<!DOCTYPE html>
<!--[if IE 8]><html class="no-js lt-ie9" lang="en" > <![endif]-->
<!--[if gt IE 8]><!--> <html class="no-js" lang="en" > <!--<![endif]-->
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>watch — Arthas 3.0.6-SNAPSHOT documentation</title>
<link rel="shortcut icon" href="_static/favicon.ico"/>
<link rel="stylesheet" href="_static/css/theme.css" type="text/css" />
<link rel="stylesheet" href="_static/pygments.css" type="text/css" />
<link rel="stylesheet" href="_static/overrides.css" type="text/css" />
<link rel="index" title="Index" href="genindex.html" />
<link rel="search" title="Search" href="search.html" />
<link rel="next" title="Fundamental Fields in Expressions" href="advice-class.html" />
<link rel="prev" title="monitor" href="monitor.html" />
<script src="_static/center_page.js"></script>
<script src="_static/js/modernizr.min.js"></script>
</head>
<body class="wy-body-for-nav">
<div class="wy-grid-for-nav">
<nav data-toggle="wy-nav-shift" class="wy-nav-side">
<div class="wy-side-scroll">
<div class="wy-side-nav-search">
<a href="index.html" class="icon icon-home"> Arthas
</a>
<div class="version">
3.0.6-SNAPSHOT
</div>
<div role="search">
<form id="rtd-search-form" class="wy-form" action="search.html" method="get">
<input type="text" name="q" placeholder="Search docs" />
<input type="hidden" name="check_keywords" value="yes" />
<input type="hidden" name="area" value="default" />
</form>
</div>
</div>
<div class="wy-menu wy-menu-vertical" data-spy="affix" role="navigation" aria-label="main navigation">
<ul class="current">
<li class="toctree-l1"><a class="reference internal" href="install-detail.html">Installation</a></li>
<li class="toctree-l1"><a class="reference internal" href="quick-start.html">Quick start</a></li>
<li class="toctree-l1"><a class="reference internal" href="advanced-use.html">Advanced usage</a></li>
<li class="toctree-l1 current"><a class="reference internal" href="commands.html">Commands</a><ul class="current">
<li class="toctree-l2"><a class="reference internal" href="dashboard.html">dashboard</a></li>
<li class="toctree-l2"><a class="reference internal" href="thread.html">thread</a></li>
<li class="toctree-l2"><a class="reference internal" href="jvm.html">jvm</a></li>
<li class="toctree-l2"><a class="reference internal" href="sysprop.html">sysprop</a></li>
<li class="toctree-l2"><a class="reference internal" href="sysenv.html">sysenv</a></li>
<li class="toctree-l2"><a class="reference internal" href="getstatic.html">getstatic</a></li>
<li class="toctree-l2"><a class="reference internal" href="ognl.html">ognl</a></li>
<li class="toctree-l2"><a class="reference internal" href="sc.html">sc</a></li>
<li class="toctree-l2"><a class="reference internal" href="sm.html">sm</a></li>
<li class="toctree-l2"><a class="reference internal" href="dump.html">dump</a></li>
<li class="toctree-l2"><a class="reference internal" href="jad.html">jad</a></li>
<li class="toctree-l2"><a class="reference internal" href="classloader.html">classloader</a></li>
<li class="toctree-l2"><a class="reference internal" href="redefine.html">redefine</a></li>
<li class="toctree-l2"><a class="reference internal" href="monitor.html">monitor</a></li>
<li class="toctree-l2 current"><a class="current reference internal" href="#">watch</a><ul>
<li class="toctree-l3"><a class="reference internal" href="#parameters-options">Parameters & Options</a><ul>
<li class="toctree-l4"><a class="reference internal" href="advice-class.html">Critical fields in</a></li>
<li class="toctree-l4"><a class="reference external" href="https://github.com/alibaba/arthas/issues/71">Special usages</a></li>
<li class="toctree-l4"><a class="reference external" href="https://commons.apache.org/proper/commons-ognl/language-guide.html">OGNL official guide</a></li>
</ul>
</li>
<li class="toctree-l3"><a class="reference internal" href="#usage">Usage</a><ul>
<li class="toctree-l4"><a class="reference internal" href="#check-the-out-parameters-and-return-value">Check the <code class="docutils literal notranslate"><span class="pre">out</span> <span class="pre">parameters</span></code> and <code class="docutils literal notranslate"><span class="pre">return</span> <span class="pre">value</span></code></a></li>
<li class="toctree-l4"><a class="reference internal" href="#check-in-parameters">Check <code class="docutils literal notranslate"><span class="pre">in</span> <span class="pre">parameters</span></code></a></li>
<li class="toctree-l4"><a class="reference internal" href="#check-before-and-after-at-the-same-time">Check <em>before</em> and <em>after</em> at the same time</a></li>
<li class="toctree-l4"><a class="reference internal" href="#use-x-to-check-more-details">Use <code class="docutils literal notranslate"><span class="pre">-x</span></code> to check more details</a></li>
<li class="toctree-l4"><a class="reference internal" href="#use-condition-expressions-to-locate-specific-call">Use condition expressions to locate specific call</a></li>
<li class="toctree-l4"><a class="reference internal" href="#check-exceptions">Check <code class="docutils literal notranslate"><span class="pre">exceptions</span></code></a></li>
