概述
- Tomcat核组件
- Connector：底层通信
- Container：Servlet业务
- 4个级别：Engine，Host，Context，Wrapper（Servlet）
Windows
- 双击startup.bat启动(意味着不带参数)
- CATALINA_HOME未定义，确定CATALINA_HOME
- 从当前位置往外找，直到%CATALINA_HOME%\bin\catalina.bat存在
- %CATALINA_HOME%\bin\catalina.bat start
- catalina.bat
start Tomcat "%JAVA_HOME%\bin\java.exe"
-Djava.util.logging.config.file="%CATALINA_BASE%\conf\logging.properties"
-Djava.util.logging.manager=org.apache.juli.ClassLoaderLogManager
"-Djdk.tls.ephemeralDHKeySize=2048"
-Djava.protocol.handler.pkgs=org.apache.catalina.webresources
-Dignore.endorsed.dirs=""
-classpath "%CATALINA_HOME%\bin\bootstrap.jar;D:\apache-tomcat-9.0.2\bin\tomcat-juli.jar"
-Dcatalina.base="%CATALINA_BASE%"
-Dcatalina.home="%CATALINA_HOME%"
-Djava.io.tmpdir="%CATALINA_BASE%\temp"
org.apache.catalina.startup.Bootstrap start
Bootstrap
- static代码块
- catalinaHomeFile，catalinaBaseFile赋值
- main方法
- Bootstrap bootstrap = new Bootstrap();
- init
- initClassLoaders
- commonLoader，catalinaLoader，sharedLoader
- 用catalinaLoader加载Catalina
- Class<?> startupClass = catalinaLoader.loadClass("org.apache.catalina.startup.Catalina");
- Object startupInstance = startupClass.getConstructor().newInstance();
- 设置Catalina的parentClassLoader属性为sharedLoader
- catalinaDaemon = startupInstance
- daemon = bootstrap
- daemon.setAwait(true)：设置catalinaDaemon的await属性
- daemon.load(args)：调catalinaDaemon的load
- daemon.start()：调catalinaDaemon的start
