readthrottlefilter.html

MINA+API 关于MINA的API

<a name="237" href="#237">237</a>         <strong class="jxr_keyword">this</strong>.maxSessionBufferSize = maxSessionBufferSize;
<a name="238" href="#238">238</a>     }
<a name="239" href="#239">239</a> 
<a name="240" href="#240">240</a>     <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">void</strong> setMaxServiceBufferSize(<strong class="jxr_keyword">int</strong> maxServiceBufferSize) {
<a name="241" href="#241">241</a>         <strong class="jxr_keyword">if</strong> (maxServiceBufferSize &lt; 0) {
<a name="242" href="#242">242</a>             maxServiceBufferSize = 0;
<a name="243" href="#243">243</a>         }
<a name="244" href="#244">244</a>         <strong class="jxr_keyword">this</strong>.maxServiceBufferSize = maxServiceBufferSize;
<a name="245" href="#245">245</a>     }
<a name="246" href="#246">246</a> 
<a name="247" href="#247">247</a>     <em class="jxr_javadoccomment">/**</em>
<a name="248" href="#248">248</a> <em class="jxr_javadoccomment">     * Sets the maximum amount of data in the buffer of the {@link ExecutorFilter}</em>
<a name="249" href="#249">249</a> <em class="jxr_javadoccomment">     * for all {@link IoSession} whose {@link IoFilterChain} has been configured by</em>
<a name="250" href="#250">250</a> <em class="jxr_javadoccomment">     * this builder. Specify {@code 0} or a smaller value to disable.</em>
<a name="251" href="#251">251</a> <em class="jxr_javadoccomment">     */</em>
<a name="252" href="#252">252</a>     <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">void</strong> setMaxGlobalBufferSize(<strong class="jxr_keyword">int</strong> maxGlobalBufferSize) {
<a name="253" href="#253">253</a>         <strong class="jxr_keyword">if</strong> (maxGlobalBufferSize &lt; 0) {
<a name="254" href="#254">254</a>             maxGlobalBufferSize = 0;
<a name="255" href="#255">255</a>         }
<a name="256" href="#256">256</a>         <strong class="jxr_keyword">this</strong>.maxGlobalBufferSize = maxGlobalBufferSize;
<a name="257" href="#257">257</a>     }
<a name="258" href="#258">258</a>     
<a name="259" href="#259">259</a>     <em class="jxr_javadoccomment">/**</em>
<a name="260" href="#260">260</a> <em class="jxr_javadoccomment">     * Returns the size estimator currently in use.</em>
<a name="261" href="#261">261</a> <em class="jxr_javadoccomment">     */</em>
<a name="262" href="#262">262</a>     <strong class="jxr_keyword">public</strong> <a href="../../../../../org/apache/mina/filter/traffic/MessageSizeEstimator.html">MessageSizeEstimator</a> getMessageSizeEstimator() {
<a name="263" href="#263">263</a>         <strong class="jxr_keyword">return</strong> messageSizeEstimator;
<a name="264" href="#264">264</a>     }
<a name="265" href="#265">265</a>     
<a name="266" href="#266">266</a>     <em class="jxr_javadoccomment">/**</em>
<a name="267" href="#267">267</a> <em class="jxr_javadoccomment">     * Returns the current amount of data in the buffer of the {@link ExecutorFilter}</em>
<a name="268" href="#268">268</a> <em class="jxr_javadoccomment">     * for the specified {@link IoSession}.</em>
<a name="269" href="#269">269</a> <em class="jxr_javadoccomment">     */</em>
<a name="270" href="#270">270</a>     <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">int</strong> getSessionBufferSize(<a href="../../../../../org/apache/mina/common/IoSession.html">IoSession</a> session) {
<a name="271" href="#271">271</a>         <a href="../../../../../org/apache/mina/filter/traffic/ReadThrottleFilter.html">State</a> state = (State) session.getAttribute(STATE);
<a name="272" href="#272">272</a>         <strong class="jxr_keyword">if</strong> (state == <strong class="jxr_keyword">null</strong>) {
<a name="273" href="#273">273</a>             <strong class="jxr_keyword">return</strong> 0;
<a name="274" href="#274">274</a>         }
<a name="275" href="#275">275</a>         
<a name="276" href="#276">276</a>         <strong class="jxr_keyword">synchronized</strong> (state) {
<a name="277" href="#277">277</a>             <strong class="jxr_keyword">return</strong> state.sessionBufferSize;
<a name="278" href="#278">278</a>         }
<a name="279" href="#279">279</a>     }
