statemachine.html

MINA+API 关于MINA的API

<a name="197" href="#197">197</a>                     setCurrentState(context, newState);
<a name="198" href="#198">198</a>                     handle(newState, event);
<a name="199" href="#199">199</a>                 } <strong class="jxr_keyword">else</strong> {
<a name="200" href="#200">200</a>                     <strong class="jxr_keyword">if</strong> (log.isDebugEnabled()) {
<a name="201" href="#201">201</a>                         log.debug(<span class="jxr_string">"BreakAndGotoException thrown in "</span> 
<a name="202" href="#202">202</a>                                 + <span class="jxr_string">"transition "</span> + t + <span class="jxr_string">". Moving to state "</span>
<a name="203" href="#203">203</a>                                 + newState.getId() + <span class="jxr_string">" next."</span>);
<a name="204" href="#204">204</a>                     }
<a name="205" href="#205">205</a>                     setCurrentState(context, newState);
<a name="206" href="#206">206</a>                 }
<a name="207" href="#207">207</a>                 <strong class="jxr_keyword">return</strong>;
<a name="208" href="#208">208</a>             } <strong class="jxr_keyword">catch</strong> (BreakAndCallException bace) {
<a name="209" href="#209">209</a>                 <a href="../../../../org/apache/mina/statemachine/State.html">State</a> newState = getState(bace.getStateId());
<a name="210" href="#210">210</a> 
<a name="211" href="#211">211</a>                 Stack&lt;State&gt; callStack = getCallStack(context);
<a name="212" href="#212">212</a>                 <a href="../../../../org/apache/mina/statemachine/State.html">State</a> returnTo = bace.getReturnToStateId() != <strong class="jxr_keyword">null</strong> 
<a name="213" href="#213">213</a>                     ? getState(bace.getReturnToStateId()) 
<a name="214" href="#214">214</a>                     : context.getCurrentState();
<a name="215" href="#215">215</a>                 callStack.push(returnTo);
<a name="216" href="#216">216</a> 
<a name="217" href="#217">217</a>                 <strong class="jxr_keyword">if</strong> (bace.isNow()) {
<a name="218" href="#218">218</a>                     <strong class="jxr_keyword">if</strong> (log.isDebugEnabled()) {
<a name="219" href="#219">219</a>                         log.debug(<span class="jxr_string">"BreakAndCallException thrown in "</span> 
<a name="220" href="#220">220</a>                                 + <span class="jxr_string">"transition "</span> + t + <span class="jxr_string">". Moving to state "</span>
<a name="221" href="#221">221</a>                                 + newState.getId() + <span class="jxr_string">" now."</span>);
<a name="222" href="#222">222</a>                     }
<a name="223" href="#223">223</a>                     setCurrentState(context, newState);
<a name="224" href="#224">224</a>                     handle(newState, event);
<a name="225" href="#225">225</a>                 } <strong class="jxr_keyword">else</strong> {
<a name="226" href="#226">226</a>                     <strong class="jxr_keyword">if</strong> (log.isDebugEnabled()) {
<a name="227" href="#227">227</a>                         log.debug(<span class="jxr_string">"BreakAndCallException thrown in "</span> 
<a name="228" href="#228">228</a>                                 + <span class="jxr_string">"transition "</span> + t + <span class="jxr_string">". Moving to state "</span>
<a name="229" href="#229">229</a>                                 + newState.getId() + <span class="jxr_string">" next."</span>);
<a name="230" href="#230">230</a>                     }
<a name="231" href="#231">231</a>                     setCurrentState(context, newState);
<a name="232" href="#232">232</a>                 }
<a name="233" href="#233">233</a>                 <strong class="jxr_keyword">return</strong>;
<a name="234" href="#234">234</a>             } <strong class="jxr_keyword">catch</strong> (BreakAndReturnException bare) {
<a name="235" href="#235">235</a>                 Stack&lt;State&gt; callStack = getCallStack(context);
<a name="236" href="#236">236</a>                 <a href="../../../../org/apache/mina/statemachine/State.html">State</a> newState = callStack.pop();
<a name="237" href="#237">237</a> 
<a name="238" href="#238">238</a>                 <strong class="jxr_keyword">if</strong> (bare.isNow()) {
<a name="239" href="#239">239</a>                     <strong class="jxr_keyword">if</strong> (log.isDebugEnabled()) {
<a name="240" href="#240">240</a>                         log.debug(<span class="jxr_string">"BreakAndReturnException thrown in "</span> 
<a name="241" href="#241">241</a>                                 + <span class="jxr_string">"transition "</span> + t + <span class="jxr_string">". Moving to state "</span>
