abstractpollingioacceptor.html

MINA+API 关于MINA的API

<a name="132" href="#132">132</a>     <strong class="jxr_keyword">protected</strong> <strong class="jxr_keyword">abstract</strong> <strong class="jxr_keyword">boolean</strong> select() <strong class="jxr_keyword">throws</strong> Exception;
<a name="133" href="#133">133</a>     <strong class="jxr_keyword">protected</strong> <strong class="jxr_keyword">abstract</strong> <strong class="jxr_keyword">void</strong> wakeup();
<a name="134" href="#134">134</a>     <strong class="jxr_keyword">protected</strong> <strong class="jxr_keyword">abstract</strong> Iterator&lt;H&gt; selectedHandles();
<a name="135" href="#135">135</a>     <strong class="jxr_keyword">protected</strong> <strong class="jxr_keyword">abstract</strong> H open(SocketAddress localAddress) <strong class="jxr_keyword">throws</strong> Exception;
<a name="136" href="#136">136</a>     <strong class="jxr_keyword">protected</strong> <strong class="jxr_keyword">abstract</strong> SocketAddress localAddress(H handle) <strong class="jxr_keyword">throws</strong> Exception;
<a name="137" href="#137">137</a>     <strong class="jxr_keyword">protected</strong> <strong class="jxr_keyword">abstract</strong> T accept(IoProcessor&lt;T&gt; processor, H handle) <strong class="jxr_keyword">throws</strong> Exception;
<a name="138" href="#138">138</a>     <strong class="jxr_keyword">protected</strong> <strong class="jxr_keyword">abstract</strong> <strong class="jxr_keyword">void</strong> close(H handle) <strong class="jxr_keyword">throws</strong> Exception;
<a name="139" href="#139">139</a> 
<a name="140" href="#140">140</a>     @Override
<a name="141" href="#141">141</a>     <strong class="jxr_keyword">protected</strong> <a href="../../../../org/apache/mina/common/IoFuture.html">IoFuture</a> dispose0() <strong class="jxr_keyword">throws</strong> Exception {
<a name="142" href="#142">142</a>         unbind();
<a name="143" href="#143">143</a>         <strong class="jxr_keyword">if</strong> (!disposalFuture.isDone()) {
<a name="144" href="#144">144</a>             <strong class="jxr_keyword">try</strong> {
<a name="145" href="#145">145</a>                 startupWorker();
<a name="146" href="#146">146</a>                 wakeup();
<a name="147" href="#147">147</a>             } <strong class="jxr_keyword">catch</strong> (RejectedExecutionException e) {
<a name="148" href="#148">148</a>                 <strong class="jxr_keyword">if</strong> (createdExecutor) {
<a name="149" href="#149">149</a>                     <em class="jxr_comment">// Ignore.</em>
<a name="150" href="#150">150</a>                 } <strong class="jxr_keyword">else</strong> {
<a name="151" href="#151">151</a>                     <strong class="jxr_keyword">throw</strong> e;
<a name="152" href="#152">152</a>                 }
<a name="153" href="#153">153</a>             }
<a name="154" href="#154">154</a>         }
<a name="155" href="#155">155</a>         <strong class="jxr_keyword">return</strong> disposalFuture;
<a name="156" href="#156">156</a>     }
<a name="157" href="#157">157</a> 
<a name="158" href="#158">158</a>     @Override
<a name="159" href="#159">159</a>     <strong class="jxr_keyword">protected</strong> <strong class="jxr_keyword">final</strong> Set&lt;SocketAddress&gt; bind0(List&lt;? <strong class="jxr_keyword">extends</strong> SocketAddress&gt; localAddresses) <strong class="jxr_keyword">throws</strong> Exception {
<a name="160" href="#160">160</a>         <a href="../../../../org/apache/mina/common/AbstractIoAcceptor.html">AcceptorOperationFuture</a> request = <strong class="jxr_keyword">new</strong> <a href="../../../../org/apache/mina/common/AbstractIoAcceptor.html">AcceptorOperationFuture</a>(localAddresses);
<a name="161" href="#161">161</a> 
<a name="162" href="#162">162</a>         <em class="jxr_comment">// adds the Registration request to the queue for the Workers</em>
<a name="163" href="#163">163</a>         <em class="jxr_comment">// to handle</em>
<a name="164" href="#164">164</a>         registerQueue.add(request);
<a name="165" href="#165">165</a> 
<a name="166" href="#166">166</a>         <em class="jxr_comment">// creates an instance of a Worker and has the local</em>
<a name="167" href="#167">167</a>         <em class="jxr_comment">// executor kick it off.</em>
<a name="168" href="#168">168</a>         startupWorker();
<a name="169" href="#169">169</a>         wakeup();
<a name="170" href="#170">170</a>         request.awaitUninterruptibly();
<a name="171" href="#171">171</a> 
