概要

  • 开启apr需要的环境
  • 环境搭建
  • 开启apr模式
    • spring boot
    • tomcat

相关文件

  1. APR library
  2. OpenSSL libraries
  3. Java SE Development Kit (JDK)
  4. tomcat native

环境搭建

1.apr安装

解压apr包,默认安装目录在 /usr/local/apr 可以通过–prefix=xxx修改

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cd apr && sudo ./configure && sudo make && sudo make install

2.openssl安装

Mac系统

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brew install openssl

linux系统

In debian based Linux those dependencies could be installed by something like:

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apt-get install libapr1.0-dev libssl-dev

In rpm based Linux those dependencies could be installed by something like:

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yum install apr-devel openssl-devel

3.tomcat-native安装

下载tomcat-native 然后解压。

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cd /tomcat-native/native/  -\
&& sudo ./configure --with-apr=/usr/local/apr --with-ssl=/usr/local/opt/openssl -\
--with-java-home=此处换成你本地的jdk地址指定到jdk目录#/Library/Java/JavaVirtualMachines/jdk1.8.0_144.jdk/Contents/Home -\
&& sudo make && sudo make install

编译成功后，会在/usr/local/apr/lib下有libtcnative-1.0.dylib的库文件，这个就是tomcat启动的依赖库

需要把该文件拷贝到jdk的Extensions目录下就行

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sudo cp /usr/local/apr/lib/libtcnative-1.dylib /Library/Java/Extensions/

开启apr模式

spring boot中开启apr模式

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@Bean
public TomcatServletWebServerFactory tomcatServletWebServerFactory(){
    TomcatServletWebServerFactory serverFactory = new TomcatServletWebServerFactory();
    //设置协议为http1.1
  	serverFactory.setProtocol(Constants.HTTP_11);

    Collection<LifecycleListener> listeners = serverFactory.getContextLifecycleListeners();
    listeners.forEach(lifecycleListener -> {
        if (lifecycleListener instanceof AprLifecycleListener) {
            AprLifecycleListener aprLifecycleListener = (AprLifecycleListener) lifecycleListener;
            //使用apr
          	aprLifecycleListener.setUseAprConnector(true);
        }
    });
    return serverFactory;
}

tomcat

  1. 修改protocol值
    Tomcat默认是HTTP/1.1，如果运行apr模式需要把protocol值修改成apr模式：org.apache.coyote.http11.Http11AprProtocol

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    # vi server.xml
    <Connector port="8080" protocol="org.apache.coyote.http11.Http11AprProtocol"

  1. 修改SSLEngine

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    # vi server.xml
    <Listener className="org.apache.catalina.core.AprLifecycleListener" SSLEngine="off" />

压测

image-20200108233803537

总结

  • AprEndpoint：用C实现，通过JNI调用的。主要提升对静态资源（如HTML、图片、CSS、JS等）的访问性能。
  • AprEndpoint和NioEndpoint在性能上基本接近

结论：前后端分离的项目推荐使用Nio方式，不分离项目可以尝试开启apr模式

apr模式需要环境支持

tomca英文文档

http://tomcat.apache.org/native-doc/