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<!doctype html>
<html class="no-js" lang="en">
<head>
<meta charset="utf-8" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<title>
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function before_search(){
var searchVal = 'site: ' + document.getElementById('search_input').value;
document.getElementById('search_q').value = searchVal;
return true;
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<div class="article">
<a class="clearlink" href="15607549443455.html">
<h1>Camel简介</h1>
<div class="a-content">
<div class="a-content-text">
<p>其实我的理解很简单，camel做了很多的抽象，抽象是根据schema进行的，每个资源有这个不同的schema然后对应着不同的Component，也就是对应这资源的push或者pull。配置的router类似于java的stream-api，每个router对应着processor</p>
</div>
</div>
</a>
<div class="read-more clearfix">
<div class="more-left left">
<a href="15607549443455.html">Read more</a>
<span class="date">2019/6/17</span>
<span>posted in </span>
<span class="posted-in"><a href='apache-camel.html'>apache-camel</a></span>
</div>
<div class="more-right right">
<span class="comments">
</span>
</div>
</div>
</div><!-- article -->
<div class="article">
<a class="clearlink" href="15604111019339.html">
<h1>集群限流</h1>
<div class="a-content">
<div class="a-content-text">
<p>提到集群流控，我们最初能够想到的找一个server来汇总统计总的调用量，其他的实例跟这个server进行通信来判断资源是否可用。</p>
<p>另外集群流控还可以解决流量不均匀导致总体限流效果不佳的问题。假设集群中有 10 台机器，我们给每台机器设置单机限流阈值为 10 QPS，理想情况下整个集群的限流阈值就为 100 QPS。不过实际情况下流量到每台机器可能会不均匀，会导致总量没有到的情况下某些机器就开始限流。因此仅靠单机维度去限制的话会无法精确地限制总体流量。而集群流控可以精确地控制整个集群的调用总量，结合单机限流兜底，可以更好地发挥流量控制的效果。</p>
</div>
</div>
</a>
<div class="read-more clearfix">
<div class="more-left left">
<a href="15604111019339.html">Read more</a>
<span class="date">2019/6/13</span>
<span>posted in </span>
<span class="posted-in"><a href='sentinel.html'>sentinel</a></span>
</div>
<div class="more-right right">
<span class="comments">
</span>
</div>
</div>
</div><!-- article -->
<div class="article">
<a class="clearlink" href="15603235690483.html">
<h1>SPH解释</h1>
<div class="a-content">
<div class="a-content-text">
<p><code>SPH</code>为Sentinel对获取资源是否可用的抽象</p>
</div>
</div>
</a>
<div class="read-more clearfix">
<div class="more-left left">
<a href="15603235690483.html">Read more</a>
<span class="date">2019/6/12</span>
<span>posted in </span>
<span class="posted-in"><a href='sentinel.html'>sentinel</a></span>
</div>
<div class="more-right right">
<span class="comments">
</span>
</div>
</div>
</div><!-- article -->
<div class="article">
<a class="clearlink" href="15603217111185.html">
<h1>JMH java提供的运行在jvm上面的code压测工具</h1>
<div class="a-content">
<div class="a-content-text">
<h2 id="toc_0">demo</h2>
<p>首先引入JMH相关jar</p>
<pre><code class="language-text"> <dependency>
<groupId>org.openjdk.jmh</groupId>
<artifactId>jmh-core</artifactId>
<version>1.21</version>
</dependency>
<dependency>
<groupId>org.openjdk.jmh</groupId>
<artifactId>jmh-generator-annprocess</artifactId>
<version>1.21</version>
<scope>provided</scope>
</dependency>
</code></pre>
</div>
</div>
</a>
<div class="read-more clearfix">
<div class="more-left left">
<a href="15603217111185.html">Read more</a>
<span class="date">2019/6/12</span>
<span>posted in </span>
<span class="posted-in"><a href='sentinel.html'>sentinel</a></span>
</div>
<div class="more-right right">
<span class="comments">
</span>
</div>
</div>
</div><!-- article -->
<div class="article">
<a class="clearlink" href="15383728323545.html">
<h1>state 属性</h1>
<div class="a-content">
<div class="a-content-text">
<pre><code class="language-markup"><!DOCTYPE html>
<html>
<head>
<script src="../build/react.js"></script>
<script src="../build/react-dom.js"></script>
<script src="../build/browser.min.js"></script>
</head>
<body>
<div id="example"></div>
<script type="text/babel">
var LikeButton = React.createClass({
getInitialState: function() {
return {liked: false};
},
getDefaultValue: function()
handleClick: function(event) {
this.setState({liked: !this.state.liked});
},
render: function() {
var text = this.state.liked ? 'like' : 'haven\'t liked';
return (
<p onClick={this.handleClick}>
You {text} this. Click to toggle.