<a name="172" href="#172">172</a>         <strong class="jxr_keyword">if</strong> (request.getException() != <strong class="jxr_keyword">null</strong>) {
<a name="173" href="#173">173</a>             <strong class="jxr_keyword">throw</strong> request.getException();
<a name="174" href="#174">174</a>         }
<a name="175" href="#175">175</a> 
<a name="176" href="#176">176</a>         <em class="jxr_comment">// Update the local addresses.</em>
<a name="177" href="#177">177</a>         <em class="jxr_comment">// setLocalAddresses() shouldn't be called from the worker thread</em>
<a name="178" href="#178">178</a>         <em class="jxr_comment">// because of deadlock.</em>
<a name="179" href="#179">179</a>         Set&lt;SocketAddress&gt; newLocalAddresses = <strong class="jxr_keyword">new</strong> HashSet&lt;SocketAddress&gt;();
<a name="180" href="#180">180</a>         <strong class="jxr_keyword">for</strong> (H handle: boundHandles.values()) {
<a name="181" href="#181">181</a>             newLocalAddresses.add(localAddress(handle));
<a name="182" href="#182">182</a>         }
<a name="183" href="#183">183</a> 
<a name="184" href="#184">184</a>         <strong class="jxr_keyword">return</strong> newLocalAddresses;
<a name="185" href="#185">185</a>     }
<a name="186" href="#186">186</a> 
<a name="187" href="#187">187</a>     <em class="jxr_javadoccomment">/**</em>
<a name="188" href="#188">188</a> <em class="jxr_javadoccomment">     * This method is called by the doBind() and doUnbind()</em>
<a name="189" href="#189">189</a> <em class="jxr_javadoccomment">     * methods.  If the worker object is not null, presumably</em>
<a name="190" href="#190">190</a> <em class="jxr_javadoccomment">     * the acceptor is starting up, then the worker object will</em>
<a name="191" href="#191">191</a> <em class="jxr_javadoccomment">     * be created and kicked off by the executor.  If the worker</em>
<a name="192" href="#192">192</a> <em class="jxr_javadoccomment">     * object is not null, probably already created and this class</em>
<a name="193" href="#193">193</a> <em class="jxr_javadoccomment">     * is now working, then nothing will happen and the method</em>
<a name="194" href="#194">194</a> <em class="jxr_javadoccomment">     * will just return.</em>
<a name="195" href="#195">195</a> <em class="jxr_javadoccomment">     */</em>
<a name="196" href="#196">196</a>     <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">void</strong> startupWorker() {
<a name="197" href="#197">197</a>         <strong class="jxr_keyword">if</strong> (!selectable) {
<a name="198" href="#198">198</a>             registerQueue.clear();
<a name="199" href="#199">199</a>             cancelQueue.clear();
<a name="200" href="#200">200</a>         }
<a name="201" href="#201">201</a> 
<a name="202" href="#202">202</a>         <strong class="jxr_keyword">synchronized</strong> (lock) {
<a name="203" href="#203">203</a>             <strong class="jxr_keyword">if</strong> (worker == <strong class="jxr_keyword">null</strong>) {
<a name="204" href="#204">204</a>                 worker = <strong class="jxr_keyword">new</strong> <a href="../../../../org/apache/mina/common/AbstractPollingConnectionlessIoAcceptor.html">Worker</a>();
<a name="205" href="#205">205</a>                 executor.execute(<strong class="jxr_keyword">new</strong> <a href="../../../../org/apache/mina/util/NamePreservingRunnable.html">NamePreservingRunnable</a>(worker, threadName));
<a name="206" href="#206">206</a>             }
<a name="207" href="#207">207</a>         }
<a name="208" href="#208">208</a>     }
<a name="209" href="#209">209</a> 
<a name="210" href="#210">210</a>     @Override
<a name="211" href="#211">211</a>     <strong class="jxr_keyword">protected</strong> <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">void</strong> unbind0(List&lt;? <strong class="jxr_keyword">extends</strong> SocketAddress&gt; localAddresses) <strong class="jxr_keyword">throws</strong> Exception {
<a name="212" href="#212">212</a>         <a href="../../../../org/apache/mina/common/AbstractIoAcceptor.html">AcceptorOperationFuture</a> future = <strong class="jxr_keyword">new</strong> <a href="../../../../org/apache/mina/common/AbstractIoAcceptor.html">AcceptorOperationFuture</a>(localAddresses);
<a name="213" href="#213">213</a> 
<a name="214" href="#214">214</a>         cancelQueue.add(future);
<a name="215" href="#215">215</a>         startupWorker();
<a name="216" href="#216">216</a>         wakeup();
<a name="217" href="#217">217</a> 
<a name="218" href="#218">218</a>         future.awaitUninterruptibly();
