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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en"><head><meta http-equiv="content-type" content="text/html; charset=UTF-8" /><title>SimpleIoProcessorPool xref</title><link type="text/css" rel="stylesheet" href="../../../../stylesheet.css" /></head><body><div id="overview"><a href="../../../../../apidocs/org/apache/mina/common/SimpleIoProcessorPool.html">View Javadoc</a></div><pre><a name="1" href="#1">1</a> <em class="jxr_comment">/*</em><a name="2" href="#2">2</a> <em class="jxr_comment"> * Licensed to the Apache Software Foundation (ASF) under one</em><a name="3" href="#3">3</a> <em class="jxr_comment"> * or more contributor license agreements. See the NOTICE file</em><a name="4" href="#4">4</a> <em class="jxr_comment"> * distributed with this work for additional information</em><a name="5" href="#5">5</a> <em class="jxr_comment"> * regarding copyright ownership. The ASF licenses this file</em><a name="6" href="#6">6</a> <em class="jxr_comment"> * to you under the Apache License, Version 2.0 (the</em><a name="7" href="#7">7</a> <em class="jxr_comment"> * "License"); you may not use this file except in compliance</em><a name="8" href="#8">8</a> <em class="jxr_comment"> * with the License. You may obtain a copy of the License at</em><a name="9" href="#9">9</a> <em class="jxr_comment"> *</em><a name="10" href="#10">10</a> <em class="jxr_comment"> * <a href="http://www.apache.org/licenses/LICENSE-2.0" target="alexandria_uri">http://www.apache.org/licenses/LICENSE-2.0</a></em><a name="11" href="#11">11</a> <em class="jxr_comment"> *</em><a name="12" href="#12">12</a> <em class="jxr_comment"> * Unless required by applicable law or agreed to in writing,</em><a name="13" href="#13">13</a> <em class="jxr_comment"> * software distributed under the License is distributed on an</em><a name="14" href="#14">14</a> <em class="jxr_comment"> * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY</em><a name="15" href="#15">15</a> <em class="jxr_comment"> * KIND, either express or implied. See the License for the</em><a name="16" href="#16">16</a> <em class="jxr_comment"> * specific language governing permissions and limitations</em><a name="17" href="#17">17</a> <em class="jxr_comment"> * under the License.</em><a name="18" href="#18">18</a> <em class="jxr_comment"> *</em><a name="19" href="#19">19</a> <em class="jxr_comment"> */</em><a name="20" href="#20">20</a> <strong class="jxr_keyword">package</strong> org.apache.mina.common;<a name="21" href="#21">21</a> <a name="22" href="#22">22</a> <strong class="jxr_keyword">import</strong> java.util.concurrent.Executor;<a name="23" href="#23">23</a> <strong class="jxr_keyword">import</strong> java.util.concurrent.ExecutorService;<a name="24" href="#24">24</a> <strong class="jxr_keyword">import</strong> java.util.concurrent.Executors;<a name="25" href="#25">25</a> <strong class="jxr_keyword">import</strong> java.util.concurrent.atomic.AtomicInteger;<a name="26" href="#26">26</a> <a name="27" href="#27">27</a> <strong class="jxr_keyword">import</strong> org.slf4j.Logger;<a name="28" href="#28">28</a> <strong class="jxr_keyword">import</strong> org.slf4j.LoggerFactory;<a name="29" href="#29">29</a> <a name="30" href="#30">30</a> <em class="jxr_javadoccomment">/**</em><a name="31" href="#31">31</a> <em class="jxr_javadoccomment"> * An {@link IoProcessor} pool that distributes {@link IoSession}s into one or more</em><a name="32" href="#32">32</a> <em class="jxr_javadoccomment"> * {@link IoProcessor}s. Most current transport implementations use this pool internally</em><a name="33" href="#33">33</a> <em class="jxr_javadoccomment"> * to perform better in a multi-core environment, and therefore, you won't need to </em><a name="34" href="#34">34</a> <em class="jxr_javadoccomment"> * use this pool directly unless you are running multiple {@link IoService}s in the</em><a name="35" href="#35">35</a> <em class="jxr_javadoccomment"> * same JVM.</em><a name="36" href="#36">36</a> <em class="jxr_javadoccomment"> * <p></em><a name="37" href="#37">37</a> <em class="jxr_javadoccomment"> * If you are running multiple {@link IoService}s, you could want to share the pool</em><a name="38" href="#38">38</a> <em class="jxr_javadoccomment"> * among all services. To do so, you can create a new {@link SimpleIoProcessorPool}</em><a name="39" href="#39">39</a> <em class="jxr_javadoccomment"> * instance by yourself and provide the pool as a constructor parameter when you</em><a name="40" href="#40">40</a> <em class="jxr_javadoccomment"> * create the services.</em><a name="41" href="#41">41</a> <em class="jxr_javadoccomment"> * <p></em><a name="42" href="#42">42</a> <em class="jxr_javadoccomment"> * This pool uses Java reflection API to create multiple {@link IoProcessor} instances.