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3.0.6-SNAPSHOT
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<li class="toctree-l1"><a class="reference external" href="https://alibaba.github.io/arthas/en/">English Docs</a></li>
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<li class="toctree-l1 current"><a class="current reference internal" href="#">快速入门</a><ul>
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<li class="toctree-l2"><a class="reference internal" href="#demo">1. 启动Demo</a></li>
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<li class="toctree-l2"><a class="reference internal" href="#arthas">2. 启动arthas</a></li>
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<li class="toctree-l2"><a class="reference internal" href="#dashboard">3. 查看dashboard</a></li>
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<li class="toctree-l2"><a class="reference internal" href="#sysenvmain-class">4. 通过sysenv命令来获取到进程的Main Class</a></li>
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<li class="toctree-l2"><a class="reference internal" href="#jadmain-class">5. 通过jad来反编绎Main Class</a></li>
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<li class="toctree-l2"><a class="reference internal" href="#watch">6. watch</a></li>
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<li class="toctree-l2"><a class="reference internal" href="#arthas">5. 退出arthas</a></li>
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<div class="section" id="">
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<span id="id1"></span><h1>快速入门<a class="headerlink" href="#" title="永久链接至标题">¶</a></h1>
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<div class="section" id="demo">
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<span id="demo"></span><h2>1. 启动Demo<a class="headerlink" href="#demo" title="永久链接至标题">¶</a></h2>
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<div class="highlight-bash notranslate"><div class="highlight"><pre><span></span>wget https://alibaba.github.io/arthas/arthas-demo.jar
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java -jar arthas-demo.jar
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</pre></div>
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</div>
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<p><code class="docutils literal notranslate"><span class="pre">arthas-demo</span></code>是一个简单的程序，每隔一秒生成一个随机数，再执行质因式分解，并打印出分解结果。</p>
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<p><code class="docutils literal notranslate"><span class="pre">arthas-demo</span></code>源代码：<a class="reference external" href="https://github.com/alibaba/arthas/blob/master/demo/src/main/java/demo/MathGame.java">查看</a></p>
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</div>
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<div class="section" id="arthas">
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<span id="arthas"></span><h2>2. 启动arthas<a class="headerlink" href="#arthas" title="永久链接至标题">¶</a></h2>
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<p>在命令行下面执行：</p>
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<div class="highlight-bash notranslate"><div class="highlight"><pre><span></span>wget https://alibaba.github.io/arthas/arthas-boot.jar
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java -jar arthas-boot.jar
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</pre></div>
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</div>
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<ul class="simple">
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<li>执行该程序的用户需要和目标进程具有相同的权限。比如以<code class="docutils literal notranslate"><span class="pre">admin</span></code>用户来执行：<code class="docutils literal notranslate"><span class="pre">sudo</span> <span class="pre">su</span> <span class="pre">admin</span> <span class="pre">&&</span> <span class="pre">java</span> <span class="pre">-jar</span> <span class="pre">arthas-boot.jar</span></code> 或 <code class="docutils literal notranslate"><span class="pre">sudo</span> <span class="pre">-u</span> <span class="pre">admin</span> <span class="pre">-EH</span> <span class="pre">java</span> <span class="pre">-jar</span> <span class="pre">arthas-boot.jar</span></code>。</li>
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<li>如果attatch不上目标进程，可以查看<code class="docutils literal notranslate"><span class="pre">~/logs/arthas/</span></code> 目录下的日志。</li>
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<li>如果下载速度比较慢，可以使用aliyun的镜像：<code class="docutils literal notranslate"><span class="pre">java</span> <span class="pre">-jar</span> <span class="pre">arthas-boot.jar</span> <span class="pre">--repo-mirror</span> <span class="pre">aliyun</span> <span class="pre">--use-http</span></code></li>
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<li><code class="docutils literal notranslate"><span class="pre">java</span> <span class="pre">-jar</span> <span class="pre">arthas-boot.jar</span> <span class="pre">-h</span></code> 打印更多参数信息。</li>
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</ul>
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<p>选择应用java进程：</p>
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<div class="highlight-default notranslate"><div class="highlight"><pre><span></span>$ $ java -jar arthas-boot.jar
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* [1]: 35542
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[2]: 71560 arthas-demo.jar
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</pre></div>
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</div>
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<p>Demo进程是第2个，则输入2，再输入回车/enter。Arthas会attach到目标进程上，并输出日志：</p>
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<div class="highlight-default notranslate"><div class="highlight"><pre><span></span>[INFO] Try to attach process 71560
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[INFO] Attach process 71560 success.
