defaultiosessiondatastructurefactory.html

MINA+API 关于MINA的API

<a name="92" href="#92">92</a>              Object oldValue;
<a name="93" href="#93">93</a>              <strong class="jxr_keyword">synchronized</strong> (attributes) {
<a name="94" href="#94">94</a>                  oldValue = attributes.get(key);
<a name="95" href="#95">95</a>                  <strong class="jxr_keyword">if</strong> (oldValue == <strong class="jxr_keyword">null</strong>) {
<a name="96" href="#96">96</a>                      attributes.put(key, value);
<a name="97" href="#97">97</a>                  }
<a name="98" href="#98">98</a>              }
<a name="99" href="#99">99</a>              <strong class="jxr_keyword">return</strong> oldValue;
<a name="100" href="#100">100</a>         }
<a name="101" href="#101">101</a> 
<a name="102" href="#102">102</a>         <strong class="jxr_keyword">public</strong> Object removeAttribute(<a href="../../../../org/apache/mina/common/IoSession.html">IoSession</a> session, Object key) {
<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">throw</strong> <strong class="jxr_keyword">new</strong> NullPointerException(<span class="jxr_string">"key"</span>);
<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> attributes.remove(key);
<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">public</strong> <strong class="jxr_keyword">boolean</strong> removeAttribute(<a href="../../../../org/apache/mina/common/IoSession.html">IoSession</a> session, Object key, Object value) {
<a name="111" href="#111">111</a>             <strong class="jxr_keyword">if</strong> (key == <strong class="jxr_keyword">null</strong>) {
<a name="112" href="#112">112</a>                 <strong class="jxr_keyword">throw</strong> <strong class="jxr_keyword">new</strong> NullPointerException(<span class="jxr_string">"key"</span>);
<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">if</strong> (value == <strong class="jxr_keyword">null</strong>) {
<a name="116" href="#116">116</a>                 <strong class="jxr_keyword">return</strong> false;
<a name="117" href="#117">117</a>             }
<a name="118" href="#118">118</a> 
<a name="119" href="#119">119</a>             <strong class="jxr_keyword">synchronized</strong> (attributes) {
<a name="120" href="#120">120</a>                 <strong class="jxr_keyword">if</strong> (value.equals(attributes.get(key))) {
<a name="121" href="#121">121</a>                     attributes.remove(key);
<a name="122" href="#122">122</a>                     <strong class="jxr_keyword">return</strong> <strong class="jxr_keyword">true</strong>;
<a name="123" href="#123">123</a>                 }
<a name="124" href="#124">124</a>             }
<a name="125" href="#125">125</a> 
<a name="126" href="#126">126</a>             <strong class="jxr_keyword">return</strong> false;
<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> <strong class="jxr_keyword">boolean</strong> replaceAttribute(<a href="../../../../org/apache/mina/common/IoSession.html">IoSession</a> session, Object key, Object oldValue, Object newValue) {
<a name="130" href="#130">130</a>             <strong class="jxr_keyword">synchronized</strong> (attributes) {
<a name="131" href="#131">131</a>                 Object actualOldValue = attributes.get(key);
<a name="132" href="#132">132</a>                 <strong class="jxr_keyword">if</strong> (actualOldValue == <strong class="jxr_keyword">null</strong>) {
<a name="133" href="#133">133</a>                     <strong class="jxr_keyword">return</strong> false;
<a name="134" href="#134">134</a>                 }
<a name="135" href="#135">135</a> 
<a name="136" href="#136">136</a>                 <strong class="jxr_keyword">if</strong> (actualOldValue.equals(oldValue)) {
<a name="137" href="#137">137</a>                     attributes.put(key, newValue);
<a name="138" href="#138">138</a>                     <strong class="jxr_keyword">return</strong> <strong class="jxr_keyword">true</strong>;
<a name="139" href="#139">139</a>                 } <strong class="jxr_keyword">else</strong> {
<a name="140" href="#140">140</a>                     <strong class="jxr_keyword">return</strong> false;
<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> 
<a name="145" href="#145">145</a>         <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">boolean</strong> containsAttribute(<a href="../../../../org/apache/mina/common/IoSession.html">IoSession</a> session, Object key) {