<a name="242" href="#242">242</a>                                 + newState.getId() + <span class="jxr_string">" now."</span>);
<a name="243" href="#243">243</a>                     }
<a name="244" href="#244">244</a>                     setCurrentState(context, newState);
<a name="245" href="#245">245</a>                     handle(newState, event);
<a name="246" href="#246">246</a>                 } <strong class="jxr_keyword">else</strong> {
<a name="247" href="#247">247</a>                     <strong class="jxr_keyword">if</strong> (log.isDebugEnabled()) {
<a name="248" href="#248">248</a>                         log.debug(<span class="jxr_string">"BreakAndReturnException thrown in "</span> 
<a name="249" href="#249">249</a>                                 + <span class="jxr_string">"transition "</span> + t + <span class="jxr_string">". Moving to state "</span>
<a name="250" href="#250">250</a>                                 + newState.getId() + <span class="jxr_string">" next."</span>);
<a name="251" href="#251">251</a>                     }
<a name="252" href="#252">252</a>                     setCurrentState(context, newState);
<a name="253" href="#253">253</a>                 }
<a name="254" href="#254">254</a>                 <strong class="jxr_keyword">return</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>         <em class="jxr_comment">/*</em>
<a name="259" href="#259">259</a> <em class="jxr_comment">         * No transition could handle the event. Try with the parent state if</em>
<a name="260" href="#260">260</a> <em class="jxr_comment">         * there is one.</em>
<a name="261" href="#261">261</a> <em class="jxr_comment">         */</em>
<a name="262" href="#262">262</a> 
<a name="263" href="#263">263</a>         <strong class="jxr_keyword">if</strong> (state.getParent() != <strong class="jxr_keyword">null</strong>) {
<a name="264" href="#264">264</a>             handle(state.getParent(), event);
<a name="265" href="#265">265</a>         } <strong class="jxr_keyword">else</strong> {
<a name="266" href="#266">266</a>             <strong class="jxr_keyword">throw</strong> <strong class="jxr_keyword">new</strong> <a href="../../../../org/apache/mina/statemachine/event/UnhandledEventException.html">UnhandledEventException</a>(event);
<a name="267" href="#267">267</a>         }
<a name="268" href="#268">268</a>     }
<a name="269" href="#269">269</a> 
<a name="270" href="#270">270</a>     <strong class="jxr_keyword">private</strong> Stack&lt;State&gt; getCallStack(<a href="../../../../org/apache/mina/statemachine/context/StateContext.html">StateContext</a> context) {
<a name="271" href="#271">271</a>         @SuppressWarnings(<span class="jxr_string">"unchecked"</span>)
<a name="272" href="#272">272</a>         Stack&lt;State&gt; callStack = (Stack&lt;State&gt;) context.getAttribute(CALL_STACK);
<a name="273" href="#273">273</a>         <strong class="jxr_keyword">if</strong> (callStack == <strong class="jxr_keyword">null</strong>) {
<a name="274" href="#274">274</a>             callStack = <strong class="jxr_keyword">new</strong> Stack&lt;State&gt;();
<a name="275" href="#275">275</a>             context.setAttribute(CALL_STACK, callStack);
<a name="276" href="#276">276</a>         }
<a name="277" href="#277">277</a>         <strong class="jxr_keyword">return</strong> callStack;
<a name="278" href="#278">278</a>     }
<a name="279" href="#279">279</a> 
<a name="280" href="#280">280</a>     <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">void</strong> setCurrentState(<a href="../../../../org/apache/mina/statemachine/context/StateContext.html">StateContext</a> context, <a href="../../../../org/apache/mina/statemachine/State.html">State</a> newState) {
<a name="281" href="#281">281</a>         <strong class="jxr_keyword">if</strong> (newState != <strong class="jxr_keyword">null</strong>) {
<a name="282" href="#282">282</a>             <strong class="jxr_keyword">if</strong> (log.isDebugEnabled()) {
<a name="283" href="#283">283</a>                 <strong class="jxr_keyword">if</strong> (newState != context.getCurrentState()) {
<a name="284" href="#284">284</a>                     log.debug(<span class="jxr_string">"Leaving state "</span> + context.getCurrentState().getId());
<a name="285" href="#285">285</a>                     log.debug(<span class="jxr_string">"Entering state "</span> + newState.getId());
<a name="286" href="#286">286</a>                 }
<a name="287" href="#287">287</a>             }
<a name="288" href="#288">288</a>             context.setCurrentState(newState);
<a name="289" href="#289">289</a>         }
<a name="290" href="#290">290</a>     }
<a name="291" href="#291">291</a>     
<a name="292" href="#292">292</a> }
</pre>
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