mirror of
https://github.com/201206030/novel-cloud.git
synced 2025-04-27 01:40:50 +00:00
353 lines
12 KiB
HTML
353 lines
12 KiB
HTML
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
|
||
<!-- NewPage -->
|
||
<html lang="zh">
|
||
<head>
|
||
<!-- Generated by javadoc (1.8.0_181) on Sat May 30 11:03:37 CST 2020 -->
|
||
<title>IdWorker</title>
|
||
<meta name="date" content="2020-05-30">
|
||
<link rel="stylesheet" type="text/css" href="../../../../../stylesheet.css" title="Style">
|
||
<script type="text/javascript" src="../../../../../script.js"></script>
|
||
</head>
|
||
<body>
|
||
<script type="text/javascript"><!--
|
||
try {
|
||
if (location.href.indexOf('is-external=true') == -1) {
|
||
parent.document.title="IdWorker";
|
||
}
|
||
}
|
||
catch(err) {
|
||
}
|
||
//-->
|
||
var methods = {"i0":9,"i1":9,"i2":10};
|
||
var tabs = {65535:["t0","所有方法"],1:["t1","静态方法"],2:["t2","实例方法"],8:["t4","具体方法"]};
|
||
var altColor = "altColor";
|
||
var rowColor = "rowColor";
|
||
var tableTab = "tableTab";
|
||
var activeTableTab = "activeTableTab";
|
||
</script>
|
||
<noscript>
|
||
<div>您的浏览器已禁用 JavaScript。</div>
|
||
</noscript>
|
||
<!-- ========= START OF TOP NAVBAR ======= -->
|
||
<div class="topNav"><a name="navbar.top">
|
||
<!-- -->
|
||
</a>
|
||
<div class="skipNav"><a href="#skip.navbar.top" title="跳过导航链接">跳过导航链接</a></div>
|
||
<a name="navbar.top.firstrow">
|
||
<!-- -->
|
||
</a>
|
||
<ul class="navList" title="导航">
|
||
<li><a href="../../../../../overview-summary.html">概览</a></li>
|
||
<li><a href="package-summary.html">程序包</a></li>
|
||
<li class="navBarCell1Rev">类</li>
|
||
<li><a href="class-use/IdWorker.html">使用</a></li>
|
||
<li><a href="package-tree.html">树</a></li>
|
||
<li><a href="../../../../../deprecated-list.html">已过时</a></li>
|
||
<li><a href="../../../../../index-files/index-1.html">索引</a></li>
|
||
<li><a href="../../../../../help-doc.html">帮助</a></li>
|
||
</ul>
|
||
</div>
|
||
<div class="subNav">
|
||
<ul class="navList">
|
||
<li><a href="../../../../../com/java2nb/novel/common/utils/HttpUtil.html" title="com.java2nb.novel.common.utils中的类"><span class="typeNameLink">上一个类</span></a></li>
|
||
<li><a href="../../../../../com/java2nb/novel/common/utils/IpUtil.html" title="com.java2nb.novel.common.utils中的类"><span class="typeNameLink">下一个类</span></a></li>
|
||
</ul>
|
||
<ul class="navList">
|
||
<li><a href="../../../../../index.html?com/java2nb/novel/common/utils/IdWorker.html" target="_top">框架</a></li>
|
||
<li><a href="IdWorker.html" target="_top">无框架</a></li>
|
||
</ul>
|
||
<ul class="navList" id="allclasses_navbar_top">
|
||
<li><a href="../../../../../allclasses-noframe.html">所有类</a></li>
|
||
</ul>
|
||
<div>
|
||
<script type="text/javascript"><!--
|
||
allClassesLink = document.getElementById("allclasses_navbar_top");
|
||
if(window==top) {
|
||
allClassesLink.style.display = "block";
|
||
}
|
||
else {
|
||
allClassesLink.style.display = "none";
|
||
}
|
||
//-->
|
||
</script>
|
||
</div>
|
||
<div>
|
||
<ul class="subNavList">
|
||
<li>概要: </li>
|
||
<li>嵌套 | </li>
|
||
<li>字段 | </li>
|
||
<li><a href="#constructor.summary">构造器</a> | </li>