<a name="280" href="#280">280</a>     
<a name="281" href="#281">281</a>     @Override
<a name="282" href="#282">282</a>     <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">void</strong> onPreAdd(
<a name="283" href="#283">283</a>             <a href="../../../../../org/apache/mina/common/IoFilterChain.html">IoFilterChain</a> parent, String name, <a href="../../../../../org/apache/mina/common/IoFilter.html">NextFilter</a> nextFilter) <strong class="jxr_keyword">throws</strong> Exception {
<a name="284" href="#284">284</a>         <strong class="jxr_keyword">if</strong> (!parent.contains(ExecutorFilter.<strong class="jxr_keyword">class</strong>)) {
<a name="285" href="#285">285</a>             <strong class="jxr_keyword">throw</strong> <strong class="jxr_keyword">new</strong> IllegalStateException(
<a name="286" href="#286">286</a>                     <span class="jxr_string">"At least one "</span> + ExecutorFilter.<strong class="jxr_keyword">class</strong>.getName() + <span class="jxr_string">" must exist in the chain."</span>);
<a name="287" href="#287">287</a>         }
<a name="288" href="#288">288</a>         <strong class="jxr_keyword">if</strong> (parent.contains(<strong class="jxr_keyword">this</strong>)) {
<a name="289" href="#289">289</a>             <strong class="jxr_keyword">throw</strong> <strong class="jxr_keyword">new</strong> IllegalArgumentException(
<a name="290" href="#290">290</a>                     <span class="jxr_string">"You can't add the same filter instance more than once.  Create another instance and add it."</span>);
<a name="291" href="#291">291</a>         }
<a name="292" href="#292">292</a>     }
<a name="293" href="#293">293</a>     
<a name="294" href="#294">294</a>     @Override
<a name="295" href="#295">295</a>     <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">void</strong> onPostAdd(
<a name="296" href="#296">296</a>             <a href="../../../../../org/apache/mina/common/IoFilterChain.html">IoFilterChain</a> parent, String name, <a href="../../../../../org/apache/mina/common/IoFilter.html">NextFilter</a> nextFilter) <strong class="jxr_keyword">throws</strong> Exception {
<a name="297" href="#297">297</a>         
<a name="298" href="#298">298</a>         <em class="jxr_comment">// My previous filter must be an ExecutorFilter.</em>
<a name="299" href="#299">299</a>         <a href="../../../../../org/apache/mina/common/IoFilter.html">IoFilter</a> lastFilter = <strong class="jxr_keyword">null</strong>;
<a name="300" href="#300">300</a>         <strong class="jxr_keyword">for</strong> (IoFilterChain.Entry e: parent.getAll()) {
<a name="301" href="#301">301</a>             <a href="../../../../../org/apache/mina/common/IoFilter.html">IoFilter</a> currentFilter = e.getFilter();
<a name="302" href="#302">302</a>             <strong class="jxr_keyword">if</strong> (currentFilter == <strong class="jxr_keyword">this</strong>) {
<a name="303" href="#303">303</a>                 <strong class="jxr_keyword">if</strong> (lastFilter instanceof ExecutorFilter) {
<a name="304" href="#304">304</a>                     <em class="jxr_comment">// Good!</em>
<a name="305" href="#305">305</a>                     <strong class="jxr_keyword">break</strong>;
<a name="306" href="#306">306</a>                 } <strong class="jxr_keyword">else</strong> {
<a name="307" href="#307">307</a>                     <strong class="jxr_keyword">throw</strong> <strong class="jxr_keyword">new</strong> IllegalStateException(
<a name="308" href="#308">308</a>                             ReadThrottleFilter.<strong class="jxr_keyword">class</strong>.getName() + <span class="jxr_string">" must be placed after "</span> +
<a name="309" href="#309">309</a>                             <span class="jxr_string">"an "</span> + ExecutorFilter.<strong class="jxr_keyword">class</strong>.getName() + <span class="jxr_string">" in the chain"</span>);
<a name="310" href="#310">310</a>                 }
<a name="311" href="#311">311</a>             }
<a name="312" href="#312">312</a>             
<a name="313" href="#313">313</a>             lastFilter = currentFilter;
<a name="314" href="#314">314</a>         }
<a name="315" href="#315">315</a>         