<li class="toctree-l4"><a class="reference internal" href="#filter-based-on-time-cost">Filter based on time cost</a></li>
<li class="toctree-l4"><a class="reference internal" href="#check-the-global-properties-of-the-target-object">Check the global properties of the target object</a></li>
</ul>
</li>
</ul>
</li>
<li class="toctree-l2"><a class="reference internal" href="trace.html">trace</a></li>
<li class="toctree-l2"><a class="reference internal" href="stack.html">stack</a></li>
<li class="toctree-l2"><a class="reference internal" href="tt.html">tt</a></li>
<li class="toctree-l2"><a class="reference internal" href="options.html">options</a></li>
<li class="toctree-l2"><a class="reference internal" href="commands.html#basic-arthas-commands">Basic Arthas Commands</a></li>
</ul>
</li>
<li class="toctree-l1"><a class="reference external" href="https://github.com/alibaba/arthas/issues?q=label%3Auser-case">User cases</a></li>
<li class="toctree-l1"><a class="reference external" href="https://github.com/alibaba/arthas/issues?q=label%3Aquestion-answered">Questions and answers</a></li>
<li class="toctree-l1"><a class="reference external" href="https://github.com/alibaba/arthas">Fork me at GitHub</a></li>
<li class="toctree-l1"><a class="reference external" href="https://github.com/alibaba/arthas/blob/master/CONTRIBUTING.md">CONTRIBUTING</a></li>
<li class="toctree-l1"><a class="reference internal" href="release-notes.html">Release Notes</a></li>
</ul>
</div>
</div>
</nav>
<section data-toggle="wy-nav-shift" class="wy-nav-content-wrap">
<nav class="wy-nav-top" aria-label="top navigation">
<i data-toggle="wy-nav-top" class="fa fa-bars"></i>
<a href="index.html">Arthas</a>
</nav>
<div class="wy-nav-content">
<div class="rst-content">
<div role="navigation" aria-label="breadcrumbs navigation">
<ul class="wy-breadcrumbs">
<li><a href="index.html">Docs</a> »</li>
<li><a href="commands.html">All Commands</a> »</li>
<li>watch</li>
<li class="wy-breadcrumbs-aside">
<a href="https://github.com/alibaba/arthas/blob/master/site/src/site/sphinx/en/watch.md" class="fa fa-github"> Edit on GitHub</a>
</li>
</ul>
<hr/>
</div>
<div role="main" class="document" itemscope="itemscope" itemtype="http://schema.org/Article">
<div itemprop="articleBody">
<div class="section" id="watch">
<span id="watch"></span><h1>watch<a class="headerlink" href="#watch" title="Permalink to this headline">¶</a></h1>
<p>Monitor methods in data aspect including <code class="docutils literal notranslate"><span class="pre">return</span> <span class="pre">values</span></code>, <code class="docutils literal notranslate"><span class="pre">exceptions</span></code> and <code class="docutils literal notranslate"><span class="pre">parameters</span></code>.</p>
<p>With the help of <a class="reference external" href="https://en.wikipedia.org/wiki/OGNL">OGNL</a>, you can easily check the details of variables when methods being invoked.</p>
<div class="section" id="parameters-options">
<span id="parameters-options"></span><h2>Parameters & Options<a class="headerlink" href="#parameters-options" title="Permalink to this headline">¶</a></h2>
<p>There are four different scenarios for <code class="docutils literal notranslate"><span class="pre">watch</span></code> command, which makes it rather complicated.</p>
<table border="1" class="docutils">
<thead>
<tr>
<th align="right">Name</th>
<th align="left">Specification</th>
</tr>
</thead>
<tbody>
<tr>
<td align="right"><em>class-pattern</em></td>
<td align="left">pattern for the class name</td>
</tr>
<tr>
<td align="right"><em>method-pattern</em></td>
<td align="left">pattern for the method name</td>
</tr>
<tr>
<td align="right"><em>expression</em></td>
<td align="left">expression to monitor</td>
</tr>
<tr>
<td align="right"><em>condition-expression</em></td>
<td align="left">condition expression to filter</td>
</tr>
<tr>
<td align="right">[b]</td>
<td align="left">before method being invoked</td>
</tr>
<tr>
<td align="right">[e]</td>
<td align="left">when method encountering exceptions</td>
</tr>
<tr>
<td align="right">[s]</td>
<td align="left">when method exits normally</td>
</tr>
<tr>
<td align="right">[f]</td>
<td align="left">when method exits (either succeed or fail with exceptions)</td>
</tr>
<tr>
<td align="right">[E]</td>
<td align="left">turn on regex matching while the default is wildcard matching</td>
</tr>
<tr>
<td align="right">[x:]</td>
<td align="left">the depth to print the specified property with default value: 1</td>
</tr>
</tbody>
</table><p>F.Y.I</p>
<ol class="simple">
<li>any valid OGNL expression as <code class="docutils literal notranslate"><span class="pre">"{params,returnObj}"</span></code> supported</li>
<li>there are four <em>watching</em> points: <code class="docutils literal notranslate"><span class="pre">-b</span></code>, <code class="docutils literal notranslate"><span class="pre">-e</span></code>, <code class="docutils literal notranslate"><span class="pre">-s</span></code> and <code class="docutils literal notranslate"><span class="pre">-f</span></code> (the first three are off in default while <code class="docutils literal notranslate"><span class="pre">-f</span></code> on);</li>
