recoveryjournal.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="128" href="#128">128</a>     <strong>private</strong> Writer initialize (<strong>final</strong> File f)
<a name="129" href="#129">129</a>     throws FileNotFoundException, IOException {
<a name="130" href="#130">130</a>         <strong>return</strong> <strong>new</strong> OutputStreamWriter(<strong>new</strong> GZIPOutputStream(
<a name="131" href="#131">131</a>             <strong>new</strong> FastBufferedOutputStream(<strong>new</strong> FileOutputStream(f))));
<a name="132" href="#132">132</a>     }
<a name="133" href="#133">133</a> 
<a name="134" href="#134">134</a>     <strong>public</strong> <strong>synchronized</strong> <strong>void</strong> added(<a href="../../../../org/archive/crawler/datamodel/CrawlURI.html">CrawlURI</a> curi) {
<a name="135" href="#135">135</a>         accumulatingBuffer.length(0);
<a name="136" href="#136">136</a>         <strong>this</strong>.accumulatingBuffer.append(F_ADD).
<a name="137" href="#137">137</a>             append(curi.toString()).
<a name="138" href="#138">138</a>             append(<span class="string">" "</span>). 
<a name="139" href="#139">139</a>             append(curi.getPathFromSeed()).
<a name="140" href="#140">140</a>             append(<span class="string">" "</span>).
<a name="141" href="#141">141</a>             append(curi.flattenVia());
<a name="142" href="#142">142</a>         writeLine(accumulatingBuffer);
<a name="143" href="#143">143</a>     }
<a name="144" href="#144">144</a> 
<a name="145" href="#145">145</a>     <strong>public</strong> <strong>void</strong> finishedSuccess(<a href="../../../../org/archive/crawler/datamodel/CrawlURI.html">CrawlURI</a> curi) {
<a name="146" href="#146">146</a>         finishedSuccess(curi.toString());
<a name="147" href="#147">147</a>     }
<a name="148" href="#148">148</a>     
<a name="149" href="#149">149</a>     <strong>public</strong> <strong>void</strong> finishedSuccess(<a href="../../../../org/archive/net/UURI.html">UURI</a> uuri) {
<a name="150" href="#150">150</a>         finishedSuccess(uuri.toString());
<a name="151" href="#151">151</a>     }
<a name="152" href="#152">152</a>     
<a name="153" href="#153">153</a>     <strong>protected</strong> <strong>void</strong> finishedSuccess(String uuri) {
<a name="154" href="#154">154</a>         writeLine(F_SUCCESS, uuri);
<a name="155" href="#155">155</a>     }
<a name="156" href="#156">156</a> 
<a name="157" href="#157">157</a>     <strong>public</strong> <strong>void</strong> emitted(<a href="../../../../org/archive/crawler/datamodel/CrawlURI.html">CrawlURI</a> curi) {
<a name="158" href="#158">158</a>         writeLine(F_EMIT, curi.toString());
<a name="159" href="#159">159</a> 
<a name="160" href="#160">160</a>     }
<a name="161" href="#161">161</a> 
<a name="162" href="#162">162</a>     <strong>public</strong> <strong>void</strong> finishedFailure(<a href="../../../../org/archive/crawler/datamodel/CrawlURI.html">CrawlURI</a> curi) {
<a name="163" href="#163">163</a>         finishedFailure(curi.toString());
<a name="164" href="#164">164</a>     }
<a name="165" href="#165">165</a>     
<a name="166" href="#166">166</a>     <strong>public</strong> <strong>void</strong> finishedFailure(<a href="../../../../org/archive/net/UURI.html">UURI</a> uuri) {
<a name="167" href="#167">167</a>         finishedFailure(uuri.toString());
<a name="168" href="#168">168</a>     }
<a name="169" href="#169">169</a>     
<a name="170" href="#170">170</a>     <strong>public</strong> <strong>void</strong> finishedFailure(String u) {
<a name="171" href="#171">171</a>         writeLine(F_FAILURE, u);
<a name="172" href="#172">172</a>     }
<a name="173" href="#173">173</a> 
<a name="174" href="#174">174</a>     <strong>public</strong> <strong>void</strong> rescheduled(<a href="../../../../org/archive/crawler/datamodel/CrawlURI.html">CrawlURI</a> curi) {
<a name="175" href="#175">175</a>         writeLine(F_RESCHEDULE, curi.toString());
<a name="176" href="#176">176</a>     }
<a name="177" href="#177">177</a> 
<a name="178" href="#178">178</a>     <strong>private</strong> <strong>synchronized</strong> <strong>void</strong> writeLine(String string) {
<a name="179" href="#179">179</a>         <strong>try</strong> {
<a name="180" href="#180">180</a>             <strong>this</strong>.out.write(<span class="string">"\n"</span>);
<a name="181" href="#181">181</a>             <strong>this</strong>.out.write(string);
<a name="182" href="#182">182</a>             noteLine();
<a name="183" href="#183">183</a>         } <strong>catch</strong> (IOException e) {
<a name="184" href="#184">184</a>             e.printStackTrace();
<a name="185" href="#185">185</a>         }
<a name="186" href="#186">186</a>     }
<a name="187" href="#187">187</a> 
<a name="188" href="#188">188</a>     <strong>private</strong> <strong>synchronized</strong> <strong>void</strong> writeLine(String s1, String s2) {
<a name="189" href="#189">189</a>         <strong>try</strong> {
<a name="190" href="#190">190</a>             <strong>this</strong>.out.write(<span class="string">"\n"</span>);
<a name="191" href="#191">191</a>             <strong>this</strong>.out.write(s1);
<a name="192" href="#192">192</a>             <strong>this</strong>.out.write(s2);
<a name="193" href="#193">193</a>             noteLine();
<a name="194" href="#194">194</a>         } <strong>catch</strong> (IOException e) {
<a name="195" href="#195">195</a>             e.printStackTrace();
<a name="196" href="#196">196</a>         }
