recoverylogmapper.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="162" href="#162">162</a>                     } <strong>else</strong> {
<a name="163" href="#163">163</a>                         <strong>if</strong> (logger.isLoggable(Level.FINE)) {
<a name="164" href="#164">164</a>                             logger.fine(<span class="string">"\tvia URL discovered via seed URL "</span> +
<a name="165" href="#165">165</a>                                 seedForFirstUrl);
<a name="166" href="#166">166</a>                         }
<a name="167" href="#167">167</a>                         <em class="comment">// Collapse</em>
<a name="168" href="#168">168</a>                         crawledUrlToSeedMap.put(firstUrl, seedForFirstUrl);
<a name="169" href="#169">169</a>                     }
<a name="170" href="#170">170</a>                     Set theSeedUrlList =
<a name="171" href="#171">171</a>                         (Set) seedUrlToDiscoveredUrlsMap.get(seedForFirstUrl);
<a name="172" href="#172">172</a>                         <strong>if</strong> (theSeedUrlList == <strong>null</strong>) {
<a name="173" href="#173">173</a>                         String message = <span class="string">"recover log "</span> +
<a name="174" href="#174">174</a>                                          recoverLogFileName + <span class="string">" at line "</span> +
<a name="175" href="#175">175</a>                                          reader.getLineNumber() +
<a name="176" href="#176">176</a>                                          <span class="string">" listed F+ URL ("</span> + viaUrl +
<a name="177" href="#177">177</a>                                          <span class="string">") for which found no seed list."</span>;
<a name="178" href="#178">178</a>                         <strong>if</strong> (seedNotFoundPrintWriter != <strong>null</strong>) {
<a name="179" href="#179">179</a>                             seedNotFoundPrintWriter.println(message);
<a name="180" href="#180">180</a>                         } <strong>else</strong> {
<a name="181" href="#181">181</a>                             <strong>throw</strong> <strong>new</strong> <a href="../../../../org/archive/crawler/util/SeedUrlNotFoundException.html">SeedUrlNotFoundException</a>(message);
<a name="182" href="#182">182</a>                         }
<a name="183" href="#183">183</a>                     } <strong>else</strong> {
<a name="184" href="#184">184</a>                         theSeedUrlList.add(firstUrl);
<a name="185" href="#185">185</a>                     }
<a name="186" href="#186">186</a>                 }
<a name="187" href="#187">187</a>             } <strong>else</strong> <strong>if</strong> (curLine.startsWith(RecoveryJournal.F_SUCCESS)) {
<a name="188" href="#188">188</a>                 <strong>if</strong> (logger.isLoggable(Level.FINE)) {
<a name="189" href="#189">189</a>                     logger.fine(<span class="string">"F_SUCCESS for URL "</span> + firstUrl);
<a name="190" href="#190">190</a>                 }
<a name="191" href="#191">191</a>                 successfullyCrawledUrls.add(firstUrl);
<a name="192" href="#192">192</a>             }
<a name="193" href="#193">193</a>         }
<a name="194" href="#194">194</a>         reader.close();
<a name="195" href="#195">195</a>         <strong>if</strong> (seedNotFoundPrintWriter != <strong>null</strong>) {
<a name="196" href="#196">196</a>             seedNotFoundPrintWriter.close();
<a name="197" href="#197">197</a>         }
<a name="198" href="#198">198</a>     }
<a name="199" href="#199">199</a> 
<a name="200" href="#200">200</a>     <em>/**<em>*</em></em>
<a name="201" href="#201">201</a> <em>     * Returns seed for urlString (null if seed not found).</em>
<a name="202" href="#202">202</a> <em>     * @param urlString</em>
<a name="203" href="#203">203</a> <em>     * @return Seed.</em>
<a name="204" href="#204">204</a> <em>     */</em>
<a name="205" href="#205">205</a>     <strong>public</strong> String getSeedForUrl(String urlString) {
<a name="206" href="#206">206</a>         <strong>return</strong> (seedUrlToDiscoveredUrlsMap.get(urlString) != <strong>null</strong>)?