<li>at the <em>watching</em> point, Arthas will use the <em>expression</em> to evaluate the variables and print them out;</li>
<li><code class="docutils literal notranslate"><span class="pre">in</span> <span class="pre">parameters</span></code> and <code class="docutils literal notranslate"><span class="pre">out</span> <span class="pre">parameters</span></code> are different since they can be modified within the invoked methods; <code class="docutils literal notranslate"><span class="pre">params</span></code> stands for <code class="docutils literal notranslate"><span class="pre">in</span> <span class="pre">parameters</span></code> in <code class="docutils literal notranslate"><span class="pre">-b</span></code>while <code class="docutils literal notranslate"><span class="pre">out</span> <span class="pre">parameters</span></code> in other <em>watching</em> points;</li>
<li>there are no <code class="docutils literal notranslate"><span class="pre">return</span> <span class="pre">values</span></code> and <code class="docutils literal notranslate"><span class="pre">exceptions</span></code> when using <code class="docutils literal notranslate"><span class="pre">-b</span></code>.</li>
</ol>
<p>Advanced:</p>
<div class="toctree-wrapper compound">
<ul>
<li class="toctree-l1"><a class="reference internal" href="advice-class.html">Critical fields in</a></li>
<li class="toctree-l1"><a class="reference external" href="https://github.com/alibaba/arthas/issues/71">Special usages</a></li>
<li class="toctree-l1"><a class="reference external" href="https://commons.apache.org/proper/commons-ognl/language-guide.html">OGNL official guide</a></li>
</ul>
</div>
</div>
<div class="section" id="usage">
<span id="usage"></span><h2>Usage<a class="headerlink" href="#usage" title="Permalink to this headline">¶</a></h2>
<p>A demo:</p>
<div class="highlight-java notranslate"><div class="highlight"><pre><span></span> <span class="kd">public</span> <span class="kt">void</span> <span class="nf">execute</span><span class="o">()</span> <span class="o">{</span>
<span class="n">List</span><span class="o"><</span><span class="n">String</span><span class="o">></span> <span class="n">list</span> <span class="o">=</span> <span class="k">new</span> <span class="n">ArrayList</span><span class="o"><</span><span class="n">String</span><span class="o">>();</span>
<span class="n">list</span><span class="o">.</span><span class="na">add</span><span class="o">(</span><span class="s">"a"</span><span class="o">);</span>
<span class="n">list</span><span class="o">.</span><span class="na">add</span><span class="o">(</span><span class="s">"b"</span><span class="o">);</span>
<span class="n">List</span><span class="o"><</span><span class="n">String</span><span class="o">></span> <span class="n">list2</span> <span class="o">=</span> <span class="k">new</span> <span class="n">ArrayList</span><span class="o"><</span><span class="n">String</span><span class="o">>();</span>
<span class="n">list2</span><span class="o">.</span><span class="na">add</span><span class="o">(</span><span class="s">"c"</span><span class="o">);</span>
<span class="n">list2</span><span class="o">.</span><span class="na">add</span><span class="o">(</span><span class="s">"d"</span><span class="o">);</span>
<span class="kt">int</span> <span class="n">len</span> <span class="o">=</span> <span class="n">add</span><span class="o">(</span><span class="n">list</span><span class="o">,</span> <span class="n">list2</span><span class="o">);</span>
<span class="o">}</span>
<span class="kd">private</span> <span class="kd">static</span> <span class="kt">int</span> <span class="nf">add</span><span class="o">(</span><span class="n">List</span><span class="o"><</span><span class="n">String</span><span class="o">></span> <span class="n">list</span><span class="o">,</span> <span class="n">List</span><span class="o"><</span><span class="n">String</span><span class="o">></span> <span class="n">list2</span><span class="o">)</span> <span class="o">{</span>
<span class="n">list</span><span class="o">.</span><span class="na">addAll</span><span class="o">(</span><span class="n">list2</span><span class="o">);</span>
<span class="k">return</span> <span class="n">list</span><span class="o">.</span><span class="na">size</span><span class="o">();</span>
<span class="o">}</span>
</pre></div>
</div>
<div class="section" id="check-the-out-parameters-and-return-value">
<span id="check-the-out-parameters-and-return-value"></span><h3>Check the <code class="docutils literal notranslate"><span class="pre">out</span> <span class="pre">parameters</span></code> and <code class="docutils literal notranslate"><span class="pre">return</span> <span class="pre">value</span></code><a class="headerlink" href="#check-the-out-parameters-and-return-value" title="Permalink to this headline">¶</a></h3>
<div class="highlight-shell notranslate"><div class="highlight"><pre><span></span>$ watch com.alibaba.sample.petstore.web.store.module.screen.ItemList add <span class="s2">"{params,returnObj}"</span> -x <span class="m">2</span>
Press Ctrl+C to abort.