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[INFO] arthas-client connect 127.0.0.1 3658
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,---. ,------. ,--------.,--. ,--. ,---. ,---.
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/ O \ | .--. ''--. .--'| '--' | / O \ ' .-'
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| .-. || '--'.' | | | .--. || .-. |`. `-.
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| | | || |\ \ | | | | | || | | |.-' |
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`--' `--'`--' '--' `--' `--' `--'`--' `--'`-----'
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wiki: https://alibaba.github.io/arthas
|
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version: 3.0.5.20181127201536
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pid: 71560
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time: 2018-11-28 19:16:24
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$
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</pre></div>
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</div>
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</div>
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<div class="section" id="dashboard">
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<span id="dashboard"></span><h2>3. 查看dashboard<a class="headerlink" href="#dashboard" title="永久链接至标题">¶</a></h2>
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<p>输入<a class="reference internal" href="dashboard.html"><span class="doc">dashboard</span></a>，按enter/回车，会展示当前进程的信息，按<code class="docutils literal notranslate"><span class="pre">ctrl+c</span></code>可以中断执行。</p>
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<div class="highlight-default notranslate"><div class="highlight"><pre><span></span>$ dashboard
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ID NAME GROUP PRIORI STATE %CPU TIME INTERRU DAEMON
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17 pool-2-thread-1 system 5 WAITIN 67 0:0 false false
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27 Timer-for-arthas-dashb system 10 RUNNAB 32 0:0 false true
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11 AsyncAppender-Worker-a system 9 WAITIN 0 0:0 false true
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9 Attach Listener system 9 RUNNAB 0 0:0 false true
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3 Finalizer system 8 WAITIN 0 0:0 false true
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2 Reference Handler system 10 WAITIN 0 0:0 false true
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4 Signal Dispatcher system 9 RUNNAB 0 0:0 false true
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26 as-command-execute-dae system 10 TIMED_ 0 0:0 false true
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13 job-timeout system 9 TIMED_ 0 0:0 false true
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1 main main 5 TIMED_ 0 0:0 false false
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14 nioEventLoopGroup-2-1 system 10 RUNNAB 0 0:0 false false
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18 nioEventLoopGroup-2-2 system 10 RUNNAB 0 0:0 false false
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23 nioEventLoopGroup-2-3 system 10 RUNNAB 0 0:0 false false
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15 nioEventLoopGroup-3-1 system 10 RUNNAB 0 0:0 false false
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Memory used total max usage GC
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heap 32M 155M 1820M 1.77% gc.ps_scavenge.count 4
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ps_eden_space 14M 65M 672M 2.21% gc.ps_scavenge.time(m 166
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ps_survivor_space 4M 5M 5M s)
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ps_old_gen 12M 85M 1365M 0.91% gc.ps_marksweep.count 0
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nonheap 20M 23M -1 gc.ps_marksweep.time( 0
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code_cache 3M 5M 240M 1.32% ms)
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Runtime
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os.name Mac OS X
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os.version 10.13.4
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java.version 1.8.0_162
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java.home /Library/Java/JavaVir
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tualMachines/jdk1.8.0
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_162.jdk/Contents/Hom
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e/jre
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</pre></div>
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</div>
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</div>
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<div class="section" id="sysenvmain-class">
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<span id="sysenvmain-class"></span><h2>4. 通过sysenv命令来获取到进程的Main Class<a class="headerlink" href="#sysenvmain-class" title="永久链接至标题">¶</a></h2>
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<div class="highlight-default notranslate"><div class="highlight"><pre><span></span>$ sysenv | grep MAIN
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JAVA_MAIN_CLASS_71560 demo.MathGame
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</pre></div>
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</div>
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</div>
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<div class="section" id="jadmain-class">
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<span id="jadmain-class"></span><h2>5. 通过jad来反编绎Main Class<a class="headerlink" href="#jadmain-class" title="永久链接至标题">¶</a></h2>
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<div class="highlight-java notranslate"><div class="highlight"><pre><span></span>$ jad demo.MathGame
|
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|
ClassLoader:
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+-sun.misc.Launcher$AppClassLoader@3d4eac69
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+-sun.misc.Launcher$ExtClassLoader@66350f69
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Location:
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/tmp/arthas-demo.jar
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/*
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|
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* Decompiled with CFR 0_132.
