abstracttracker.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="171" href="#171">171</a> <em>     * A method for logging current crawler state.</em>
<a name="172" href="#172">172</a> <em>     *</em>
<a name="173" href="#173">173</a> <em>     * This method will be called by run() at intervals specified in</em>
<a name="174" href="#174">174</a> <em>     * the crawl order file.  It is also invoked when pausing or</em>
<a name="175" href="#175">175</a> <em>     * stopping a crawl to capture the state at that point.  Default behavior is</em>
<a name="176" href="#176">176</a> <em>     * call to {@link CrawlController#logProgressStatistics} so CrawlController</em>
<a name="177" href="#177">177</a> <em>     * can act on progress statistics event.</em>
<a name="178" href="#178">178</a> <em>     * &lt;p></em>
<a name="179" href="#179">179</a> <em>     * It is recommended that for implementations of this method it be</em>
<a name="180" href="#180">180</a> <em>     * carefully considered if it should be synchronized in whole or in</em>
<a name="181" href="#181">181</a> <em>     * part</em>
<a name="182" href="#182">182</a> <em>     * @param e Progress statistics event.</em>
<a name="183" href="#183">183</a> <em>     */</em>
<a name="184" href="#184">184</a>     <strong>protected</strong> <strong>synchronized</strong> <strong>void</strong> progressStatisticsEvent(<strong>final</strong> EventObject e) {
<a name="185" href="#185">185</a>         <strong>this</strong>.controller.progressStatisticsEvent(e);
<a name="186" href="#186">186</a>     }
<a name="187" href="#187">187</a> 
<a name="188" href="#188">188</a>     <em>/**<em>*</em></em>
<a name="189" href="#189">189</a> <em>     * Get the starting time of the crawl (as given by</em>
<a name="190" href="#190">190</a> <em>     * &lt;code>System.currentTimeMillis()&lt;/code> when the crawl started).</em>
<a name="191" href="#191">191</a> <em>     * @return time fo the crawl's start</em>
<a name="192" href="#192">192</a> <em>     */</em>
<a name="193" href="#193">193</a>     <strong>public</strong> <strong>long</strong> getCrawlStartTime() {
<a name="194" href="#194">194</a>         <strong>return</strong> <strong>this</strong>.crawlerStartTime;
<a name="195" href="#195">195</a>     }
<a name="196" href="#196">196</a> 
<a name="197" href="#197">197</a>     <em>/**<em>*</em></em>
<a name="198" href="#198">198</a> <em>     * If crawl has ended it will return the time it ended (given by</em>
<a name="199" href="#199">199</a> <em>     * &lt;code>System.currentTimeMillis()&lt;/code> at that time).</em>
<a name="200" href="#200">200</a> <em>     * &lt;br></em>
<a name="201" href="#201">201</a> <em>     * If crawl is still going on it will return the same as</em>
<a name="202" href="#202">202</a> <em>     * &lt;code>System.currentTimeMillis()&lt;/code> at the time of the call.</em>
<a name="203" href="#203">203</a> <em>     * @return The time of the crawl ending or the current time if the crawl has</em>
<a name="204" href="#204">204</a> <em>     *         not ended.</em>
<a name="205" href="#205">205</a> <em>     */</em>
<a name="206" href="#206">206</a>     <strong>public</strong> <strong>long</strong> getCrawlEndTime() {
<a name="207" href="#207">207</a>         <strong>return</strong> (<strong>this</strong>.crawlerEndTime == -1)?
<a name="208" href="#208">208</a>             System.currentTimeMillis(): <strong>this</strong>.crawlerEndTime;
<a name="209" href="#209">209</a>     }
<a name="210" href="#210">210</a> 
<a name="211" href="#211">211</a>     <em>/**<em>*</em></em>
<a name="212" href="#212">212</a> <em>     * Returns the number of milliseconds that the crawl spent paused or</em>
<a name="213" href="#213">213</a> <em>     * otherwise in a nonactive state.</em>
<a name="214" href="#214">214</a> <em>     * @return the number of msec. that the crawl was paused or otherwise</em>
<a name="215" href="#215">215</a> <em>     *         suspended.</em>
<a name="216" href="#216">216</a> <em>     */</em>
<a name="217" href="#217">217</a>     <strong>public</strong> <strong>long</strong> getCrawlTotalPauseTime() {
<a name="218" href="#218">218</a>         <strong>return</strong> <strong>this</strong>.crawlerTotalPausedTime;
<a name="219" href="#219">219</a>     }
<a name="220" href="#220">220</a> 
<a name="221" href="#221">221</a>     <em>/**<em>*</em></em>
<a name="222" href="#222">222</a> <em>     * Get the time when the the crawl was last paused/suspended (as given by</em>
<a name="223" href="#223">223</a> <em>     * &lt;code>System.currentTimeMillis()&lt;/code> at that time). Will be 0 if the</em>
<a name="224" href="#224">224</a> <em>     * crawl is not currently paused.</em>
<a name="225" href="#225">225</a> <em>     * @return time of the crawl's last pause/suspend or 0 if the crawl is not</em>
<a name="226" href="#226">226</a> <em>     *         currently paused.</em>
<a name="227" href="#227">227</a> <em>     */</em>
<a name="228" href="#228">228</a>     <strong>public</strong> <strong>long</strong> getCrawlPauseStartedTime() {
<a name="229" href="#229">229</a>         <strong>return</strong> <strong>this</strong>.crawlerPauseStarted;
<a name="230" href="#230">230</a>     }
<a name="231" href="#231">231</a> 
<a name="232" href="#232">232</a>     <strong>public</strong> <strong>long</strong> getCrawlerTotalElapsedTime() {
<a name="233" href="#233">233</a>         <strong>if</strong> (getCrawlStartTime() == 0) {
<a name="234" href="#234">234</a>             <em class="comment">// if no start time set yet, consider elapsed time zero</em>
<a name="235" href="#235">235</a>             <strong>return</strong> 0;
<a name="236" href="#236">236</a>         }
<a name="237" href="#237">237</a>         
<a name="238" href="#238">238</a>         <strong>return</strong> (getCrawlPauseStartedTime() != 0)?
