simpleioprocessorpool.html

MINA+API 关于MINA的API

<a name="128" href="#128">128</a>                     <strong class="jxr_keyword">try</strong> {
<a name="129" href="#129">129</a>                         processor = processorType.getConstructor(ExecutorService.<strong class="jxr_keyword">class</strong>).newInstance(executor);
<a name="130" href="#130">130</a>                     } <strong class="jxr_keyword">catch</strong> (NoSuchMethodException e) {
<a name="131" href="#131">131</a>                         <em class="jxr_comment">// To the next step...</em>
<a name="132" href="#132">132</a>                     }
<a name="133" href="#133">133</a>                     
<a name="134" href="#134">134</a>                     <strong class="jxr_keyword">if</strong> (processor == <strong class="jxr_keyword">null</strong>) {
<a name="135" href="#135">135</a>                         <strong class="jxr_keyword">try</strong> {
<a name="136" href="#136">136</a>                             processor = processorType.getConstructor(Executor.<strong class="jxr_keyword">class</strong>).newInstance(executor);
<a name="137" href="#137">137</a>                         } <strong class="jxr_keyword">catch</strong> (NoSuchMethodException e) {
<a name="138" href="#138">138</a>                             <em class="jxr_comment">// To the next step...</em>
<a name="139" href="#139">139</a>                         }
<a name="140" href="#140">140</a>                     }
<a name="141" href="#141">141</a>                     
<a name="142" href="#142">142</a>                     <strong class="jxr_keyword">if</strong> (processor == <strong class="jxr_keyword">null</strong>) {
<a name="143" href="#143">143</a>                         <strong class="jxr_keyword">try</strong> {
<a name="144" href="#144">144</a>                             processor = processorType.getConstructor().newInstance();
<a name="145" href="#145">145</a>                         } <strong class="jxr_keyword">catch</strong> (NoSuchMethodException e) {
<a name="146" href="#146">146</a>                             <em class="jxr_comment">// To the next step...</em>
<a name="147" href="#147">147</a>                         }
<a name="148" href="#148">148</a>                     }
<a name="149" href="#149">149</a>                 } <strong class="jxr_keyword">catch</strong> (RuntimeException e) {
<a name="150" href="#150">150</a>                     <strong class="jxr_keyword">throw</strong> e;
<a name="151" href="#151">151</a>                 } <strong class="jxr_keyword">catch</strong> (Exception e) {
<a name="152" href="#152">152</a>                     <strong class="jxr_keyword">throw</strong> <strong class="jxr_keyword">new</strong> <a href="../../../../org/apache/mina/common/RuntimeIoException.html">RuntimeIoException</a>(
<a name="153" href="#153">153</a>                             <span class="jxr_string">"Failed to create a new instance of "</span> + processorType.getName(), e);
<a name="154" href="#154">154</a>                 }
<a name="155" href="#155">155</a>                 
<a name="156" href="#156">156</a>                 <em class="jxr_comment">// Raise an exception if no proper constructor is found.</em>
<a name="157" href="#157">157</a>                 <strong class="jxr_keyword">if</strong> (processor == <strong class="jxr_keyword">null</strong>) {
<a name="158" href="#158">158</a>                     <strong class="jxr_keyword">throw</strong> <strong class="jxr_keyword">new</strong> IllegalArgumentException(
<a name="159" href="#159">159</a>                             String.valueOf(processorType) + <span class="jxr_string">" must have a public constructor "</span> +
<a name="160" href="#160">160</a>                             <span class="jxr_string">"with one "</span> + ExecutorService.<strong class="jxr_keyword">class</strong>.getSimpleName() + <span class="jxr_string">" parameter, "</span> +
<a name="161" href="#161">161</a>                             <span class="jxr_string">"a public constructor with one "</span> + Executor.<strong class="jxr_keyword">class</strong>.getSimpleName() + 
<a name="162" href="#162">162</a>                             <span class="jxr_string">" parameter or a public default constructor."</span>);
<a name="163" href="#163">163</a>                 }
<a name="164" href="#164">164</a>                 
<a name="165" href="#165">165</a>                 pool[i] = processor;
<a name="166" href="#166">166</a>             }
<a name="167" href="#167">167</a>             
<a name="168" href="#168">168</a>             success = <strong class="jxr_keyword">true</strong>;
<a name="169" href="#169">169</a>         } <strong class="jxr_keyword">finally</strong> {
<a name="170" href="#170">170</a>             <strong class="jxr_keyword">if</strong> (!success) {
<a name="171" href="#171">171</a>                 dispose();
<a name="172" href="#172">172</a>             }
<a name="173" href="#173">173</a>         }
<a name="174" href="#174">174</a>     }
<a name="175" href="#175">175</a>     
<a name="176" href="#176">176</a>     <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">void</strong> add(T session) {
<a name="177" href="#177">177</a>         getProcessor(session).add(session);
<a name="178" href="#178">178</a>     }
<a name="179" href="#179">179</a> 
<a name="180" href="#180">180</a>     <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">void</strong> flush(T session) {
<a name="181" href="#181">181</a>         getProcessor(session).flush(session);
<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">public</strong> <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">void</strong> remove(T session) {
<a name="185" href="#185">185</a>         getProcessor(session).remove(session);
<a name="186" href="#186">186</a>     }
<a name="187" href="#187">187</a> 
