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MINA+API 关于MINA的API

<a name="102" href="#102">102</a>         SelectionKey key = session.getSelectionKey();
<a name="103" href="#103">103</a>         <strong class="jxr_keyword">if</strong> (key == <strong class="jxr_keyword">null</strong>) {
<a name="104" href="#104">104</a>             <strong class="jxr_keyword">return</strong> SessionState.PREPARING;
<a name="105" href="#105">105</a>         }
<a name="106" href="#106">106</a> 
<a name="107" href="#107">107</a>         <strong class="jxr_keyword">return</strong> key.isValid()? SessionState.OPEN : SessionState.CLOSED;
<a name="108" href="#108">108</a>     }
<a name="109" href="#109">109</a> 
<a name="110" href="#110">110</a>     @Override
<a name="111" href="#111">111</a>     <strong class="jxr_keyword">protected</strong> <strong class="jxr_keyword">boolean</strong> isReadable(<a href="../../../../../../org/apache/mina/transport/socket/nio/NioSession.html">NioSession</a> session) {
<a name="112" href="#112">112</a>         SelectionKey key = session.getSelectionKey();
<a name="113" href="#113">113</a>         <strong class="jxr_keyword">return</strong> key.isValid() &amp;&amp; key.isReadable();
<a name="114" href="#114">114</a>     }
<a name="115" href="#115">115</a> 
<a name="116" href="#116">116</a>     @Override
<a name="117" href="#117">117</a>     <strong class="jxr_keyword">protected</strong> <strong class="jxr_keyword">boolean</strong> isWritable(<a href="../../../../../../org/apache/mina/transport/socket/nio/NioSession.html">NioSession</a> session) {
<a name="118" href="#118">118</a>         SelectionKey key = session.getSelectionKey();
<a name="119" href="#119">119</a>         <strong class="jxr_keyword">return</strong> key.isValid() &amp;&amp; key.isWritable();
<a name="120" href="#120">120</a>     }
<a name="121" href="#121">121</a> 
<a name="122" href="#122">122</a>     @Override
<a name="123" href="#123">123</a>     <strong class="jxr_keyword">protected</strong> <strong class="jxr_keyword">boolean</strong> isInterestedInRead(<a href="../../../../../../org/apache/mina/transport/socket/nio/NioSession.html">NioSession</a> session) {
<a name="124" href="#124">124</a>         SelectionKey key = session.getSelectionKey();
<a name="125" href="#125">125</a>         <strong class="jxr_keyword">return</strong> key.isValid() &amp;&amp; (key.interestOps() &amp; SelectionKey.OP_READ) != 0;
<a name="126" href="#126">126</a>     }
<a name="127" href="#127">127</a> 
<a name="128" href="#128">128</a>     @Override
<a name="129" href="#129">129</a>     <strong class="jxr_keyword">protected</strong> <strong class="jxr_keyword">boolean</strong> isInterestedInWrite(<a href="../../../../../../org/apache/mina/transport/socket/nio/NioSession.html">NioSession</a> session) {
<a name="130" href="#130">130</a>         SelectionKey key = session.getSelectionKey();
<a name="131" href="#131">131</a>         <strong class="jxr_keyword">return</strong> key.isValid() &amp;&amp; (key.interestOps() &amp; SelectionKey.OP_WRITE) != 0;
<a name="132" href="#132">132</a>     }
<a name="133" href="#133">133</a> 
<a name="134" href="#134">134</a>     @Override
<a name="135" href="#135">135</a>     <strong class="jxr_keyword">protected</strong> <strong class="jxr_keyword">void</strong> setInterestedInRead(<a href="../../../../../../org/apache/mina/transport/socket/nio/NioSession.html">NioSession</a> session, <strong class="jxr_keyword">boolean</strong> value) <strong class="jxr_keyword">throws</strong> Exception {
<a name="136" href="#136">136</a>         SelectionKey key = session.getSelectionKey();
<a name="137" href="#137">137</a>         <strong class="jxr_keyword">if</strong> (value) {
<a name="138" href="#138">138</a>             key.interestOps(key.interestOps() | SelectionKey.OP_READ);
<a name="139" href="#139">139</a>         } <strong class="jxr_keyword">else</strong> {
<a name="140" href="#140">140</a>             key.interestOps(key.interestOps() &amp; ~SelectionKey.OP_READ);
<a name="141" href="#141">141</a>         }
<a name="142" href="#142">142</a>     }
<a name="143" href="#143">143</a> 
<a name="144" href="#144">144</a>     @Override
<a name="145" href="#145">145</a>     <strong class="jxr_keyword">protected</strong> <strong class="jxr_keyword">void</strong> setInterestedInWrite(<a href="../../../../../../org/apache/mina/transport/socket/nio/NioSession.html">NioSession</a> session, <strong class="jxr_keyword">boolean</strong> value) <strong class="jxr_keyword">throws</strong> Exception {
<a name="146" href="#146">146</a>         SelectionKey key = session.getSelectionKey();
<a name="147" href="#147">147</a>         <strong class="jxr_keyword">if</strong> (value) {
<a name="148" href="#148">148</a>             key.interestOps(key.interestOps() | SelectionKey.OP_WRITE);
<a name="149" href="#149">149</a>         } <strong class="jxr_keyword">else</strong> {
<a name="150" href="#150">150</a>             key.interestOps(key.interestOps() &amp; ~SelectionKey.OP_WRITE);
<a name="151" href="#151">151</a>         }
<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">protected</strong> <strong class="jxr_keyword">int</strong> read(<a href="../../../../../../org/apache/mina/transport/socket/nio/NioSession.html">NioSession</a> session, <a href="../../../../../../org/apache/mina/common/IoBuffer.html">IoBuffer</a> buf) <strong class="jxr_keyword">throws</strong> Exception {
