<a name="159" href="#159">159</a>         open(env, dbConfig);<a name="160" href="#160">160</a>     }<a name="161" href="#161">161</a> <a name="162" href="#162">162</a>     <em>/**<em>*</em></em><a name="163" href="#163">163</a> <em>     * @return DatabaseConfig to use</em><a name="164" href="#164">164</a> <em>     */</em><a name="165" href="#165">165</a>     <strong>protected</strong> DatabaseConfig getDatabaseConfig() {<a name="166" href="#166">166</a>         DatabaseConfig dbConfig = <strong>new</strong> DatabaseConfig();<a name="167" href="#167">167</a>         dbConfig.setDeferredWrite(<strong>true</strong>);<a name="168" href="#168">168</a>         <strong>return</strong> dbConfig;<a name="169" href="#169">169</a>     }<a name="170" href="#170">170</a>     <a name="171" href="#171">171</a>     <em>/**<em>*</em></em><a name="172" href="#172">172</a> <em>     * Call after deserializing an instance of this class.  Will open the</em><a name="173" href="#173">173</a> <em>     * already seen in passed environment.</em><a name="174" href="#174">174</a> <em>     * @param env DB Environment to use.</em><a name="175" href="#175">175</a> <em>     * @throws DatabaseException</em><a name="176" href="#176">176</a> <em>     */</em><a name="177" href="#177">177</a>     <strong>public</strong> <strong>void</strong> reopen(<strong>final</strong> Environment env)<a name="178" href="#178">178</a>     throws DatabaseException {<a name="179" href="#179">179</a>         DatabaseConfig dbConfig = getDatabaseConfig();<a name="180" href="#180">180</a>         open(env, dbConfig);<a name="181" href="#181">181</a>     }<a name="182" href="#182">182</a>     <a name="183" href="#183">183</a>     <strong>protected</strong> <strong>void</strong> open(<strong>final</strong> Environment env, <strong>final</strong> DatabaseConfig dbConfig)<a name="184" href="#184">184</a>     throws DatabaseException {<a name="185" href="#185">185</a>         <strong>this</strong>.alreadySeen = env.openDatabase(<strong>null</strong>, DB_NAME, dbConfig);<a name="186" href="#186">186</a>     }<a name="187" href="#187">187</a>     <a name="188" href="#188">188</a>     <strong>public</strong> <strong>synchronized</strong> <strong>void</strong> close() {<a name="189" href="#189">189</a>         Environment env = <strong>null</strong>;<a name="190" href="#190">190</a>         <strong>if</strong> (<strong>this</strong>.alreadySeen != <strong>null</strong>) {<a name="191" href="#191">191</a>         	<strong>try</strong> {<a name="192" href="#192">192</a>                 env = <strong>this</strong>.alreadySeen.getEnvironment();<a name="193" href="#193">193</a>                 <strong>if</strong> (logger.isLoggable(Level.INFO)) {<a name="194" href="#194">194</a>                     logger.info(<span class="string">"Count of alreadyseen on close "</span> +<a name="195" href="#195">195</a>                         Long.toString(count));<a name="196" href="#196">196</a>                 }<a name="197" href="#197">197</a>                 <strong>this</strong>.alreadySeen.sync();<a name="198" href="#198">198</a> 				<strong>this</strong>.alreadySeen.close();<a name="199" href="#199">199</a> 			} <strong>catch</strong> (DatabaseException e) {<a name="200" href="#200">200</a> 				logger.severe(e.getMessage());<a name="201" href="#201">201</a> 			}<a name="202" href="#202">202</a>             <strong>this</strong>.alreadySeen = <strong>null</strong>;<a name="203" href="#203">203</a>         }<a name="204" href="#204">204</a>         <strong>if</strong> (env != <strong>null</strong> &amp;&amp; createdEnvironment) {<a name="205" href="#205">205</a>             <strong>try</strong> {<a name="206" href="#206">206</a> 				<em class="comment">// This sync flushes whats in RAM.  Its expensive operation.</em><a name="207" href="#207">207</a> 				<em class="comment">// Without, data can be lost.  Not for transactional operation.