protocolcodecfilter.html

MINA+API 关于MINA的API

<a name="221" href="#221">221</a> 
<a name="222" href="#222">222</a>     @Override
<a name="223" href="#223">223</a>     <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">void</strong> filterWrite(<a href="../../../../../org/apache/mina/common/IoFilter.html">NextFilter</a> nextFilter, <a href="../../../../../org/apache/mina/common/IoSession.html">IoSession</a> session,
<a name="224" href="#224">224</a>             <a href="../../../../../org/apache/mina/common/WriteRequest.html">WriteRequest</a> writeRequest) <strong class="jxr_keyword">throws</strong> Exception {
<a name="225" href="#225">225</a>         Object message = writeRequest.getMessage();
<a name="226" href="#226">226</a>         <strong class="jxr_keyword">if</strong> (message instanceof IoBuffer || message instanceof FileRegion) {
<a name="227" href="#227">227</a>             nextFilter.filterWrite(session, writeRequest);
<a name="228" href="#228">228</a>             <strong class="jxr_keyword">return</strong>;
<a name="229" href="#229">229</a>         }
<a name="230" href="#230">230</a> 
<a name="231" href="#231">231</a>         <a href="../../../../../org/apache/mina/filter/codec/ProtocolEncoder.html">ProtocolEncoder</a> encoder = getEncoder0(session);
<a name="232" href="#232">232</a>         <a href="../../../../../org/apache/mina/filter/codec/ProtocolCodecFilter.html">ProtocolEncoderOutputImpl</a> encoderOut = getEncoderOut(session,
<a name="233" href="#233">233</a>                 nextFilter, writeRequest);
<a name="234" href="#234">234</a> 
<a name="235" href="#235">235</a>         <strong class="jxr_keyword">try</strong> {
<a name="236" href="#236">236</a>             encoder.encode(session, message, encoderOut);
<a name="237" href="#237">237</a>             encoderOut.flushWithoutFuture();
<a name="238" href="#238">238</a>             nextFilter.filterWrite(session, <strong class="jxr_keyword">new</strong> <a href="../../../../../org/apache/mina/filter/codec/ProtocolCodecFilter.html">MessageWriteRequest</a>(
<a name="239" href="#239">239</a>                     writeRequest));
<a name="240" href="#240">240</a>         } <strong class="jxr_keyword">catch</strong> (Throwable t) {
<a name="241" href="#241">241</a>             <a href="../../../../../org/apache/mina/filter/codec/ProtocolEncoderException.html">ProtocolEncoderException</a> pee;
<a name="242" href="#242">242</a>             <strong class="jxr_keyword">if</strong> (t instanceof ProtocolEncoderException) {
<a name="243" href="#243">243</a>                 pee = (ProtocolEncoderException) t;
<a name="244" href="#244">244</a>             } <strong class="jxr_keyword">else</strong> {
<a name="245" href="#245">245</a>                 pee = <strong class="jxr_keyword">new</strong> <a href="../../../../../org/apache/mina/filter/codec/ProtocolEncoderException.html">ProtocolEncoderException</a>(t);
<a name="246" href="#246">246</a>             }
<a name="247" href="#247">247</a>             <strong class="jxr_keyword">throw</strong> pee;
<a name="248" href="#248">248</a>         }
<a name="249" href="#249">249</a>     }
<a name="250" href="#250">250</a> 
<a name="251" href="#251">251</a>     @Override
<a name="252" href="#252">252</a>     <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">void</strong> sessionClosed(<a href="../../../../../org/apache/mina/common/IoFilter.html">NextFilter</a> nextFilter, <a href="../../../../../org/apache/mina/common/IoSession.html">IoSession</a> session)
<a name="253" href="#253">253</a>             <strong class="jxr_keyword">throws</strong> Exception {
<a name="254" href="#254">254</a>         <em class="jxr_comment">// Call finishDecode() first when a connection is closed.</em>
<a name="255" href="#255">255</a>         <a href="../../../../../org/apache/mina/filter/codec/ProtocolDecoder.html">ProtocolDecoder</a> decoder = getDecoder0(session);
<a name="256" href="#256">256</a>         <a href="../../../../../org/apache/mina/filter/codec/ProtocolDecoderOutput.html">ProtocolDecoderOutput</a> decoderOut = getDecoderOut(session, nextFilter);
<a name="257" href="#257">257</a>         <strong class="jxr_keyword">try</strong> {
