stackkeyedobjectpool.html

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<a name="171" href="#171">171</a>             }
<a name="172" href="#172">172</a>         } <strong>else</strong> {
<a name="173" href="#173">173</a>             <strong>if</strong>(<strong>null</strong> != _factory) {
<a name="174" href="#174">174</a>                 _factory.destroyObject(key,obj);
<a name="175" href="#175">175</a>             }
<a name="176" href="#176">176</a>         }
<a name="177" href="#177">177</a>     }
<a name="178" href="#178">178</a> 
<a name="179" href="#179">179</a>     <strong>public</strong> <strong>synchronized</strong> <strong>void</strong> invalidateObject(Object key, Object obj) throws Exception {
<a name="180" href="#180">180</a>         decrementActiveCount(key);
<a name="181" href="#181">181</a>         <strong>if</strong>(<strong>null</strong> != _factory) {
<a name="182" href="#182">182</a>             _factory.destroyObject(key,obj);
<a name="183" href="#183">183</a>         }
<a name="184" href="#184">184</a>         notifyAll(); <em class="comment">// _totalActive has changed</em>
<a name="185" href="#185">185</a>     }
<a name="186" href="#186">186</a> 
<a name="187" href="#187">187</a>     <strong>public</strong> <strong>synchronized</strong> <strong>void</strong> addObject(Object key) throws Exception {
<a name="188" href="#188">188</a>         Object obj = _factory.makeObject(key);
<a name="189" href="#189">189</a>         incrementActiveCount(key); <em class="comment">// returnObject will decrement this</em>
<a name="190" href="#190">190</a>         returnObject(key,obj);
<a name="191" href="#191">191</a>     }
<a name="192" href="#192">192</a> 
<a name="193" href="#193">193</a>     <strong>public</strong> <strong>int</strong> getNumIdle() {
<a name="194" href="#194">194</a>         <strong>return</strong> _totIdle;
<a name="195" href="#195">195</a>     }
<a name="196" href="#196">196</a> 
<a name="197" href="#197">197</a>     <strong>public</strong> <strong>int</strong> getNumActive() {
<a name="198" href="#198">198</a>         <strong>return</strong> _totActive;
<a name="199" href="#199">199</a>     }
<a name="200" href="#200">200</a> 
<a name="201" href="#201">201</a>     <strong>public</strong> <strong>synchronized</strong> <strong>int</strong> getNumActive(Object key) {
<a name="202" href="#202">202</a>         <strong>return</strong> getActiveCount(key);
<a name="203" href="#203">203</a>     }
<a name="204" href="#204">204</a> 
<a name="205" href="#205">205</a>     <strong>public</strong> <strong>synchronized</strong> <strong>int</strong> getNumIdle(Object key) {
<a name="206" href="#206">206</a>         <strong>try</strong> {
<a name="207" href="#207">207</a>             <strong>return</strong>((Stack)(_pools.get(key))).size();
<a name="208" href="#208">208</a>         } <strong>catch</strong>(Exception e) {
<a name="209" href="#209">209</a>             <strong>return</strong> 0;
<a name="210" href="#210">210</a>         }
<a name="211" href="#211">211</a>     }
<a name="212" href="#212">212</a> 
<a name="213" href="#213">213</a>     <strong>public</strong> <strong>synchronized</strong> <strong>void</strong> clear() {
<a name="214" href="#214">214</a>         Iterator it = _pools.keySet().iterator();
<a name="215" href="#215">215</a>         <strong>while</strong>(it.hasNext()) {
<a name="216" href="#216">216</a>             Object key = it.next();
<a name="217" href="#217">217</a>             Stack stack = (Stack)(_pools.get(key));
<a name="218" href="#218">218</a>             destroyStack(key,stack);
<a name="219" href="#219">219</a>         }
<a name="220" href="#220">220</a>         _totIdle = 0;
<a name="221" href="#221">221</a>         _pools.clear();
<a name="222" href="#222">222</a>         _activeCount.clear();
<a name="223" href="#223">223</a>     }
<a name="224" href="#224">224</a> 
<a name="225" href="#225">225</a>     <strong>public</strong> <strong>synchronized</strong> <strong>void</strong> clear(Object key) {
<a name="226" href="#226">226</a>         Stack stack = (Stack)(_pools.remove(key));
<a name="227" href="#227">227</a>         destroyStack(key,stack);
<a name="228" href="#228">228</a>     }
<a name="229" href="#229">229</a> 
<a name="230" href="#230">230</a>     <strong>private</strong> <strong>synchronized</strong> <strong>void</strong> destroyStack(Object key, Stack stack) {
<a name="231" href="#231">231</a>         <strong>if</strong>(<strong>null</strong> == stack) {
<a name="232" href="#232">232</a>             <strong>return</strong>;
