mdcinjectionfilter.html

MINA+API 关于MINA的API

<a name="125" href="#125">125</a>         Map&lt;String, String&gt; context = getAndFillContext(event.getSession());
<a name="126" href="#126">126</a> 
<a name="127" href="#127">127</a>         <strong class="jxr_keyword">if</strong> (currentCallDepth == 0) {
<a name="128" href="#128">128</a>             <em class="jxr_comment">/*<em class="jxr_comment"> copy context to the MDC when necessary. */</em></em>
<a name="129" href="#129">129</a>             <strong class="jxr_keyword">for</strong> (Map.Entry&lt;String, String&gt; e : context.entrySet()) {
<a name="130" href="#130">130</a>                 MDC.put(e.getKey(), e.getValue());
<a name="131" href="#131">131</a>             }
<a name="132" href="#132">132</a>         }
<a name="133" href="#133">133</a> 
<a name="134" href="#134">134</a>         <strong class="jxr_keyword">try</strong> {
<a name="135" href="#135">135</a>             <em class="jxr_comment">/*<em class="jxr_comment"> propagate event down the filter chain */</em></em>
<a name="136" href="#136">136</a>             event.fire();
<a name="137" href="#137">137</a>         } <strong class="jxr_keyword">finally</strong> {
<a name="138" href="#138">138</a>             <strong class="jxr_keyword">if</strong> (currentCallDepth == 0) {
<a name="139" href="#139">139</a>                 <em class="jxr_comment">/*<em class="jxr_comment"> remove context from the MDC */</em></em>
<a name="140" href="#140">140</a>                 <strong class="jxr_keyword">for</strong> (String key : context.keySet()) {
<a name="141" href="#141">141</a>                     MDC.remove(key);
<a name="142" href="#142">142</a>                 }
<a name="143" href="#143">143</a>                 callDepth.remove();
<a name="144" href="#144">144</a>             } <strong class="jxr_keyword">else</strong> {
<a name="145" href="#145">145</a>                 callDepth.set(currentCallDepth);
<a name="146" href="#146">146</a>             }
<a name="147" href="#147">147</a>         }
<a name="148" href="#148">148</a>     }
<a name="149" href="#149">149</a> 
<a name="150" href="#150">150</a>     <strong class="jxr_keyword">private</strong> Map&lt;String, String&gt; getAndFillContext(<strong class="jxr_keyword">final</strong> <a href="../../../../../org/apache/mina/common/IoSession.html">IoSession</a> session) {
<a name="151" href="#151">151</a>         Map&lt;String, String&gt; context = getContext(session);
<a name="152" href="#152">152</a>         <strong class="jxr_keyword">if</strong> (context.isEmpty()) {
<a name="153" href="#153">153</a>             fillContext(session, context);
<a name="154" href="#154">154</a>         }
<a name="155" href="#155">155</a>         <strong class="jxr_keyword">return</strong> context;
<a name="156" href="#156">156</a>     }
<a name="157" href="#157">157</a> 
<a name="158" href="#158">158</a>     @SuppressWarnings(<span class="jxr_string">"unchecked"</span>)
<a name="159" href="#159">159</a>     <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">static</strong> Map&lt;String, String&gt; getContext(<strong class="jxr_keyword">final</strong> <a href="../../../../../org/apache/mina/common/IoSession.html">IoSession</a> session) {
<a name="160" href="#160">160</a>         Map&lt;String, String&gt; context = (Map&lt;String, String&gt;) session.getAttribute(CONTEXT_KEY);
<a name="161" href="#161">161</a>         <strong class="jxr_keyword">if</strong> (context == <strong class="jxr_keyword">null</strong>) {
<a name="162" href="#162">162</a>             context = <strong class="jxr_keyword">new</strong> HashMap&lt;String, String&gt;();
<a name="163" href="#163">163</a>             session.setAttribute(CONTEXT_KEY, context);
<a name="164" href="#164">164</a>         }
<a name="165" href="#165">165</a>         <strong class="jxr_keyword">return</strong> context;
<a name="166" href="#166">166</a>     }
<a name="167" href="#167">167</a> 
<a name="168" href="#168">168</a>     <em class="jxr_javadoccomment">/**</em>
<a name="169" href="#169">169</a> <em class="jxr_javadoccomment">     * write key properties of the session to the Mapped Diagnostic Context</em>
