protocolcodecfilter.html

MINA+API 关于MINA的API

<a name="106" href="#106">106</a>             encoderClass.getConstructor(EMPTY_PARAMS);
<a name="107" href="#107">107</a>         } <strong class="jxr_keyword">catch</strong> (NoSuchMethodException e) {
<a name="108" href="#108">108</a>             <strong class="jxr_keyword">throw</strong> <strong class="jxr_keyword">new</strong> IllegalArgumentException(
<a name="109" href="#109">109</a>                     <span class="jxr_string">"encoderClass doesn't have a public default constructor."</span>);
<a name="110" href="#110">110</a>         }
<a name="111" href="#111">111</a>         <strong class="jxr_keyword">try</strong> {
<a name="112" href="#112">112</a>             decoderClass.getConstructor(EMPTY_PARAMS);
<a name="113" href="#113">113</a>         } <strong class="jxr_keyword">catch</strong> (NoSuchMethodException e) {
<a name="114" href="#114">114</a>             <strong class="jxr_keyword">throw</strong> <strong class="jxr_keyword">new</strong> IllegalArgumentException(
<a name="115" href="#115">115</a>                     <span class="jxr_string">"decoderClass doesn't have a public default constructor."</span>);
<a name="116" href="#116">116</a>         }
<a name="117" href="#117">117</a> 
<a name="118" href="#118">118</a>         <strong class="jxr_keyword">this</strong>.factory = <strong class="jxr_keyword">new</strong> <a href="../../../../../org/apache/mina/filter/codec/ProtocolCodecFactory.html">ProtocolCodecFactory</a>() {
<a name="119" href="#119">119</a>             <strong class="jxr_keyword">public</strong> <a href="../../../../../org/apache/mina/filter/codec/ProtocolEncoder.html">ProtocolEncoder</a> getEncoder(<a href="../../../../../org/apache/mina/common/IoSession.html">IoSession</a> session) <strong class="jxr_keyword">throws</strong> Exception {
<a name="120" href="#120">120</a>                 <strong class="jxr_keyword">return</strong> encoderClass.newInstance();
<a name="121" href="#121">121</a>             }
<a name="122" href="#122">122</a> 
<a name="123" href="#123">123</a>             <strong class="jxr_keyword">public</strong> <a href="../../../../../org/apache/mina/filter/codec/ProtocolDecoder.html">ProtocolDecoder</a> getDecoder(<a href="../../../../../org/apache/mina/common/IoSession.html">IoSession</a> session) <strong class="jxr_keyword">throws</strong> Exception {
<a name="124" href="#124">124</a>                 <strong class="jxr_keyword">return</strong> decoderClass.newInstance();
<a name="125" href="#125">125</a>             }
<a name="126" href="#126">126</a>         };
<a name="127" href="#127">127</a>     }
<a name="128" href="#128">128</a> 
<a name="129" href="#129">129</a>     <strong class="jxr_keyword">public</strong> <a href="../../../../../org/apache/mina/filter/codec/ProtocolEncoder.html">ProtocolEncoder</a> getEncoder(<a href="../../../../../org/apache/mina/common/IoSession.html">IoSession</a> session) {
<a name="130" href="#130">130</a>         <strong class="jxr_keyword">return</strong> (ProtocolEncoder) session.getAttribute(ENCODER);
<a name="131" href="#131">131</a>     }
<a name="132" href="#132">132</a> 
<a name="133" href="#133">133</a>     <strong class="jxr_keyword">public</strong> <a href="../../../../../org/apache/mina/filter/codec/ProtocolDecoder.html">ProtocolDecoder</a> getDecoder(<a href="../../../../../org/apache/mina/common/IoSession.html">IoSession</a> session) {
<a name="134" href="#134">134</a>         <strong class="jxr_keyword">return</strong> (ProtocolDecoder) session.getAttribute(DECODER);
<a name="135" href="#135">135</a>     }
<a name="136" href="#136">136</a> 
<a name="137" href="#137">137</a>     @Override
<a name="138" href="#138">138</a>     <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">void</strong> onPreAdd(<a href="../../../../../org/apache/mina/common/IoFilterChain.html">IoFilterChain</a> parent, String name,
