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* 增强脚本监听器
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*/</span>
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<span class="token keyword">interface</span> <span class="token class-name">ScriptListener</span> <span class="token punctuation">{</span>
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<span class="token doc-comment comment">/**
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* 脚本创建
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*
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* <span class="token keyword">@param</span> <span class="token parameter">output</span> 输出器
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*/</span>
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<span class="token keyword">void</span> <span class="token function">create</span><span class="token punctuation">(</span><span class="token class-name">Output</span> output<span class="token punctuation">)</span><span class="token punctuation">;</span>
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<span class="token doc-comment comment">/**
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* 脚本销毁
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*
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* <span class="token keyword">@param</span> <span class="token parameter">output</span> 输出器
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*/</span>
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<span class="token keyword">void</span> <span class="token function">destroy</span><span class="token punctuation">(</span><span class="token class-name">Output</span> output<span class="token punctuation">)</span><span class="token punctuation">;</span>
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<span class="token doc-comment comment">/**
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* 方法执行前
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*
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* <span class="token keyword">@param</span> <span class="token parameter">output</span> 输出器
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* <span class="token keyword">@param</span> <span class="token parameter">advice</span> 通知点
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*/</span>
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<span class="token keyword">void</span> <span class="token function">before</span><span class="token punctuation">(</span><span class="token class-name">Output</span> output<span class="token punctuation">,</span> <span class="token class-name">Advice</span> advice<span class="token punctuation">)</span><span class="token punctuation">;</span>
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<span class="token doc-comment comment">/**
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* 方法正常返回
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*
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* <span class="token keyword">@param</span> <span class="token parameter">output</span> 输出器
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* <span class="token keyword">@param</span> <span class="token parameter">advice</span> 通知点
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*/</span>
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<span class="token keyword">void</span> <span class="token function">afterReturning</span><span class="token punctuation">(</span><span class="token class-name">Output</span> output<span class="token punctuation">,</span> <span class="token class-name">Advice</span> advice<span class="token punctuation">)</span><span class="token punctuation">;</span>
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<span class="token doc-comment comment">/**
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* 方法异常返回
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*
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* <span class="token keyword">@param</span> <span class="token parameter">output</span> 输出器
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* <span class="token keyword">@param</span> <span class="token parameter">advice</span> 通知点
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*/</span>
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<span class="token keyword">void</span> <span class="token function">afterThrowing</span><span class="token punctuation">(</span><span class="token class-name">Output</span> output<span class="token punctuation">,</span> <span class="token class-name">Advice</span> advice<span class="token punctuation">)</span><span class="token punctuation">;</span>
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<span class="token punctuation">}</span>
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</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><h3 id="参数-advice-说明" tabindex="-1"><a class="header-anchor" href="#参数-advice-说明" aria-hidden="true">#</a> 参数 <code>Advice</code> 说明</h3><p><code>Advice</code> 参数最主要是封装了通知节点的所有信息。参考<a href="/doc/advice-class.html" class="">表达式核心变量</a>中关于该节点的描述。</p><h3 id="参数-output-说明" tabindex="-1"><a class="header-anchor" href="#参数-output-说明" aria-hidden="true">#</a> 参数 <code>Output</code> 说明</h3><p><code>Output</code> 参数只拥有三个方法，主要的工作还是输出对应的文本信息</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token doc-comment comment">/**
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* 输出器
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*/</span>
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<span class="token keyword">interface</span> <span class="token class-name">Output</span> <span class="token punctuation">{</span>
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<span class="token doc-comment comment">/**
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* 输出字符串(不换行)
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*
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* <span class="token keyword">@param</span> <span class="token parameter">string</span> 待输出字符串
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* <span class="token keyword">@return</span> this
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*/</span>
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<span class="token class-name">Output</span> <span class="token function">print</span><span class="token punctuation">(</span><span class="token class-name">String</span> string<span class="token punctuation">)</span><span class="token punctuation">;</span>