<a name="219" href="#219">219</a>         <strong class="jxr_keyword">if</strong> (future.getException() != <strong class="jxr_keyword">null</strong>) {
<a name="220" href="#220">220</a>             <strong class="jxr_keyword">throw</strong> future.getException();
<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 class="jxr_javadoccomment">/**</em>
<a name="225" href="#225">225</a> <em class="jxr_javadoccomment">     * This class is called by the startupWorker() method and is</em>
<a name="226" href="#226">226</a> <em class="jxr_javadoccomment">     * placed into a NamePreservingRunnable class.</em>
<a name="227" href="#227">227</a> <em class="jxr_javadoccomment">     */</em>
<a name="228" href="#228">228</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="229" href="#229">229</a>         <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">void</strong> run() {
<a name="230" href="#230">230</a>             <strong class="jxr_keyword">int</strong> nHandles = 0;
<a name="231" href="#231">231</a>             
<a name="232" href="#232">232</a>             <strong class="jxr_keyword">while</strong> (selectable) {
<a name="233" href="#233">233</a>                 <strong class="jxr_keyword">try</strong> {
<a name="234" href="#234">234</a>                     <em class="jxr_comment">// gets the number of keys that are ready to go</em>
<a name="235" href="#235">235</a>                     <strong class="jxr_keyword">boolean</strong> selected = select();
<a name="236" href="#236">236</a> 
<a name="237" href="#237">237</a>                     <em class="jxr_comment">// this actually sets the selector to OP_ACCEPT,</em>
<a name="238" href="#238">238</a>                     <em class="jxr_comment">// and binds to the port in which this class will</em>
<a name="239" href="#239">239</a>                     <em class="jxr_comment">// listen on</em>
<a name="240" href="#240">240</a>                     nHandles += registerHandles();
<a name="241" href="#241">241</a> 
<a name="242" href="#242">242</a>                     <strong class="jxr_keyword">if</strong> (selected) {
<a name="243" href="#243">243</a>                         processHandles(selectedHandles());
<a name="244" href="#244">244</a>                     }
<a name="245" href="#245">245</a> 
<a name="246" href="#246">246</a>                     <em class="jxr_comment">// check to see if any cancellation request has been made.</em>
<a name="247" href="#247">247</a>                     nHandles -= unregisterHandles();
<a name="248" href="#248">248</a> 
<a name="249" href="#249">249</a>                     <strong class="jxr_keyword">if</strong> (nHandles == 0) {
<a name="250" href="#250">250</a>                         <strong class="jxr_keyword">synchronized</strong> (lock) {
<a name="251" href="#251">251</a>                             <strong class="jxr_keyword">if</strong> (registerQueue.isEmpty() &amp;&amp;
<a name="252" href="#252">252</a>                                 cancelQueue.isEmpty()) {
<a name="253" href="#253">253</a>                                 worker = <strong class="jxr_keyword">null</strong>;
<a name="254" href="#254">254</a>                                 <strong class="jxr_keyword">break</strong>;
<a name="255" href="#255">255</a>                             }
<a name="256" href="#256">256</a>                         }
<a name="257" href="#257">257</a>                     }
<a name="258" href="#258">258</a>                 } <strong class="jxr_keyword">catch</strong> (Throwable e) {
<a name="259" href="#259">259</a>                     ExceptionMonitor.getInstance().exceptionCaught(e);
<a name="260" href="#260">260</a> 
<a name="261" href="#261">261</a>                     <strong class="jxr_keyword">try</strong> {
<a name="262" href="#262">262</a>                         Thread.sleep(1000);
<a name="263" href="#263">263</a>                     } <strong class="jxr_keyword">catch</strong> (InterruptedException e1) {
<a name="264" href="#264">264</a>                         ExceptionMonitor.getInstance().exceptionCaught(e1);
<a name="265" href="#265">265</a>                     }
<a name="266" href="#266">266</a>                 }
<a name="267" href="#267">267</a>             }
<a name="268" href="#268">268</a>             
<a name="269" href="#269">269</a>             <strong class="jxr_keyword">if</strong> (selectable &amp;&amp; isDisposing()) {
<a name="270" href="#270">270</a>                 selectable = false;
<a name="271" href="#271">271</a>                 <strong class="jxr_keyword">try</strong> {
<a name="272" href="#272">272</a>                     <strong class="jxr_keyword">if</strong> (createdProcessor) {