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# 简介

## 线程池痛点

线程池是一种基于池化思想管理线程的工具，使用线程池可以减少创建销毁线程的开销，避免线程过多导致系统资源耗尽。

在高并发以及大批量的任务处理场景，线程池的使用是必不可少的。

如果有在项目中实际使用线程池，相信你可能会遇到以下痛点：

- 线程池随便定义，线程资源过多，造成服务器高负载。

- 线程池参数不易评估，随着业务的并发提升，业务面临出现故障的风险。
- 线程池任务执行时间超过平均执行周期，开发人员无法感知。
- 线程池任务堆积，触发拒绝策略，影响既有业务正常运行。
- 当业务出现超时、熔断等问题时，因为没有监控，无法确定是不是线程池引起。
- 原生线程池不支持运行时变量的传递，比如 MDC 上下文遇到线程池就 GG。
- 无法执行优雅关闭，当项目关闭时，大量正在运行的线程池任务被丢弃。
- 线程池运行中，任务执行停止，怀疑发生死锁或执行耗时操作，但是无从下手。

## 什么是 Hippo-4J

Hippo-4J 通过对 JDK 线程池增强，以及扩展三方框架底层线程池等功能，为业务系统提高线上运行保障能力。

提供以下功能支持：

- 全局管控 - 管理应用线程池实例。

- 动态变更 - 应用运行时动态变更线程池参数，包括不限于：核心、最大线程数、阻塞队列容量、拒绝策略等。
- 通知报警 - 内置四种报警通知策略，线程池活跃度、容量水位、拒绝策略以及任务执行时间超长。
- 运行监控 - 实时查看线程池运行时数据，最近半小时线程池运行数据图表展示。
- 功能扩展 - 支持线程池任务传递上下文；项目关闭时，支持等待线程池在指定时间内完成任务。
- 多种模式 - 内置两种使用模式：[依赖配置中心](https://hippo4j.cn/docs/user_docs/getting_started/config/hippo4j-config-start) 和 [无中间件依赖](https://hippo4j.cn/docs/user_docs/getting_started/server/hippo4j-server-start)。
- 容器管理 - Tomcat、Jetty、Undertow 容器线程池运行时查看和线程数变更。
- 框架适配 - Dubbo、Hystrix、RabbitMQ、RocketMQ 等消费线程池运行时数据查看和线程数变更。

## 快速开始

对于本地演示目的，请参阅 [Quick start](https://hippo4j.cn/docs/user_docs/user_guide/quick-start)

演示环境： [http://console.hippo4j.cn/index.html](http://console.hippo4j.cn/index.html)

## 接入登记

更多接入的公司，欢迎在 [登记地址](https://github.com/opengoofy/hippo4j/issues/13) 登记，登记仅仅为了产品推广。

## 联系我

![](https://user-images.githubusercontent.com/77398366/185774220-c11951f9-e130-4d60-8204-afb5c51d4401.png)

扫码添加微信，备注：hippo4j，邀您加入群聊。若图片加载不出来，访问 [官网站点](https://hippo4j.cn/docs/user_docs/other/group)。

## 友情链接

- [[ Sa-Token ]](https://github.com/dromara/sa-token)：一个轻量级 java 权限认证框架，让鉴权变得简单、优雅！

- [[ HertzBeat ]](https://github.com/dromara/hertzbeat)：易用友好的云监控系统, 无需 Agent, 强大自定义监控能力。
- [[ JavaGuide ]](https://github.com/Snailclimb/JavaGuide)：一份涵盖大部分 Java 程序员所需要掌握的核心知识。
- [[ toBeBetterJavaer ]](https://github.com/itwanger/toBeBetterJavaer)：一份通俗易懂、风趣幽默的 Java 学习指南。

## 贡献者

感谢所有为项目作出贡献的开发者。如果有意贡献，参考 [good first issue](https://github.com/opengoofy/hippo4j/issues?q=is%3Aopen+is%3Aissue+label%3A%22good+first+issue%22)。