<a name="258" href="#258">258</a>             decoder.finishDecode(session, decoderOut);
<a name="259" href="#259">259</a>         } <strong class="jxr_keyword">catch</strong> (Throwable t) {
<a name="260" href="#260">260</a>             <a href="../../../../../org/apache/mina/filter/codec/ProtocolDecoderException.html">ProtocolDecoderException</a> pde;
<a name="261" href="#261">261</a>             <strong class="jxr_keyword">if</strong> (t instanceof ProtocolDecoderException) {
<a name="262" href="#262">262</a>                 pde = (ProtocolDecoderException) t;
<a name="263" href="#263">263</a>             } <strong class="jxr_keyword">else</strong> {
<a name="264" href="#264">264</a>                 pde = <strong class="jxr_keyword">new</strong> <a href="../../../../../org/apache/mina/filter/codec/ProtocolDecoderException.html">ProtocolDecoderException</a>(t);
<a name="265" href="#265">265</a>             }
<a name="266" href="#266">266</a>             <strong class="jxr_keyword">throw</strong> pde;
<a name="267" href="#267">267</a>         } <strong class="jxr_keyword">finally</strong> {
<a name="268" href="#268">268</a>             <em class="jxr_comment">// Dispose all.</em>
<a name="269" href="#269">269</a>             disposeEncoder(session);
<a name="270" href="#270">270</a>             disposeDecoder(session);
<a name="271" href="#271">271</a>             disposeDecoderOut(session);
<a name="272" href="#272">272</a>             decoderOut.flush();
<a name="273" href="#273">273</a>         }
<a name="274" href="#274">274</a> 
<a name="275" href="#275">275</a>         nextFilter.sessionClosed(session);
<a name="276" href="#276">276</a>     }
<a name="277" href="#277">277</a> 
<a name="278" href="#278">278</a>     <strong class="jxr_keyword">private</strong> <a href="../../../../../org/apache/mina/filter/codec/ProtocolEncoder.html">ProtocolEncoder</a> getEncoder0(<a href="../../../../../org/apache/mina/common/IoSession.html">IoSession</a> session) <strong class="jxr_keyword">throws</strong> Exception {
<a name="279" href="#279">279</a>         <a href="../../../../../org/apache/mina/filter/codec/ProtocolEncoder.html">ProtocolEncoder</a> encoder = (ProtocolEncoder) session
<a name="280" href="#280">280</a>                 .getAttribute(ENCODER);
<a name="281" href="#281">281</a>         <strong class="jxr_keyword">if</strong> (encoder == <strong class="jxr_keyword">null</strong>) {
<a name="282" href="#282">282</a>             encoder = factory.getEncoder(session);
<a name="283" href="#283">283</a>             session.setAttribute(ENCODER, encoder);
<a name="284" href="#284">284</a>         }
<a name="285" href="#285">285</a>         <strong class="jxr_keyword">return</strong> encoder;
<a name="286" href="#286">286</a>     }
<a name="287" href="#287">287</a> 
<a name="288" href="#288">288</a>     <strong class="jxr_keyword">private</strong> <a href="../../../../../org/apache/mina/filter/codec/ProtocolCodecFilter.html">ProtocolEncoderOutputImpl</a> getEncoderOut(<a href="../../../../../org/apache/mina/common/IoSession.html">IoSession</a> session,
<a name="289" href="#289">289</a>             <a href="../../../../../org/apache/mina/common/IoFilter.html">NextFilter</a> nextFilter, <a href="../../../../../org/apache/mina/common/WriteRequest.html">WriteRequest</a> writeRequest) {
<a name="290" href="#290">290</a>         <strong class="jxr_keyword">return</strong> <strong class="jxr_keyword">new</strong> <a href="../../../../../org/apache/mina/filter/codec/ProtocolCodecFilter.html">ProtocolEncoderOutputImpl</a>(session, nextFilter, writeRequest);
<a name="291" href="#291">291</a>     }
<a name="292" href="#292">292</a> 
<a name="293" href="#293">293</a>     <strong class="jxr_keyword">private</strong> <a href="../../../../../org/apache/mina/filter/codec/ProtocolDecoder.html">ProtocolDecoder</a> getDecoder0(<a href="../../../../../org/apache/mina/common/IoSession.html">IoSession</a> session) <strong class="jxr_keyword">throws</strong> Exception {
<a name="294" href="#294">294</a>         <a href="../../../../../org/apache/mina/filter/codec/ProtocolDecoder.html">ProtocolDecoder</a> decoder = (ProtocolDecoder) session