Affect<span class="o">(</span>class-cnt:1 , method-cnt:1<span class="o">)</span> cost in <span class="m">44</span> ms.
@ArrayList<span class="o">[</span>
@Object<span class="o">[][</span>
@ArrayList<span class="o">[</span><span class="nv">isEmpty</span><span class="o">=</span>false<span class="p">;</span><span class="nv">size</span><span class="o">=</span><span class="m">4</span><span class="o">]</span>,
@ArrayList<span class="o">[</span><span class="nv">isEmpty</span><span class="o">=</span>false<span class="p">;</span><span class="nv">size</span><span class="o">=</span><span class="m">2</span><span class="o">]</span>,
<span class="o">]</span>,
@Integer<span class="o">[</span><span class="m">4</span><span class="o">]</span>,
<span class="o">]</span>
</pre></div>
</div>
</div>
<div class="section" id="check-in-parameters">
<span id="check-in-parameters"></span><h3>Check <code class="docutils literal notranslate"><span class="pre">in</span> <span class="pre">parameters</span></code><a class="headerlink" href="#check-in-parameters" title="Permalink to this headline">¶</a></h3>
<div class="highlight-shell notranslate"><div class="highlight"><pre><span></span>$ watch com.alibaba.sample.petstore.web.store.module.screen.ItemList add <span class="s2">"{params,returnObj}"</span> -x <span class="m">2</span> -b
Press Ctrl+C to abort.
Affect<span class="o">(</span>class-cnt:1 , method-cnt:1<span class="o">)</span> cost in <span class="m">48</span> ms.
@ArrayList<span class="o">[</span>
@Object<span class="o">[][</span>
@ArrayList<span class="o">[</span><span class="nv">isEmpty</span><span class="o">=</span>false<span class="p">;</span><span class="nv">size</span><span class="o">=</span><span class="m">2</span><span class="o">]</span>,
@ArrayList<span class="o">[</span><span class="nv">isEmpty</span><span class="o">=</span>false<span class="p">;</span><span class="nv">size</span><span class="o">=</span><span class="m">2</span><span class="o">]</span>,
<span class="o">]</span>,
null,
<span class="o">]</span>
</pre></div>
</div>
<p>Compared to the previous <em>check</em>, there are two differences:</p>
<ol class="simple">
<li>size of <code class="docutils literal notranslate"><span class="pre">params[0]</span></code> is <code class="docutils literal notranslate"><span class="pre">2</span></code> instead of <code class="docutils literal notranslate"><span class="pre">4</span></code>;</li>
<li><code class="docutils literal notranslate"><span class="pre">return</span> <span class="pre">value</span></code> is <code class="docutils literal notranslate"><span class="pre">null</span></code> since it’s <code class="docutils literal notranslate"><span class="pre">-b</span></code>.</li>
</ol>
</div>
<div class="section" id="check-before-and-after-at-the-same-time">
<span id="check-before-and-after-at-the-same-time"></span><h3>Check <em>before</em> and <em>after</em> at the same time<a class="headerlink" href="#check-before-and-after-at-the-same-time" title="Permalink to this headline">¶</a></h3>
<div class="highlight-shell notranslate"><div class="highlight"><pre><span></span>$ watch com.alibaba.sample.petstore.web.store.module.screen.ItemList add <span class="s2">"{params,returnObj}"</span> -x <span class="m">2</span> -b -s
Press Ctrl+C to abort.
Affect<span class="o">(</span>class-cnt:1 , method-cnt:1<span class="o">)</span> cost in <span class="m">59</span> ms.
@ArrayList<span class="o">[</span>
@Object<span class="o">[][</span>
@ArrayList<span class="o">[</span><span class="nv">isEmpty</span><span class="o">=</span>false<span class="p">;</span><span class="nv">size</span><span class="o">=</span><span class="m">2</span><span class="o">]</span>,
@ArrayList<span class="o">[</span><span class="nv">isEmpty</span><span class="o">=</span>false<span class="p">;</span><span class="nv">size</span><span class="o">=</span><span class="m">2</span><span class="o">]</span>,
<span class="o">]</span>,
null,
<span class="o">]</span>
@ArrayList<span class="o">[</span>
@Object<span class="o">[][</span>
@ArrayList<span class="o">[</span><span class="nv">isEmpty</span><span class="o">=</span>false<span class="p">;</span><span class="nv">size</span><span class="o">=</span><span class="m">4</span><span class="o">]</span>,
@ArrayList<span class="o">[</span><span class="nv">isEmpty</span><span class="o">=</span>false<span class="p">;</span><span class="nv">size</span><span class="o">=</span><span class="m">2</span><span class="o">]</span>,
<span class="o">]</span>,
@Integer<span class="o">[</span><span class="m">4</span><span class="o">]</span>,
<span class="o">]</span>
</pre></div>
</div>
<p>F.Y.I</p>
<ol class="simple">
<li>the first block of output is the <em>before watching</em> point;</li>
<li>the order of the output determined by the <em>watching</em> order itself (nothing to do with the order of the options <code class="docutils literal notranslate"><span class="pre">-b</span> <span class="pre">-s</span></code>).</li>
</ol>
</div>
<div class="section" id="use-x-to-check-more-details">
<span id="use-x-to-check-more-details"></span><h3>Use <code class="docutils literal notranslate"><span class="pre">-x</span></code> to check more details<a class="headerlink" href="#use-x-to-check-more-details" title="Permalink to this headline">¶</a></h3>
<div class="highlight-shell notranslate"><div class="highlight"><pre><span></span>$ watch com.alibaba.sample.petstore.web.store.module.screen.ItemList add <span class="s2">"{params,returnObj}"</span> -x <span class="m">3</span>
Press Ctrl+C to abort.