<table>
<tr>
    <td align="center">
        <a href="https://github.com/itmachen">
            <img src="https://avatars.githubusercontent.com/u/77398366?v=4" width="50;" alt="itmachen"/>
            <br />
            <sub><b>小马哥</b></sub>
        </a>
    </td>
    <td align="center">
        <a href="https://github.com/shining-stars-lk">
            <img src="https://avatars.githubusercontent.com/u/40255310?v=4" width="50;" alt="shining-stars-lk"/>
            <br />
            <sub><b>Lucky 8</b></sub>
        </a>
    </td>
    <td align="center">
        <a href="https://github.com/weihubeats">
            <img src="https://avatars.githubusercontent.com/u/42484192?v=4" width="50;" alt="weihubeats"/>
            <br />
            <sub><b>Weihubeats</b></sub>
        </a>
    </td>
    <td align="center">
        <a href="https://github.com/pirme">
            <img src="https://avatars.githubusercontent.com/u/41976977?v=4" width="50;" alt="pirme"/>
            <br />
            <sub><b>李金来</b></sub>
        </a>
    </td>
    <td align="center">
        <a href="https://github.com/shanjianq">
            <img src="https://avatars.githubusercontent.com/u/49084314?v=4" width="50;" alt="shanjianq"/>
            <br />
            <sub><b>Shanjianq</b></sub>
        </a>
    </td>
    <td align="center">
        <a href="https://github.com/hippo4jbot">
            <img src="https://avatars.githubusercontent.com/u/93201205?v=4" width="50;" alt="hippo4jbot"/>
            <br />
            <sub><b>Hippo4jbot[bot]</b></sub>
        </a>
    </td>
    <td align="center">
        <a href="https://github.com/iwangjie">
            <img src="https://avatars.githubusercontent.com/u/23075587?v=4" width="50;" alt="iwangjie"/>
            <br />
            <sub><b>王杰</b></sub>
        </a>
    </td>
    <td align="center">
        <a href="https://github.com/BigXin0109">
            <img src="https://avatars.githubusercontent.com/u/24769514?v=4" width="50;" alt="BigXin0109"/>
            <br />
            <sub><b>BigXin0109</b></sub>
        </a>
    </td>
    <td align="center">
        <a href="https://github.com/pizihao">
            <img src="https://avatars.githubusercontent.com/u/48643103?v=4" width="50;" alt="pizihao"/>
            <br />
            <sub><b>Pizihao</b></sub>
        </a>
    </td></tr>
<tr>
    <td align="center">
        <a href="https://github.com/Gdk666">
            <img src="https://avatars.githubusercontent.com/u/22442067?v=4" width="50;" alt="Gdk666"/>
            <br />
            <sub><b>Null</b></sub>
        </a>
    </td>
    <td align="center">
        <a href="https://github.com/xqxyxchy">
            <img src="https://avatars.githubusercontent.com/u/21134578?v=4" width="50;" alt="xqxyxchy"/>
            <br />
            <sub><b>Null</b></sub>
        </a>
    </td>
    <td align="center">
        <a href="https://github.com/road2master">
            <img src="https://avatars.githubusercontent.com/u/53806703?v=4" width="50;" alt="road2master"/>
            <br />
            <sub><b>Lijx</b></sub>
        </a>
    </td>
    <td align="center">
        <a href="https://github.com/maxisvest">
            <img src="https://avatars.githubusercontent.com/u/20422618?v=4" width="50;" alt="maxisvest"/>
            <br />
            <sub><b>Null</b></sub>
        </a>
    </td>
    <td align="center">
        <a href="https://github.com/baymax55">
            <img src="https://avatars.githubusercontent.com/u/35788491?v=4" width="50;" alt="baymax55"/>
            <br />
            <sub><b>Baymax55</b></sub>
        </a>
    </td>
    <td align="center">
        <a href="https://github.com/zhuanghaozhe">
            <img src="https://avatars.githubusercontent.com/u/73152769?v=4" width="50;" alt="zhuanghaozhe"/>
            <br />
            <sub><b>庄昊哲</b></sub>
        </a>
    </td>
    <td align="center">
        <a href="https://github.com/liulinfei121">
