unorderedthreadpoolexecutor.html

MINA+API 关于MINA的API

<a name="372" href="#372">372</a>     @Override
<a name="373" href="#373">373</a>     <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">boolean</strong> remove(Runnable task) {
<a name="374" href="#374">374</a>         <strong class="jxr_keyword">boolean</strong> removed = <strong class="jxr_keyword">super</strong>.remove(task);
<a name="375" href="#375">375</a>         <strong class="jxr_keyword">if</strong> (removed) {
<a name="376" href="#376">376</a>             getQueueHandler().polled(<strong class="jxr_keyword">this</strong>, (IoEvent) task);
<a name="377" href="#377">377</a>         }
<a name="378" href="#378">378</a>         <strong class="jxr_keyword">return</strong> removed;
<a name="379" href="#379">379</a>     }
<a name="380" href="#380">380</a> 
<a name="381" href="#381">381</a>     @Override
<a name="382" href="#382">382</a>     <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">int</strong> getCorePoolSize() {
<a name="383" href="#383">383</a>         <strong class="jxr_keyword">return</strong> corePoolSize;
<a name="384" href="#384">384</a>     }
<a name="385" href="#385">385</a> 
<a name="386" href="#386">386</a>     @Override
<a name="387" href="#387">387</a>     <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">void</strong> setCorePoolSize(<strong class="jxr_keyword">int</strong> corePoolSize) {
<a name="388" href="#388">388</a>         <strong class="jxr_keyword">if</strong> (corePoolSize &lt; 0) {
<a name="389" href="#389">389</a>             <strong class="jxr_keyword">throw</strong> <strong class="jxr_keyword">new</strong> IllegalArgumentException(<span class="jxr_string">"corePoolSize: "</span> + corePoolSize);
<a name="390" href="#390">390</a>         }
<a name="391" href="#391">391</a>         <strong class="jxr_keyword">if</strong> (corePoolSize &gt; maximumPoolSize) {
<a name="392" href="#392">392</a>             <strong class="jxr_keyword">throw</strong> <strong class="jxr_keyword">new</strong> IllegalArgumentException(<span class="jxr_string">"corePoolSize exceeds maximumPoolSize"</span>);
<a name="393" href="#393">393</a>         }
<a name="394" href="#394">394</a>                 
<a name="395" href="#395">395</a>         <strong class="jxr_keyword">synchronized</strong> (workers) {
<a name="396" href="#396">396</a>             <strong class="jxr_keyword">if</strong> (<strong class="jxr_keyword">this</strong>.corePoolSize &gt; corePoolSize) {
<a name="397" href="#397">397</a>                 <strong class="jxr_keyword">for</strong> (<strong class="jxr_keyword">int</strong> i = <strong class="jxr_keyword">this</strong>.corePoolSize - corePoolSize; i &gt; 0; i --) {
<a name="398" href="#398">398</a>                     removeWorker();
<a name="399" href="#399">399</a>                 }
<a name="400" href="#400">400</a>             }
<a name="401" href="#401">401</a>             <strong class="jxr_keyword">this</strong>.corePoolSize = corePoolSize;
<a name="402" href="#402">402</a>         }
<a name="403" href="#403">403</a>     }
<a name="404" href="#404">404</a>     
<a name="405" href="#405">405</a>     <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">class</strong> <a href="../../../../../org/apache/mina/common/AbstractPollingConnectionlessIoAcceptor.html">Worker</a> implements Runnable {
<a name="406" href="#406">406</a>         
<a name="407" href="#407">407</a>         <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">volatile</strong> <strong class="jxr_keyword">long</strong> completedTaskCount;
<a name="408" href="#408">408</a>         <strong class="jxr_keyword">private</strong> Thread thread;
<a name="409" href="#409">409</a>         
<a name="410" href="#410">410</a>         <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">void</strong> run() {
<a name="411" href="#411">411</a>             thread = Thread.currentThread();
<a name="412" href="#412">412</a>             
<a name="413" href="#413">413</a>             <strong class="jxr_keyword">try</strong> {
<a name="414" href="#414">414</a>                 <strong class="jxr_keyword">for</strong> (;;) {
<a name="415" href="#415">415</a>                     Runnable task = fetchTask();
<a name="416" href="#416">416</a>                     
<a name="417" href="#417">417</a>                     idleWorkers.decrementAndGet();
<a name="418" href="#418">418</a>                     
<a name="419" href="#419">419</a>                     <strong class="jxr_keyword">if</strong> (task == <strong class="jxr_keyword">null</strong>) {
<a name="420" href="#420">420</a>                         <strong class="jxr_keyword">synchronized</strong> (workers) {
<a name="421" href="#421">421</a>                             <strong class="jxr_keyword">if</strong> (workers.size() &gt; corePoolSize) {
<a name="422" href="#422">422</a>                                 <em class="jxr_comment">// Remove now to prevent duplicate exit.</em>
<a name="423" href="#423">423</a>                                 workers.remove(<strong class="jxr_keyword">this</strong>);
<a name="424" href="#424">424</a>                                 <strong class="jxr_keyword">break</strong>;
<a name="425" href="#425">425</a>                             }
<a name="426" href="#426">426</a>                         }
<a name="427" href="#427">427</a>                     }
<a name="428" href="#428">428</a>                     