<a name="197" href="#197">197</a>     }
<a name="198" href="#198">198</a>     
<a name="199" href="#199">199</a>     <strong>private</strong> <strong>synchronized</strong> <strong>void</strong> writeLine(MutableString mstring) {
<a name="200" href="#200">200</a>         <strong>if</strong> (<strong>this</strong>.out == <strong>null</strong>) {
<a name="201" href="#201">201</a>             <strong>return</strong>;
<a name="202" href="#202">202</a>         }
<a name="203" href="#203">203</a>         <strong>try</strong> {
<a name="204" href="#204">204</a>             <strong>this</strong>.out.write(<span class="string">"\n"</span>);
<a name="205" href="#205">205</a>             mstring.write(out);
<a name="206" href="#206">206</a>             noteLine();
<a name="207" href="#207">207</a>         } <strong>catch</strong> (IOException e) {
<a name="208" href="#208">208</a>             e.printStackTrace();
<a name="209" href="#209">209</a>         }
<a name="210" href="#210">210</a>     }
<a name="211" href="#211">211</a>     
<a name="212" href="#212">212</a>     <em>/**<em>*</em></em>
<a name="213" href="#213">213</a> <em>     * @throws IOException</em>
<a name="214" href="#214">214</a> <em>     */</em>
<a name="215" href="#215">215</a>     <strong>private</strong> <strong>void</strong> noteLine() throws IOException {
<a name="216" href="#216">216</a>         lines++;
<a name="217" href="#217">217</a>         <strong>if</strong>(lines % TIMESTAMP_INTERVAL == 0) {
<a name="218" href="#218">218</a>             out.write(<span class="string">"\n"</span>);
<a name="219" href="#219">219</a>             out.write(LOG_TIMESTAMP);
<a name="220" href="#220">220</a>             out.write(ArchiveUtils.getLog14Date());
<a name="221" href="#221">221</a>         }
<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>     * Utility method for scanning a recovery journal and applying it to</em>
<a name="226" href="#226">226</a> <em>     * a Frontier.</em>
<a name="227" href="#227">227</a> <em>     * </em>
<a name="228" href="#228">228</a> <em>     * @param source Recover log path.</em>
<a name="229" href="#229">229</a> <em>     * @param frontier Frontier reference.</em>
<a name="230" href="#230">230</a> <em>     * @param retainFailures</em>
<a name="231" href="#231">231</a> <em>     * @throws IOException</em>
<a name="232" href="#232">232</a> <em>     * </em>
<a name="233" href="#233">233</a> <em>     * @see org.archive.crawler.framework.Frontier#importRecoverLog(String, boolean)</em>
<a name="234" href="#234">234</a> <em>     */</em>
<a name="235" href="#235">235</a>     <strong>public</strong> <strong>static</strong> <strong>void</strong> importRecoverLog(<strong>final</strong> File source,
<a name="236" href="#236">236</a>         <strong>final</strong> <a href="../../../../org/archive/crawler/framework/Frontier.html">Frontier</a> frontier, <strong>final</strong> <strong>boolean</strong> retainFailures)
<a name="237" href="#237">237</a>     throws IOException {
<a name="238" href="#238">238</a>         <strong>if</strong> (source == <strong>null</strong>) {
<a name="239" href="#239">239</a>             <strong>throw</strong> <strong>new</strong> IllegalArgumentException(<span class="string">"Passed source file is null."</span>);
<a name="240" href="#240">240</a>         }
<a name="241" href="#241">241</a>         LOGGER.info(<span class="string">"recovering frontier completion state from "</span>+source);
<a name="242" href="#242">242</a>         
<a name="243" href="#243">243</a>         <em class="comment">// first, fill alreadyIncluded with successes (and possibly failures),</em>
<a name="244" href="#244">244</a>         <em class="comment">// and count the total lines</em>
<a name="245" href="#245">245</a>         <strong>final</strong> <strong>int</strong> lines =
<a name="246" href="#246">246</a>             importCompletionInfoFromLog(source, frontier, retainFailures);
<a name="247" href="#247">247</a>         
<a name="248" href="#248">248</a>         LOGGER.info(<span class="string">"finished completion state; recovering queues from "</span> +
<a name="249" href="#249">249</a>             source);
<a name="250" href="#250">250</a> 
<a name="251" href="#251">251</a>         <em class="comment">// now, re-add anything that was in old frontier and not already</em>
<a name="252" href="#252">252</a>         <em class="comment">// registered as finished. Do this in a separate thread that signals</em>
<a name="253" href="#253">253</a>         <em class="comment">// this thread once ENOUGH_TO_START_CRAWLING URIs have been queued. </em>
<a name="254" href="#254">254</a>         <strong>final</strong> CountDownLatch recoveredEnough = <strong>new</strong> CountDownLatch(1);
<a name="255" href="#255">255</a>         <strong>new</strong> Thread(<strong>new</strong> Runnable() {
<a name="256" href="#256">256</a>             <strong>public</strong> <strong>void</strong> run() {
<a name="257" href="#257">257</a>                 importQueuesFromLog(source, frontier, lines, recoveredEnough);
<a name="258" href="#258">258</a>             }
<a name="259" href="#259">259</a>         }, <span class="string">"queuesRecoveryThread"</span>).start();
<a name="260" href="#260">260</a>         
<a name="261" href="#261">261</a>         <strong>try</strong> {
<a name="262" href="#262">262</a>             <em class="comment">// wait until at least ENOUGH_TO_START_CRAWLING URIs queued</em>
<a name="263" href="#263">263</a>             recoveredEnough.await();