|
||
<li><a href="#method.summary">方法</a></li>
|
||
</ul>
|
||
<ul class="subNavList">
|
||
<li>详细资料: </li>
|
||
<li>字段 | </li>
|
||
<li><a href="#constructor.detail">构造器</a> | </li>
|
||
<li><a href="#method.detail">方法</a></li>
|
||
</ul>
|
||
</div>
|
||
<a name="skip.navbar.top">
|
||
<!-- -->
|
||
</a></div>
|
||
<!-- ========= END OF TOP NAVBAR ========= -->
|
||
<!-- ======== START OF CLASS DATA ======== -->
|
||
<div class="header">
|
||
<div class="subTitle">com.java2nb.novel.common.utils</div>
|
||
<h2 title="类 IdWorker" class="title">类 IdWorker</h2>
|
||
</div>
|
||
<div class="contentContainer">
|
||
<ul class="inheritance">
|
||
<li>java.lang.Object</li>
|
||
<li>
|
||
<ul class="inheritance">
|
||
<li>com.java2nb.novel.common.utils.IdWorker</li>
|
||
</ul>
|
||
</li>
|
||
</ul>
|
||
<div class="description">
|
||
<ul class="blockList">
|
||
<li class="blockList">
|
||
<hr>
|
||
<br>
|
||
<pre>public class <span class="typeNameLabel">IdWorker</span>
|
||
extends java.lang.Object</pre>
|
||
<div class="block"><p>名称：IdWorker.java</p>
|
||
<p>描述：分布式自增长ID</p>
|
||
<pre>
|
||
Twitter的 Snowflake JAVA实现方案
|
||
</pre>
|
||
核心代码为其IdWorker这个类实现，其原理结构如下，我分别用一个0表示一位，用—分割开部分的作用：
|
||
1||0---0000000000 0000000000 0000000000 0000000000 0 --- 00000 ---00000 ---000000000000
|
||
在上面的字符串中，第一位为未使用（实际上也可作为long的符号位），接下来的41位为毫秒级时间，
|
||
然后5位datacenter标识位，5位机器ID（并不算标识符，实际是为线程标识），
|
||
然后12位该毫秒内的当前毫秒内的计数，加起来刚好64位，为一个Long型。
|
||
这样的好处是，整体上按照时间自增排序，并且整个分布式系统内不会产生ID碰撞（由datacenter和机器ID作区分），
|
||
并且效率较高，经测试，snowflake每秒能够产生26万ID左右，完全满足需要。
|
||
<p>
|
||
64位ID (42(毫秒)+5(机器ID)+5(业务编码)+12(重复累加))</div>
|
||
</li>
|
||
</ul>
|
||
</div>
|
||
<div class="summary">
|
||
<ul class="blockList">
|
||
<li class="blockList">
|
||
<!-- ======== CONSTRUCTOR SUMMARY ======== -->
|
||
<ul class="blockList">
|
||
<li class="blockList"><a name="constructor.summary">
|
||
<!-- -->
|
||
</a>
|
||
<h3>构造器概要</h3>
|
||
<table class="memberSummary" border="0" cellpadding="3" cellspacing="0" summary="构造器概要表, 列表构造器和解释">
|
||
<caption><span>构造器</span><span class="tabEnd"> </span></caption>
|
||
<tr>
|
||
<th class="colOne" scope="col">构造器和说明</th>
|
||
</tr>
|
||
<tr class="altColor">
|
||
<td class="colOne"><code><span class="memberNameLink"><a href="../../../../../com/java2nb/novel/common/utils/IdWorker.html#IdWorker--">IdWorker</a></span>()</code> </td>
|
||
</tr>
|
||
<tr class="rowColor">
|
||
<td class="colOne"><code><span class="memberNameLink"><a href="../../../../../com/java2nb/novel/common/utils/IdWorker.html#IdWorker-long-long-">IdWorker</a></span>(long workerId,
|
||
long datacenterId)</code> </td>
|
||
</tr>
|
||
</table>
|
||
</li>
|
||
</ul>
|
||
<!-- ========== METHOD SUMMARY =========== -->
|
||
<ul class="blockList">
|
||
<li class="blockList"><a name="method.summary">
|
||
<!-- -->
|
||
</a>
|
||
<h3>方法概要</h3>
|
||
<table class="memberSummary" border="0" cellpadding="3" cellspacing="0" summary="方法概要表, 列表方法和解释">
|
||