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*/
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package demo;
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import java.io.PrintStream;
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import java.util.ArrayList;
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import java.util.Iterator;
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import java.util.List;
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import java.util.Random;
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import java.util.concurrent.TimeUnit;
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public class MathGame {
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private static Random random = new Random();
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private int illegalArgumentCount = 0;
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public static void main(String[] args) throws InterruptedException {
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MathGame game = new MathGame();
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do {
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game.run();
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TimeUnit.SECONDS.sleep(1L);
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} while (true);
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}
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public void run() throws InterruptedException {
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try {
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int number = random.nextInt();
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List<Integer> primeFactors = this.primeFactors(number);
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MathGame.print(number, primeFactors);
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}
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catch (Exception e) {
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System.out.println(String.format("illegalArgumentCount:%3d, ", this.illegalArgumentCount) + e.getMessage());
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}
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}
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public static void print(int number, List<Integer> primeFactors) {
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StringBuffer sb = new StringBuffer("" + number + "=");
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Iterator<Integer> iterator = primeFactors.iterator();
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while (iterator.hasNext()) {
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int factor = iterator.next();
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sb.append(factor).append('*');
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}
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if (sb.charAt(sb.length() - 1) == '*') {
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sb.deleteCharAt(sb.length() - 1);
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}
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System.out.println(sb);
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}
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public List<Integer> primeFactors(int number) {
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if (number < 2) {
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++this.illegalArgumentCount;
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throw new IllegalArgumentException("number is: " + number + ", need >= 2");
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}
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ArrayList<Integer> result = new ArrayList<Integer>();
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int i = 2;
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while (i <= number) {
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if (number % i == 0) {
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result.add(i);
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number /= i;
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i = 2;
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continue;
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}
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++i;
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}
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return result;
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}
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}
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Affect(row-cnt:1) cost in 970 ms.
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</pre></div>
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</div>
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</div>
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<div class="section" id="watch">
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<span id="watch"></span><h2>6. watch<a class="headerlink" href="#watch" title="永久链接至标题">¶</a></h2>
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<p>通过<a class="reference internal" href="watch.html"><span class="doc">watch</span></a>命令来查看<code class="docutils literal notranslate"><span class="pre">demo.MathGame#primeFactors</span></code>函数的返回值：</p>
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<div class="highlight-default notranslate"><div class="highlight"><pre><span></span>$ watch demo.MathGame primeFactors returnObj
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Press Ctrl+C to abort.
|
|
|
Affect(class-cnt:1 , method-cnt:1) cost in 107 ms.
|
|
|
ts=2018-11-28 19:22:30; [cost=1.715367ms] result=null
|
|
|
ts=2018-11-28 19:22:31; [cost=0.185203ms] result=null
|
|
|
ts=2018-11-28 19:22:32; [cost=19.012416ms] result=@ArrayList[
|
|
|
@Integer[5],
|
|
|
@Integer[47],
|
|
|
@Integer[2675531],
|
|
|
]
|
|
|
ts=2018-11-28 19:22:33; [cost=0.311395ms] result=@ArrayList[
|
|
|
@Integer[2],
|
|
|
@Integer[5],
|
|
|
@Integer[317],
|
|
|
@Integer[503],
|
|
|
@Integer[887],
|
|
|
]
|
|
|
ts=2018-11-28 19:22:34; [cost=10.136007ms] result=@ArrayList[
|
|
|
@Integer[2],
|
|
|
@Integer[2],
|
|
|
@Integer[3],
|
|
|
@Integer[3],
|
|
|
@Integer[31],
|
|
|
@Integer[717593],
|
|
|
]
|
|
|
ts=2018-11-28 19:22:35; [cost=29.969732ms] result=@ArrayList[
|
|
|
@Integer[5],
|
|
|
@Integer[29],
|
|
|
@Integer[7651739],
|
|
|
]
|
|
|
</pre></div>
|
|
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</div>
|
|
|
<p>更多的功能可以查看<a class="reference internal" href="advanced-use.html"><span class="doc">进阶使用</span></a>。</p>
|
|
|
</div>
|
|
|
<div class="section" id="arthas">
|
|
|
<span id="id2"></span><h2>5. 退出arthas<a class="headerlink" href="#arthas" title="永久链接至标题">¶</a></h2>
|
|
|
<p>如果只是退出当前的连接，可以用<code class="docutils literal notranslate"><span class="pre">quit</span></code>或者<code class="docutils literal notranslate"><span class="pre">exit</span></code>命令。Attach到目标进程上的arthas还会继续运行，端口会保持开放，下次连接时可以直接连接上。</p>
|
|
|
<p>如果想完全退出arthas，可以执行<code class="docutils literal notranslate"><span class="pre">shutdown</span></code>命令。</p>
|
|
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