requestresponsefilter.html

MINA+API 关于MINA的API

<a name="251" href="#251">251</a>         }
<a name="252" href="#252">252</a> 
<a name="253" href="#253">253</a>         <em class="jxr_comment">// Generate timeout artificially.</em>
<a name="254" href="#254">254</a>         <strong class="jxr_keyword">for</strong> (Request r : unrespondedRequestsCopy) {
<a name="255" href="#255">255</a>             <strong class="jxr_keyword">if</strong> (r.getTimeoutFuture().cancel(false)) {
<a name="256" href="#256">256</a>                 r.getTimeoutTask().run();
<a name="257" href="#257">257</a>             }
<a name="258" href="#258">258</a>         }
<a name="259" href="#259">259</a> 
<a name="260" href="#260">260</a>         <em class="jxr_comment">// Clear the request store just in case we missed something, though it's unlikely.</em>
<a name="261" href="#261">261</a>         Map&lt;Object, Request&gt; requestStore = getRequestStore(session);
<a name="262" href="#262">262</a>         <strong class="jxr_keyword">synchronized</strong> (requestStore) {
<a name="263" href="#263">263</a>             requestStore.clear();
<a name="264" href="#264">264</a>         }
<a name="265" href="#265">265</a> 
<a name="266" href="#266">266</a>         <em class="jxr_comment">// Now tell the main subject.</em>
<a name="267" href="#267">267</a>         nextFilter.sessionClosed(session);
<a name="268" href="#268">268</a>     }
<a name="269" href="#269">269</a> 
<a name="270" href="#270">270</a>     @SuppressWarnings(<span class="jxr_string">"unchecked"</span>)
<a name="271" href="#271">271</a>     <strong class="jxr_keyword">private</strong> Map&lt;Object, Request&gt; getRequestStore(<a href="../../../../../org/apache/mina/common/IoSession.html">IoSession</a> session) {
<a name="272" href="#272">272</a>         <strong class="jxr_keyword">return</strong> (Map&lt;Object, Request&gt;) session.getAttribute(REQUEST_STORE);
<a name="273" href="#273">273</a>     }
<a name="274" href="#274">274</a> 
<a name="275" href="#275">275</a>     @SuppressWarnings(<span class="jxr_string">"unchecked"</span>)
<a name="276" href="#276">276</a>     <strong class="jxr_keyword">private</strong> Set&lt;Request&gt; getUnrespondedRequestStore(<a href="../../../../../org/apache/mina/common/IoSession.html">IoSession</a> session) {
<a name="277" href="#277">277</a>         <strong class="jxr_keyword">return</strong> (Set&lt;Request&gt;) session.getAttribute(UNRESPONDED_REQUEST_STORE);
<a name="278" href="#278">278</a>     }
<a name="279" href="#279">279</a> 
<a name="280" href="#280">280</a>     <em class="jxr_javadoccomment">/**</em>
<a name="281" href="#281">281</a> <em class="jxr_javadoccomment">     * Returns a {@link Map} which stores {@code messageId}-{@link Request}</em>
<a name="282" href="#282">282</a> <em class="jxr_javadoccomment">     * pairs whose {@link Response}s are not received yet.  Please override</em>
<a name="283" href="#283">283</a> <em class="jxr_javadoccomment">     * this method if you need to use other {@link Map} implementation</em>
<a name="284" href="#284">284</a> <em class="jxr_javadoccomment">     * than the default one ({@link HashMap}).</em>
<a name="285" href="#285">285</a> <em class="jxr_javadoccomment">     */</em>
<a name="286" href="#286">286</a>     <strong class="jxr_keyword">protected</strong> Map&lt;Object, Request&gt; createRequestStore(
<a name="287" href="#287">287</a>             @SuppressWarnings(<span class="jxr_string">"unused"</span>) <a href="../../../../../org/apache/mina/common/IoSession.html">IoSession</a> session) {
<a name="288" href="#288">288</a>         <strong class="jxr_keyword">return</strong> <strong class="jxr_keyword">new</strong> HashMap&lt;Object, Request&gt;();
<a name="289" href="#289">289</a>     }
<a name="290" href="#290">290</a> 
<a name="291" href="#291">291</a>     <em class="jxr_javadoccomment">/**</em>
<a name="292" href="#292">292</a> <em class="jxr_javadoccomment">     * Returns a {@link Set} which stores {@link Request} whose</em>
<a name="293" href="#293">293</a> <em class="jxr_javadoccomment">     * {@link Response}s are not received yet. Please override</em>
<a name="294" href="#294">294</a> <em class="jxr_javadoccomment">     * this method if you need to use other {@link Set} implementation</em>