<a name="239" href="#239">239</a>             <em class="comment">// Are currently paused, calculate time up to last pause</em>
<a name="240" href="#240">240</a>             (getCrawlPauseStartedTime() - getCrawlTotalPauseTime() -
<a name="241" href="#241">241</a>                 getCrawlStartTime()):
<a name="242" href="#242">242</a>             <em class="comment">// Not paused, calculate total time.</em>
<a name="243" href="#243">243</a>             (getCrawlEndTime() - getCrawlTotalPauseTime() - getCrawlStartTime());
<a name="244" href="#244">244</a>     }
<a name="245" href="#245">245</a> 
<a name="246" href="#246">246</a>     <em>/**<em>*</em></em>
<a name="247" href="#247">247</a> <em>     * The number of seconds to wait between writing snapshot data to log file.</em>
<a name="248" href="#248">248</a> <em>     * @return the number of seconds to wait between writing snapshot data to</em>
<a name="249" href="#249">249</a> <em>     * log file.</em>
<a name="250" href="#250">250</a> <em>     */</em>
<a name="251" href="#251">251</a>     <strong>protected</strong> <strong>int</strong> getLogWriteInterval() {
<a name="252" href="#252">252</a>         <strong>int</strong> logInterval;
<a name="253" href="#253">253</a>         <strong>try</strong> {
<a name="254" href="#254">254</a>             logInterval =
<a name="255" href="#255">255</a>                 ((Integer) getAttribute(<strong>null</strong>, ATTR_STATS_INTERVAL)).intValue();
<a name="256" href="#256">256</a>         } <strong>catch</strong> (AttributeNotFoundException e) {
<a name="257" href="#257">257</a>             logInterval = 10;
<a name="258" href="#258">258</a>         }
<a name="259" href="#259">259</a>         <strong>return</strong> logInterval;
<a name="260" href="#260">260</a>     }
<a name="261" href="#261">261</a> 
<a name="262" href="#262">262</a>     <em>/**<em>*</em></em>
<a name="263" href="#263">263</a> <em>     * @see org.archive.crawler.event.CrawlStatusListener#crawlPausing(java.lang.String)</em>
<a name="264" href="#264">264</a> <em>     */</em>
<a name="265" href="#265">265</a>     <strong>public</strong> <strong>void</strong> crawlPausing(String statusMessage) {
<a name="266" href="#266">266</a>         logNote(<span class="string">"CRAWL WAITING - "</span> + statusMessage);
<a name="267" href="#267">267</a>     }
<a name="268" href="#268">268</a> 
<a name="269" href="#269">269</a>     <strong>protected</strong> <strong>void</strong> logNote(<strong>final</strong> String note) {
<a name="270" href="#270">270</a>         <strong>this</strong>.controller.logProgressStatistics(<strong>new</strong> <a href="../../../../org/archive/util/PaddingStringBuffer.html">PaddingStringBuffer</a>()
<a name="271" href="#271">271</a>                      .append(ArchiveUtils.TIMESTAMP14.format(<strong>new</strong> Date()))
<a name="272" href="#272">272</a>                      .append(<span class="string">" "</span>)
<a name="273" href="#273">273</a>                      .append(note)
<a name="274" href="#274">274</a>                      .toString());
<a name="275" href="#275">275</a>     }
<a name="276" href="#276">276</a> 
<a name="277" href="#277">277</a>     <strong>public</strong> <strong>void</strong> crawlPaused(String statusMessage) {
<a name="278" href="#278">278</a>         crawlerPauseStarted = System.currentTimeMillis();
<a name="279" href="#279">279</a>         progressStatisticsEvent(<strong>new</strong> EventObject(<strong>this</strong>));
<a name="280" href="#280">280</a>         logNote(<span class="string">"CRAWL PAUSED - "</span> + statusMessage);
<a name="281" href="#281">281</a>     }
<a name="282" href="#282">282</a> 
<a name="283" href="#283">283</a>     <strong>public</strong> <strong>void</strong> crawlResuming(String statusMessage) {
<a name="284" href="#284">284</a>         tallyCurrentPause();
<a name="285" href="#285">285</a>         logNote(<span class="string">"CRAWL RESUMED - "</span> + statusMessage);
<a name="286" href="#286">286</a>         lastLogPointTime = System.currentTimeMillis();
<a name="287" href="#287">287</a>     }
<a name="288" href="#288">288</a> 
<a name="289" href="#289">289</a>     <em>/**<em>*</em></em>