</em><a name="43" href="#43">43</a> <em class="jxr_javadoccomment"> * It tries to instantiate the processor in the following order:</em><a name="44" href="#44">44</a> <em class="jxr_javadoccomment"> * <ol></em><a name="45" href="#45">45</a> <em class="jxr_javadoccomment"> * <li>A public constructor with one {@link ExecutorService} parameter.</li></em><a name="46" href="#46">46</a> <em class="jxr_javadoccomment"> * <li>A public constructor with one {@link Executor} parameter.</li></em><a name="47" href="#47">47</a> <em class="jxr_javadoccomment"> * <li>A public default constructor</li></em><a name="48" href="#48">48</a> <em class="jxr_javadoccomment"> * </ol></em><a name="49" href="#49">49</a> <em class="jxr_javadoccomment"> * The following is an example for the NIO socket transport:</em><a name="50" href="#50">50</a> <em class="jxr_javadoccomment"> * <pre><code></em><a name="51" href="#51">51</a> <em class="jxr_javadoccomment"> * // Create a shared pool.</em><a name="52" href="#52">52</a> <em class="jxr_javadoccomment"> * SimpleIoProcessorPool&lt;NioSession&gt; pool = </em><a name="53" href="#53">53</a> <em class="jxr_javadoccomment"> * new SimpleIoProcessorPool&lt;NioSession&gt;(NioProcessor.class, 16);</em><a name="54" href="#54">54</a> <em class="jxr_javadoccomment"> * </em><a name="55" href="#55">55</a> <em class="jxr_javadoccomment"> * // Create two services that share the same pool.</em><a name="56" href="#56">56</a> <em class="jxr_javadoccomment"> * SocketAcceptor acceptor = new NioSocketAcceptor(pool);</em><a name="57" href="#57">57</a> <em class="jxr_javadoccomment"> * SocketConnector connector = new NioSocketConnector(pool);</em><a name="58" href="#58">58</a> <em class="jxr_javadoccomment"> * </em><a name="59" href="#59">59</a> <em class="jxr_javadoccomment"> * ...</em><a name="60" href="#60">60</a> <em class="jxr_javadoccomment"> * </em><a name="61" href="#61">61</a> <em class="jxr_javadoccomment"> * // Release related resources.</em><a name="62" href="#62">62</a> <em class="jxr_javadoccomment"> * connector.dispose();</em><a name="63" href="#63">63</a> <em class="jxr_javadoccomment"> * acceptor.dispose();</em><a name="64" href="#64">64</a> <em class="jxr_javadoccomment"> * pool.dispose();</em><a name="65" href="#65">65</a> <em class="jxr_javadoccomment"> * </code></pre></em><a name="66" href="#66">66</a> <em class="jxr_javadoccomment"> * </em><a name="67" href="#67">67</a> <em class="jxr_javadoccomment"> * @author The Apache MINA Project (dev@mina.apache.org)</em><a name="68" href="#68">68</a> <em class="jxr_javadoccomment"> * @version $Rev: 609876 $, $Date: 2008-01-07 22:40:38 -0700 (Mon, 07 Jan 2008) $</em><a name="69" href="#69">69</a> <em class="jxr_javadoccomment"> * </em><a name="70" href="#70">70</a> <em class="jxr_javadoccomment"> * @param <T> the type of the {@link IoSession} to be managed by the specified</em><a name="71" href="#71">71</a> <em class="jxr_javadoccomment"> * {@link IoProcessor}.</em><a name="72" href="#72">72</a> <em class="jxr_javadoccomment"> */</em><a name="73" href="#73">73</a> <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">class</strong> SimpleIoProcessorPool<T <strong class="jxr_keyword">extends</strong> AbstractIoSession> implements IoProcessor<T> {<a name="74" href="#74">74</a> <a name="75" href="#75">75</a> <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">int</strong> DEFAULT_SIZE = Runtime.getRuntime().availableProcessors() + 1;<a name="76" href="#76">76</a> <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">final</strong> <a href="../../../../org/apache/mina/common/AttributeKey.html">AttributeKey</a> PROCESSOR = <strong class="jxr_keyword">new</strong> <a href="../../../../org/apache/mina/common/AttributeKey.html">AttributeKey</a>(SimpleIoProcessorPool.<strong class="jxr_keyword">class</strong>, <span class="jxr_string">"processor"</span>);<a name="77" href="#77">77</a> <a name="78" href="#78">78</a> <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">final</strong> Logger logger = LoggerFactory.getLogger(getClass());<a name="79" href="#79">79</a> <a name="80" href="#80">80</a> <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">final</strong> IoProcessor<T>[] pool;<a name="81" href="#81">81</a> <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">final</strong> AtomicInteger processorDistributor = <strong class="jxr_keyword">new</strong> AtomicInteger();<a name="82" href="#82">82</a> <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">final</strong> Executor executor;<a name="83" href="#83">83</a> <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">boolean</strong> createdExecutor;<a