<a name="156" href="#156">156</a>         <strong class="jxr_keyword">return</strong> session.getChannel().read(buf.buf());
<a name="157" href="#157">157</a>     }
<a name="158" href="#158">158</a> 
<a name="159" href="#159">159</a>     @Override
<a name="160" href="#160">160</a>     <strong class="jxr_keyword">protected</strong> <strong class="jxr_keyword">int</strong> write(<a href="../../../../../../org/apache/mina/transport/socket/nio/NioSession.html">NioSession</a> session, <a href="../../../../../../org/apache/mina/common/IoBuffer.html">IoBuffer</a> buf, <strong class="jxr_keyword">int</strong> length) <strong class="jxr_keyword">throws</strong> Exception {
<a name="161" href="#161">161</a>         <strong class="jxr_keyword">if</strong> (buf.remaining() &lt;= length) {
<a name="162" href="#162">162</a>             <strong class="jxr_keyword">return</strong> session.getChannel().write(buf.buf());
<a name="163" href="#163">163</a>         } <strong class="jxr_keyword">else</strong> {
<a name="164" href="#164">164</a>             <strong class="jxr_keyword">int</strong> oldLimit = buf.limit();
<a name="165" href="#165">165</a>             buf.limit(buf.position() + length);
<a name="166" href="#166">166</a>             <strong class="jxr_keyword">try</strong> {
<a name="167" href="#167">167</a>                 <strong class="jxr_keyword">return</strong> session.getChannel().write(buf.buf());
<a name="168" href="#168">168</a>             } <strong class="jxr_keyword">finally</strong> {
<a name="169" href="#169">169</a>                 buf.limit(oldLimit);
<a name="170" href="#170">170</a>             }
<a name="171" href="#171">171</a>         }
<a name="172" href="#172">172</a>     }
<a name="173" href="#173">173</a> 
<a name="174" href="#174">174</a>     @Override
<a name="175" href="#175">175</a>     <strong class="jxr_keyword">protected</strong> <strong class="jxr_keyword">int</strong> transferFile(<a href="../../../../../../org/apache/mina/transport/socket/nio/NioSession.html">NioSession</a> session, <a href="../../../../../../org/apache/mina/common/FileRegion.html">FileRegion</a> region, <strong class="jxr_keyword">int</strong> length) <strong class="jxr_keyword">throws</strong> Exception {
<a name="176" href="#176">176</a>         <strong class="jxr_keyword">try</strong> {
<a name="177" href="#177">177</a>             <strong class="jxr_keyword">return</strong> (<strong class="jxr_keyword">int</strong>) region.getFileChannel().transferTo(region.getPosition(), length, session.getChannel());
<a name="178" href="#178">178</a>         } <strong class="jxr_keyword">catch</strong> (IOException e) {
<a name="179" href="#179">179</a>             <em class="jxr_comment">// Check to see if the IOException is being thrown due to http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=5103988</em>
<a name="180" href="#180">180</a>             <strong class="jxr_keyword">if</strong> (e.getMessage().contains(<span class="jxr_string">"Resource temporarily unavailable"</span>)) {
<a name="181" href="#181">181</a>                 <strong class="jxr_keyword">return</strong> 0;
<a name="182" href="#182">182</a>             } <strong class="jxr_keyword">else</strong> {
<a name="183" href="#183">183</a>                 <strong class="jxr_keyword">throw</strong> e;
<a name="184" href="#184">184</a>             }
<a name="185" href="#185">185</a>         }
<a name="186" href="#186">186</a>     }
<a name="187" href="#187">187</a> 
<a name="188" href="#188">188</a>     <strong class="jxr_keyword">protected</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">class</strong> <a href="../../../../../../org/apache/mina/transport/socket/nio/NioProcessor.html">IoSessionIterator</a> implements Iterator&lt;NioSession&gt; {
<a name="189" href="#189">189</a>         <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">final</strong> Iterator&lt;SelectionKey&gt; i;
<a name="190" href="#190">190</a>         <strong class="jxr_keyword">private</strong> <a href="../../../../../../org/apache/mina/transport/socket/nio/NioProcessor.html">IoSessionIterator</a>(Set&lt;SelectionKey&gt; keys) {
<a name="191" href="#191">191</a>             i = keys.iterator(); 
<a name="192" href="#192">192</a>         }
<a name="193" href="#193">193</a>         <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">boolean</strong> hasNext() {
<a name="194" href="#194">194</a>             <strong class="jxr_keyword">return</strong> i.hasNext();
<a name="195" href="#195">195</a>         }
<a name="196" href="#196">196</a> 
<a name="197" href="#197">197</a>         <strong class="jxr_keyword">public</strong> <a href="../../../../../../org/apache/mina/transport/socket/nio/NioSession.html">NioSession</a> next() {
<a name="198" href="#198">198</a>             SelectionKey key = i.next();
<a name="199" href="#199">199</a>             <strong class="jxr_keyword">return</strong> (NioSession) key.attachment();
<a name="200" href="#200">200</a>         }
<a name="201" href="#201">201</a> 
<a name="202" href="#202">202</a>         <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">void</strong> remove() {
<a name="203" href="#203">203</a>             i.remove();
<a name="204" href="#204">204</a>         }
<a name="205" href="#205">205</a>     }
<a name="206" href="#206">206</a> }
</pre>
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