tomcat(supplement)HttpConnector.initialize()和start()方法以及StandardContext.start()方法的分析

【0】README

0.0）本文中源代码的背景，参见 tomcat(9)session管理

0.1）本文主要以图片的形式分析他们大致的调用过程；

0.2）HttpCOnnector== org.apache.catalina.connector.http.HttpConnector; 而StandardCOntext== org.apache.catalina.core.StandardContext；

0.3）应用程序的source code 如下：

public final class Bootstrap {
  public static void main(String[] args) {
    System.setProperty("catalina.base", System.getProperty("user.dir"));
    Connector cOnnector= new HttpConnector();
    Wrapper wrapper1 = new SimpleWrapper();
    wrapper1.setName("Session");
    wrapper1.setServletClass("SessionServlet");

    Context cOntext= new StandardContext();
    context.setPath("/myApp");
    context.setDocBase("myApp");
    context.addChild(wrapper1);

    context.addServletMapping("/myApp/Session", "Session");
    LifecycleListener listener = new SimpleContextConfig();
    ((Lifecycle) context).addLifecycleListener(listener);
    Loader loader = new WebappLoader();
    context.setLoader(loader);
    connector.setContainer(context);

    Manager manager = new StandardManager();
    context.setManager(manager);

    try {
      connector.initialize(); // highlight line.
      ((Lifecycle) connector).start(); // highlight line.
      ((Lifecycle) context).start(); // highlight line.

      // make the application wait until we press a key.
      System.in.read();
      ((Lifecycle) context).stop();
    }
    catch (Exception e) {
      e.printStackTrace();
    }
  }
}

【1】HttpConnector.initialize()

【2】HttpConnector.start()

【3】StandardContext.start()

/**
     * Load and initialize all servlets marked "load on startup" in the
     * web application deployment descriptor.
     *
     * @param children Array of wrappers for all currently defined
     *  servlets (including those not declared load on startup)
     */
    public void loadOnStartup(Container children[]) { // org.apache.catalina.core.StandardContext.loadOnStartUp().

        // Collect "load on startup" servlets that need to be initialized
        TreeMap map = new TreeMap();
        for (int i = 0; i 



tomcat(supplement)HttpConnector.initialize() 和 start() 方法 以及 StandardContext.start()方法的分析