<a name="295" href="#295">295</a> <em class="jxr_javadoccomment">     * than the default one ({@link LinkedHashSet}).  Please note that</em>
<a name="296" href="#296">296</a> <em class="jxr_javadoccomment">     * the {@link Iterator} of the returned {@link Set} have to iterate</em>
<a name="297" href="#297">297</a> <em class="jxr_javadoccomment">     * its elements in the insertion order to ensure that</em>
<a name="298" href="#298">298</a> <em class="jxr_javadoccomment">     * {@link RequestTimeoutException}s are thrown in the order which</em>
<a name="299" href="#299">299</a> <em class="jxr_javadoccomment">     * {@link Request}s were written.  If you don't need to guarantee</em>
<a name="300" href="#300">300</a> <em class="jxr_javadoccomment">     * the order of thrown exceptions, any {@link Set} implementation</em>
<a name="301" href="#301">301</a> <em class="jxr_javadoccomment">     * can be used.</em>
<a name="302" href="#302">302</a> <em class="jxr_javadoccomment">     */</em>
<a name="303" href="#303">303</a>     <strong class="jxr_keyword">protected</strong> Set&lt;Request&gt; createUnrespondedRequestStore(
<a name="304" href="#304">304</a>             @SuppressWarnings(<span class="jxr_string">"unused"</span>) <a href="../../../../../org/apache/mina/common/IoSession.html">IoSession</a> session) {
<a name="305" href="#305">305</a>         <strong class="jxr_keyword">return</strong> <strong class="jxr_keyword">new</strong> LinkedHashSet&lt;Request&gt;();
<a name="306" href="#306">306</a>     }
<a name="307" href="#307">307</a> 
<a name="308" href="#308">308</a>     <em class="jxr_javadoccomment">/**</em>
<a name="309" href="#309">309</a> <em class="jxr_javadoccomment">     * Releases any resources related with the {@link Map} created by</em>
<a name="310" href="#310">310</a> <em class="jxr_javadoccomment">     * {@link #createRequestStore(IoSession)}.  This method is useful</em>
<a name="311" href="#311">311</a> <em class="jxr_javadoccomment">     * if you override {@link #createRequestStore(IoSession)}.</em>
<a name="312" href="#312">312</a> <em class="jxr_javadoccomment">     *</em>
<a name="313" href="#313">313</a> <em class="jxr_javadoccomment">     * @param requestStore what you returned in {@link #createRequestStore(IoSession)}</em>
<a name="314" href="#314">314</a> <em class="jxr_javadoccomment">     */</em>
<a name="315" href="#315">315</a>     <strong class="jxr_keyword">protected</strong> <strong class="jxr_keyword">void</strong> destroyRequestStore(
<a name="316" href="#316">316</a>             @SuppressWarnings(<span class="jxr_string">"unused"</span>)
<a name="317" href="#317">317</a>             Map&lt;Object, Request&gt; requestStore) {
<a name="318" href="#318">318</a>     }
<a name="319" href="#319">319</a> 
<a name="320" href="#320">320</a>     <em class="jxr_javadoccomment">/**</em>
<a name="321" href="#321">321</a> <em class="jxr_javadoccomment">     * Releases any resources related with the {@link Set} created by</em>
<a name="322" href="#322">322</a> <em class="jxr_javadoccomment">     * {@link #createUnrespondedRequestStore(IoSession)}.  This method is</em>
<a name="323" href="#323">323</a> <em class="jxr_javadoccomment">     * useful if you override {@link #createUnrespondedRequestStore(IoSession)}.</em>
<a name="324" href="#324">324</a> <em class="jxr_javadoccomment">     *</em>
<a name="325" href="#325">325</a> <em class="jxr_javadoccomment">     * @param unrespondedRequestStore what you returned in {@link #createUnrespondedRequestStore(IoSession)}</em>
<a name="326" href="#326">326</a> <em class="jxr_javadoccomment">     */</em>
<a name="327" href="#327">327</a>     <strong class="jxr_keyword">protected</strong> <strong class="jxr_keyword">void</strong> destroyUnrespondedRequestStore(
<a name="328" href="#328">328</a>             @SuppressWarnings(<span class="jxr_string">"unused"</span>)
<a name="329" href="#329">329</a>             Set&lt;Request&gt; unrespondedRequestStore) {
<a name="330" href="#330">330</a>     }
<a name="331" href="#331">331</a> 
<a name="332" href="#332">332</a>     <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">class</strong> <a href="../../../../../org/apache/mina/filter/reqres/RequestResponseFilter.html">TimeoutTask</a> implements Runnable {