<a name="170" href="#170">170</a> <em class="jxr_javadoccomment">     * sub-classes could override this method to map more/other attributes</em>
<a name="171" href="#171">171</a> <em class="jxr_javadoccomment">     * @param session the session to map</em>
<a name="172" href="#172">172</a> <em class="jxr_javadoccomment">     * @param context key properties will be added to this map</em>
<a name="173" href="#173">173</a> <em class="jxr_javadoccomment">     */</em>
<a name="174" href="#174">174</a>     <strong class="jxr_keyword">protected</strong> <strong class="jxr_keyword">void</strong> fillContext(<strong class="jxr_keyword">final</strong> <a href="../../../../../org/apache/mina/common/IoSession.html">IoSession</a> session, <strong class="jxr_keyword">final</strong> Map&lt;String, String&gt; context) {
<a name="175" href="#175">175</a>         <strong class="jxr_keyword">if</strong> (mdcKeys.contains(MdcKey.handlerClass)) {
<a name="176" href="#176">176</a>             context.put(MdcKey.handlerClass.name(), session.getHandler()
<a name="177" href="#177">177</a>                     .getClass().getName());
<a name="178" href="#178">178</a>         }
<a name="179" href="#179">179</a>         <strong class="jxr_keyword">if</strong> (mdcKeys.contains(MdcKey.remoteAddress)) {
<a name="180" href="#180">180</a>             context.put(MdcKey.remoteAddress.name(), session.getRemoteAddress()
<a name="181" href="#181">181</a>                     .toString());
<a name="182" href="#182">182</a>         }
<a name="183" href="#183">183</a>         <strong class="jxr_keyword">if</strong> (mdcKeys.contains(MdcKey.localAddress)) {
<a name="184" href="#184">184</a>             context.put(MdcKey.localAddress.name(), session.getLocalAddress()
<a name="185" href="#185">185</a>                     .toString());
<a name="186" href="#186">186</a>         }
<a name="187" href="#187">187</a>         <strong class="jxr_keyword">if</strong> (session.getTransportMetadata().getAddressType() == InetSocketAddress.<strong class="jxr_keyword">class</strong>) {
<a name="188" href="#188">188</a>             InetSocketAddress remoteAddress = (InetSocketAddress) session
<a name="189" href="#189">189</a>                     .getRemoteAddress();
<a name="190" href="#190">190</a>             InetSocketAddress localAddress = (InetSocketAddress) session
<a name="191" href="#191">191</a>                     .getLocalAddress();
<a name="192" href="#192">192</a>             <strong class="jxr_keyword">if</strong> (mdcKeys.contains(MdcKey.remoteIp)) {
<a name="193" href="#193">193</a>                 context.put(MdcKey.remoteIp.name(), remoteAddress.getAddress()
<a name="194" href="#194">194</a>                         .getHostAddress());
<a name="195" href="#195">195</a>             }
<a name="196" href="#196">196</a>             <strong class="jxr_keyword">if</strong> (mdcKeys.contains(MdcKey.remotePort)) {
<a name="197" href="#197">197</a>                 context.put(MdcKey.remotePort.name(), String
<a name="198" href="#198">198</a>                         .valueOf(remoteAddress.getPort()));
<a name="199" href="#199">199</a>             }
<a name="200" href="#200">200</a>             <strong class="jxr_keyword">if</strong> (mdcKeys.contains(MdcKey.localIp)) {
<a name="201" href="#201">201</a>                 context.put(MdcKey.localIp.name(), localAddress.getAddress()
<a name="202" href="#202">202</a>                         .getHostAddress());
<a name="203" href="#203">203</a>             }
<a name="204" href="#204">204</a>             <strong class="jxr_keyword">if</strong> (mdcKeys.contains(MdcKey.localPort)) {
<a name="205" href="#205">205</a>                 context.put(MdcKey.localPort.name(), String
<a name="206" href="#206">206</a>                         .valueOf(localAddress.getPort()));
<a name="207" href="#207">207</a>             }
<a name="208" href="#208">208</a>         }
<a name="209" href="#209">209</a>     }
<a name="210" href="#210">210</a> 
<a name="211" href="#211">211</a>     <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">static</strong> String getProperty(<a href="../../../../../org/apache/mina/common/IoSession.html">IoSession</a> session, String key) {