Affect<span class="o">(</span>class-cnt:1 , method-cnt:1<span class="o">)</span> cost in <span class="m">59</span> ms.
@ArrayList<span class="o">[</span>
@Object<span class="o">[][</span>
@ArrayList<span class="o">[</span>
@String<span class="o">[</span>a<span class="o">]</span>,
@String<span class="o">[</span>b<span class="o">]</span>,
@String<span class="o">[</span>c<span class="o">]</span>,
@String<span class="o">[</span>d<span class="o">]</span>,
<span class="o">]</span>,
@ArrayList<span class="o">[</span>
@String<span class="o">[</span>c<span class="o">]</span>,
@String<span class="o">[</span>d<span class="o">]</span>,
<span class="o">]</span>,
<span class="o">]</span>,
@Integer<span class="o">[</span><span class="m">4</span><span class="o">]</span>,
<span class="o">]</span>
</pre></div>
</div>
</div>
<div class="section" id="use-condition-expressions-to-locate-specific-call">
<span id="use-condition-expressions-to-locate-specific-call"></span><h3>Use condition expressions to locate specific call<a class="headerlink" href="#use-condition-expressions-to-locate-specific-call" title="Permalink to this headline">¶</a></h3>
<div class="highlight-shell notranslate"><div class="highlight"><pre><span></span>$ watch com.alibaba.sample.petstore.biz.impl.UserManagerImpl testAdd <span class="s2">"{params, returnObj}"</span> <span class="s2">"params[0].equals('aaa')"</span> -x <span class="m">2</span>
Press Ctrl+C to abort.
Affect<span class="o">(</span>class-cnt:1 , method-cnt:1<span class="o">)</span> cost in <span class="m">29</span> ms.
@ArrayList<span class="o">[</span>
@Object<span class="o">[][</span>
@String<span class="o">[</span>aaa<span class="o">]</span>,
@String<span class="o">[</span>bbb<span class="o">]</span>,
<span class="o">]</span>,
@Integer<span class="o">[</span><span class="m">6</span><span class="o">]</span>,
<span class="o">]</span>
</pre></div>
</div>
</div>
<div class="section" id="check-exceptions">
<span id="check-exceptions"></span><h3>Check <code class="docutils literal notranslate"><span class="pre">exceptions</span></code><a class="headerlink" href="#check-exceptions" title="Permalink to this headline">¶</a></h3>
<div class="highlight-shell notranslate"><div class="highlight"><pre><span></span>$ watch com.alibaba.sample.petstore.biz.impl.UserManagerImpl testAdd <span class="s2">"{params, throwExp}"</span> -e -x <span class="m">2</span>
Press Ctrl+C to abort.
Affect<span class="o">(</span>class-cnt:1 , method-cnt:1<span class="o">)</span> cost in <span class="m">29</span> ms.