<a name="429" href="#429">429</a>                     <strong class="jxr_keyword">if</strong> (task == EXIT_SIGNAL) {
<a name="430" href="#430">430</a>                         <strong class="jxr_keyword">break</strong>;
<a name="431" href="#431">431</a>                     }
<a name="432" href="#432">432</a>                     
<a name="433" href="#433">433</a>                     queueHandler.polled(UnorderedThreadPoolExecutor.<strong class="jxr_keyword">this</strong>, (IoEvent) task);
<a name="434" href="#434">434</a>                     <strong class="jxr_keyword">try</strong> {
<a name="435" href="#435">435</a>                         runTask(task);
<a name="436" href="#436">436</a>                     } <strong class="jxr_keyword">finally</strong> {
<a name="437" href="#437">437</a>                         idleWorkers.incrementAndGet();
<a name="438" href="#438">438</a>                     }
<a name="439" href="#439">439</a>                 }
<a name="440" href="#440">440</a>             } <strong class="jxr_keyword">finally</strong> {
<a name="441" href="#441">441</a>                 <strong class="jxr_keyword">synchronized</strong> (workers) {
<a name="442" href="#442">442</a>                     workers.remove(<strong class="jxr_keyword">this</strong>);
<a name="443" href="#443">443</a>                     UnorderedThreadPoolExecutor.<strong class="jxr_keyword">this</strong>.completedTaskCount += completedTaskCount;
<a name="444" href="#444">444</a>                     workers.notifyAll();
<a name="445" href="#445">445</a>                 }
<a name="446" href="#446">446</a>             }
<a name="447" href="#447">447</a>         }
<a name="448" href="#448">448</a> 
<a name="449" href="#449">449</a>         <strong class="jxr_keyword">private</strong> Runnable fetchTask() {
<a name="450" href="#450">450</a>             Runnable task = <strong class="jxr_keyword">null</strong>;
<a name="451" href="#451">451</a>             <strong class="jxr_keyword">long</strong> currentTime = System.currentTimeMillis();
<a name="452" href="#452">452</a>             <strong class="jxr_keyword">long</strong> deadline = currentTime + getKeepAliveTime(TimeUnit.MILLISECONDS);
<a name="453" href="#453">453</a>             <strong class="jxr_keyword">for</strong> (;;) {
<a name="454" href="#454">454</a>                 <strong class="jxr_keyword">try</strong> {
<a name="455" href="#455">455</a>                     <strong class="jxr_keyword">long</strong> waitTime = deadline - currentTime;
<a name="456" href="#456">456</a>                     <strong class="jxr_keyword">if</strong> (waitTime &lt;= 0) {
<a name="457" href="#457">457</a>                         <strong class="jxr_keyword">break</strong>;
<a name="458" href="#458">458</a>                     }
<a name="459" href="#459">459</a> 
<a name="460" href="#460">460</a>                     <strong class="jxr_keyword">try</strong> {
<a name="461" href="#461">461</a>                         task = getQueue().poll(waitTime, TimeUnit.MILLISECONDS);
<a name="462" href="#462">462</a>                         <strong class="jxr_keyword">break</strong>;
<a name="463" href="#463">463</a>                     } <strong class="jxr_keyword">finally</strong> {
<a name="464" href="#464">464</a>                         <strong class="jxr_keyword">if</strong> (task == <strong class="jxr_keyword">null</strong>) {
<a name="465" href="#465">465</a>                             currentTime = System.currentTimeMillis();
<a name="466" href="#466">466</a>                         }
<a name="467" href="#467">467</a>                     }
<a name="468" href="#468">468</a>                 } <strong class="jxr_keyword">catch</strong> (InterruptedException e) {
<a name="469" href="#469">469</a>                     <em class="jxr_comment">// Ignore.</em>
<a name="470" href="#470">470</a>                     <strong class="jxr_keyword">continue</strong>;
<a name="471" href="#471">471</a>                 }
<a name="472" href="#472">472</a>             }
<a name="473" href="#473">473</a>             <strong class="jxr_keyword">return</strong> task;
<a name="474" href="#474">474</a>         }
<a name="475" href="#475">475</a> 
<a name="476" href="#476">476</a>         <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">void</strong> runTask(Runnable task) {
<a name="477" href="#477">477</a>             beforeExecute(thread, task);
<a name="478" href="#478">478</a>             <strong class="jxr_keyword">boolean</strong> ran = false;
<a name="479" href="#479">479</a>             <strong class="jxr_keyword">try</strong> {
<a name="480" href="#480">480</a>                 task.run();
<a name="481" href="#481">481</a>                 ran = <strong class="jxr_keyword">true</strong>;
<a name="482" href="#482">482</a>                 afterExecute(task, <strong class="jxr_keyword">null</strong>);
<a name="483" href="#483">483</a>                 completedTaskCount ++;
<a name="484" href="#484">484</a>             } <strong class="jxr_keyword">catch</strong> (RuntimeException e) {
<a name="485" href="#485">485</a>                 <strong class="jxr_keyword">if</strong> (!ran)
<a name="486" href="#486">486</a>                     afterExecute(task, e);
<a name="487" href="#487">487</a>                 <strong class="jxr_keyword">throw</strong> e;
<a name="488" href="#488">488</a>             }
<a name="489" href="#489">489</a>         }
<a name="490" href="#490">490</a>     }
<a name="491" href="#491">491</a> }
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