<a name="233" href="#233">233</a>         } <strong>else</strong> {
<a name="234" href="#234">234</a>             <strong>if</strong>(<strong>null</strong> != _factory) {
<a name="235" href="#235">235</a>                 Iterator it = stack.iterator();
<a name="236" href="#236">236</a>                 <strong>while</strong>(it.hasNext()) {
<a name="237" href="#237">237</a>                     <strong>try</strong> {
<a name="238" href="#238">238</a>                         _factory.destroyObject(key,it.next());
<a name="239" href="#239">239</a>                     } <strong>catch</strong>(Exception e) {
<a name="240" href="#240">240</a>                         <em class="comment">// ignore error, keep destroying the rest</em>
<a name="241" href="#241">241</a>                     }
<a name="242" href="#242">242</a>                 }
<a name="243" href="#243">243</a>             }
<a name="244" href="#244">244</a>             _totIdle -= stack.size();
<a name="245" href="#245">245</a>             _activeCount.remove(key);
<a name="246" href="#246">246</a>             stack.clear();
<a name="247" href="#247">247</a>         }
<a name="248" href="#248">248</a>     }
<a name="249" href="#249">249</a> 
<a name="250" href="#250">250</a>     <strong>public</strong> <strong>synchronized</strong> String toString() {
<a name="251" href="#251">251</a>         StringBuffer buf = <strong>new</strong> StringBuffer();
<a name="252" href="#252">252</a>         buf.append(getClass().getName());
<a name="253" href="#253">253</a>         buf.append(<span class="string">" contains "</span>).append(_pools.size()).append(<span class="string">" distinct pools: "</span>);
<a name="254" href="#254">254</a>         Iterator it = _pools.keySet().iterator();
<a name="255" href="#255">255</a>         <strong>while</strong>(it.hasNext()) {
<a name="256" href="#256">256</a>             Object key = it.next();
<a name="257" href="#257">257</a>             buf.append(<span class="string">" |"</span>).append(key).append(<span class="string">"|="</span>);
<a name="258" href="#258">258</a>             Stack s = (Stack)(_pools.get(key));
<a name="259" href="#259">259</a>             buf.append(s.size());
<a name="260" href="#260">260</a>         }
<a name="261" href="#261">261</a>         <strong>return</strong> buf.toString();
<a name="262" href="#262">262</a>     }
<a name="263" href="#263">263</a> 
<a name="264" href="#264">264</a>     <strong>public</strong> <strong>synchronized</strong> <strong>void</strong> close() throws Exception {
<a name="265" href="#265">265</a>         clear();
<a name="266" href="#266">266</a>         _pools = <strong>null</strong>;
<a name="267" href="#267">267</a>         _factory = <strong>null</strong>;
<a name="268" href="#268">268</a>         _activeCount = <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> <strong>synchronized</strong> <strong>void</strong> setFactory(<a href="../../../../../org/apache/commons/pool/KeyedPoolableObjectFactory.html">KeyedPoolableObjectFactory</a> factory) throws IllegalStateException {
<a name="272" href="#272">272</a>         <strong>if</strong>(0 &lt; getNumActive()) {
<a name="273" href="#273">273</a>             <strong>throw</strong> <strong>new</strong> IllegalStateException(<span class="string">"Objects are already active"</span>);
<a name="274" href="#274">274</a>         } <strong>else</strong> {
<a name="275" href="#275">275</a>             clear();
<a name="276" href="#276">276</a>             _factory = factory;
<a name="277" href="#277">277</a>         }
<a name="278" href="#278">278</a>     }
<a name="279" href="#279">279</a> 
<a name="280" href="#280">280</a>     <strong>private</strong> <strong>int</strong> getActiveCount(Object key) {
<a name="281" href="#281">281</a>         <strong>try</strong> {
<a name="282" href="#282">282</a>             <strong>return</strong> ((Integer)_activeCount.get(key)).intValue();
<a name="283" href="#283">283</a>         } <strong>catch</strong>(NoSuchElementException e) {
<a name="284" href="#284">284</a>             <strong>return</strong> 0;
<a name="285" href="#285">285</a>         } <strong>catch</strong>(NullPointerException e) {
<a name="286" href="#286">286</a>             <strong>return</strong> 0;
<a name="287" href="#287">287</a>         }
<a name="288" href="#288">288</a>     }
<a name="289" href="#289">289</a> 
<a name="290" href="#290">290</a>     <strong>private</strong> <strong>void</strong> incrementActiveCount(Object key) {