<a name="333" href="#333">333</a>         <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">final</strong> <a href="../../../../../org/apache/mina/common/IoFilter.html">NextFilter</a> filter;
<a name="334" href="#334">334</a> 
<a name="335" href="#335">335</a>         <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">final</strong> <a href="../../../../../org/apache/mina/filter/reqres/Request.html">Request</a> request;
<a name="336" href="#336">336</a> 
<a name="337" href="#337">337</a>         <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">final</strong> <a href="../../../../../org/apache/mina/common/IoSession.html">IoSession</a> session;
<a name="338" href="#338">338</a> 
<a name="339" href="#339">339</a>         <strong class="jxr_keyword">private</strong> <a href="../../../../../org/apache/mina/filter/reqres/RequestResponseFilter.html">TimeoutTask</a>(<a href="../../../../../org/apache/mina/common/IoFilter.html">NextFilter</a> filter, <a href="../../../../../org/apache/mina/filter/reqres/Request.html">Request</a> request,
<a name="340" href="#340">340</a>                 <a href="../../../../../org/apache/mina/common/IoSession.html">IoSession</a> session) {
<a name="341" href="#341">341</a>             <strong class="jxr_keyword">this</strong>.filter = filter;
<a name="342" href="#342">342</a>             <strong class="jxr_keyword">this</strong>.request = request;
<a name="343" href="#343">343</a>             <strong class="jxr_keyword">this</strong>.session = session;
<a name="344" href="#344">344</a>         }
<a name="345" href="#345">345</a> 
<a name="346" href="#346">346</a>         <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">void</strong> run() {
<a name="347" href="#347">347</a>             Set&lt;Request&gt; unrespondedRequests = getUnrespondedRequestStore(session);
<a name="348" href="#348">348</a>             <strong class="jxr_keyword">if</strong> (unrespondedRequests != <strong class="jxr_keyword">null</strong>) {
<a name="349" href="#349">349</a>                 <strong class="jxr_keyword">synchronized</strong> (unrespondedRequests) {
<a name="350" href="#350">350</a>                     unrespondedRequests.remove(request);
<a name="351" href="#351">351</a>                 }
<a name="352" href="#352">352</a>             }
<a name="353" href="#353">353</a> 
<a name="354" href="#354">354</a>             Map&lt;Object, Request&gt; requestStore = getRequestStore(session);
<a name="355" href="#355">355</a>             Object requestId = request.getId();
<a name="356" href="#356">356</a>             <strong class="jxr_keyword">boolean</strong> timedOut;
<a name="357" href="#357">357</a>             <strong class="jxr_keyword">synchronized</strong> (requestStore) {
<a name="358" href="#358">358</a>                 <strong class="jxr_keyword">if</strong> (requestStore.get(requestId) == request) {
<a name="359" href="#359">359</a>                     requestStore.remove(requestId);
<a name="360" href="#360">360</a>                     timedOut = <strong class="jxr_keyword">true</strong>;
<a name="361" href="#361">361</a>                 } <strong class="jxr_keyword">else</strong> {
<a name="362" href="#362">362</a>                     timedOut = false;
<a name="363" href="#363">363</a>                 }
<a name="364" href="#364">364</a>             }
<a name="365" href="#365">365</a> 
<a name="366" href="#366">366</a>             <strong class="jxr_keyword">if</strong> (timedOut) {
<a name="367" href="#367">367</a>                 <em class="jxr_comment">// Throw the exception only when it's really timed out.</em>
<a name="368" href="#368">368</a>                 <a href="../../../../../org/apache/mina/filter/reqres/RequestTimeoutException.html">RequestTimeoutException</a> e = <strong class="jxr_keyword">new</strong> <a href="../../../../../org/apache/mina/filter/reqres/RequestTimeoutException.html">RequestTimeoutException</a>(request);
<a name="369" href="#369">369</a>                 request.signal(e);
<a name="370" href="#370">370</a>                 filter.exceptionCaught(session, e);
<a name="371" href="#371">371</a>             }
<a name="372" href="#372">372</a>         }
<a name="373" href="#373">373</a>     }
<a name="374" href="#374">374</a> }
</pre>
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