<a name="316" href="#316">316</a>         <em class="jxr_comment">// Add an entering filter before the ExecutorFilter.</em>
<a name="317" href="#317">317</a>         parent.getEntry(lastFilter).addBefore(name + <span class="jxr_string">".preprocessor"</span>, enterFilter);
<a name="318" href="#318">318</a>         
<a name="319" href="#319">319</a>         <strong class="jxr_keyword">int</strong> previousSessionCount = sessionCount.getAndIncrement();
<a name="320" href="#320">320</a>         <strong class="jxr_keyword">if</strong> (previousSessionCount == 0) {
<a name="321" href="#321">321</a>             <strong class="jxr_keyword">synchronized</strong> (resumeOthersTask) {
<a name="322" href="#322">322</a>                 resumeOthersFuture = executor.scheduleWithFixedDelay(
<a name="323" href="#323">323</a>                         resumeOthersTask, 3000, 3000, TimeUnit.MILLISECONDS);
<a name="324" href="#324">324</a>             }
<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>     @Override
<a name="329" href="#329">329</a>     <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">void</strong> onPostRemove(
<a name="330" href="#330">330</a>             <a href="../../../../../org/apache/mina/common/IoFilterChain.html">IoFilterChain</a> parent, String name, <a href="../../../../../org/apache/mina/common/IoFilter.html">NextFilter</a> nextFilter) <strong class="jxr_keyword">throws</strong> Exception {
<a name="331" href="#331">331</a>         <em class="jxr_comment">// Remove the enter filter together.</em>
<a name="332" href="#332">332</a>         <strong class="jxr_keyword">try</strong> {
<a name="333" href="#333">333</a>             parent.remove(enterFilter);
<a name="334" href="#334">334</a>         } <strong class="jxr_keyword">catch</strong> (Exception e) {
<a name="335" href="#335">335</a>             <em class="jxr_comment">// Ignore.</em>
<a name="336" href="#336">336</a>         }
<a name="337" href="#337">337</a>         
<a name="338" href="#338">338</a>         <strong class="jxr_keyword">int</strong> currentSessionCount = sessionCount.decrementAndGet();
<a name="339" href="#339">339</a>         <strong class="jxr_keyword">if</strong> (currentSessionCount == 0) {
<a name="340" href="#340">340</a>             <strong class="jxr_keyword">synchronized</strong> (resumeOthersTask) {
<a name="341" href="#341">341</a>                 resumeOthersFuture.cancel(false);
<a name="342" href="#342">342</a>                 resumeOthersFuture = <strong class="jxr_keyword">null</strong>;
<a name="343" href="#343">343</a>             }
<a name="344" href="#344">344</a>         }
<a name="345" href="#345">345</a>     }
<a name="346" href="#346">346</a> 
<a name="347" href="#347">347</a>     @Override
<a name="348" href="#348">348</a>     <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">void</strong> messageReceived(
<a name="349" href="#349">349</a>             <a href="../../../../../org/apache/mina/common/IoFilter.html">NextFilter</a> nextFilter, <a href="../../../../../org/apache/mina/common/IoSession.html">IoSession</a> session, Object message) <strong class="jxr_keyword">throws</strong> Exception {
<a name="350" href="#350">350</a>         exit(session, estimateSize(message));
<a name="351" href="#351">351</a>         nextFilter.messageReceived(session, message);
<a name="352" href="#352">352</a>     }
<a name="353" href="#353">353</a> 
<a name="354" href="#354">354</a>     @Override
<a name="355" href="#355">355</a>     <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">void</strong> filterSetTrafficMask(<a href="../../../../../org/apache/mina/common/IoFilter.html">NextFilter</a> nextFilter, <a href="../../../../../org/apache/mina/common/IoSession.html">IoSession</a> session,
<a name="356" href="#356">356</a>             <a href="../../../../../org/apache/mina/common/TrafficMask.html">TrafficMask</a> trafficMask) <strong class="jxr_keyword">throws</strong> Exception {
<a name="357" href="#357">357</a>         
<a name="358" href="#358">358</a>         <strong class="jxr_keyword">if</strong> (trafficMask.isReadable()) {
<a name="359" href="#359">359</a>             <a href="../../../../../org/apache/mina/filter/traffic/ReadThrottleFilter.html">State</a> state = getState(session);