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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>VmPipeSessionCrossCommunicationTest xref</title><link type="text/css" rel="stylesheet" href="../../../../../stylesheet.css" /></head><body><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> <strong class="jxr_keyword">package</strong> org.apache.mina.transport.vmpipe;<a name="20" href="#20">20</a> <a name="21" href="#21">21</a> <strong class="jxr_keyword">import</strong> java.lang.management.ManagementFactory;<a name="22" href="#22">22</a> <strong class="jxr_keyword">import</strong> java.lang.management.ThreadInfo;<a name="23" href="#23">23</a> <strong class="jxr_keyword">import</strong> java.lang.management.ThreadMXBean;<a name="24" href="#24">24</a> <strong class="jxr_keyword">import</strong> java.util.concurrent.CountDownLatch;<a name="25" href="#25">25</a> <strong class="jxr_keyword">import</strong> java.util.concurrent.TimeUnit;<a name="26" href="#26">26</a> <strong class="jxr_keyword">import</strong> java.util.concurrent.atomic.AtomicReference;<a name="27" href="#27">27</a> <a name="28" href="#28">28</a> <strong class="jxr_keyword">import</strong> junit.framework.TestCase;<a name="29" href="#29">29</a> <a name="30" href="#30">30</a> <strong class="jxr_keyword">import</strong> org.apache.mina.common.ConnectFuture;<a name="31" href="#31">31</a> <strong class="jxr_keyword">import</strong> org.apache.mina.common.IoAcceptor;<a name="32" href="#32">32</a> <strong class="jxr_keyword">import</strong> org.apache.mina.common.IoConnector;<a name="33" href="#33">33</a> <strong class="jxr_keyword">import</strong> org.apache.mina.common.IoHandlerAdapter;<a name="34" href="#34">34</a> <strong class="jxr_keyword">import</strong> org.apache.mina.common.IoSession;<a name="35" href="#35">35</a> <a name="36" href="#36">36</a> <em class="jxr_javadoccomment">/**</em><a name="37" href="#37">37</a> <em class="jxr_javadoccomment"> * @author Apache Mina Project (dev@mina.apache.org)</em><a name="38" href="#38">38</a> <em class="jxr_javadoccomment"> * @version $Rev: $, $Date: $</em><a name="39" href="#39">39</a> <em class="jxr_javadoccomment"> */</em><a name="40" href="#40">40</a> <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">class</strong> <a href="../../../../../org/apache/mina/transport/vmpipe/VmPipeSessionCrossCommunicationTest.html">VmPipeSessionCrossCommunicationTest</a> <strong class="jxr_keyword">extends</strong> TestCase {<a name="41" href="#41">41</a> <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">void</strong> testOneSessionTalkingBackAndForthDoesNotDeadlock() <strong class="jxr_keyword">throws</strong> Exception {<a name="42" href="#42">42</a> <strong class="jxr_keyword">final</strong> VmPipeAddress address = <strong class="jxr_keyword">new</strong> VmPipeAddress(1);<a name="43" href="#43">43</a> <strong class="jxr_keyword">final</strong> IoConnector connector = <strong class="jxr_keyword">new</strong> VmPipeConnector();<a name="44" href="#44">44</a> <strong class="jxr_keyword">final</strong> AtomicReference<IoSession> c1 = <strong class="jxr_keyword">new</strong> AtomicReference<IoSession>();<a name="45" href="#45">45</a> <strong class="jxr_keyword">final</strong> CountDownLatch latch = <strong class="jxr_keyword">new</strong> CountDownLatch(1);<a name="46" href="#46">46</a> <strong class="jxr_keyword">final</strong> CountDownLatch messageCount = <strong class="jxr_keyword">new</strong> CountDownLatch(2);<a name="47" href="#47">47</a> IoAcceptor acceptor = <strong class="jxr_keyword">new</strong> VmPipeAcceptor();<a name="48" href="#48">48</a> <a name="49" href="#49">49</a> acceptor.setHandler(<strong class="jxr_keyword">new</strong> IoHandlerAdapter() {<a name="50" href="#50">50</a> @Override<a