@ArrayList<span class="o">[</span>
@Object<span class="o">[][</span>
@String<span class="o">[</span>aaa<span class="o">]</span>,
@String<span class="o">[</span>bbb<span class="o">]</span>,
<span class="o">]</span>,
java.lang.NullPointerException
at com.alibaba.sample.petstore.biz.impl.UserManagerImpl.testAdd<span class="o">(</span>UserManagerImpl.java:75<span class="o">)</span>
at com.alibaba.sample.petstore.biz.impl.UserManagerImpl.register<span class="o">(</span>UserManagerImpl.java:60<span class="o">)</span>
at com.alibaba.sample.petstore.web.user.module.action.RegisterAction.doRegister<span class="o">(</span>RegisterAction.java:45<span class="o">)</span>
at com.alibaba.sample.petstore.web.user.module.action.RegisterAction<span class="nv">$$</span>FastClassByCGLIB<span class="nv">$$</span>ad5428f1.invoke<span class="o">(</span><generated><span class="o">)</span>
at net.sf.cglib.reflect.FastMethod.invoke<span class="o">(</span>FastMethod.java:53<span class="o">)</span>
at com.alibaba.citrus.service.moduleloader.impl.adapter.MethodInvoker.invoke<span class="o">(</span>MethodInvoker.java:70<span class="o">)</span>
at com.alibaba.citrus.service.moduleloader.impl.adapter.AbstractModuleEventAdapter.executeAndReturn<span class="o">(</span>AbstractModuleEventAdapter.java:100<span class="o">)</span>
at com.alibaba.citrus.service.moduleloader.impl.adapter.AbstractModuleEventAdapter.execute<span class="o">(</span>AbstractModuleEventAdapter.java:58<span class="o">)</span>
at com.alibaba.citrus.turbine.pipeline.valve.PerformActionValve.invoke<span class="o">(</span>PerformActionValve.java:63<span class="o">)</span>
at com.alibaba.citrus.service.pipeline.impl.PipelineImpl<span class="nv">$PipelineContextImpl</span>.invokeNext<span class="o">(</span>PipelineImpl.java:157<span class="o">)</span>
at com.alibaba.citrus.service.pipeline.impl.PipelineImpl<span class="nv">$PipelineContextImpl</span>.invoke<span class="o">(</span>PipelineImpl.java:210<span class="o">)</span>
at com.alibaba.citrus.service.pipeline.impl.valve.ChooseValve.invoke<span class="o">(</span>ChooseValve.java:98<span class="o">)</span>
at com.alibaba.citrus.service.pipeline.impl.PipelineImpl<span class="nv">$PipelineContextImpl</span>.invokeNext<span class="o">(</span>PipelineImpl.java:157<span class="o">)</span>
at com.alibaba.citrus.service.pipeline.impl.PipelineImpl<span class="nv">$PipelineContextImpl</span>.invoke<span class="o">(</span>PipelineImpl.java:210<span class="o">)</span>
at com.alibaba.citrus.service.pipeline.impl.valve.LoopValve.invokeBody<span class="o">(</span>LoopValve.java:105<span class="o">)</span>
at com.alibaba.citrus.service.pipeline.impl.valve.LoopValve.invoke<span class="o">(</span>LoopValve.java:83<span class="o">)</span>
at com.alibaba.citrus.service.pipeline.impl.PipelineImpl<span class="nv">$PipelineContextImpl</span>.invokeNext<span class="o">(</span>PipelineImpl.java:157<span class="o">)</span>
at com.alibaba.citrus.turbine.pipeline.valve.PageAuthorizationValve.invoke<span class="o">(</span>PageAuthorizationValve.java:105<span class="o">)</span>
at com.alibaba.citrus.service.pipeline.impl.PipelineImpl<span class="nv">$PipelineContextImpl</span>.invokeNext<span class="o">(</span>PipelineImpl.java:157<span class="o">)</span>
at com.alibaba.citrus.turbine.pipeline.valve.CheckCsrfTokenValve.invoke<span class="o">(</span>CheckCsrfTokenValve.java:123<span class="o">)</span>
at com.alibaba.citrus.service.pipeline.impl.PipelineImpl<span class="nv">$PipelineContextImpl</span>.invokeNext<span class="o">(</span>PipelineImpl.java:157<span class="o">)</span>
at com.alibaba.citrus.turbine.pipeline.valve.AnalyzeURLValve.invoke<span class="o">(</span>AnalyzeURLValve.java:126<span class="o">)</span>
at com.alibaba.citrus.service.pipeline.impl.PipelineImpl<span class="nv">$PipelineContextImpl</span>.invokeNext<span class="o">(</span>PipelineImpl.java:157<span class="o">)</span>
at com.alibaba.citrus.turbine.pipeline.valve.SetLoggingContextValve.invoke<span class="o">(</span>SetLoggingContextValve.java:66<span class="o">)</span>
at com.alibaba.citrus.service.pipeline.impl.PipelineImpl<span class="nv">$PipelineContextImpl</span>.invokeNext<span class="o">(</span>PipelineImpl.java:157<span class="o">)</span>
at com.alibaba.citrus.turbine.pipeline.valve.PrepareForTurbineValve.invoke<span class="o">(</span>PrepareForTurbineValve.java:52<span class="o">)</span>
at com.alibaba.citrus.service.pipeline.impl.PipelineImpl<span class="nv">$PipelineContextImpl</span>.invokeNext<span class="o">(</span>PipelineImpl.java:157<span class="o">)</span>
at com.alibaba.citrus.service.pipeline.impl.PipelineImpl<span class="nv">$PipelineContextImpl</span>.invoke<span class="o">(</span>PipelineImpl.java:210<span class="o">)</span>
at com.alibaba.citrus.webx.impl.WebxControllerImpl.service<span class="o">(</span>WebxControllerImpl.java:43<span class="o">)</span>
at com.alibaba.citrus.webx.impl.WebxRootControllerImpl.handleRequest<span class="o">(</span>WebxRootControllerImpl.java:53<span class="o">)</span>
at com.alibaba.citrus.webx.support.AbstractWebxRootController.service<span class="o">(</span>AbstractWebxRootController.java:165<span class="o">)</span>
at com.alibaba.citrus.webx.servlet.WebxFrameworkFilter.doFilter<span class="o">(</span>WebxFrameworkFilter.java:152<span class="o">)</span>
