Tomcat源代码解析

详细： http://imtiger.net/blog/2013/10/08/tomcat-source-code-study/

1.
Tomcat中的main入口是org.apache.catalina.startup.Bootstrap#main

public void init()throws Exception{

    // Set Catalina path
    setCatalinaHome();
    setCatalinaBase();

    initClassLoaders();

    Thread.currentThread().setContextClassLoader(catalinaLoader);

    SecurityClassLoad.securityClassLoad(catalinaLoader);

    // Load our startup class and call its process() method
    if (log.isDebugEnabled())
        log.debug("Loading startup class");
    // 1
    Class<?> startupClass =
        catalinaLoader.loadClass
        ("org.apache.catalina.startup.Catalina");
    Object startupInstance = startupClass.newInstance();

    // Set the shared extensions class loader
    if (log.isDebugEnabled())
        log.debug("Setting startup class properties");
    String methodName = "setParentClassLoader";
    Class<?> paramTypes[] = new Class[1];
    paramTypes[0] = Class.forName("java.lang.ClassLoader");
    Object paramValues[] = new Object[1];
    paramValues[0] = sharedLoader;
    Method method =
        startupInstance.getClass().getMethod(methodName, paramTypes);
    // 2
    method.invoke(startupInstance, paramValues);
    // 3
    catalinaDaemon = startupInstance;

}

2.
ContainerBase的initInternal方法
protected void initInternal() throws LifecycleException {
    BlockingQueue<Runnable> startStopQueue =
        new LinkedBlockingQueue<Runnable>();
    startStopExecutor = new ThreadPoolExecutor(
            getStartStopThreadsInternal(),
            getStartStopThreadsInternal(), 10, TimeUnit.SECONDS,
            startStopQueue,
            new StartStopThreadFactory(getName() + "-startStop-"));
    startStopExecutor.allowCoreThreadTimeOut(true);
    super.initInternal();
}