name="51" href="#51">51</a> <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">void</strong> messageReceived(IoSession session, Object message) <strong class="jxr_keyword">throws</strong> Exception {<a name="52" href="#52">52</a> System.out.println(Thread.currentThread().getName() + <span class="jxr_string">": "</span> + message);<a name="53" href="#53">53</a> <a name="54" href="#54">54</a> <strong class="jxr_keyword">if</strong> (<span class="jxr_string">"start"</span>.equals(message)) {<a name="55" href="#55">55</a> session.write(<span class="jxr_string">"open new"</span>);<a name="56" href="#56">56</a> } <strong class="jxr_keyword">else</strong> <strong class="jxr_keyword">if</strong> (<span class="jxr_string">"re-use c1"</span>.equals(message)) {<a name="57" href="#57">57</a> session.write(<span class="jxr_string">"tell me something on c1 now"</span>);<a name="58" href="#58">58</a> } <strong class="jxr_keyword">else</strong> <strong class="jxr_keyword">if</strong> (((String) message).startsWith(<span class="jxr_string">"please don't deadlock"</span>)) {<a name="59" href="#59">59</a> messageCount.countDown();<a name="60" href="#60">60</a> } <strong class="jxr_keyword">else</strong> {<a name="61" href="#61">61</a> fail(<span class="jxr_string">"unexpected message received "</span> + message);<a name="62" href="#62">62</a> }<a name="63" href="#63">63</a> }<a name="64" href="#64">64</a> });<a name="65" href="#65">65</a> acceptor.bind(address);<a name="66" href="#66">66</a> <a name="67" href="#67">67</a> connector.setHandler(<strong class="jxr_keyword">new</strong> IoHandlerAdapter() {<a name="68" href="#68">68</a> @Override<a name="69" href="#69">69</a> <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">void</strong> messageReceived(IoSession session, Object message) <strong class="jxr_keyword">throws</strong> Exception {<a name="70" href="#70">70</a> System.out.println(Thread.currentThread().getName() + <span class="jxr_string">": "</span> + message);<a name="71" href="#71">71</a> <a name="72" href="#72">72</a> <strong class="jxr_keyword">if</strong> (<span class="jxr_string">"open new"</span>.equals(message)) {<a name="73" href="#73">73</a> System.out.println(<span class="jxr_string">"opening c2 from "</span> + Thread.currentThread().getName());<a name="74" href="#74">74</a> <a name="75" href="#75">75</a> IoConnector c2 = <strong class="jxr_keyword">new</strong> VmPipeConnector();<a name="76" href="#76">76</a> c2.setHandler(<strong class="jxr_keyword">new</strong> IoHandlerAdapter() {<a name="77" href="#77">77</a> @Override<a name="78" href="#78">78</a> <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">void</strong> sessionOpened(IoSession session) <strong class="jxr_keyword">throws</strong> Exception {<a name="79" href="#79">79</a> session.write(<span class="jxr_string">"re-use c1"</span>);<a name="80" href="#80">80</a> }<a name="81" href="#81">81</a> <a name="82" href="#82">82</a> @Override<a name="83" href="#83">83</a> <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">void</strong> messageReceived(IoSession session, Object message) <strong class="jxr_keyword">throws</strong> Exception {<a name="84" href="#84">84</a> System.out.println(Thread.currentThread().getName() + <span class="jxr_string">": "</span> + message);<a name="85" href="#85">85</a> <a name="86" href="#86">86</a> <strong class="jxr_keyword">if</strong> (<span class="jxr_string">"tell me something on c1 now"</span>.equals(message)) {<a name="87" href="#87">87</a> latch.countDown();<a name="88" href="#88">88</a> c1.get().write(<span class="jxr_string">"please don't deadlock via c1"</span>);<a name="89" href="#89">89</a> } <strong class="jxr_keyword">else</strong> {<a name="90" href="#90">90</a> fail(<span class="jxr_string">"unexpected