            <img src="https://avatars.githubusercontent.com/u/57127515?v=4" width="50;" alt="liulinfei121"/>
            <br />
            <sub><b>Null</b></sub>
        </a>
    </td>
    <td align="center">
        <a href="https://github.com/Atmanuclear">
            <img src="https://avatars.githubusercontent.com/u/25747005?v=4" width="50;" alt="Atmanuclear"/>
            <br />
            <sub><b>Null</b></sub>
        </a>
    </td>
    <td align="center">
        <a href="https://github.com/hippo4j">
            <img src="https://avatars.githubusercontent.com/u/93200041?v=4" width="50;" alt="hippo4j"/>
            <br />
            <sub><b>Hippo4j</b></sub>
        </a>
    </td></tr>
<tr>
    <td align="center">
        <a href="https://github.com/imyzt">
            <img src="https://avatars.githubusercontent.com/u/28680198?v=4" width="50;" alt="imyzt"/>
            <br />
            <sub><b>杨镇涛</b></sub>
        </a>
    </td>
    <td align="center">
        <a href="https://github.com/Tliutao">
            <img src="https://avatars.githubusercontent.com/u/17719583?v=4" width="50;" alt="Tliutao"/>
            <br />
            <sub><b>Liutao</b></sub>
        </a>
    </td>
    <td align="center">
        <a href="https://github.com/monsterxxp">
            <img src="https://avatars.githubusercontent.com/u/37952446?v=4" width="50;" alt="monsterxxp"/>
            <br />
            <sub><b>Null</b></sub>
        </a>
    </td>
    <td align="center">
        <a href="https://github.com/voilaf">
            <img src="https://avatars.githubusercontent.com/u/16870828?v=4" width="50;" alt="voilaf"/>
            <br />
            <sub><b>Null</b></sub>
        </a>
    </td>
    <td align="center">
        <a href="https://github.com/wulangcode">
            <img src="https://avatars.githubusercontent.com/u/48200100?v=4" width="50;" alt="wulangcode"/>
            <br />
            <sub><b>WuLang</b></sub>
        </a>
    </td>
    <td align="center">
        <a href="https://github.com/gywanghai">
            <img src="https://avatars.githubusercontent.com/u/102774648?v=4" width="50;" alt="gywanghai"/>
            <br />
            <sub><b>二师兄</b></sub>
        </a>
    </td>
    <td align="center">
        <a href="https://github.com/skyemin">
            <img src="https://avatars.githubusercontent.com/u/38172444?v=4" width="50;" alt="skyemin"/>
            <br />
            <sub><b>Null</b></sub>
        </a>
    </td>
    <td align="center">
        <a href="https://github.com/Redick01">
            <img src="https://avatars.githubusercontent.com/u/15903214?v=4" width="50;" alt="Redick01"/>
            <br />
            <sub><b>Redick Liu</b></sub>
        </a>
    </td>
    <td align="center">
        <a href="https://github.com/xiaochengxuyuan">
            <img src="https://avatars.githubusercontent.com/u/9032006?v=4" width="50;" alt="xiaochengxuyuan"/>
            <br />
            <sub><b>Sean Wu</b></sub>
        </a>
    </td></tr>
<tr>
    <td align="center">
        <a href="https://github.com/HKMV">
            <img src="https://avatars.githubusercontent.com/u/26456469?v=4" width="50;" alt="HKMV"/>
            <br />
            <sub><b>Serenity</b></sub>
        </a>
    </td>
    <td align="center">
        <a href="https://github.com/gewuwo">
            <img src="https://avatars.githubusercontent.com/u/97213587?v=4" width="50;" alt="gewuwo"/>
            <br />
            <sub><b>格悟沃</b></sub>
        </a>
    </td>
    <td align="center">
        <a href="https://github.com/hushtian">
            <img src="https://avatars.githubusercontent.com/u/55479601?v=4" width="50;" alt="hushtian"/>
            <br />
            <sub><b>Null</b></sub>
        </a>
    </td>
    <td align="center">
        <a href="https://github.com/jinlingmei">
            <img src="https://avatars.githubusercontent.com/u/24669082?v=4" width="50;" alt="jinlingmei"/>
            <br />