<caption><span id="t0" class="activeTableTab"><span>所有方法</span><span class="tabEnd"> </span></span><span id="t1" class="tableTab"><span><a href="javascript:show(1);">静态方法</a></span><span class="tabEnd"> </span></span><span id="t2" class="tableTab"><span><a href="javascript:show(2);">实例方法</a></span><span class="tabEnd"> </span></span><span id="t4" class="tableTab"><span><a href="javascript:show(8);">具体方法</a></span><span class="tabEnd"> </span></span></caption>
|
||
<tr>
|
||
<th class="colFirst" scope="col">限定符和类型</th>
|
||
<th class="colLast" scope="col">方法和说明</th>
|
||
</tr>
|
||
<tr id="i0" class="altColor">
|
||
<td class="colFirst"><code>protected static long</code></td>
|
||
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../com/java2nb/novel/common/utils/IdWorker.html#getDatacenterId-long-">getDatacenterId</a></span>(long maxDatacenterId)</code>
|
||
<div class="block">
|
||
数据标识id部分
|
||
</div>
|
||
</td>
|
||
</tr>
|
||
<tr id="i1" class="rowColor">
|
||
<td class="colFirst"><code>protected static long</code></td>
|
||
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../com/java2nb/novel/common/utils/IdWorker.html#getMaxWorkerId-long-long-">getMaxWorkerId</a></span>(long datacenterId,
|
||
long maxWorkerId)</code>
|
||
<div class="block">
|
||
获取 maxWorkerId
|
||
</div>
|
||
</td>
|
||
</tr>
|
||
<tr id="i2" class="altColor">
|
||
<td class="colFirst"><code>long</code></td>
|
||
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../com/java2nb/novel/common/utils/IdWorker.html#nextId--">nextId</a></span>()</code>
|
||
<div class="block">获取下一个ID</div>
|
||
</td>
|
||
</tr>
|
||
</table>
|
||
<ul class="blockList">
|
||
<li class="blockList"><a name="methods.inherited.from.class.java.lang.Object">
|
||
<!-- -->
|
||
</a>
|
||
<h3>从类继承的方法 java.lang.Object</h3>
|
||
<code>clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait</code></li>
|
||
</ul>
|
||
</li>
|
||
</ul>
|
||
</li>
|
||
</ul>
|
||
</div>
|
||
<div class="details">
|
||
<ul class="blockList">
|
||
<li class="blockList">
|
||
<!-- ========= CONSTRUCTOR DETAIL ======== -->
|
||
<ul class="blockList">
|
||
<li class="blockList"><a name="constructor.detail">
|
||
<!-- -->
|
||
</a>
|
||
<h3>构造器详细资料</h3>
|
||
<a name="IdWorker--">
|
||
<!-- -->
|
||
</a>
|
||
<ul class="blockList">
|
||
<li class="blockList">
|
||
<h4>IdWorker</h4>
|
||
<pre>public IdWorker()</pre>
|
||
</li>
|
||
</ul>
|
||
<a name="IdWorker-long-long-">
|
||
<!-- -->
|
||
</a>
|
||
<ul class="blockListLast">
|
||
<li class="blockList">
|
||
<h4>IdWorker</h4>
|
||
<pre>public IdWorker(long workerId,
|
||
long datacenterId)</pre>
|
||
<dl>
|
||
<dt><span class="paramLabel">参数:</span></dt>
|
||
<dd><code>workerId</code> - 工作机器ID</dd>
|
||
<dd><code>datacenterId</code> - 序列号</dd>
|
||
</dl>
|
||
</li>
|
||
</ul>
|
||
</li>
|
||
</ul>
|
||
<!-- ============ METHOD DETAIL ========== -->
|
||
<ul class="blockList">
|
||
<li class="blockList"><a name="method.detail">
|
||
<!-- -->
|
||
</a>
|
||
<h3>方法详细资料</h3>
|
||
<a name="nextId--">
|
||
<!-- -->
|
||
</a>
|
||
<ul class="blockList">
|
||
<li class="blockList">
|
||
<h4>nextId</h4>
|
||
<pre>public long nextId()</pre>
|
||
<div class="block">获取下一个ID</div>
|
||
<dl>
|
||
<dt><span class="returnLabel">返回:</span></dt>
|
||
</dl>
|
||
</li>
|
||
</ul>
|
||
<a name="getMaxWorkerId-long-long-">
