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MINA+API 关于MINA的API

<a name="88" href="#88">88</a>  
<a name="89" href="#89">89</a>      @Override
<a name="90" href="#90">90</a>      <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">int</strong> read(byte[] b, <strong class="jxr_keyword">int</strong> off, <strong class="jxr_keyword">int</strong> len) <strong class="jxr_keyword">throws</strong> IOException {
<a name="91" href="#91">91</a>          <strong class="jxr_keyword">synchronized</strong> (mutex) {
<a name="92" href="#92">92</a>              <strong class="jxr_keyword">if</strong> (!waitForData()) {
<a name="93" href="#93">93</a>                  <strong class="jxr_keyword">return</strong> -1;
<a name="94" href="#94">94</a>              }
<a name="95" href="#95">95</a>  
<a name="96" href="#96">96</a>              <strong class="jxr_keyword">int</strong> readBytes;
<a name="97" href="#97">97</a>  
<a name="98" href="#98">98</a>              <strong class="jxr_keyword">if</strong> (len &gt; buf.remaining()) {
<a name="99" href="#99">99</a>                  readBytes = buf.remaining();
<a name="100" href="#100">100</a>             } <strong class="jxr_keyword">else</strong> {
<a name="101" href="#101">101</a>                 readBytes = len;
<a name="102" href="#102">102</a>             }
<a name="103" href="#103">103</a> 
<a name="104" href="#104">104</a>             buf.get(b, off, readBytes);
<a name="105" href="#105">105</a> 
<a name="106" href="#106">106</a>             <strong class="jxr_keyword">return</strong> readBytes;
<a name="107" href="#107">107</a>         }
<a name="108" href="#108">108</a>     }
<a name="109" href="#109">109</a> 
<a name="110" href="#110">110</a>     <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">boolean</strong> waitForData() <strong class="jxr_keyword">throws</strong> IOException {
<a name="111" href="#111">111</a>         <strong class="jxr_keyword">if</strong> (released) {
<a name="112" href="#112">112</a>             <strong class="jxr_keyword">return</strong> false;
<a name="113" href="#113">113</a>         }
<a name="114" href="#114">114</a> 
<a name="115" href="#115">115</a>         <strong class="jxr_keyword">synchronized</strong> (mutex) {
<a name="116" href="#116">116</a>             <strong class="jxr_keyword">while</strong> (!released &amp;&amp; buf.remaining() == 0 &amp;&amp; exception == <strong class="jxr_keyword">null</strong>) {
<a name="117" href="#117">117</a>                 <strong class="jxr_keyword">try</strong> {
<a name="118" href="#118">118</a>                     mutex.wait();
<a name="119" href="#119">119</a>                 } <strong class="jxr_keyword">catch</strong> (InterruptedException e) {
<a name="120" href="#120">120</a>                     IOException ioe = <strong class="jxr_keyword">new</strong> IOException(
<a name="121" href="#121">121</a>                             <span class="jxr_string">"Interrupted while waiting for more data"</span>);
<a name="122" href="#122">122</a>                     ioe.initCause(e);
<a name="123" href="#123">123</a>                     <strong class="jxr_keyword">throw</strong> ioe;
<a name="124" href="#124">124</a>                 }
<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>         <strong class="jxr_keyword">if</strong> (exception != <strong class="jxr_keyword">null</strong>) {
<a name="129" href="#129">129</a>             releaseBuffer();
<a name="130" href="#130">130</a>             <strong class="jxr_keyword">throw</strong> exception;
<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">if</strong> (closed &amp;&amp; buf.remaining() == 0) {
<a name="134" href="#134">134</a>             releaseBuffer();
<a name="135" href="#135">135</a> 
<a name="136" href="#136">136</a>             <strong class="jxr_keyword">return</strong> false;
<a name="137" href="#137">137</a>         }
<a name="138" href="#138">138</a> 
<a name="139" href="#139">139</a>         <strong class="jxr_keyword">return</strong> <strong class="jxr_keyword">true</strong>;
<a name="140" href="#140">140</a>     }
<a name="141" href="#141">141</a> 
<a name="142" href="#142">142</a>     <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">void</strong> releaseBuffer() {
<a name="143" href="#143">143</a>         <strong class="jxr_keyword">if</strong> (released) {
<a name="144" href="#144">144</a>             <strong class="jxr_keyword">return</strong>;
<a name="145" href="#145">145</a>         }
<a name="146" href="#146">146</a> 
<a name="147" href="#147">147</a>         released = <strong class="jxr_keyword">true</strong>;
<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">public</strong> <strong class="jxr_keyword">void</strong> write(<a href="../../../../../org/apache/mina/common/IoBuffer.html">IoBuffer</a> src) {
<a name="151" href="#151">151</a>         <strong class="jxr_keyword">synchronized</strong> (mutex) {
<a name="152" href="#152">152</a>             <strong class="jxr_keyword">if</strong> (closed) {
<a name="153" href="#153">153</a>                 <strong class="jxr_keyword">return</strong>;
<a name="154" href="#154">154</a>             }
<a name="155" href="#155">155</a> 
<a name="156" href="#156">156</a>             <strong class="jxr_keyword">if</strong> (buf.hasRemaining()) {
<a name="157" href="#157">157</a>                 <strong class="jxr_keyword">this</strong>.buf.compact();
<a name="158" href="#158">158</a>                 <strong class="jxr_keyword">this</strong>.buf.put(src);
<a name="159" href="#159">159</a>                 <strong class="jxr_keyword">this</strong>.buf.flip();
<a name="160" href="#160">160</a>             } <strong class="jxr_keyword">else</strong> {
<a name="161" href="#161">161</a>                 <strong class="jxr_keyword">this</strong>.buf.clear();
<a name="162" href="#162">162</a>                 <strong class="jxr_keyword">this</strong>.buf.put(src);
<a name="163" href="#163">163</a>                 <strong class="jxr_keyword">this</strong>.buf.flip();
<a name="164" href="#164">164</a>                 mutex.notifyAll();
<a name="165" href="#165">165</a>             }
<a name="166" href="#166">166</a>         }
<a name="167" href="#167">167</a>     }
<a name="168" href="#168">168</a> 
<a name="169" href="#169">169</a>     <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">void</strong> throwException(IOException e) {
<a name="170" href="#170">170</a>         <strong class="jxr_keyword">synchronized</strong> (mutex) {
<a name="171" href="#171">171</a>             <strong class="jxr_keyword">if</strong> (exception == <strong class="jxr_keyword">null</strong>) {
<a name="172" href="#172">172</a>                 exception = e;
<a name="173" href="#173">173</a> 
<a name="174" href="#174">174</a>                 mutex.notifyAll();
<a name="175" href="#175">175</a>             }
<a name="176" href="#176">176</a>         }
<a name="177" href="#177">177</a>     }
<a name="178" href="#178">178</a> }
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