            <sub><b>Null</b></sub>
        </a>
    </td>
    <td align="center">
        <a href="https://github.com/linlinjie">
            <img src="https://avatars.githubusercontent.com/u/22275940?v=4" width="50;" alt="linlinjie"/>
            <br />
            <sub><b>Null</b></sub>
        </a>
    </td>
    <td align="center">
        <a href="https://github.com/selectbook">
            <img src="https://avatars.githubusercontent.com/u/8454350?v=4" width="50;" alt="selectbook"/>
            <br />
            <sub><b>Leping Huang</b></sub>
        </a>
    </td>
    <td align="center">
        <a href="https://github.com/soulmz">
            <img src="https://avatars.githubusercontent.com/u/10662992?v=4" width="50;" alt="soulmz"/>
            <br />
            <sub><b>Soulzz</b></sub>
        </a>
    </td>
    <td align="center">
        <a href="https://github.com/tomsun28">
            <img src="https://avatars.githubusercontent.com/u/24788200?v=4" width="50;" alt="tomsun28"/>
            <br />
            <sub><b>Tomsun28</b></sub>
        </a>
    </td>
    <td align="center">
        <a href="https://github.com/backbay2-yzg">
            <img src="https://avatars.githubusercontent.com/u/64394486?v=4" width="50;" alt="backbay2-yzg"/>
            <br />
            <sub><b>游祖光</b></sub>
        </a>
    </td></tr>
<tr>
    <td align="center">
        <a href="https://github.com/puppet4">
            <img src="https://avatars.githubusercontent.com/u/28887178?v=4" width="50;" alt="puppet4"/>
            <br />
            <sub><b>Tudo</b></sub>
        </a>
    </td>
    <td align="center">
        <a href="https://github.com/yanrongzhen">
            <img src="https://avatars.githubusercontent.com/u/106363931?v=4" width="50;" alt="yanrongzhen"/>
            <br />
            <sub><b>严荣振</b></sub>
        </a>
    </td>
    <td align="center">
        <a href="https://github.com/2EXP">
            <img src="https://avatars.githubusercontent.com/u/26007713?v=4" width="50;" alt="2EXP"/>
            <br />
            <sub><b>Null</b></sub>
        </a>
    </td>
    <td align="center">
        <a href="https://github.com/onesimplecoder">
            <img src="https://avatars.githubusercontent.com/u/30288465?v=4" width="50;" alt="onesimplecoder"/>
            <br />
            <sub><b>Alic</b></sub>
        </a>
    </td>
    <td align="center">
        <a href="https://github.com/CalebZYC">
            <img src="https://avatars.githubusercontent.com/u/42887532?v=4" width="50;" alt="CalebZYC"/>
            <br />
            <sub><b>Null</b></sub>
        </a>
    </td>
    <td align="center">
        <a href="https://github.com/Hibernate5666">
            <img src="https://avatars.githubusercontent.com/u/30147527?v=4" width="50;" alt="Hibernate5666"/>
            <br />
            <sub><b>Cheng Xihong</b></sub>
        </a>
    </td>
    <td align="center">
        <a href="https://github.com/smartdj">
            <img src="https://avatars.githubusercontent.com/u/3272679?v=4" width="50;" alt="smartdj"/>
            <br />
            <sub><b>DJ</b></sub>
        </a>
    </td>
    <td align="center">
        <a href="https://github.com/dmego">
            <img src="https://avatars.githubusercontent.com/u/22118976?v=4" width="50;" alt="dmego"/>
            <br />
            <sub><b>Dmego</b></sub>
        </a>
    </td>
    <td align="center">
        <a href="https://github.com/dousp">
            <img src="https://avatars.githubusercontent.com/u/5936499?v=4" width="50;" alt="dousp"/>
            <br />
            <sub><b>Douspeng</b></sub>
        </a>
    </td></tr>
<tr>
    <td align="center">
        <a href="https://github.com/hl1248">
            <img src="https://avatars.githubusercontent.com/u/70790953?v=4" width="50;" alt="hl1248"/>
            <br />
            <sub><b>Lucas</b></sub>
        </a>
    </td>
    <td align="center">
        <a href="https://github.com/gentlelynn">