name="84" href="#84">84</a> <a name="85" href="#85">85</a> <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">final</strong> Object disposalLock = <strong class="jxr_keyword">new</strong> Object();<a name="86" href="#86">86</a> <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">volatile</strong> <strong class="jxr_keyword">boolean</strong> disposing;<a name="87" href="#87">87</a> <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">volatile</strong> <strong class="jxr_keyword">boolean</strong> disposed;<a name="88" href="#88">88</a> <a name="89" href="#89">89</a> <strong class="jxr_keyword">public</strong> <a href="../../../../org/apache/mina/common/SimpleIoProcessorPool.html">SimpleIoProcessorPool</a>(Class<? <strong class="jxr_keyword">extends</strong> IoProcessor<T>> processorType) {<a name="90" href="#90">90</a> <strong class="jxr_keyword">this</strong>(processorType, <strong class="jxr_keyword">null</strong>, DEFAULT_SIZE);<a name="91" href="#91">91</a> }<a name="92" href="#92">92</a> <a name="93" href="#93">93</a> <strong class="jxr_keyword">public</strong> <a href="../../../../org/apache/mina/common/SimpleIoProcessorPool.html">SimpleIoProcessorPool</a>(Class<? <strong class="jxr_keyword">extends</strong> IoProcessor<T>> processorType, <strong class="jxr_keyword">int</strong> size) {<a name="94" href="#94">94</a> <strong class="jxr_keyword">this</strong>(processorType, <strong class="jxr_keyword">null</strong>, size);<a name="95" href="#95">95</a> }<a name="96" href="#96">96</a> <a name="97" href="#97">97</a> <strong class="jxr_keyword">public</strong> <a href="../../../../org/apache/mina/common/SimpleIoProcessorPool.html">SimpleIoProcessorPool</a>(Class<? <strong class="jxr_keyword">extends</strong> IoProcessor<T>> processorType, Executor executor) {<a name="98" href="#98">98</a> <strong class="jxr_keyword">this</strong>(processorType, executor, DEFAULT_SIZE);<a name="99" href="#99">99</a> }<a name="100" href="#100">100</a> <a name="101" href="#101">101</a> @SuppressWarnings(<span class="jxr_string">"unchecked"</span>)<a name="102" href="#102">102</a> <strong class="jxr_keyword">public</strong> <a href="../../../../org/apache/mina/common/SimpleIoProcessorPool.html">SimpleIoProcessorPool</a>(Class<? <strong class="jxr_keyword">extends</strong> IoProcessor<T>> processorType, Executor executor, <strong class="jxr_keyword">int</strong> size) {<a name="103" href="#103">103</a> <strong class="jxr_keyword">if</strong> (processorType == <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">"processorType"</span>);<a name="105" href="#105">105</a> }<a name="106" href="#106">106</a> <strong class="jxr_keyword">if</strong> (size <= 0) {<a name="107" href="#107">107</a> <strong class="jxr_keyword">throw</strong> <strong class="jxr_keyword">new</strong> IllegalArgumentException(<a name="108" href="#108">108</a> <span class="jxr_string">"size: "</span> + size + <span class="jxr_string">" (expected: positive integer)"</span>);<a name="109" href="#109">109</a> }<a name="110" href="#110">110</a> <a name="111" href="#111">111</a> <strong class="jxr_keyword">if</strong> (executor == <strong class="jxr_keyword">null</strong>) {<a name="112" href="#112">112</a> <strong class="jxr_keyword">this</strong>.executor = executor = Executors.newCachedThreadPool();<a name="113" href="#113">113</a> <strong class="jxr_keyword">this</strong>.createdExecutor = <strong class="jxr_keyword">true</strong>;<a name="114" href="#114">114</a> } <strong class="jxr_keyword">else</strong> {<a name="115" href="#115">115</a> <strong class="jxr_keyword">this</strong>.executor = executor;<a name="116" href="#116">116</a> <strong class="jxr_keyword">this</strong>.createdExecutor = false;<a name="117" href="#117">117</a> }<a name="118" href="#118">118</a> <a name="119" href="#119">119</a> pool = <strong class="jxr_keyword">new</strong> <a href="../../../../org/apache/mina/common/IoProcessor.html">IoProcessor</a>[size];<a name="120" href="#120">120</a> <a name="121" href="#121">121</a> <strong class="jxr_keyword">boolean</strong> success = false;<a name="122" href="#122">122</a> <strong class="jxr_keyword">try</strong> {<a name="123" href="#123">123</a> <strong class="jxr_keyword">for</strong> (<strong class="jxr_keyword">int</strong> i = 0; i < pool.length; i ++) {<a name="124" href="#124">124</a> IoProcessor<T> processor = <strong class="jxr_keyword">null</strong>;<a name="125" href="#125">125</a> <a name="126" href="#126">126</a> <em class="jxr_comment">// Try to create a new processor with a proper constructor.</em><a name="127" href="#127">127</a> <strong class="jxr_keyword">try</strong> {⌨️ 快捷键说明
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