<a name="139" href="#139">139</a>             <a href="../../../../../org/apache/mina/common/IoFilter.html">NextFilter</a> nextFilter) <strong class="jxr_keyword">throws</strong> Exception {
<a name="140" href="#140">140</a>         <strong class="jxr_keyword">if</strong> (parent.contains(<strong class="jxr_keyword">this</strong>)) {
<a name="141" href="#141">141</a>             <strong class="jxr_keyword">throw</strong> <strong class="jxr_keyword">new</strong> IllegalArgumentException(
<a name="142" href="#142">142</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="143" href="#143">143</a>         }
<a name="144" href="#144">144</a>     }
<a name="145" href="#145">145</a> 
<a name="146" href="#146">146</a>     @Override
<a name="147" href="#147">147</a>     <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">void</strong> onPostRemove(<a href="../../../../../org/apache/mina/common/IoFilterChain.html">IoFilterChain</a> parent, String name,
<a name="148" href="#148">148</a>             <a href="../../../../../org/apache/mina/common/IoFilter.html">NextFilter</a> nextFilter) <strong class="jxr_keyword">throws</strong> Exception {
<a name="149" href="#149">149</a>         disposeEncoder(parent.getSession());
<a name="150" href="#150">150</a>         disposeDecoder(parent.getSession());
<a name="151" href="#151">151</a>         disposeDecoderOut(parent.getSession());
<a name="152" href="#152">152</a>     }
<a name="153" href="#153">153</a> 
<a name="154" href="#154">154</a>     @Override
<a name="155" href="#155">155</a>     <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">void</strong> messageReceived(<a href="../../../../../org/apache/mina/common/IoFilter.html">NextFilter</a> nextFilter, <a href="../../../../../org/apache/mina/common/IoSession.html">IoSession</a> session,
<a name="156" href="#156">156</a>             Object message) <strong class="jxr_keyword">throws</strong> Exception {
<a name="157" href="#157">157</a>         <strong class="jxr_keyword">if</strong> (!(message instanceof IoBuffer)) {
<a name="158" href="#158">158</a>             nextFilter.messageReceived(session, message);
<a name="159" href="#159">159</a>             <strong class="jxr_keyword">return</strong>;
<a name="160" href="#160">160</a>         }
<a name="161" href="#161">161</a> 
<a name="162" href="#162">162</a>         <a href="../../../../../org/apache/mina/common/IoBuffer.html">IoBuffer</a> in = (IoBuffer) message;
<a name="163" href="#163">163</a>         <a href="../../../../../org/apache/mina/filter/codec/ProtocolDecoder.html">ProtocolDecoder</a> decoder = getDecoder0(session);
<a name="164" href="#164">164</a>         <a href="../../../../../org/apache/mina/filter/codec/ProtocolDecoderOutput.html">ProtocolDecoderOutput</a> decoderOut = getDecoderOut(session, nextFilter);
<a name="165" href="#165">165</a> 
<a name="166" href="#166">166</a>         <strong class="jxr_keyword">while</strong> (in.hasRemaining()) {
<a name="167" href="#167">167</a>             <strong class="jxr_keyword">int</strong> oldPos = in.position();
<a name="168" href="#168">168</a>             <strong class="jxr_keyword">try</strong> {
<a name="169" href="#169">169</a>                 <strong class="jxr_keyword">synchronized</strong> (decoderOut) {
<a name="170" href="#170">170</a>                     decoder.decode(session, in, decoderOut);
<a name="171" href="#171">171</a>                 }
<a name="172" href="#172">172</a>                 <em class="jxr_comment">// Finish decoding if no exception was thrown.</em>
<a name="173" href="#173">173</a>                 decoderOut.flush();
<a name="174" href="#174">174</a>                 <strong class="jxr_keyword">break</strong>;
<a name="175" href="#175">175</a>             } <strong class="jxr_keyword">catch</strong> (Throwable t) {
<a name="176" href="#176">176</a>                 <a href="../../../../../org/apache/mina/filter/codec/ProtocolDecoderException.html">ProtocolDecoderException</a> pde;
<a name="177" href="#177">177</a>                 <strong class="jxr_keyword">if</strong> (t instanceof ProtocolDecoderException) {