at com.alibaba.citrus.webx.servlet.FilterBean.doFilter<span class="o">(</span>FilterBean.java:148<span class="o">)</span>
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter<span class="o">(</span>ApplicationFilterChain.java:241<span class="o">)</span>
at org.apache.catalina.core.ApplicationFilterChain.doFilter<span class="o">(</span>ApplicationFilterChain.java:208<span class="o">)</span>
at com.alibaba.citrus.webx.servlet.SetLoggingContextFilter.doFilter<span class="o">(</span>SetLoggingContextFilter.java:61<span class="o">)</span>
at com.alibaba.citrus.webx.servlet.FilterBean.doFilter<span class="o">(</span>FilterBean.java:148<span class="o">)</span>
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter<span class="o">(</span>ApplicationFilterChain.java:241<span class="o">)</span>
at org.apache.catalina.core.ApplicationFilterChain.doFilter<span class="o">(</span>ApplicationFilterChain.java:208<span class="o">)</span>
at org.apache.catalina.core.StandardWrapperValve.invoke<span class="o">(</span>StandardWrapperValve.java:220<span class="o">)</span>
at org.apache.catalina.core.StandardContextValve.invoke<span class="o">(</span>StandardContextValve.java:122<span class="o">)</span>
at com.taobao.tomcat.valves.ContextLoadFilterValve.invoke<span class="o">(</span>ContextLoadFilterValve.java:152<span class="o">)</span>
at org.apache.catalina.core.StandardHostValve.invoke<span class="o">(</span>StandardHostValve.java:170<span class="o">)</span>
at org.apache.catalina.valves.ErrorReportValve.invoke<span class="o">(</span>ErrorReportValve.java:103<span class="o">)</span>
at org.apache.catalina.core.StandardEngineValve.invoke<span class="o">(</span>StandardEngineValve.java:116<span class="o">)</span>
at org.apache.catalina.connector.CoyoteAdapter.service<span class="o">(</span>CoyoteAdapter.java:429<span class="o">)</span>
at org.apache.coyote.http11.AbstractHttp11Processor.process<span class="o">(</span>AbstractHttp11Processor.java:1085<span class="o">)</span>
at org.apache.coyote.AbstractProtocol<span class="nv">$AbstractConnectionHandler</span>.process<span class="o">(</span>AbstractProtocol.java:625<span class="o">)</span>
at org.apache.tomcat.util.net.NioEndpoint<span class="nv">$SocketProcessor</span>.doRun<span class="o">(</span>NioEndpoint.java:1760<span class="o">)</span>
at org.apache.tomcat.util.net.NioEndpoint<span class="nv">$SocketProcessor</span>.run<span class="o">(</span>NioEndpoint.java:1719<span class="o">)</span>
at java.util.concurrent.ThreadPoolExecutor.runWorker<span class="o">(</span>ThreadPoolExecutor.java:1142<span class="o">)</span>
at java.util.concurrent.ThreadPoolExecutor<span class="nv">$Worker</span>.run<span class="o">(</span>ThreadPoolExecutor.java:617<span class="o">)</span>
at org.apache.tomcat.util.threads.TaskThread<span class="nv">$WrappingRunnable</span>.run<span class="o">(</span>TaskThread.java:61<span class="o">)</span>
at java.lang.Thread.run<span class="o">(</span>Thread.java:745<span class="o">)</span>,
<span class="o">]</span>
</pre></div>
</div>
</div>
<div class="section" id="filter-based-on-time-cost">
<span id="filter-based-on-time-cost"></span><h3>Filter based on time cost<a class="headerlink" href="#filter-based-on-time-cost" title="Permalink to this headline">¶</a></h3>
<div class="highlight-shell notranslate"><div class="highlight"><pre><span></span>$ watch com.alibaba.sample.petstore.web.store.module.screen.ItemList add <span class="s2">"{params,returnObj}"</span> <span class="c1">#cost>200 -x 3 </span>
Press Ctrl+C to abort.
Affect<span class="o">(</span>class-cnt:1 , method-cnt:1<span class="o">)</span> cost in <span class="m">59</span> ms.
@ArrayList<span class="o">[</span>
@Object<span class="o">[][</span>
@ArrayList<span class="o">[</span>
@String<span class="o">[</span>a<span class="o">]</span>,
@String<span class="o">[</span>b<span class="o">]</span>,
@String<span class="o">[</span>c<span class="o">]</span>,
@String<span class="o">[</span>d<span class="o">]</span>,
<span class="o">]</span>,
@ArrayList<span class="o">[</span>
@String<span class="o">[</span>c<span class="o">]</span>,
@String<span class="o">[</span>d<span class="o">]</span>,
<span class="o">]</span>,
<span class="o">]</span>,
@Integer<span class="o">[</span><span class="m">4</span><span class="o">]</span>,
<span class="o">]</span>
</pre></div>
</div>
<p>F.Y.I
<code class="docutils literal notranslate"><span class="pre">#cost>200</span></code> (<code class="docutils literal notranslate"><span class="pre">ms</span></code>) filter out all invokings that take less than <code class="docutils literal notranslate"><span class="pre">200ms</span></code>.</p>
</div>
<div class="section" id="check-the-global-properties-of-the-target-object">
<span id="check-the-global-properties-of-the-target-object"></span><h3>Check the global properties of the target object<a class="headerlink" href="#check-the-global-properties-of-the-target-object" title="Permalink to this headline">¶</a></h3>
<p><code class="docutils literal notranslate"><span class="pre">target</span></code> stands for the current object.</p>
<div class="highlight-default notranslate"><div class="highlight"><pre><span></span>$ watch com.taobao.container.web.arthas.rest.MyAppsController myFavoriteApps 'target'
Press Ctrl+C to abort.