</em><a name="208" href="#208">208</a> 				env.sync();<a name="209" href="#209">209</a> 				env.close();<a name="210" href="#210">210</a> 			} <strong>catch</strong> (DatabaseException e) {<a name="211" href="#211">211</a> 				logger.severe(e.getMessage());<a name="212" href="#212">212</a> 			}<a name="213" href="#213">213</a>         }<a name="214" href="#214">214</a>     }<a name="215" href="#215">215</a>     <a name="216" href="#216">216</a>     <strong>public</strong> <strong>synchronized</strong> <strong>long</strong> getCacheMisses() throws DatabaseException {<a name="217" href="#217">217</a>         <strong>long</strong> cacheMiss = <strong>this</strong>.alreadySeen.getEnvironment().<a name="218" href="#218">218</a>             getStats(<strong>null</strong>).getNCacheMiss();<a name="219" href="#219">219</a>         <strong>this</strong>.lastCacheMissDiff = cacheMiss - <strong>this</strong>.lastCacheMiss;<a name="220" href="#220">220</a>         <strong>this</strong>.lastCacheMiss = cacheMiss;<a name="221" href="#221">221</a>         <strong>return</strong> <strong>this</strong>.lastCacheMiss;<a name="222" href="#222">222</a>     }<a name="223" href="#223">223</a>     <a name="224" href="#224">224</a>     <strong>public</strong> <strong>long</strong> getLastCacheMissDiff() {<a name="225" href="#225">225</a>         <strong>return</strong> <strong>this</strong>.lastCacheMissDiff;<a name="226" href="#226">226</a>     }<a name="227" href="#227">227</a>     <a name="228" href="#228">228</a>     <em>/**<em>*</em></em><a name="229" href="#229">229</a> <em>     * Create fingerprint.</em><a name="230" href="#230">230</a> <em>     * Pubic access so test code can access createKey.</em><a name="231" href="#231">231</a> <em>     * @param uri URI to fingerprint.</em><a name="232" href="#232">232</a> <em>     * @return Fingerprint of passed &lt;code>url&lt;/code>.</em><a name="233" href="#233">233</a> <em>     */</em><a name="234" href="#234">234</a>     <strong>public</strong> <strong>static</strong> <strong>long</strong> createKey(CharSequence uri) {<a name="235" href="#235">235</a>         String url = uri.toString();<a name="236" href="#236">236</a>         <strong>int</strong> index = url.indexOf(COLON_SLASH_SLASH);<a name="237" href="#237">237</a>         <strong>if</strong> (index > 0) {<a name="238" href="#238">238</a>             index = url.indexOf('/', index + COLON_SLASH_SLASH.length());<a name="239" href="#239">239</a>         }<a name="240" href="#240">240</a>         CharSequence hostPlusScheme = (index == -1)? url: url.subSequence(0, index);<a name="241" href="#241">241</a>         <strong>long</strong> tmp = FPGenerator.std24.fp(hostPlusScheme);<a name="242" href="#242">242</a>         <strong>return</strong> tmp | (FPGenerator.std40.fp(url) >>> 24);<a name="243" href="#243">243</a>     }<a name="244" href="#244">244</a> <a name="245" href="#245">245</a> <a name="246" href="#246">246</a> <a name="247" href="#247">247</a>     <strong>protected</strong> <strong>boolean</strong> setAdd(CharSequence uri) {<a name="248" href="#248">248</a>         DatabaseEntry key = <strong>new</strong> DatabaseEntry();<a name="249" href="#249">249</a>         LongBinding.longToEntry(createKey(uri), key);<a name="250" href="#250">250</a>         <strong>long</strong> started = 0;<a name="251" href="#251">251</a>         <a name="252" href="#252">252</a>         OperationStatus status = <strong>null</strong>;<a name="253" href="#253">253</a>         <strong>try</strong> {<a name="254" href="#254">254</a>             <strong>if</strong> (logger.isLoggable(Level.INFO)) {<a name="255" href="#255">255</a>                 started = System.currentTimeMillis();<a name="256" href="#256">256</a>             }<a name="257" href="#257">257</a>             status = alreadySeen.putNoOverwrite(<strong>null</strong>, key, ZERO_LENGTH_ENTRY);<a name="258" href="#258">258</a>             <strong>if</strong> (logger.isLoggable(Level.INFO)) {<a name="259" href="#259">259</a>                 aggregatedLookupTime +=<a name="260" href="#260">260</a>                     (System.currentTimeMillis() - started);<a name="261" href="#261">261</a>             }<a name="262" href="#262">262</a>         } <strong>catch</strong> (DatabaseException e) {<a name="263" href="#263">263</a>             logger.severe(e.getMessage());<a name="264" href="#264">264</a>         }<a name="265" href="#265">265</a>         <strong>if</strong> (status == OperationStatus.SUCCESS) {<a name="266" href="#266">266</a>             count++;<a name="267" href="#267">267</a>             <strong>if</strong> (logger.isLoggable(Level.INFO)) {<a name="268" href="#268">268</a>                 <strong>final</strong> <strong>int</strong> logAt = 10000;<a name="269" href="#269">269</a>                 <strong>if</strong> (count > 0 &amp;&amp; ((count % logAt) == 0)) {<a name="270" href="#270">270</a>                     logger.info(<span class="string">"Average lookup "</span> +<a name="271" href="#271">271</a>                         (aggregatedLookupTime / logAt) + <span class="string">"ms."