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<span class="token doc-comment comment">/**
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* 输出字符串(换行)
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*
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* <span class="token keyword">@param</span> <span class="token parameter">string</span> 待输出字符串
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* <span class="token keyword">@return</span> this
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*/</span>
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<span class="token class-name">Output</span> <span class="token function">println</span><span class="token punctuation">(</span><span class="token class-name">String</span> string<span class="token punctuation">)</span><span class="token punctuation">;</span>
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<span class="token doc-comment comment">/**
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* 结束当前脚本
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*
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* <span class="token keyword">@return</span> this
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*/</span>
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<span class="token class-name">Output</span> <span class="token function">finish</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
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<span class="token punctuation">}</span>
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</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><h3 id="一个输出日志的-groovy-脚本示例" tabindex="-1"><a class="header-anchor" href="#一个输出日志的-groovy-脚本示例" aria-hidden="true">#</a> 一个输出日志的 groovy 脚本示例</h3><div class="language-groovy ext-groovy line-numbers-mode"><pre class="language-groovy"><code><span class="token keyword">import</span> com<span class="token punctuation">.</span>taobao<span class="token punctuation">.</span>arthas<span class="token punctuation">.</span>core<span class="token punctuation">.</span>command<span class="token punctuation">.</span>ScriptSupportCommand
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<span class="token keyword">import</span> com<span class="token punctuation">.</span>taobao<span class="token punctuation">.</span>arthas<span class="token punctuation">.</span>core<span class="token punctuation">.</span>util<span class="token punctuation">.</span>Advice
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<span class="token keyword">import</span> <span class="token keyword">static</span> java<span class="token punctuation">.</span>lang<span class="token punctuation">.</span>String<span class="token punctuation">.</span>format
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<span class="token comment">/**
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* 输出方法日志
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*/</span>
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<span class="token keyword">public</span> <span class="token keyword">class</span> <span class="token class-name">Logger</span> <span class="token keyword">implements</span> <span class="token class-name">ScriptSupportCommand<span class="token punctuation">.</span>ScriptListener</span> <span class="token punctuation">{</span>
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<span class="token annotation punctuation">@Override</span>
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<span class="token keyword">void</span> <span class="token function">create</span><span class="token punctuation">(</span>ScriptSupportCommand<span class="token punctuation">.</span>Output output<span class="token punctuation">)</span> <span class="token punctuation">{</span>
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output<span class="token punctuation">.</span><span class="token function">println</span><span class="token punctuation">(</span><span class="token interpolation-string"><span class="token string">"script create."</span></span><span class="token punctuation">)</span><span class="token punctuation">;</span>
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<span class="token punctuation">}</span>
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<span class="token annotation punctuation">@Override</span>
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<span class="token keyword">void</span> <span class="token function">destroy</span><span class="token punctuation">(</span>ScriptSupportCommand<span class="token punctuation">.</span>Output output<span class="token punctuation">)</span> <span class="token punctuation">{</span>
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output<span class="token punctuation">.</span><span class="token function">println</span><span class="token punctuation">(</span><span class="token interpolation-string"><span class="token string">"script destroy."</span></span><span class="token punctuation">)</span><span class="token punctuation">;</span>
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<span class="token punctuation">}</span>
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<span class="token annotation punctuation">@Override</span>
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<span class="token keyword">void</span> <span class="token function">before</span><span class="token punctuation">(</span>ScriptSupportCommand<span class="token punctuation">.</span>Output output<span class="token punctuation">,</span> Advice advice<span class="token punctuation">)</span> <span class="token punctuation">{</span>
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output<span class="token punctuation">.</span><span class="token function">println</span><span class="token punctuation">(</span><span class="token function">format</span><span class="token punctuation">(</span><span class="token interpolation-string"><span class="token string">"before:class=%s;method=%s;paramslen=%d;%s;"</span></span><span class="token punctuation">,</span>
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advice<span class="token punctuation">.</span><span class="token function">getClazz</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">.</span><span class="token function">getSimpleName</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">,</span>