</p>
);
}
});
ReactDOM.render(
<LikeButton />,
document.getElementById('example')
);
</script>
</body>
</html>
</code></pre>
<h2 id="toc_0">解析</h2>
<p>react中认为一个组件即为一个整个state，getInitialState用来初始化state属性，this.setState()用来重新设置state属性，同时组件也会被从新进行渲染。</p>
</div>
</div>
</a>
<div class="read-more clearfix">
<div class="more-left left">
<span class="date">2018/10/1</span>
<span>posted in </span>
<span class="posted-in"><a href='react.html'>react</a></span>
</div>
<div class="more-right right">
<span class="comments">
</span>
</div>
</div>
</div><!-- article -->
<div class="article">
<a class="clearlink" href="15383724150347.html">
<h1>组件寻找</h1>
<div class="a-content">
<div class="a-content-text">
<pre><code class="language-markup"><!DOCTYPE html>
<html>
<head>
<script src="../build/react.js"></script>
<script src="../build/react-dom.js"></script>
<script src="../build/browser.min.js"></script>
</head>
<body>
<div id="example"></div>
<script type="text/babel">
var MyComponent = React.createClass({
handleClick: function() {
this.refs.myTextInput.focus();
},
render: function() {
return (
<div>
<input type="text" ref="myTextInput" />
<input type="button" value="Focus the text input" onClick={this.handleClick} />
</div>
);
}
});
ReactDOM.render(
<MyComponent />,
document.getElementById('example')
);
</script>
</body>
</html>
</code></pre>
<h2 id="toc_0">解析</h2>
<p>react提供属性this.refs用来寻找dom中的组件，但是组件同时要有ref属性</p>
</div>
</div>
</a>
<div class="read-more clearfix">
<div class="more-left left">
<span class="date">2018/10/1</span>
<span>posted in </span>
<span class="posted-in"><a href='react.html'>react</a></span>
</div>
<div class="more-right right">
<span class="comments">
</span>
</div>
</div>
</div><!-- article -->
<div class="article">
<a class="clearlink" href="15383722422081.html">
<h1>属性默认值</h1>
<div class="a-content">
<div class="a-content-text">
<pre><code class="language-javascript">var MyTitle = React.createClass({
getDefaultProps : function () {
return {
title : 'Hello World'
};
},
render: function() {
return <h1> {this.props.title} </h1>;
}
});
ReactDOM.render(
<MyTitle />,
document.getElementById('example')
);
</code></pre>
<h2 id="toc_0">解析</h2>
<p>react 在创建组件类的时候提供方法getDefaultProps来提供默认的属性初始化值。</p>
</div>
</div>
</a>
<div class="read-more clearfix">
<div class="more-left left">
<span class="date">2018/10/1</span>
<span>posted in </span>
<span class="posted-in"><a href='react.html'>react</a></span>
</div>
<div class="more-right right">
<span class="comments">
</span>
</div>
</div>
</div><!-- article -->
<div class="article">
<a class="clearlink" href="15383717462675.html">
<h1>PropTypes 属性</h1>
<div class="a-content">
<div class="a-content-text">
<pre><code class="language-markup"><!DOCTYPE html>
<html>
<head>
<script src="../build/react.js"></script>
<script src="../build/react-dom.js"></script>
<script src="../build/browser.min.js"></script>
</head>
<body>
<div id="example"></div>
<script type="text/babel">
var data = 123;
var MyTitle = React.createClass({
propTypes: {
title: React.PropTypes.string.isRequired,
},
render: function() {
return <h1> {this.props.title} </h1>;
}
});
ReactDOM.render(
<MyTitle title={data} />,
document.getElementById('example')
);
</script>
</body>
</html>
</code></pre>
<h2 id="toc_0">解析</h2>
<p>react compent有变量prop用来存储用户输入的变量，react特别提供PropTypes用来检测用户的输入参数校验</p>
</div>
</div>
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<span class="date">2018/10/1</span>
<span>posted in </span>
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