            <img src="https://avatars.githubusercontent.com/u/19168453?v=4" width="50;" alt="gentlelynn"/>
            <br />
            <sub><b>Lynn</b></sub>
        </a>
    </td>
    <td align="center">
        <a href="https://github.com/alexhaoxuan">
            <img src="https://avatars.githubusercontent.com/u/46749051?v=4" width="50;" alt="alexhaoxuan"/>
            <br />
            <sub><b>Alexli</b></sub>
        </a>
    </td>
    <td align="center">
        <a href="https://github.com/qizhongju">
            <img src="https://avatars.githubusercontent.com/u/19883548?v=4" width="50;" alt="qizhongju"/>
            <br />
            <sub><b>Bug搬运工</b></sub>
        </a>
    </td>
    <td align="center">
        <a href="https://github.com/san4j">
            <img src="https://avatars.githubusercontent.com/u/40364355?v=4" width="50;" alt="san4j"/>
            <br />
            <sub><b>San4j</b></sub>
        </a>
    </td>
    <td align="center">
        <a href="https://github.com/zhenyed">
            <img src="https://avatars.githubusercontent.com/u/26167590?v=4" width="50;" alt="zhenyed"/>
            <br />
            <sub><b>Zhenye</b></sub>
        </a>
    </td>
    <td align="center">
        <a href="https://github.com/dongming0920">
            <img src="https://avatars.githubusercontent.com/u/57832778?v=4" width="50;" alt="dongming0920"/>
            <br />
            <sub><b>Null</b></sub>
        </a>
    </td>
    <td align="center">
        <a href="https://github.com/f497196689">
            <img src="https://avatars.githubusercontent.com/u/15325854?v=4" width="50;" alt="f497196689"/>
            <br />
            <sub><b>Fengjing</b></sub>
        </a>
    </td>
    <td align="center">
        <a href="https://github.com/Snailclimb">
            <img src="https://avatars.githubusercontent.com/u/29880145?v=4" width="50;" alt="Snailclimb"/>
            <br />
            <sub><b>Guide</b></sub>
        </a>
    </td></tr>
<tr>
    <td align="center">
        <a href="https://github.com/hbw1994">
            <img src="https://avatars.githubusercontent.com/u/22744421?v=4" width="50;" alt="hbw1994"/>
            <br />
            <sub><b>Null</b></sub>
        </a>
    </td>
    <td align="center">
        <a href="https://github.com/hncboy">
            <img src="https://avatars.githubusercontent.com/u/27755574?v=4" width="50;" alt="hncboy"/>
            <br />
            <sub><b>Null</b></sub>
        </a>
    </td>
    <td align="center">
        <a href="https://github.com/stronglong">
            <img src="https://avatars.githubusercontent.com/u/15846157?v=4" width="50;" alt="stronglong"/>
            <br />
            <sub><b>Itermis</b></sub>
        </a>
    </td>
    <td align="center">
        <a href="https://github.com/janey668">
            <img src="https://avatars.githubusercontent.com/u/99872936?v=4" width="50;" alt="janey668"/>
            <br />
            <sub><b>Null</b></sub>
        </a>
    </td>
    <td align="center">
        <a href="https://github.com/klsq94">
            <img src="https://avatars.githubusercontent.com/u/16208392?v=4" width="50;" alt="klsq94"/>
            <br />
            <sub><b>Hui Cao</b></sub>
        </a>
    </td>
    <td align="center">
        <a href="https://github.com/kongyanbo-cx">
            <img src="https://avatars.githubusercontent.com/u/58963923?v=4" width="50;" alt="kongyanbo-cx"/>
            <br />
            <sub><b>Null</b></sub>
        </a>
    </td>
    <td align="center">
        <a href="https://github.com/lishiyu">
            <img src="https://avatars.githubusercontent.com/u/36871640?v=4" width="50;" alt="lishiyu"/>
            <br />
            <sub><b>Null</b></sub>
        </a>
    </td>
    <td align="center">
        <a href="https://github.com/Nhxz">
            <img src="https://avatars.githubusercontent.com/u/72447160?v=4" width="50;" alt="Nhxz"/>
            <br />