<a name="178" href="#178">178</a>                     pde = (ProtocolDecoderException) t;
<a name="179" href="#179">179</a>                 } <strong class="jxr_keyword">else</strong> {
<a name="180" href="#180">180</a>                     pde = <strong class="jxr_keyword">new</strong> <a href="../../../../../org/apache/mina/filter/codec/ProtocolDecoderException.html">ProtocolDecoderException</a>(t);
<a name="181" href="#181">181</a>                 }
<a name="182" href="#182">182</a>                 
<a name="183" href="#183">183</a>                 <strong class="jxr_keyword">if</strong> (pde.getHexdump() == <strong class="jxr_keyword">null</strong>) {
<a name="184" href="#184">184</a>                     <strong class="jxr_keyword">int</strong> curPos = in.position();
<a name="185" href="#185">185</a>                     in.position(oldPos);
<a name="186" href="#186">186</a>                     pde.setHexdump(in.getHexDump());
<a name="187" href="#187">187</a>                     in.position(curPos);
<a name="188" href="#188">188</a>                 }
<a name="189" href="#189">189</a> 
<a name="190" href="#190">190</a>                 <em class="jxr_comment">// Fire the exceptionCaught event.</em>
<a name="191" href="#191">191</a>                 decoderOut.flush();
<a name="192" href="#192">192</a>                 nextFilter.exceptionCaught(session, pde);
<a name="193" href="#193">193</a> 
<a name="194" href="#194">194</a>                 <em class="jxr_comment">// Retry only if the type of the caught exception is</em>
<a name="195" href="#195">195</a>                 <em class="jxr_comment">// recoverable and the buffer position has changed.</em>
<a name="196" href="#196">196</a>                 <em class="jxr_comment">// We check buffer position additionally to prevent an</em>
<a name="197" href="#197">197</a>                 <em class="jxr_comment">// infinite loop.</em>
<a name="198" href="#198">198</a>                 <strong class="jxr_keyword">if</strong> (!(t instanceof RecoverableProtocolDecoderException) ||
<a name="199" href="#199">199</a>                         in.position() == oldPos) {
<a name="200" href="#200">200</a>                     <strong class="jxr_keyword">break</strong>;
<a name="201" href="#201">201</a>                 }
<a name="202" href="#202">202</a>             }
<a name="203" href="#203">203</a>         }
<a name="204" href="#204">204</a>     }
<a name="205" href="#205">205</a> 
<a name="206" href="#206">206</a>     @Override
<a name="207" href="#207">207</a>     <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">void</strong> messageSent(<a href="../../../../../org/apache/mina/common/IoFilter.html">NextFilter</a> nextFilter, <a href="../../../../../org/apache/mina/common/IoSession.html">IoSession</a> session,
<a name="208" href="#208">208</a>             <a href="../../../../../org/apache/mina/common/WriteRequest.html">WriteRequest</a> writeRequest) <strong class="jxr_keyword">throws</strong> Exception {
<a name="209" href="#209">209</a>         <strong class="jxr_keyword">if</strong> (writeRequest instanceof EncodedWriteRequest) {
<a name="210" href="#210">210</a>             <strong class="jxr_keyword">return</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">if</strong> (!(writeRequest instanceof MessageWriteRequest)) {
<a name="214" href="#214">214</a>             nextFilter.messageSent(session, writeRequest);
<a name="215" href="#215">215</a>             <strong class="jxr_keyword">return</strong>;
<a name="216" href="#216">216</a>         }
<a name="217" href="#217">217</a> 
<a name="218" href="#218">218</a>         <a href="../../../../../org/apache/mina/filter/codec/ProtocolCodecFilter.html">MessageWriteRequest</a> wrappedRequest = (MessageWriteRequest) writeRequest;
<a name="219" href="#219">219</a>         nextFilter.messageSent(session, wrappedRequest.getParentRequest());
<a name="220" href="#220">220</a>     }