<a name="212" href="#212">212</a>         <strong class="jxr_keyword">if</strong> (key == <strong class="jxr_keyword">null</strong>) {
<a name="213" href="#213">213</a>             <strong class="jxr_keyword">throw</strong> <strong class="jxr_keyword">new</strong> NullPointerException(<span class="jxr_string">"key should not be null"</span>);
<a name="214" href="#214">214</a>         }
<a name="215" href="#215">215</a> 
<a name="216" href="#216">216</a>         Map&lt;String, String&gt; context = getContext(session);
<a name="217" href="#217">217</a>         String answer = context.get(key);
<a name="218" href="#218">218</a>         <strong class="jxr_keyword">if</strong> (answer != <strong class="jxr_keyword">null</strong>) {
<a name="219" href="#219">219</a>             <strong class="jxr_keyword">return</strong> answer;
<a name="220" href="#220">220</a>         }
<a name="221" href="#221">221</a> 
<a name="222" href="#222">222</a>         <strong class="jxr_keyword">return</strong> MDC.get(key);
<a name="223" href="#223">223</a>     }
<a name="224" href="#224">224</a> 
<a name="225" href="#225">225</a> 
<a name="226" href="#226">226</a>     <em class="jxr_javadoccomment">/**</em>
<a name="227" href="#227">227</a> <em class="jxr_javadoccomment">     * Add a property to the context for the given session</em>
<a name="228" href="#228">228</a> <em class="jxr_javadoccomment">     * This property will be added to the MDC for all subsequent events</em>
<a name="229" href="#229">229</a> <em class="jxr_javadoccomment">     * @param session The session for which you want to set a property</em>
<a name="230" href="#230">230</a> <em class="jxr_javadoccomment">     * @param key  The name of the property (should not be null)</em>
<a name="231" href="#231">231</a> <em class="jxr_javadoccomment">     * @param value The value of the property</em>
<a name="232" href="#232">232</a> <em class="jxr_javadoccomment">     */</em>
<a name="233" href="#233">233</a>     <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">void</strong> setProperty(<a href="../../../../../org/apache/mina/common/IoSession.html">IoSession</a> session, String key, String value) {
<a name="234" href="#234">234</a>         <strong class="jxr_keyword">if</strong> (key == <strong class="jxr_keyword">null</strong>) {
<a name="235" href="#235">235</a>             <strong class="jxr_keyword">throw</strong> <strong class="jxr_keyword">new</strong> NullPointerException(<span class="jxr_string">"key should not be null"</span>);
<a name="236" href="#236">236</a>         }
<a name="237" href="#237">237</a>         <strong class="jxr_keyword">if</strong> (value == <strong class="jxr_keyword">null</strong>) {
<a name="238" href="#238">238</a>             removeProperty(session, key);
<a name="239" href="#239">239</a>         }
<a name="240" href="#240">240</a>         Map&lt;String, String&gt; context = getContext(session);
<a name="241" href="#241">241</a>         context.put(key, value);
<a name="242" href="#242">242</a>         MDC.put(key, value);
<a name="243" href="#243">243</a>     }
<a name="244" href="#244">244</a> 
<a name="245" href="#245">245</a>     <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">void</strong> removeProperty(<a href="../../../../../org/apache/mina/common/IoSession.html">IoSession</a> session, String key) {
<a name="246" href="#246">246</a>         <strong class="jxr_keyword">if</strong> (key == <strong class="jxr_keyword">null</strong>) {
<a name="247" href="#247">247</a>             <strong class="jxr_keyword">throw</strong> <strong class="jxr_keyword">new</strong> NullPointerException(<span class="jxr_string">"key should not be null"</span>);
<a name="248" href="#248">248</a>         }
<a name="249" href="#249">249</a>         Map&lt;String, String&gt; context = getContext(session);
<a name="250" href="#250">250</a>         context.remove(key);
<a name="251" href="#251">251</a>         MDC.remove(key);
<a name="252" href="#252">252</a>     }
<a name="253" href="#253">253</a> }
</pre>
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