<a name="188" href="#188">188</a>     <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">void</strong> updateTrafficMask(T session) {
<a name="189" href="#189">189</a>         getProcessor(session).updateTrafficMask(session);
<a name="190" href="#190">190</a>     }
<a name="191" href="#191">191</a>     
<a name="192" href="#192">192</a>     <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">boolean</strong> isDisposed() {
<a name="193" href="#193">193</a>         <strong class="jxr_keyword">return</strong> disposed;
<a name="194" href="#194">194</a>     }
<a name="195" href="#195">195</a> 
<a name="196" href="#196">196</a>     <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">boolean</strong> isDisposing() {
<a name="197" href="#197">197</a>         <strong class="jxr_keyword">return</strong> disposing;
<a name="198" href="#198">198</a>     }
<a name="199" href="#199">199</a> 
<a name="200" href="#200">200</a>     <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">void</strong> dispose() {
<a name="201" href="#201">201</a>         <strong class="jxr_keyword">if</strong> (disposed) {
<a name="202" href="#202">202</a>             <strong class="jxr_keyword">return</strong>;
<a name="203" href="#203">203</a>         }
<a name="204" href="#204">204</a> 
<a name="205" href="#205">205</a>         <strong class="jxr_keyword">synchronized</strong> (disposalLock) {
<a name="206" href="#206">206</a>             <strong class="jxr_keyword">if</strong> (!disposing) {
<a name="207" href="#207">207</a>                 disposing = <strong class="jxr_keyword">true</strong>;
<a name="208" href="#208">208</a>                 <strong class="jxr_keyword">for</strong> (<strong class="jxr_keyword">int</strong> i = pool.length - 1; i &gt;= 0; i --) {
<a name="209" href="#209">209</a>                     <strong class="jxr_keyword">if</strong> (pool[i] == <strong class="jxr_keyword">null</strong> || pool[i].isDisposing()) {
<a name="210" href="#210">210</a>                         <strong class="jxr_keyword">continue</strong>;
<a name="211" href="#211">211</a>                     }
<a name="212" href="#212">212</a> 
<a name="213" href="#213">213</a>                     <strong class="jxr_keyword">try</strong> {
<a name="214" href="#214">214</a>                         pool[i].dispose();
<a name="215" href="#215">215</a>                     } <strong class="jxr_keyword">catch</strong> (Exception e) {
<a name="216" href="#216">216</a>                         logger.warn(
<a name="217" href="#217">217</a>                                 <span class="jxr_string">"Failed to dispose a "</span> +
<a name="218" href="#218">218</a>                                 pool[i].getClass().getSimpleName() +
<a name="219" href="#219">219</a>                                 <span class="jxr_string">" at index "</span> + i + <span class="jxr_string">"."</span>, e);
<a name="220" href="#220">220</a>                     } <strong class="jxr_keyword">finally</strong> {
<a name="221" href="#221">221</a>                         pool[i] = <strong class="jxr_keyword">null</strong>;
<a name="222" href="#222">222</a>                     }
<a name="223" href="#223">223</a>                 }
<a name="224" href="#224">224</a>                 
<a name="225" href="#225">225</a>                 <strong class="jxr_keyword">if</strong> (createdExecutor) {
<a name="226" href="#226">226</a>                     ((ExecutorService) executor).shutdown();
<a name="227" href="#227">227</a>                 }
<a name="228" href="#228">228</a>             }
<a name="229" href="#229">229</a>         }
<a name="230" href="#230">230</a> 
<a name="231" href="#231">231</a>         disposed = <strong class="jxr_keyword">true</strong>;
<a name="232" href="#232">232</a>     }
<a name="233" href="#233">233</a>     
<a name="234" href="#234">234</a>     @SuppressWarnings(<span class="jxr_string">"unchecked"</span>)
<a name="235" href="#235">235</a>     <strong class="jxr_keyword">private</strong> IoProcessor&lt;T&gt; getProcessor(T session) {
<a name="236" href="#236">236</a>         IoProcessor&lt;T&gt; p = (IoProcessor&lt;T&gt;) session.getAttribute(PROCESSOR);
<a name="237" href="#237">237</a>         <strong class="jxr_keyword">if</strong> (p == <strong class="jxr_keyword">null</strong>) {
<a name="238" href="#238">238</a>             p = nextProcessor();
<a name="239" href="#239">239</a>             IoProcessor&lt;T&gt; oldp =
<a name="240" href="#240">240</a>                 (IoProcessor&lt;T&gt;) session.setAttributeIfAbsent(PROCESSOR, p);
<a name="241" href="#241">241</a>             <strong class="jxr_keyword">if</strong> (oldp != <strong class="jxr_keyword">null</strong>) {
<a name="242" href="#242">242</a>                 p = oldp;
<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>         <strong class="jxr_keyword">return</strong> p;
<a name="247" href="#247">247</a>     }
<a name="248" href="#248">248</a> 
<a name="249" href="#249">249</a>     <strong class="jxr_keyword">private</strong> IoProcessor&lt;T&gt; nextProcessor() {
<a name="250" href="#250">250</a>         checkDisposal();
<a name="251" href="#251">251</a>         <strong class="jxr_keyword">return</strong> pool[Math.abs(processorDistributor.getAndIncrement()) % pool.length];
<a name="252" href="#252">252</a>     }
<a name="253" href="#253">253</a> 
<a name="254" href="#254">254</a>     <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">void</strong> checkDisposal() {
<a name="255" href="#255">255</a>         <strong class="jxr_keyword">if</strong> (disposed) {
<a name="256" href="#256">256</a>             <strong class="jxr_keyword">throw</strong> <strong class="jxr_keyword">new</strong> IllegalStateException(<span class="jxr_string">"A disposed processor cannot be accessed."</span>);
<a name="257" href="#257">257</a>         }
<a name="258" href="#258">258</a>     }
<a name="259" href="#259">259</a> }
</pre>
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