|
||
<!-- -->
|
||
</a>
|
||
<ul class="blockList">
|
||
<li class="blockList">
|
||
<h4>getMaxWorkerId</h4>
|
||
<pre>protected static long getMaxWorkerId(long datacenterId,
|
||
long maxWorkerId)</pre>
|
||
<div class="block"><p>
|
||
获取 maxWorkerId
|
||
</p></div>
|
||
</li>
|
||
</ul>
|
||
<a name="getDatacenterId-long-">
|
||
<!-- -->
|
||
</a>
|
||
<ul class="blockListLast">
|
||
<li class="blockList">
|
||
<h4>getDatacenterId</h4>
|
||
<pre>protected static long getDatacenterId(long maxDatacenterId)</pre>
|
||
<div class="block"><p>
|
||
数据标识id部分
|
||
</p></div>
|
||
</li>
|
||
</ul>
|
||
</li>
|
||
</ul>
|
||
</li>
|
||
</ul>
|
||
</div>
|
||
</div>
|
||
<!-- ========= END OF CLASS DATA ========= -->
|
||
<!-- ======= START OF BOTTOM NAVBAR ====== -->
|
||
<div class="bottomNav"><a name="navbar.bottom">
|
||
<!-- -->
|
||
</a>
|
||
<div class="skipNav"><a href="#skip.navbar.bottom" title="跳过导航链接">跳过导航链接</a></div>
|
||
<a name="navbar.bottom.firstrow">
|
||
<!-- -->
|
||
</a>
|
||
<ul class="navList" title="导航">
|
||
<li><a href="../../../../../overview-summary.html">概览</a></li>
|
||
<li><a href="package-summary.html">程序包</a></li>
|
||
<li class="navBarCell1Rev">类</li>
|
||
<li><a href="class-use/IdWorker.html">使用</a></li>
|
||
<li><a href="package-tree.html">树</a></li>
|
||
<li><a href="../../../../../deprecated-list.html">已过时</a></li>
|
||
<li><a href="../../../../../index-files/index-1.html">索引</a></li>
|
||
<li><a href="../../../../../help-doc.html">帮助</a></li>
|
||
</ul>
|
||
</div>
|
||
<div class="subNav">
|
||
<ul class="navList">
|
||
<li><a href="../../../../../com/java2nb/novel/common/utils/HttpUtil.html" title="com.java2nb.novel.common.utils中的类"><span class="typeNameLink">上一个类</span></a></li>
|
||
<li><a href="../../../../../com/java2nb/novel/common/utils/IpUtil.html" title="com.java2nb.novel.common.utils中的类"><span class="typeNameLink">下一个类</span></a></li>
|
||
</ul>
|
||
<ul class="navList">
|
||
<li><a href="../../../../../index.html?com/java2nb/novel/common/utils/IdWorker.html" target="_top">框架</a></li>
|
||
<li><a href="IdWorker.html" target="_top">无框架</a></li>
|
||
</ul>
|
||
<ul class="navList" id="allclasses_navbar_bottom">
|
||
<li><a href="../../../../../allclasses-noframe.html">所有类</a></li>
|
||
</ul>
|
||
<div>
|
||
<script type="text/javascript"><!--
|
||
allClassesLink = document.getElementById("allclasses_navbar_bottom");
|
||
if(window==top) {
|
||
allClassesLink.style.display = "block";
|
||
}
|
||
else {
|
||
allClassesLink.style.display = "none";
|
||
}
|
||
//-->
|
||
</script>
|
||
</div>
|
||
<div>
|
||
<ul class="subNavList">
|
||
<li>概要: </li>
|
||
<li>嵌套 | </li>
|
||
<li>字段 | </li>
|
||
<li><a href="#constructor.summary">构造器</a> | </li>
|
||
<li><a href="#method.summary">方法</a></li>
|
||
</ul>
|
||
<ul class="subNavList">
|
||
<li>详细资料: </li>
|
||
<li>字段 | </li>
|
||
<li><a href="#constructor.detail">构造器</a> | </li>
|
||
<li><a href="#method.detail">方法</a></li>
|
||
</ul>
|
||
</div>
|
||
<a name="skip.navbar.bottom">
|
||
<!-- -->
|
||
</a></div>
|
||
<!-- ======== END OF BOTTOM NAVBAR ======= -->
|
||
</body>
|
||
</html>
|