<a name="291" href="#291">291</a>         _totActive++;
<a name="292" href="#292">292</a>         Integer old = (Integer)(_activeCount.get(key));
<a name="293" href="#293">293</a>         <strong>if</strong>(<strong>null</strong> == old) { 
<a name="294" href="#294">294</a>             _activeCount.put(key,<strong>new</strong> Integer(1));
<a name="295" href="#295">295</a>         } <strong>else</strong> {
<a name="296" href="#296">296</a>             _activeCount.put(key,<strong>new</strong> Integer(old.intValue() + 1));
<a name="297" href="#297">297</a>         }
<a name="298" href="#298">298</a>     }
<a name="299" href="#299">299</a> 
<a name="300" href="#300">300</a>     <strong>private</strong> <strong>void</strong> decrementActiveCount(Object key) {
<a name="301" href="#301">301</a>         _totActive--;
<a name="302" href="#302">302</a>         Integer active = (Integer)(_activeCount.get(key));
<a name="303" href="#303">303</a>         <strong>if</strong>(<strong>null</strong> == active) {
<a name="304" href="#304">304</a>             <em class="comment">// do nothing, either null or zero is OK</em>
<a name="305" href="#305">305</a>         } <strong>else</strong> <strong>if</strong>(active.intValue() &lt;= 1) {
<a name="306" href="#306">306</a>             _activeCount.remove(key);
<a name="307" href="#307">307</a>         } <strong>else</strong> {
<a name="308" href="#308">308</a>             _activeCount.put(key, <strong>new</strong> Integer(active.intValue() - 1));
<a name="309" href="#309">309</a>         }
<a name="310" href="#310">310</a>     }
<a name="311" href="#311">311</a> 
<a name="312" href="#312">312</a>     <em>/**<em>* The default cap on the number of "sleeping" instances in the pool. */</em></em>
<a name="313" href="#313">313</a>     <strong>protected</strong> <strong>static</strong> <strong>final</strong> <strong>int</strong> DEFAULT_MAX_SLEEPING  = 8;
<a name="314" href="#314">314</a> 
<a name="315" href="#315">315</a>     <em>/**<em>*</em></em>
<a name="316" href="#316">316</a> <em>     * The default initial size of the pool</em>
<a name="317" href="#317">317</a> <em>     * (this specifies the size of the container, it does not</em>
<a name="318" href="#318">318</a> <em>     * cause the pool to be pre-populated.)</em>
<a name="319" href="#319">319</a> <em>     */</em>
<a name="320" href="#320">320</a>     <strong>protected</strong> <strong>static</strong> <strong>final</strong> <strong>int</strong> DEFAULT_INIT_SLEEPING_CAPACITY = 4;
<a name="321" href="#321">321</a> 
<a name="322" href="#322">322</a>     <em>/**<em>* My named-set of pools. */</em></em>
<a name="323" href="#323">323</a>     <strong>protected</strong> HashMap _pools = <strong>null</strong>;
<a name="324" href="#324">324</a> 
<a name="325" href="#325">325</a>     <em>/**<em>* My {@link KeyedPoolableObjectFactory}. */</em></em>
<a name="326" href="#326">326</a>     <strong>protected</strong> <a href="../../../../../org/apache/commons/pool/KeyedPoolableObjectFactory.html">KeyedPoolableObjectFactory</a> _factory = <strong>null</strong>;
<a name="327" href="#327">327</a> 
<a name="328" href="#328">328</a>     <em>/**<em>* The cap on the number of "sleeping" instances in &lt;i>each&lt;/i> pool. */</em></em>
<a name="329" href="#329">329</a>     <strong>protected</strong> <strong>int</strong> _maxSleeping = DEFAULT_MAX_SLEEPING;
<a name="330" href="#330">330</a> 
<a name="331" href="#331">331</a>     <em>/**<em>* The initial capacity of each pool. */</em></em>
<a name="332" href="#332">332</a>     <strong>protected</strong> <strong>int</strong> _initSleepingCapacity = DEFAULT_INIT_SLEEPING_CAPACITY;
<a name="333" href="#333">333</a> 
<a name="334" href="#334">334</a>     <em>/**<em>* Total number of object borrowed and not yet retuened for all pools */</em></em>
<a name="335" href="#335">335</a>     <strong>protected</strong> <strong>int</strong> _totActive = 0;
<a name="336" href="#336">336</a> 
<a name="337" href="#337">337</a>     <em>/**<em>* Total number of objects "sleeping" for all pools */</em></em>
<a name="338" href="#338">338</a>     <strong>protected</strong> <strong>int</strong> _totIdle = 0;
<a name="339" href="#339">339</a> 
<a name="340" href="#340">340</a>     <em>/**<em>* Number of active objects borrowed and not yet returned by pool */</em></em>
<a name="341" href="#341">341</a>     <strong>protected</strong> HashMap _activeCount = <strong>null</strong>;
<a name="342" href="#342">342</a> 
<a name="343" href="#343">343</a> }
</pre>
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