement the refinement reference to get.</em>
<a name="327" href="#327">327</a> <em>     * @return CrawlerSettings object for a host/domain and a particular</em>
<a name="328" href="#328">328</a> <em>     * refinement or null if no settings exist for the host/domain.</em>
<a name="329" href="#329">329</a> <em>     */</em>
<a name="330" href="#330">330</a>     <strong>public</strong> <a href="../../../../org/archive/crawler/settings/CrawlerSettings.html">CrawlerSettings</a> getSettingsObject(String scope, String refinement) {
<a name="331" href="#331">331</a>         <a href="../../../../org/archive/crawler/settings/CrawlerSettings.html">CrawlerSettings</a> settings =
<a name="332" href="#332">332</a>             settingsCache.getSettingsObject(scope, refinement);
<a name="333" href="#333">333</a> 
<a name="334" href="#334">334</a>         <strong>if</strong> (settings == <strong>null</strong>) {
<a name="335" href="#335">335</a>             <em class="comment">// Reference not found</em>
<a name="336" href="#336">336</a>             settings = <strong>new</strong> <a href="../../../../org/archive/crawler/settings/CrawlerSettings.html">CrawlerSettings</a>(<strong>this</strong>, scope, refinement);
<a name="337" href="#337">337</a>             <em class="comment">// Try to read settings from persisten storage. If its not there</em>
<a name="338" href="#338">338</a>             <em class="comment">// it will be set to null.</em>
<a name="339" href="#339">339</a>             settings = readSettingsObject(settings);
<a name="340" href="#340">340</a>             <strong>if</strong> (settings != <strong>null</strong>) {
<a name="341" href="#341">341</a>                 settingsCache.putSettings(scope, settings);
<a name="342" href="#342">342</a>             }
<a name="343" href="#343">343</a>         }
<a name="344" href="#344">344</a>         <strong>return</strong> settings;
<a name="345" href="#345">345</a>     }
<a name="346" href="#346">346</a> 
<a name="347" href="#347">347</a>     <em>/**<em>* Get or create CrawlerSettings object for a host or domain.</em></em>
<a name="348" href="#348">348</a> <em>     *</em>
<a name="349" href="#349">349</a> <em>     * This method is similar to {@link #getSettingsObject(String)} except that</em>
<a name="350" href="#350">350</a> <em>     * if there is no settings for this particular host or domain a new settings</em>
<a name="351" href="#351">351</a> <em>     * object will be returned.</em>
<a name="352" href="#352">352</a> <em>     *</em>
<a name="353" href="#353">353</a> <em>     * @param scope the host or domain to get or create the settings for.</em>
<a name="354" href="#354">354</a> <em>     * @return settings object for the host/domain.</em>
<a name="355" href="#355">355</a> <em>     * @see #getSettings(String)</em>
<a name="356" href="#356">356</a> <em>     * @see #getSettingsObject(String)</em>
<a name="357" href="#357">357</a> <em>     */</em>
<a name="358" href="#358">358</a>     <strong>public</strong> <a href="../../../../org/archive/crawler/settings/CrawlerSettings.html">CrawlerSettings</a> getOrCreateSettingsObject(String scope) {
<a name="359" href="#359">359</a>         <strong>return</strong> getOrCreateSettingsObject(scope, <strong>null</strong>);
<a name="360" href="#360">360</a>     }
<a name="361" href="#361">361</a> 
<a name="362" href="#362">362</a>     <strong>public</strong> <a href="../../../../org/archive/crawler/settings/CrawlerSettings.html">CrawlerSettings</a> getOrCreateSettingsObject(String scope,
<a name="363" href="#363">363</a>             String refinement) {
<a name="364" href="#364">364</a>         <a href="../../../../org/archive/crawler/settings/CrawlerSettings.html">CrawlerSettings</a> settings;
<a name="365" href="#365">365</a>         settings = getSettingsObject(scope, refinement);
<a name="366" href="#366">366</a>         <strong>if</strong> (settings == <strong>null</strong>) {
<a name="367" href="#367">367</a>             scope = scope.intern();
<a name="368" href="#368">368</a> 
<a name="369" href="#369">369</a>             <em class="comment">// No existing settings object found, create one</em>