<a name="146" href="#146">146</a>             <strong class="jxr_keyword">return</strong> attributes.containsKey(key);
<a name="147" href="#147">147</a>         }
<a name="148" href="#148">148</a> 
<a name="149" href="#149">149</a>         <strong class="jxr_keyword">public</strong> Set&lt;Object&gt; getAttributeKeys(<a href="../../../../org/apache/mina/common/IoSession.html">IoSession</a> session) {
<a name="150" href="#150">150</a>             <strong class="jxr_keyword">synchronized</strong> (attributes) {
<a name="151" href="#151">151</a>                 <strong class="jxr_keyword">return</strong> <strong class="jxr_keyword">new</strong> HashSet&lt;Object&gt;(attributes.keySet());
<a name="152" href="#152">152</a>             }
<a name="153" href="#153">153</a>         }
<a name="154" href="#154">154</a> 
<a name="155" href="#155">155</a>         <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">void</strong> dispose(<a href="../../../../org/apache/mina/common/IoSession.html">IoSession</a> session) <strong class="jxr_keyword">throws</strong> Exception {
<a name="156" href="#156">156</a>         }
<a name="157" href="#157">157</a>     }
<a name="158" href="#158">158</a>     
<a name="159" href="#159">159</a>     <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">class</strong> <a href="../../../../org/apache/mina/common/DefaultIoSessionDataStructureFactory.html">DefaultWriteRequestQueue</a> implements <a href="../../../../org/apache/mina/common/WriteRequestQueue.html">WriteRequestQueue</a> {
<a name="160" href="#160">160</a> 
<a name="161" href="#161">161</a>         <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">final</strong> Queue&lt;WriteRequest&gt; q = <strong class="jxr_keyword">new</strong> CircularQueue&lt;WriteRequest&gt;(16);
<a name="162" href="#162">162</a>         
<a name="163" href="#163">163</a>         <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">void</strong> dispose(<a href="../../../../org/apache/mina/common/IoSession.html">IoSession</a> session) {
<a name="164" href="#164">164</a>         }
<a name="165" href="#165">165</a>         
<a name="166" href="#166">166</a>         <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">void</strong> clear(<a href="../../../../org/apache/mina/common/IoSession.html">IoSession</a> session) {
<a name="167" href="#167">167</a>             q.clear();
<a name="168" href="#168">168</a>         }
<a name="169" href="#169">169</a> 
<a name="170" href="#170">170</a>         <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">synchronized</strong> <strong class="jxr_keyword">boolean</strong> isEmpty(<a href="../../../../org/apache/mina/common/IoSession.html">IoSession</a> session) {
<a name="171" href="#171">171</a>             <strong class="jxr_keyword">return</strong> q.isEmpty();
<a name="172" href="#172">172</a>         }
<a name="173" href="#173">173</a> 
<a name="174" href="#174">174</a>         <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">synchronized</strong> <strong class="jxr_keyword">void</strong> offer(<a href="../../../../org/apache/mina/common/IoSession.html">IoSession</a> session, <a href="../../../../org/apache/mina/common/WriteRequest.html">WriteRequest</a> writeRequest) {
<a name="175" href="#175">175</a>             q.offer(writeRequest);
<a name="176" href="#176">176</a>         }
<a name="177" href="#177">177</a> 
<a name="178" href="#178">178</a>         <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">synchronized</strong> <a href="../../../../org/apache/mina/common/WriteRequest.html">WriteRequest</a> poll(<a href="../../../../org/apache/mina/common/IoSession.html">IoSession</a> session) {
<a name="179" href="#179">179</a>             <strong class="jxr_keyword">return</strong> q.poll();
<a name="180" href="#180">180</a>         }
<a name="181" href="#181">181</a>         
<a name="182" href="#182">182</a>         @Override
<a name="183" href="#183">183</a>         <strong class="jxr_keyword">public</strong> String toString() {
<a name="184" href="#184">184</a>             <strong class="jxr_keyword">return</strong> q.toString();
<a name="185" href="#185">185</a>         }
<a name="186" href="#186">186</a>     }
<a name="187" href="#187">187</a> }
</pre>
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