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advice<span class="token punctuation">.</span><span class="token function">getMethod</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">.</span><span class="token function">getName</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">,</span>
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advice<span class="token punctuation">.</span><span class="token function">getParams</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">.</span>length<span class="token punctuation">,</span> advice<span class="token punctuation">.</span><span class="token function">getParams</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">)</span>
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<span class="token punctuation">}</span>
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<span class="token annotation punctuation">@Override</span>
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<span class="token keyword">void</span> <span class="token function">afterReturning</span><span class="token punctuation">(</span>ScriptSupportCommand<span class="token punctuation">.</span>Output output<span class="token punctuation">,</span> Advice advice<span class="token punctuation">)</span> <span class="token punctuation">{</span>
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output<span class="token punctuation">.</span><span class="token function">println</span><span class="token punctuation">(</span><span class="token function">format</span><span class="token punctuation">(</span><span class="token interpolation-string"><span class="token string">"returning:class=%s;method=%s;"</span></span><span class="token punctuation">,</span>
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advice<span class="token punctuation">.</span><span class="token function">getClazz</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">.</span><span class="token function">getSimpleName</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">,</span>
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advice<span class="token punctuation">.</span><span class="token function">getMethod</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">.</span><span class="token function">getName</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">)</span>
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<span class="token punctuation">}</span>
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<span class="token annotation punctuation">@Override</span>
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<span class="token keyword">void</span> <span class="token function">afterThrowing</span><span class="token punctuation">(</span>ScriptSupportCommand<span class="token punctuation">.</span>Output output<span class="token punctuation">,</span> Advice advice<span class="token punctuation">)</span> <span class="token punctuation">{</span>
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output<span class="token punctuation">.</span><span class="token function">println</span><span class="token punctuation">(</span><span class="token function">format</span><span class="token punctuation">(</span><span class="token interpolation-string"><span class="token string">"throwing:class=%s;method=%s;"</span></span><span class="token punctuation">,</span>
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advice<span class="token punctuation">.</span><span class="token function">getClazz</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">.</span><span class="token function">getSimpleName</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">,</span>
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advice<span class="token punctuation">.</span><span class="token function">getMethod</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">.</span><span class="token function">getName</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">)</span>
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<span class="token punctuation">}</span>
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<span class="token punctuation">}</span>
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</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>使用示例：</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>$ groovy com.alibaba.sample.petstore.dal.dao.ProductDao getProductById /Users/zhuyong/middleware/arthas/scripts/Logger.groovy -S
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script create.
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Press Ctrl+C to abort.
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Affect(class-cnt:1 , method-cnt:1) cost in 102 ms.
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before:class=IbatisProductDao;method=getProductById;paramslen=1;[Ljava.lang.Object;@45df64fc;
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returning:class=IbatisProductDao;method=getProductById;
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before:class=IbatisProductDao;method=getProductById;paramslen=1;[Ljava.lang.Object;@5b0e2d00;
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returning:class=IbatisProductDao;method=getProductById;
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</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div></div><!--[--><!--]--></div><footer class="page-meta right-menu-padding" data-v-8e2a76de><div class="meta-item edit-link"><a class="external-link meta-item-label" href="https://github.com/alibaba/arthas/edit/master/site/docs/doc/groovy.md" rel="noopener noreferrer" target="_blank" aria-label="在 GitHub 上编辑此页"><!--[--><!--]--><span>在 GitHub 上编辑此页</span><span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">在新窗口打开</span></span><!--[--><!--]--></a></div><div class="meta-item last-updated"><span class="meta-item-label">Last Updated: </span><!----></div><div class="meta-item contributors"><span class="meta-item-label">贡献者: </span><span class="meta-item-info"><!--[--><!--[--><span class="contributor" title="email: hengyunabc@gmail.com">hengyunabc</span><!--[-->, <!--]--><!--]--><!--[--><span class="contributor" title="email: ian.luo@gmail.com">beiwei30</span><!----><!--]--><!--]--></span></div></footer><!----><!--[--><!--]--></main><!--]--></div><!----><!--]--></div>
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