<a name="207" href="#207">207</a>                 urlString: (String) crawledUrlToSeedMap.get(urlString);
<a name="208" href="#208">208</a>     }
<a name="209" href="#209">209</a> 
<a name="210" href="#210">210</a>     <em>/**<em>*</em></em>
<a name="211" href="#211">211</a> <em>     * @return Returns the seedUrlToDiscoveredUrlsMap.</em>
<a name="212" href="#212">212</a> <em>     */</em>
<a name="213" href="#213">213</a>     <strong>public</strong> Map getSeedUrlToDiscoveredUrlsMap() {
<a name="214" href="#214">214</a>         <strong>return</strong> <strong>this</strong>.seedUrlToDiscoveredUrlsMap;
<a name="215" href="#215">215</a>     }
<a name="216" href="#216">216</a> 
<a name="217" href="#217">217</a>     <em>/**<em>*</em></em>
<a name="218" href="#218">218</a> <em>     * @return Returns the successfullyCrawledUrls.</em>
<a name="219" href="#219">219</a> <em>     */</em>
<a name="220" href="#220">220</a>     <strong>public</strong> Set getSuccessfullyCrawledUrls() {
<a name="221" href="#221">221</a>         <strong>return</strong> <strong>this</strong>.successfullyCrawledUrls;
<a name="222" href="#222">222</a>     }
<a name="223" href="#223">223</a> 
<a name="224" href="#224">224</a>     <em>/**<em>*</em></em>
<a name="225" href="#225">225</a> <em>     * @return Returns the logger.</em>
<a name="226" href="#226">226</a> <em>     */</em>
<a name="227" href="#227">227</a>     <strong>public</strong> <strong>static</strong> Logger getLogger() {
<a name="228" href="#228">228</a>         <strong>return</strong> logger;
<a name="229" href="#229">229</a>     }
<a name="230" href="#230">230</a> 
<a name="231" href="#231">231</a>     <strong>private</strong> <strong>class</strong> SuccessfullyCrawledURLsIterator
<a name="232" href="#232">232</a>     implements Iterator {
<a name="233" href="#233">233</a>         <strong>private</strong> String nextValue = <strong>null</strong>;
<a name="234" href="#234">234</a>         <strong>private</strong> Iterator discoveredUrlsIterator;
<a name="235" href="#235">235</a> 
<a name="236" href="#236">236</a>         <strong>public</strong> SuccessfullyCrawledURLsIterator(String seedUrlString)
<a name="237" href="#237">237</a>         throws <a href="../../../../org/archive/crawler/util/SeedUrlNotFoundException.html">SeedUrlNotFoundException</a> {
<a name="238" href="#238">238</a>             Set discoveredUrlList =
<a name="239" href="#239">239</a>                 (Set)getSeedUrlToDiscoveredUrlsMap().get(seedUrlString);
<a name="240" href="#240">240</a>             <strong>if</strong> (discoveredUrlList == <strong>null</strong>) {
<a name="241" href="#241">241</a>                 <strong>throw</strong> <strong>new</strong> <a href="../../../../org/archive/crawler/util/SeedUrlNotFoundException.html">SeedUrlNotFoundException</a>(<span class="string">"Seed URL "</span> +
<a name="242" href="#242">242</a>                     seedUrlString + <span class="string">"  not found in seed list"</span>);
<a name="243" href="#243">243</a>             }
<a name="244" href="#244">244</a>             discoveredUrlsIterator = discoveredUrlList.iterator();
<a name="245" href="#245">245</a>         }
<a name="246" href="#246">246</a> 
<a name="247" href="#247">247</a>         <em>/**<em>*</em></em>
<a name="248" href="#248">248</a> <em>         * Idempotent method (because of null check on nextValue).</em>
<a name="249" href="#249">249</a> <em>         */</em>
<a name="250" href="#250">250</a>         <strong>private</strong> <strong>void</strong> populateNextValue() {
<a name="251" href="#251">251</a>             <strong>while</strong> (nextValue == <strong>null</strong> &amp; discoveredUrlsIterator.hasNext()) {
<a name="252" href="#252">252</a>                 String curDiscoveredUrl =
<a name="253" href="#253">253</a>                     (String)discoveredUrlsIterator.next();
<a name="254" href="#254">254</a>                 <strong>boolean</strong> succCrawled = getSuccessfullyCrawledUrls().