message received "</span> + message);<a name="91" href="#91">91</a> }<a name="92" href="#92">92</a> }<a name="93" href="#93">93</a> });<a name="94" href="#94">94</a> <a name="95" href="#95">95</a> ConnectFuture c2Future = c2.connect(address);<a name="96" href="#96">96</a> <a name="97" href="#97">97</a> c2Future.await();<a name="98" href="#98">98</a> <a name="99" href="#99">99</a> latch.await();<a name="100" href="#100">100</a> <a name="101" href="#101">101</a> c2Future.getSession().write(<span class="jxr_string">"please don't deadlock via c2"</span>);<a name="102" href="#102">102</a> } <strong class="jxr_keyword">else</strong> {<a name="103" href="#103">103</a> fail(<span class="jxr_string">"unexpeced message received "</span> + message);<a name="104" href="#104">104</a> }<a name="105" href="#105">105</a> }<a name="106" href="#106">106</a> });<a name="107" href="#107">107</a> <a name="108" href="#108">108</a> ConnectFuture future = connector.connect(address);<a name="109" href="#109">109</a> <a name="110" href="#110">110</a> future.await();<a name="111" href="#111">111</a> <a name="112" href="#112">112</a> c1.set(future.getSession());<a name="113" href="#113">113</a> c1.get().write(<span class="jxr_string">"start"</span>);<a name="114" href="#114">114</a> <a name="115" href="#115">115</a> ThreadMXBean threadMXBean = ManagementFactory.getThreadMXBean();<a name="116" href="#116">116</a> <a name="117" href="#117">117</a> <strong class="jxr_keyword">while</strong> (!messageCount.await(100, TimeUnit.MILLISECONDS)) {<a name="118" href="#118">118</a> <strong class="jxr_keyword">long</strong>[] threads = threadMXBean.findMonitorDeadlockedThreads();<a name="119" href="#119">119</a> <a name="120" href="#120">120</a> <strong class="jxr_keyword">if</strong> (<strong class="jxr_keyword">null</strong> != threads) {<a name="121" href="#121">121</a> StringBuffer sb = <strong class="jxr_keyword">new</strong> StringBuffer(256);<a name="122" href="#122">122</a> ThreadInfo[] infos = threadMXBean.getThreadInfo(threads, Integer.MAX_VALUE);<a name="123" href="#123">123</a> <a name="124" href="#124">124</a> <strong class="jxr_keyword">for</strong> (ThreadInfo info : infos) {<a name="125" href="#125">125</a> sb.append(info.getThreadName())<a name="126" href="#126">126</a> .append(<span class="jxr_string">" blocked on "</span>)<a name="127" href="#127">127</a> .append(info.getLockName())<a name="128" href="#128">128</a> .append(<span class="jxr_string">" owned by "</span>)<a name="129" href="#129">129</a> .append(info.getLockOwnerName())<a name="130" href="#130">130</a> .append(<span class="jxr_string">"\n"</span>);<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">for</strong> (ThreadInfo info : infos) {<a name="134" href="#134">134</a> sb.append(<span class="jxr_string">"\nStack for "</span>).append(info.getThreadName()).append(<span class="jxr_string">"\n"</span>);<a name="135" href="#135">135</a> <strong class="jxr_keyword">for</strong> (StackTraceElement element : info.getStackTrace()) {<a name="136" href="#136">136</a> sb.append(<span class="jxr_string">"\t"</span>).append(element).append(<span class="jxr_string">"\n"</span>);<a name="137" href="#137">137</a> }<a name="138" href="#138">138</a> }<a name="139" href="#139">139</a> <a name="140" href="#140">140</a> fail(<span class="jxr_string">"deadlocked! \n"</span> + sb);<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> acceptor.setCloseOnDeactivation(false);<a name="145" href="#145">145</a> acceptor.dispose();<a name="146" href="#146">146</a> }<a name="147" href="#147">147</a> }</pre><hr/><div id="footer">This page was automatically generated by <a href="http://maven.apache.org/">Maven</a></div></body></html>⌨️ 快捷键说明
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