</span>);<a name="272" href="#272">272</a>                     aggregatedLookupTime = 0;<a name="273" href="#273">273</a>                 }<a name="274" href="#274">274</a>             }<a name="275" href="#275">275</a>         }<a name="276" href="#276">276</a>         <strong>if</strong>(status == OperationStatus.KEYEXIST) {<a name="277" href="#277">277</a>             <strong>return</strong> false; <em class="comment">// not added</em><a name="278" href="#278">278</a>         } <strong>else</strong> {<a name="279" href="#279">279</a>             <strong>return</strong> <strong>true</strong>;<a name="280" href="#280">280</a>         }<a name="281" href="#281">281</a>     }<a name="282" href="#282">282</a> <a name="283" href="#283">283</a>     <strong>protected</strong> <strong>long</strong> setCount() {<a name="284" href="#284">284</a>         <strong>return</strong> count;<a name="285" href="#285">285</a>     }<a name="286" href="#286">286</a> <a name="287" href="#287">287</a>     <strong>protected</strong> <strong>boolean</strong> setRemove(CharSequence uri) {<a name="288" href="#288">288</a>         DatabaseEntry key = <strong>new</strong> DatabaseEntry();<a name="289" href="#289">289</a>         LongBinding.longToEntry(createKey(uri), key);<a name="290" href="#290">290</a>             OperationStatus status = <strong>null</strong>;<a name="291" href="#291">291</a>         <strong>try</strong> {<a name="292" href="#292">292</a>             status = alreadySeen.delete(<strong>null</strong>, key);<a name="293" href="#293">293</a>         } <strong>catch</strong> (DatabaseException e) {<a name="294" href="#294">294</a>             logger.severe(e.getMessage());<a name="295" href="#295">295</a>         }<a name="296" href="#296">296</a>         <strong>if</strong> (status == OperationStatus.SUCCESS) {<a name="297" href="#297">297</a>             count--;<a name="298" href="#298">298</a>             <strong>return</strong> <strong>true</strong>; <em class="comment">// removed</em><a name="299" href="#299">299</a>         } <strong>else</strong> {<a name="300" href="#300">300</a>             <strong>return</strong> false; <em class="comment">// not present</em><a name="301" href="#301">301</a>         }<a name="302" href="#302">302</a>     }<a name="303" href="#303">303</a> <a name="304" href="#304">304</a>     <strong>public</strong> <strong>long</strong> flush() {<a name="305" href="#305">305</a>     	    <em class="comment">// We always write but this might be place to do the sync</em><a name="306" href="#306">306</a>         <em class="comment">// when checkpointing?  TODO.</em><a name="307" href="#307">307</a>         <strong>return</strong> 0;<a name="308" href="#308">308</a>     }<a name="309" href="#309">309</a>     <a name="310" href="#310">310</a>     <strong>private</strong> <strong>void</strong> writeObject(ObjectOutputStream oos) throws IOException {<a name="311" href="#311">311</a>         <em class="comment">// sync deferred-write database</em><a name="312" href="#312">312</a>         <strong>try</strong> {<a name="313" href="#313">313</a>             alreadySeen.sync();<a name="314" href="#314">314</a>         } <strong>catch</strong> (DatabaseException e) {<a name="315" href="#315">315</a>             <em class="comment">// TODO Auto-generated catch block</em><a name="316" href="#316">316</a>             <strong>throw</strong> <strong>new</strong> RuntimeException(e);<a name="317" href="#317">317</a>         }<a name="318" href="#318">318</a>         oos.defaultWriteObject();<a name="319" href="#319">319</a>     }<a name="320" href="#320">320</a> }</pre><hr/><div id="footer">This page was automatically generated by <a href="http://maven.apache.org/">Maven</a></div></body></html>