            <sub><b>Nhxz</b></sub>
        </a>
    </td>
    <td align="center">
        <a href="https://github.com/op-lht">
            <img src="https://avatars.githubusercontent.com/u/34021816?v=4" width="50;" alt="op-lht"/>
            <br />
            <sub><b>Op-lht</b></sub>
        </a>
    </td></tr>
<tr>
    <td align="center">
        <a href="https://github.com/wangjie-github">
            <img src="https://avatars.githubusercontent.com/u/35762878?v=4" width="50;" alt="wangjie-github"/>
            <br />
            <sub><b>Wangjie</b></sub>
        </a>
    </td>
    <td align="center">
        <a href="https://github.com/wangyi123456">
            <img src="https://avatars.githubusercontent.com/u/25248959?v=4" width="50;" alt="wangyi123456"/>
            <br />
            <sub><b>Null</b></sub>
        </a>
    </td>
    <td align="center">
        <a href="https://github.com/Williamren97">
            <img src="https://avatars.githubusercontent.com/u/43086401?v=4" width="50;" alt="Williamren97"/>
            <br />
            <sub><b>William Ren</b></sub>
        </a>
    </td>
    <td align="center">
        <a href="https://github.com/wzw8795">
            <img src="https://avatars.githubusercontent.com/u/90670917?v=4" width="50;" alt="wzw8795"/>
            <br />
            <sub><b>Null</b></sub>
        </a>
    </td>
    <td align="center">
        <a href="https://github.com/huaxianchao">
            <img src="https://avatars.githubusercontent.com/u/50727527?v=4" width="50;" alt="huaxianchao"/>
            <br />
            <sub><b>Null</b></sub>
        </a>
    </td>
    <td align="center">
        <a href="https://github.com/yangzhiw">
            <img src="https://avatars.githubusercontent.com/u/13634974?v=4" width="50;" alt="yangzhiw"/>
            <br />
            <sub><b>Opentanent</b></sub>
        </a>
    </td>
    <td align="center">
        <a href="https://github.com/yhc777">
            <img src="https://avatars.githubusercontent.com/u/71164753?v=4" width="50;" alt="yhc777"/>
            <br />
            <sub><b>Null</b></sub>
        </a>
    </td>
    <td align="center">
        <a href="https://github.com/zhaiweij">
            <img src="https://avatars.githubusercontent.com/u/10173248?v=4" width="50;" alt="zhaiweij"/>
            <br />
            <sub><b>Zhaiweij</b></sub>
        </a>
    </td>
    <td align="center">
        <a href="https://github.com/zhaojinchao95">
            <img src="https://avatars.githubusercontent.com/u/33742097?v=4" width="50;" alt="zhaojinchao95"/>
            <br />
            <sub><b>Zhaojinchao</b></sub>
        </a>
    </td></tr>
<tr>
    <td align="center">
        <a href="https://github.com/zj1997">
            <img src="https://avatars.githubusercontent.com/u/31212787?v=4" width="50;" alt="zj1997"/>
            <br />
            <sub><b>Null</b></sub>
        </a>
    </td>
    <td align="center">
        <a href="https://github.com/li-xiao-shuang">
            <img src="https://avatars.githubusercontent.com/u/34903552?v=4" width="50;" alt="li-xiao-shuang"/>
            <br />
            <sub><b>李晓双 Li Xiao Shuang</b></sub>
        </a>
    </td>
    <td align="center">
        <a href="https://github.com/oreoft">
            <img src="https://avatars.githubusercontent.com/u/51789848?v=4" width="50;" alt="oreoft"/>
            <br />
            <sub><b>没有气的汽水</b></sub>
        </a>
    </td>
    <td align="center">
        <a href="https://github.com/wo883721">
            <img src="https://avatars.githubusercontent.com/u/10241323?v=4" width="50;" alt="wo883721"/>
            <br />
            <sub><b>Xinhao</b></sub>
        </a>
    </td>
    <td align="center">
        <a href="https://github.com/Createsequence">
            <img src="https://avatars.githubusercontent.com/u/49221670?v=4" width="50;" alt="Createsequence"/>
            <br />
            <sub><b>黄成兴</b></sub>
        </a>
    </td></tr>
</table>