<a name="295" href="#295">295</a>                 .getAttribute(DECODER);
<a name="296" href="#296">296</a>         <strong class="jxr_keyword">if</strong> (decoder == <strong class="jxr_keyword">null</strong>) {
<a name="297" href="#297">297</a>             decoder = factory.getDecoder(session);
<a name="298" href="#298">298</a>             session.setAttribute(DECODER, decoder);
<a name="299" href="#299">299</a>         }
<a name="300" href="#300">300</a>         <strong class="jxr_keyword">return</strong> decoder;
<a name="301" href="#301">301</a>     }
<a name="302" href="#302">302</a> 
<a name="303" href="#303">303</a>     <strong class="jxr_keyword">private</strong> <a href="../../../../../org/apache/mina/filter/codec/ProtocolDecoderOutput.html">ProtocolDecoderOutput</a> getDecoderOut(<a href="../../../../../org/apache/mina/common/IoSession.html">IoSession</a> session,
<a name="304" href="#304">304</a>             <a href="../../../../../org/apache/mina/common/IoFilter.html">NextFilter</a> nextFilter) {
<a name="305" href="#305">305</a>         <a href="../../../../../org/apache/mina/filter/codec/ProtocolDecoderOutput.html">ProtocolDecoderOutput</a> out = (ProtocolDecoderOutput) session.getAttribute(DECODER_OUT);
<a name="306" href="#306">306</a>         <strong class="jxr_keyword">if</strong> (out == <strong class="jxr_keyword">null</strong>) {
<a name="307" href="#307">307</a>             out = <strong class="jxr_keyword">new</strong> <a href="../../../../../org/apache/mina/filter/codec/ProtocolCodecFilter.html">ProtocolDecoderOutputImpl</a>(session, nextFilter);
<a name="308" href="#308">308</a>             session.setAttribute(DECODER_OUT, out);
<a name="309" href="#309">309</a>         }
<a name="310" href="#310">310</a>         <strong class="jxr_keyword">return</strong> out;
<a name="311" href="#311">311</a>     }
<a name="312" href="#312">312</a> 
<a name="313" href="#313">313</a>     <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">void</strong> disposeEncoder(<a href="../../../../../org/apache/mina/common/IoSession.html">IoSession</a> session) {
<a name="314" href="#314">314</a>         <a href="../../../../../org/apache/mina/filter/codec/ProtocolEncoder.html">ProtocolEncoder</a> encoder = (ProtocolEncoder) session
<a name="315" href="#315">315</a>                 .removeAttribute(ENCODER);
<a name="316" href="#316">316</a>         <strong class="jxr_keyword">if</strong> (encoder == <strong class="jxr_keyword">null</strong>) {
<a name="317" href="#317">317</a>             <strong class="jxr_keyword">return</strong>;
<a name="318" href="#318">318</a>         }
<a name="319" href="#319">319</a> 
<a name="320" href="#320">320</a>         <strong class="jxr_keyword">try</strong> {
<a name="321" href="#321">321</a>             encoder.dispose(session);
<a name="322" href="#322">322</a>         } <strong class="jxr_keyword">catch</strong> (Throwable t) {
<a name="323" href="#323">323</a>             logger.warn(
<a name="324" href="#324">324</a>                     <span class="jxr_string">"Failed to dispose: "</span> + encoder.getClass().getName() + <span class="jxr_string">" ("</span> + encoder + ')');
<a name="325" href="#325">325</a>         }
<a name="326" href="#326">326</a>     }
<a name="327" href="#327">327</a> 
<a name="328" href="#328">328</a>     <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">void</strong> disposeDecoder(<a href="../../../../../org/apache/mina/common/IoSession.html">IoSession</a> session) {
<a name="329" href="#329">329</a>         <a href="../../../../../org/apache/mina/filter/codec/ProtocolDecoder.html">ProtocolDecoder</a> decoder = (ProtocolDecoder) session
<a name="330" href="#330">330</a>                 .removeAttribute(DECODER);
<a name="331" href="#331">331</a>         <strong class="jxr_keyword">if</strong> (decoder == <strong class="jxr_keyword">null</strong>) {
<a name="332" href="#332">332</a>             <strong class="jxr_keyword">return</strong>;
<a name="333" href="#333">333</a>         }
<a name="334" href="#334">334</a> 
<a name="335" href="#335">335</a>         <strong class="jxr_keyword">try</strong> {