<a name="370" href="#370">370</a>             settings = <strong>new</strong> <a href="../../../../org/archive/crawler/settings/CrawlerSettings.html">CrawlerSettings</a>(<strong>this</strong>, scope, refinement);
<a name="371" href="#371">371</a>             settingsCache.refreshHostToSettings();
<a name="372" href="#372">372</a>             settingsCache.putSettings(scope, settings);
<a name="373" href="#373">373</a>         }
<a name="374" href="#374">374</a>         <strong>return</strong> settings;
<a name="375" href="#375">375</a>     }
<a name="376" href="#376">376</a> 
<a name="377" href="#377">377</a>     <em>/**<em>* Write the CrawlerSettings object to persistent storage.</em></em>
<a name="378" href="#378">378</a> <em>     *</em>
<a name="379" href="#379">379</a> <em>     * @param settings the settings object to write.</em>
<a name="380" href="#380">380</a> <em>     */</em>
<a name="381" href="#381">381</a>     <strong>public</strong> <strong>abstract</strong> <strong>void</strong> writeSettingsObject(<a href="../../../../org/archive/crawler/settings/CrawlerSettings.html">CrawlerSettings</a> settings);
<a name="382" href="#382">382</a> 
<a name="383" href="#383">383</a>     <em>/**<em>* Read the CrawlerSettings object from persistent storage.</em></em>
<a name="384" href="#384">384</a> <em>     *</em>
<a name="385" href="#385">385</a> <em>     * @param settings the settings object to be updated with data from the</em>
<a name="386" href="#386">386</a> <em>     *                 persistent storage.</em>
<a name="387" href="#387">387</a> <em>     * @return the updated settings object or null if there was no data for this</em>
<a name="388" href="#388">388</a> <em>     *         in the persistent storage.</em>
<a name="389" href="#389">389</a> <em>     */</em>
<a name="390" href="#390">390</a>     <strong>protected</strong> <strong>abstract</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="391" href="#391">391</a> 
<a name="392" href="#392">392</a>     <em>/**<em>* Delete a settings object from persistent storage.</em></em>
<a name="393" href="#393">393</a> <em>     *</em>
<a name="394" href="#394">394</a> <em>     * @param settings the settings object to delete.</em>
<a name="395" href="#395">395</a> <em>     */</em>
<a name="396" href="#396">396</a>     <strong>public</strong> <strong>void</strong> deleteSettingsObject(<a href="../../../../org/archive/crawler/settings/CrawlerSettings.html">CrawlerSettings</a> settings) {
<a name="397" href="#397">397</a>         settingsCache.deleteSettingsObject(settings);
<a name="398" href="#398">398</a>     }
<a name="399" href="#399">399</a> 
<a name="400" href="#400">400</a>     <em>/**<em>* Get the CrawlOrder.</em></em>
<a name="401" href="#401">401</a> <em>     *</em>
<a name="402" href="#402">402</a> <em>     * @return the CrawlOrder</em>
<a name="403" href="#403">403</a> <em>     */</em>
<a name="404" href="#404">404</a>     <strong>public</strong> <a href="../../../../org/archive/crawler/datamodel/CrawlOrder.html">CrawlOrder</a> getOrder() {
<a name="405" href="#405">405</a>         <strong>return</strong> order;
<a name="406" href="#406">406</a>     }
<a name="407" href="#407">407</a> 
<a name="408" href="#408">408</a>     <em>/**<em>* Instatiate a new ModuleType given its name and className.</em></em>
<a name="409" href="#409">409</a> <em>     *</em>
<a name="410" href="#410">410</a> <em>     * @param name the name for the new ComplexType.</em>
<a name="411" href="#411">411</a> <em>     * @param className the class name of the new ComplexType.</em>
<a name="412" href="#412">412</a> <em>     * @return an instance of the class identified by className.</em>
<a name="413" href="#413">413</a> <em>     *</em>
<a name="414" href="#414">414</a> <em>     * @throws InvocationTargetException</em>
<a name="415" href="#415">415</a> <em>     */</em>
<a name="416" href="#416">416</a>     <strong>public</strong> <strong>static</strong> <a href="../../../../org/archive/crawler/settings/ModuleType.html">ModuleType</a> instantiateModuleTypeFromClassName(
<a name="417" href="#417">417</a>             String name, String className)