<a name="290" href="#290">290</a> <em>     * For a current pause (if any), add paused time to total and reset</em>
<a name="291" href="#291">291</a> <em>     */</em>
<a name="292" href="#292">292</a>     <strong>protected</strong> <strong>void</strong> tallyCurrentPause() {
<a name="293" href="#293">293</a>         <strong>if</strong> (<strong>this</strong>.crawlerPauseStarted > 0) {
<a name="294" href="#294">294</a>             <em class="comment">// Ok, we managed to actually pause before resuming.</em>
<a name="295" href="#295">295</a>             <strong>this</strong>.crawlerTotalPausedTime
<a name="296" href="#296">296</a>                 += (System.currentTimeMillis() - <strong>this</strong>.crawlerPauseStarted);
<a name="297" href="#297">297</a>         }
<a name="298" href="#298">298</a>         <strong>this</strong>.crawlerPauseStarted = 0;
<a name="299" href="#299">299</a>     }
<a name="300" href="#300">300</a> 
<a name="301" href="#301">301</a>     <strong>public</strong> <strong>void</strong> crawlEnding(String sExitMessage) {
<a name="302" href="#302">302</a>         logNote(<span class="string">"CRAWL ENDING - "</span> + sExitMessage);
<a name="303" href="#303">303</a>     }
<a name="304" href="#304">304</a> 
<a name="305" href="#305">305</a>     <em>/**<em>*</em></em>
<a name="306" href="#306">306</a> <em>     * @see org.archive.crawler.event.CrawlStatusListener#crawlEnded(java.lang.String)</em>
<a name="307" href="#307">307</a> <em>     */</em>
<a name="308" href="#308">308</a>     <strong>public</strong> <strong>void</strong> crawlEnded(String sExitMessage) {
<a name="309" href="#309">309</a>         <em class="comment">// Note the time when the crawl stops.</em>
<a name="310" href="#310">310</a>         crawlerEndTime = System.currentTimeMillis();
<a name="311" href="#311">311</a>         progressStatisticsEvent(<strong>new</strong> EventObject(<strong>this</strong>));
<a name="312" href="#312">312</a>         logNote(<span class="string">"CRAWL ENDED - "</span> + sExitMessage);
<a name="313" href="#313">313</a>         shouldrun = false;
<a name="314" href="#314">314</a>         dumpReports();
<a name="315" href="#315">315</a>         finalCleanup();
<a name="316" href="#316">316</a>     }
<a name="317" href="#317">317</a> 
<a name="318" href="#318">318</a>     <strong>public</strong> <strong>void</strong> crawlStarted(String message) {
<a name="319" href="#319">319</a>         tallyCurrentPause();
<a name="320" href="#320">320</a>         noteStart();
<a name="321" href="#321">321</a>     }
<a name="322" href="#322">322</a>     
<a name="323" href="#323">323</a>     <em>/**<em>*</em></em>
<a name="324" href="#324">324</a> <em>     * Dump reports, if any, on request or at crawl end. </em>
<a name="325" href="#325">325</a> <em>     */</em>
<a name="326" href="#326">326</a>     <strong>protected</strong> <strong>void</strong> dumpReports() {
<a name="327" href="#327">327</a>         <em class="comment">// by default do nothing; subclasses may override</em>
<a name="328" href="#328">328</a>     }
<a name="329" href="#329">329</a> 
<a name="330" href="#330">330</a>     <em>/**<em>*</em></em>
<a name="331" href="#331">331</a> <em>     * Cleanup resources used, at crawl end. </em>
<a name="332" href="#332">332</a> <em>     */</em>
<a name="333" href="#333">333</a>     <strong>protected</strong> <strong>void</strong> finalCleanup() {
<a name="334" href="#334">334</a>         controller = <strong>null</strong>; <em class="comment">// Facilitate GC.</em>
<a name="335" href="#335">335</a>     }
<a name="336" href="#336">336</a> 
<a name="337" href="#337">337</a>     <em>/**<em>*</em></em>
<a name="338" href="#338">338</a> <em>     * @see org.archive.crawler.framework.StatisticsTracking#crawlDuration()</em>
<a name="339" href="#339">339</a> <em>     */</em>
<a name="340" href="#340">340</a>     <strong>public</strong> <strong>long</strong> crawlDuration() {
<a name="341" href="#341">341</a>         <strong>return</strong> getCrawlerTotalElapsedTime();
<a name="342" href="#342">342</a>     }
<a name="343" href="#343">343</a> }
</pre>
<hr/><div id="footer">This page was automatically generated by <a href="http://maven.apache.org/">Maven</a></div></body>
</html>