Affect(class-cnt:1 , method-cnt:1) cost in 128 ms.
ts=2017-10-31 18:45:55;result=@MyAppsController[
myFavAppsMapper=@$Proxy131[org.apache.ibatis.binding.MapperProxy@563e97f3],
getAppNameAndIdByEmpId=@$Proxy135[HardCodedTarget(type=GetAppNameAndIdByEmpId, url=http://hello.com)],
enableWebConsoleAppsMapper=@$Proxy132[org.apache.ibatis.binding.MapperProxy@7d51e4a8],
]
</pre></div>
</div>
<p><code class="docutils literal notranslate"><span class="pre">target.field_name</span></code> stands for a global property of the current object.</p>
<div class="highlight-default notranslate"><div class="highlight"><pre><span></span>$ watch com.taobao.container.web.arthas.rest.MyAppsController myFavoriteApps 'target.myFavAppsMapper'
Press Ctrl+C to abort.
Affect(class-cnt:1 , method-cnt:1) cost in 126 ms.
ts=2017-10-31 18:46:17;result=@$Proxy131[
m1=@Method[public boolean java.lang.Object.equals(java.lang.Object)],
m2=@Method[public java.lang.String java.lang.Object.toString()],
m5=@Method[public abstract java.util.List com.taobao.container.dal.arthas.mapper.MyFavAppsMapper.listFavApps(java.util.Map)],
m3=@Method[public abstract int com.taobao.container.dal.arthas.mapper.MyFavAppsMapper.delete(java.lang.String,java.lang.String,java.lang.String)],
m4=@Method[public abstract long com.taobao.container.dal.arthas.mapper.MyFavAppsMapper.insert(com.taobao.container.dal.arthas.domain.MyFavAppsDO)],
m0=@Method[public native int java.lang.Object.hashCode()],
]
</pre></div>
</div>
</div>
</div>
</div>
</div>
</div>
<footer>
<div class="rst-footer-buttons" role="navigation" aria-label="footer navigation">
<a href="advice-class.html" class="btn btn-neutral float-right" title="Fundamental Fields in Expressions" accesskey="n" rel="next">Next <span class="fa fa-arrow-circle-right"></span></a>
<a href="monitor.html" class="btn btn-neutral" title="monitor" accesskey="p" rel="prev"><span class="fa fa-arrow-circle-left"></span> Previous</a>
</div>
<hr/>
<div role="contentinfo">
<p>
© Copyright 2018, Alibaba Middleware Group, and contributors.
</p>
</div>
Built with <a href="http://sphinx-doc.org/">Sphinx</a> using a <a href="https://github.com/rtfd/sphinx_rtd_theme">theme</a> provided by <a href="https://readthedocs.org">Read the Docs</a>.
</footer>
</div>
</div>
</section>
</div>
<script type="text/javascript">
var DOCUMENTATION_OPTIONS = {
URL_ROOT:'./',
VERSION:'3.0.6-SNAPSHOT',
LANGUAGE:'en',
COLLAPSE_INDEX:false,
FILE_SUFFIX:'.html',
HAS_SOURCE: true,
SOURCELINK_SUFFIX: '.txt'
};
</script>
<script type="text/javascript" src="_static/jquery.js"></script>
<script type="text/javascript" src="_static/underscore.js"></script>
<script type="text/javascript" src="_static/doctools.js"></script>
<script type="text/javascript" src="https://cdnjs.cloudflare.com/ajax/libs/mathjax/2.7.1/MathJax.js?config=TeX-AMS-MML_HTMLorMML"></script>
<script type="text/javascript" src="_static/js/theme.js"></script>
<script type="text/javascript">
jQuery(function () {
SphinxRtdTheme.Navigation.enable(true);
});
</script>
<div class="github-fork-ribbon-wrapper right">
<div class="github-fork-ribbon">
<a href="https://github.com/alibaba/arthas">Fork me at GitHub</a>
</div>
</div>
<script type="text/javascript" src="_static/add_badges.js"></script>
<script>
var _hmt = _hmt || [];
(function() {
var hm = document.createElement("script");
hm.src = "https://hm.baidu.com/hm.js?d5c5e25b100f0eb51a4c35c8a86ea9b4";
var s = document.getElementsByTagName("script")[0];
s.parentNode.insertBefore(hm, s);
})();
</script>
</body>
</html>