<a name="255" href="#255">255</a>                     contains(curDiscoveredUrl);
<a name="256" href="#256">256</a>                 <strong>if</strong> (getLogger().isLoggable(Level.FINE)) {
<a name="257" href="#257">257</a>                     getLogger().fine(<span class="string">"populateNextValue: curDiscoveredUrl="</span> +
<a name="258" href="#258">258</a>                             curDiscoveredUrl + <span class="string">", succCrawled="</span> +
<a name="259" href="#259">259</a>                             succCrawled);
<a name="260" href="#260">260</a>                 }
<a name="261" href="#261">261</a>                 <strong>if</strong> (succCrawled)
<a name="262" href="#262">262</a>                     nextValue = curDiscoveredUrl;
<a name="263" href="#263">263</a>             }
<a name="264" href="#264">264</a>         }
<a name="265" href="#265">265</a> 
<a name="266" href="#266">266</a>         <strong>public</strong> <strong>boolean</strong> hasNext() {
<a name="267" href="#267">267</a>             populateNextValue();
<a name="268" href="#268">268</a>             <strong>return</strong> (nextValue != <strong>null</strong>);
<a name="269" href="#269">269</a>         }
<a name="270" href="#270">270</a> 
<a name="271" href="#271">271</a>         <strong>public</strong> Object next() {
<a name="272" href="#272">272</a>             populateNextValue();
<a name="273" href="#273">273</a>             String returnValue = nextValue;
<a name="274" href="#274">274</a>             nextValue = <strong>null</strong>;
<a name="275" href="#275">275</a>             <strong>return</strong> <strong>return</strong>Value;
<a name="276" href="#276">276</a>         }
<a name="277" href="#277">277</a> 
<a name="278" href="#278">278</a>         <em>/**<em>*</em></em>
<a name="279" href="#279">279</a> <em>         * Remove operation is unsupported in this Iterator</em>
<a name="280" href="#280">280</a> <em>         * (will throw UnsupportedOperationException if called).</em>
<a name="281" href="#281">281</a> <em>         */</em>
<a name="282" href="#282">282</a>         <strong>public</strong> <strong>void</strong> remove() {
<a name="283" href="#283">283</a>             <strong>throw</strong> <strong>new</strong> UnsupportedOperationException(
<a name="284" href="#284">284</a>                 <span class="string">"SuccessfullyCrawledURLsIterator.remove: not supported."</span>);
<a name="285" href="#285">285</a>         }
<a name="286" href="#286">286</a>     }
<a name="287" href="#287">287</a> 
<a name="288" href="#288">288</a>     <strong>public</strong> Iterator getIteratorOfURLsSuccessfullyCrawledFromSeedUrl(
<a name="289" href="#289">289</a>             String seedUrlString) throws SeedUrlNotFoundException {
<a name="290" href="#290">290</a>         <strong>return</strong> <strong>new</strong> SuccessfullyCrawledURLsIterator(seedUrlString);
<a name="291" href="#291">291</a>     }
<a name="292" href="#292">292</a> 
<a name="293" href="#293">293</a>     <strong>public</strong> Collection getSeedCollection() {
<a name="294" href="#294">294</a>         <strong>return</strong> seedUrlToDiscoveredUrlsMap.keySet();
<a name="295" href="#295">295</a>     }
<a name="296" href="#296">296</a> 
<a name="297" href="#297">297</a>     <strong>public</strong> <strong>static</strong> <strong>void</strong> main(String args[]) {
<a name="298" href="#298">298</a>         <strong>if</strong> (args.length &lt; 1) {
<a name="299" href="#299">299</a>             System.out.println(<span class="string">"Usage: RecoveryLogMapper recoverLogFileName"</span>);
<a name="300" href="#300">300</a>             Runtime.getRuntime().exit(-1);
<a name="301" href="#301">301</a>         }
<a name="302" href="#302">302</a>         String recoverLogFileName = args[0];
<a name="303" href="#303">303</a>         <strong>try</strong> {
<a name="304" href="#304">304</a>             <a href="../../../../org/archive/crawler/util/RecoveryLogMapper.html">RecoveryLogMapper</a> myRecoveryLogMapper =
<a name="305" href="#305">305</a>                 <strong>new</strong> <a href="../../../../org/archive/crawler/util/RecoveryLogMapper.html">RecoveryLogMapper</a>(recoverLogFileName);
<a name="306" href="#306">306</a>             Iterator seedURLIterator =
<a name="307" href="#307">307</a>                 myRecoveryLogMapper.getSeedCollection().iterator();
<a name="308" href="#308">308</a>             <strong>while</strong> (seedURLIterator.hasNext()) {
<a name="309" href="#309">309</a>                 String curSeedUrl = (String) seedURLIterator.next();
<a name="310" href="#310">310</a>                 System.out.println(<span class="string">"URLs successfully crawled from seed URL "</span>
<a name="311" href="#311">311</a>                     + curSeedUrl);
<a name="312" href="#312">312</a>                 Iterator iteratorOfUrlsCrawledFromSeedUrl =
<a name="313" href="#313">313</a>                     myRecoveryLogMapper.
<a name="314" href="#314">314</a>                         getIteratorOfURLsSuccessfullyCrawledFromSeedUrl(
<a name="315" href="#315">315</a>                             curSeedUrl);
<a name="316" href="#316">316</a>                 <strong>while</strong> (iteratorOfUrlsCrawledFromSeedUrl.hasNext()) {
<a name="317" href="#317">317</a>                     String curCrawledUrlString =
<a name="318" href="#318">318</a>                         (String)iteratorOfUrlsCrawledFromSeedUrl.next();
<a name="319" href="#319">319</a>                     System.out.println(<span class="string">"    -> "</span> + curCrawledUrlString);
<a name="320" href="#320">320</a>                 }
<a name="321" href="#321">321</a>             }
<a name="322" href="#322">322</a>         } <strong>catch</strong> (Exception e) {
<a name="323" href="#323">323</a>             e.printStackTrace();
<a name="324" href="#324">324</a>         }
<a name="325" href="#325">325</a>     }
<a name="326" href="#326">326</a> }
</pre>
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